2004-11-22 Ross Johnson * pthread_cond_wait.c (ptw32_cond_wait_cleanup): Undo change from 2004-11-02. * Makefile (DLL_VER): Added for DLL naming suffix - see README. * GNUmakefile (DLL_VER): Likewise. * Wmakefile (DLL_VER): Likewise. * Bmakefile (DLL_VER): Likewise. * pthread.dsw (version.rc): Added to MSVS workspace. 2004-11-20 Boudewijn Dekker * pthread_getspecific.c (pthread_getspecific): Check for invalid (NULL) key argument. 2004-11-19 Ross Johnson * config.h (PTW32_THREAD_ID_REUSE_INCREMENT): Added to allow building the library for either unique thread IDs like Solaris or non-unique thread IDs like Linux; allows application developers to override the library's default insensitivity to some apps that may not be strictly POSIX compliant. * version.rc: New resource module to encode version information within the DLL. * pthread.h: Added PTW32_VERSION* defines and grouped sections required by resource compiler together; bulk of file is skipped if RC_INVOKED. Defined some error numbers and other names for Borland compiler. 2004-11-02 Ross Johnson * pthread_cond_wait.c (ptw32_cond_wait_cleanup): Lock CV mutex at start of cleanup handler rather than at the end. * implement.h (PTW32_THREAD_REUSE_EMPTY): Renamed from *_BOTTOM. (ptw32_threadReuseBottom): New global variable. * global.c (ptw32_threadReuseBottom): Declare new variable. * ptw32_reuse.c (ptw32_reuse): Change reuse LIFO stack to LILO queue to more evenly distribute use of reusable thread IDs; use renamed PTW32_THREAD_REUSE_EMPTY. * ptw32_processTerminate.c (ptw2_processTerminate): Use renamed PTW32_THREAD_REUSE_EMPTY. 2004-10-31 Ross Johnson * implement.h (PThreadState): Add new state value 'PThreadStateCancelPending'. * pthread_testcancel.c (pthread_testcancel): Use new thread 'PThreadStateCancelPending' state as short cut to avoid entering kernel space via WaitForSingleObject() call. This was obviated by user space sema acquisition in sem_wait() and sem_timedwait(), which are also cancelation points. A call to pthread_testcancel() was required, which introduced a kernel call, effectively nullifying any gains made by the user space sem acquisition checks. * pthread_cancel.c (pthread_cancel): Set new thread 'PThreadStateCancelPending' state. 2004-10-29 Ross Johnson * implement.h (pthread_t): Renamed to ptw32_thread_t; struct contains all thread state. * pthread.h (ptw32_handle_t): New general purpose struct to serve as a handle for various reusable object IDs - currently only used by pthread_t; contains a pointer to ptw32_thread_t (thread state) and a general purpose uint for use as a reuse counter or flags etc. (pthread_t): typedef'ed to ptw32_handle_t; the uint is the reuse counter that allows the library to maintain unique POSIX thread IDs. When the pthread struct reuse stack was introduced, threads would often acquire an identical ID to a previously destroyed thread. The same was true for the pre-reuse stack library, by virtue of pthread_t being the address of the thread struct. The new pthread_t retains the reuse stack but provides virtually unique thread IDs. * sem_wait.c (ptw32_sem_wait_cleanup): New routine used for cancelation cleanup. * sem_timedwait.c (ptw32_sem_timedwait_cleanup): Likewise. 2004-10-22 Ross Johnson * sem_init.c (sem_init): Introduce a 'lock' element in order to replace the interlocked operations with conventional serialisation. This is needed in order to be able to atomically modify the sema value and perform Win32 sema release operations. Win32 semaphores are used instead of events in order to support efficient multiple posting. If the whole modify/release isn't atomic, a race between sem_timedwait() and sem_post() could result in a release when there is no waiting semaphore, which would cause too many threads to proceed. * sem_wait.c (sem_wait): Use new 'lock'element. * sem_timedwait.c (sem_timedwait): Likewise. * sem_trywait.c (sem_trywait): Likewise. * sem_post.c (sem_post): Likewise. * sem_post_multiple.c (sem_post_multiple): Likewise. * sem_getvalue.c (sem_getvalue): Likewise. * ptw32_semwait.c (ptw32_semwait): Likewise. * sem_destroy.c (sem_destroy): Likewise; also tightened the conditions for semaphore destruction; in particular, a semaphore will not be destroyed if it has waiters. * sem_timedwait.c (sem_timedwait): Added cancel cleanup handler to restore sema value when cancelled. * sem_wait.c (sem_wait): Likewise. 2004-10-21 Ross Johnson * pthread_mutex_unlock.c (pthread_mutex_unlock): Must use PulseEvent() rather than SetEvent() to reset the event if there are no waiters. 2004-10-19 Ross Johnson * sem_init.c (sem_init): New semaphore model based on the same idea as mutexes, i.e. user space interlocked check to avoid unnecessarily entering kernel space. Wraps the Win32 semaphore and keeps it's own counter. Although the motivation to do this has existed for a long time, credit goes to Alexander Terekhov for providing the logic. I have deviated slightly from AT's logic to add the waiters count, which has made the code more complicated by adding cancelation cleanup. This also appears to have broken the VCE (C++ EH) version of the library (the same problem as previously reported - see BUGS #2), only apparently not fixable using the usual workaround, nor by turning all optimisation off. The GCE version works fine, so it is presumed to be a bug in MSVC++ 6.0. The cancelation exception is thrown and caught correctly, but the cleanup class destructor is never called. The failing test is tests\semaphore4.c. * sem_wait.c (sem_wait): Implemented user space check model. * sem_post.c (sem_post): Likewise. * sem_trywait.c (sem_trywait): Likewise. * sem_timedwait.c (sem_timedwait): Likewise. * sem_post_multiple.c (sem_post_multiple): Likewise. * sem_getvalue.c (sem_getvalue): Likewise. * ptw32_semwait.c (ptw32_semwait): Likewise. * implement.h (sem_t_): Add counter element. 2004-10-15 Ross Johnson * implement.h (pthread_mutex_t_): Use an event in place of the POSIX semaphore. * pthread_mutex_init.c: Create the event; remove semaphore init. * pthread_mutex_destroy.c: Delete the event. * pthread_mutex_lock.c: Replace the semaphore wait with the event wait. * pthread_mutex_trylock.c: Likewise. * pthread_mutex_timedlock.c: Likewise. * pthread_mutex_unlock.c: Set the event. 2004-10-14 Ross Johnson * pthread_mutex_lock.c (pthread_mutex_lock): New algorithm using Terekhov's xchg based variation of Drepper's cmpxchg model. Theoretically, xchg uses fewer clock cycles than cmpxchg (using IA-32 as a reference), however, in my opinion bus locking dominates the equation on smp systems, so the model with the least number of bus lock operations in the execution path should win, which is Terekhov's variant. On IA-32 uni-processor systems, it's faster to use the CMPXCHG instruction without locking the bus than to use the XCHG instruction, which always locks the bus. This makes the two variants equal for the non-contended lock (fast lane) execution path on up IA-32. Testing shows that the xchg variant is faster on up IA-32 as well if the test forces higher lock contention frequency, even though kernel calls should be dominating the times (on up IA-32, both variants used CMPXCHG instructions and neither locked the bus). * pthread_mutex_timedlock.c pthread_mutex_timedlock(): Similarly. * pthread_mutex_trylock.c (pthread_mutex_trylock): Similarly. * pthread_mutex_unlock.c (pthread_mutex_unlock): Similarly. * ptw32_InterlockedCompareExchange.c (ptw32_InterlockExchange): New function. (PTW32_INTERLOCKED_EXCHANGE): Sets up macro to use inlined ptw32_InterlockedExchange. * implement.h (PTW32_INTERLOCKED_EXCHANGE): Set default to InterlockedExchange(). * Makefile: Building using /Ob2 so that asm sections within inline functions are inlined. 2004-10-08 Ross Johnson * pthread_mutex_destroy.c (pthread_mutex_destroy): Critical Section element is no longer required. * pthread_mutex_init.c (pthread_mutex_init): Likewise. * pthread_mutex_lock.c (pthread_mutex_lock): New algorithm following Drepper's paper at http://people.redhat.com/drepper/futex.pdf, but using the existing semaphore in place of the futex described in the paper. Idea suggested by Alexander Terekhov - see: http://sources.redhat.com/ml/pthreads-win32/2003/msg00108.html * pthread_mutex_timedlock.c pthread_mutex_timedlock(): Similarly. * pthread_mutex_trylock.c (pthread_mutex_trylock): Similarly. * pthread_mutex_unlock.c (pthread_mutex_unlock): Similarly. * pthread_barrier_wait.c (pthread_barrier_wait): Use inlined version of InterlockedCompareExchange() if possible - determined at build-time. * pthread_spin_destroy.c pthread_spin_destroy(): Likewise. * pthread_spin_lock.c pthread_spin_lock():Likewise. * pthread_spin_trylock.c (pthread_spin_trylock):Likewise. * pthread_spin_unlock.c (pthread_spin_unlock):Likewise. * ptw32_InterlockedCompareExchange.c: Sets up macro for inlined use. * implement.h (pthread_mutex_t_): Remove Critical Section element. (PTW32_INTERLOCKED_COMPARE_EXCHANGE): Set to default non-inlined version of InterlockedCompareExchange(). * private.c: Include ptw32_InterlockedCompareExchange.c first for inlining. * GNUmakefile: Add commandline option to use inlined InterlockedCompareExchange(). * Makefile: Likewise. 2004-09-27 Ross Johnson * pthread_mutex_lock.c (pthread_mutex_lock): Separate PTHREAD_MUTEX_NORMAL logic since we do not need to keep or check some state required by other mutex types; do not check mutex pointer arg for validity - leave this to the system since we are only checking for NULL pointers. This should improve speed of NORMAL mutexes and marginally improve speed of other type. * pthread_mutex_trylock.c (pthread_mutex_trylock): Likewise. * pthread_mutex_unlock.c (pthread_mutex_unlock): Likewise; also avoid entering the critical section for the no-waiters case, with approx. 30% reduction in lock/unlock overhead for this case. * pthread_mutex_timedlock.c (pthread_mutex_timedlock): Likewise; also no longer keeps mutex if post-timeout second attempt succeeds - this will assist applications that wish to impose strict lock deadlines, rather than simply to escape from frozen locks. 2004-09-09 Tristan Savatier * pthread.h (struct pthread_once_t_): Qualify the 'done' element as 'volatile'. * pthread_once.c: Concerned about possible race condition, specifically on MPU systems re concurrent access to multibyte types. [Maintainer's note: the race condition is harmless on SPU systems and only a problem on MPU systems if concurrent access results in an exception (presumably generated by a hardware interrupt). There are other instances of similar harmless race conditions that have not been identified as issues.] 2004-09-09 Ross Johnson * pthread.h: Declare additional types as volatile. 2004-08-27 Ross Johnson * pthread_barrier_wait.c (pthread_barrier_wait): Remove excessive code by substituting the internal non-cancelable version of sem_wait (ptw32_semwait). 2004-08-25 Ross Johnson * pthread_join.c (pthread_join): Rewrite and re-order the conditional tests in an attempt to improve efficiency and remove a race condition. 2004-08-23 Ross Johnson * create.c (pthread_create): Don't create a thread if the thread id pointer location (first arg) is inaccessible. A memory protection fault will result if the thread id arg isn't an accessible location. This is consistent with GNU/Linux but different to Solaris or MKS (and possibly others), which accept NULL as meaning 'don't return the created thread's ID'. Applications that run using pthreads-win32 will run on all other POSIX threads implementations, at least w.r.t. this feature. It was decided not to copy the Solaris et al behaviour because, although it would have simplified some application porting (but only from Solaris to Windows), the feature is not technically necessary, and the alternative segfault behaviour helps avoid buggy application code. 2004-07-01 Anuj Goyal * builddmc.bat: New; Windows bat file to build the library. * config.h (__DMC__): Support for Digital Mars compiler. * create.c (__DMC__): Likewise. * pthread_exit.c (__DMC__): Likewise. * pthread_join.c (__DMC__): Likewise. * ptw32_threadDestroy.c (__DMC__): Likewise. * ptw32_threadStart.c (__DMC__): Likewise. * ptw32_throw.c (__DMC__): Likewise. 2004-06-29 Anuj Goyal * pthread.h (__DMC__): Initial support for Digital Mars compiler. 2004-06-29 Will Bryant * README.Borland: New; description of Borland changes. * Bmakefile: New makefile for the Borland make utility. * ptw32_InterlockedCompareExchange.c: Add Borland compatible asm code. 2004-06-26 Jason Bard * pthread.h (HAVE_STRUCT_TIMESPEC): If undefined, define it to avoid timespec struct redefined errors elsewhere in an application. 2004-06-21 Ross Johnson * pthread.h (PTHREAD_RECURSIVE_MUTEX_INITIALIZER): Mutex initialiser added for compatibility with Linux threads and others; currently not included in SUSV3. * pthread.h (PTHREAD_ERRORCHECK_MUTEX_INITIALIZER): Likewise. * pthread.h (PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP): Likewise. * pthread.h (PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP): Likewise. * ptw32_mutex_check_need_init.c (ptw32_mutex_check_need_init): Add new initialisers. * pthread_mutex_lock.c (pthread_mutex_lock): Check for new initialisers. * pthread_mutex_trylock.c (pthread_mutex_trylock): Likewise. * pthread_mutex_timedlock.c (pthread_mutex_timedlock): Likewise. * pthread_mutex_unlock.c (pthread_mutex_unlock): Likewise. * pthread_mutex_destroy.c (pthread_mutex_destroy): Likewise. 2004-05-20 Ross Johnson * README.NONPORTABLE: Document pthread_win32_test_features_np(). * FAQ: Update various answers. 2004-05-19 Ross Johnson * Makefile: Don't define _WIN32_WINNT on compiler command line. * GNUmakefile: Likewise. 2004-05-16 Ross Johnson * pthread_cancel.c (pthread_cancel): Adapted to use auto-detected QueueUserAPCEx features at run-time. (ptw32_RegisterCancelation): Drop in replacement for QueueUserAPCEx() if it can't be used. Provides older style non-preemptive async cancelation. * pthread_win32_attach_detach_np.c (pthread_win32_attach_np): Auto-detect quserex.dll and the availability of alertdrv.sys; initialise and close on process attach/detach. * global.c (ptw32_register_cancelation): Pointer to either QueueUserAPCEx() or ptw32_RegisterCancelation() depending on availability. QueueUserAPCEx makes pre-emptive async cancelation possible. * implement.h: Add definitions and prototypes related to QueueUserAPC. 2004-05-16 Panagiotis E. Hadjidoukas * QueueUserAPCEx (separate contributed package): Provides preemptive APC feature. * pthread_cancel.c (pthread_cancel): Initial integration of QueueUserAPCEx into pthreads-win32 to provide true pre-emptive async cancelation of threads, including blocked threads. 2004-05-06 Makoto Kato * pthread.h (DWORD_PTR): Define typedef for older MSVC. * pthread_cancel.c (AMD64): Add architecture specific Context register. * ptw32_getprocessors.c: Use correct types (DWORD_PTR) for mask variables. 2004-04-06 P. van Bruggen * ptw32_threadDestroy.c: Destroy threadLock mutex to close a memory leak. 2004-02-13 Gustav Hallberg * pthread_equal.c: Remove redundant equality logic. 2003-12-10 Philippe Di Cristo * sem_timedwait.c (sem_timedwait): Fix timeout calculations. 2003-10-20 Alexander Terekhov * pthread_mutex_timedlock.c (ptw32_semwait): Move to individual module. * ptw32_semwait.c: New module. * pthread_cond_wait.c (ptw32_cond_wait_cleanup): Replace cancelable sem_wait() call with non-cancelable ptw32_semwait() call. * pthread.c (private.c): Re-order for inlining. GNU C warned that function ptw32_semwait() was defined 'inline' after it was called. * pthread_cond_signal.c (ptw32_cond_unblock): Likewise. * pthread_delay_np.c: Disable Watcom warning with comment. * *.c (process.h): Remove include from .c files. This is conditionally included by the common project include files. 2003-10-20 James Ewing * ptw32_getprocessors.c: Some Win32 environments don't have GetProcessAffinityMask(), so always return CPU count = 1 for them. * config.h (NEED_PROCESSOR_AFFINITY_MASK): Define for WinCE. 2003-10-15 Ross Johnson * Re-indented all .c files using default GNU style to remove assorted editor ugliness (used GNU indent utility in default style). 2003-10-15 Alex Blanco * sem_init.c (sem_init): Would call CreateSemaphore even if the sema struct calloc failed; was not freeing calloced memory if either CreateSemaphore or CreateEvent failed. 2003-10-14 Ross Johnson * pthread.h: Add Watcom compiler compatibility. Esssentially just add the cdecl attribute to all exposed function prototypes so that Watcom generates function call code compatible with non-Watcom built libraries. By default, Watcom uses registers to pass function args if possible rather than pushing to stack. * semaphore.h: Likewise. * sched.h: Likewise. * pthread_cond_wait.c (ptw32_cond_wait_cleanup): Define with cdecl attribute for Watcom compatibility. This routine is called via pthread_cleanup_push so it had to match function arg definition. * Wmakefile: New makefile for Watcom builds. 2003-09-14 Ross Johnson * pthread_setschedparam.c (pthread_setschedparam): Attempt to map all priority levels between max and min (as returned by sched_get_priority_min/max) to reasonable Win32 priority levels - i.e. levels between THREAD_PRIORITY_LOWEST/IDLE to THREAD_PRIORITY_LOWEST and between THREAD_PRIORITY_HIGHEST/TIME_CRITICAL to THREAD_PRIORITY_HIGHEST while others remain unchanged; record specified thread priority level for return by pthread_getschedparam. Note that, previously, specified levels not matching Win32 priority levels would silently leave the current thread priority unaltered. * pthread_getschedparam.c (pthread_getschedparam): Return the priority level specified by the latest pthread_setschedparam or pthread_create rather than the actual running thread priority as returned by GetThreadPriority - as required by POSIX. I.e. temporary or adjusted actual priority levels are not returned by this routine. * pthread_create.c (pthread_create): For priority levels specified via pthread attributes, attempt to map all priority levels between max and min (as returned by sched_get_priority_min/max) to reasonable Win32 priority levels; record priority level given via attributes, or inherited from parent thread, for later return by pthread_getschedparam. * ptw32_new.c (ptw32_new): Initialise pthread_t_ sched_priority element. * pthread_self.c (pthread_self): Set newly created implicit POSIX thread sched_priority to Win32 thread's current actual priority. Temporarily altered priorities can't be avoided in this case. * implement.h (struct pthread_t_): Add new sched_priority element. 2003-09-12 Ross Johnson * sched_get_priority_min.c (sched_get_priority_min): On error should return -1 with errno set. * sched_get_priority_max.c (sched_get_priority_max): Likewise. 2003-09-03 Ross Johnson * w32_cancelableWait.c (ptw32_cancelable_wait): Allow cancelation of implicit POSIX threads as well. 2003-09-02 Ross Johnson * pthread_win32_attach_detach_np.c (pthread_win32_thread_detach_np): Add comment. * pthread_exit.c (pthread_exit): Fix to recycle the POSIX thread handle in addition to calling user TSD destructors. Move the implicit POSIX thread exit handling to ptw32_throw to centralise the logic. * ptw32_throw.c (ptw32_throw): Implicit POSIX threads have no point to jump or throw to, so cleanup and exit the thread here in this case. For processes using the C runtime, the exit code will be set to the POSIX reason for the throw (i.e. PTHREAD_CANCEL or the value given to pthread_exit). Note that pthread_exit() already had similar logic, which has been moved to here. * ptw32_threadDestroy.c (ptw32_threadDestroy): Don't close the Win32 handle of implicit POSIX threads - expect this to be done by Win32? 2003-09-01 Ross Johnson * pthread_self.c (pthread_self): The newly aquired pthread_t must be assigned to the reuse stack, not freed, if the routine fails somehow. 2003-08-13 Ross Johnson * pthread_getschedparam.c (pthread_getschedparam): An invalid thread ID parameter was returning an incorrect error value; now uses a more exhaustive check for validity. * pthread_setschedparam.c (pthread_setschedparam): Likewise. * pthread_join.c (pthread_join): Now uses a more exhaustive check for validity. * pthread_detach.c (pthread_detach): Likewise. * pthread_cancel.c (pthread_cancel): Likewise. * ptw32_threadDestroy.c (ptw32_threadDestroy): pthread_t structs are never freed - push them onto a stack for reuse. * ptw32_new.c (ptw32_new): Check for reusable pthread_t before dynamically allocating new memory for the struct. * pthread_kill.c (pthread_kill): New file; new routine; takes only a zero signal arg so that applications can check the thread arg for validity; checks that the underlying Win32 thread HANDLE is valid. * pthread.h (pthread_kill): Add prototype. * ptw32_reuse.c (ptw32_threadReusePop): New file; new routine; pop a pthread_t off the reuse stack. pthread_t_ structs that have been destroyed, i.e. have exited detached or have been joined, are cleaned up and put onto a reuse stack. Consequently, thread IDs are no longer freed once calloced. The library will attempt to get a struct off this stack before asking the system to alloc new memory when creating threads. The stack is guarded by a global mutex. (ptw32_threadReusePush): New routine; push a pthread_t onto the reuse stack. * implement.h (ptw32_threadReusePush): Add new prototype. (ptw32_threadReusePop): Likewise. (pthread_t): Add new element. * ptw32_processTerminate.c (ptw32_processTerminate): Delete the thread reuse lock; free all thread ID structs on the thread reuse stack. * ptw32_processInitialize.c (ptw32_processInitialize): Initialise the thread reuse lock. 2003-07-19 Ross Johnson * GNUmakefile: modified to work under MsysDTK environment. * pthread_spin_lock.c (pthread_spin_lock): Check for NULL arg. * pthread_spin_unlock.c (pthread_spin_unlock): Likewise. * pthread_spin_trylock.c (pthread_spin_trylock): Likewise; fix incorrect pointer value if lock is dynamically initialised by this function. * sem_init.c (sem_init): Initialise sem_t value to quell compiler warning. * sem_destroy.c (sem_destroy): Likewise. * ptw32_threadStart.c (non-MSVC code sections): Include rather than old-style ; fix all std:: namespace entities such as std::terminate_handler instances and associated methods. * ptw32_callUserDestroyRoutines.c (non-MSVC code sections): Likewise. 2003-06-24 Piet van Bruggen * pthread_spin_destroy.c (pthread_spin_destroy): Was not freeing the spinlock struct. 2003-06-22 Nicolas Barry * pthread_mutex_destroy.c (pthread_mutex_destroy): When called with a recursive mutex that was locked by the current thread, the function was failing with a success return code. 2003-05-15 Steven Reddie * pthread_win32_attach_detach_np.c (pthread_win32_process_detach_np): NULLify ptw32_selfThreadKey after the thread is destroyed, otherwise destructors calling pthreads routines might resurrect it again, creating memory leaks. Call the underlying Win32 Tls routine directly rather than pthread_setspecific(). (pthread_win32_thread_detach_np): Likewise. 2003-05-14 Viv * pthread.dsp: Change /MT compile flag to /MD. 2003-03-04 Alexander Terekhov * pthread_mutex_timedlock.c (pthread_mutex_timedlock): Fix failure to set ownership of mutex on second grab after abstime timeout. - bug reported by Robert Strycek 2002-12-17 Thomas Pfaff * pthread_mutex_lock.c (ptw32_semwait): New static routine to provide a non-cancelable sem_wait() function. This is consistent with the way that pthread_mutex_timedlock.c does it. (pthread_mutex_lock): Use ptw32_semwait() instead of sem_wait(). 2002-12-11 Thomas Pfaff * pthread_mutex_trylock.c: Should return EBUSY rather than EDEADLK. * pthread_mutex_destroy.c: Remove redundant ownership test (the trylock call does this for us); do not destroy a recursively locked mutex. 2002-09-20 Michael Johnson * pthread_cond_destroy.c (pthread_cond_destroy): When two different threads exist, and one is attempting to destroy a condition variable while the other is attempting to initialize a condition variable that was created with PTHREAD_COND_INITIALIZER, a deadlock can occur. Shrink the ptw32_cond_list_lock critical section to fix it. 2002-07-31 Ross Johnson * ptw32_threadStart.c (ptw32_threadStart): Thread cancelLock destruction moved to ptw32_threadDestroy(). * ptw32_threadDestroy.c (ptw32_threadDestroy): Destroy the thread's cancelLock. Moved here from ptw32_threadStart.c to cleanup implicit threads as well. 2002-07-30 Alexander Terekhov * pthread_cond_wait.c (ptw32_cond_wait_cleanup): Remove code designed to avoid/prevent spurious wakeup problems. It is believed that the sem_timedwait() call is consuming a CV signal that it shouldn't and this is breaking the avoidance logic. 2002-07-30 Ross Johnson * sem_timedwait.c (sem_timedwait): Tighten checks for unreasonable abstime values - that would result in unexpected timeout values. * w32_CancelableWait.c (ptw32_cancelable_wait): Tighten up return value checking and add comments. 2002-06-08 Ross Johnson * sem_getvalue.c (sem_getvalue): Now returns a value for the NEED_SEM version (i.e. earlier versions of WinCE). 2002-06-04 Rob Fanner * sem_getvalue.c (sem_getvalue): The Johnson M. Hart approach didn't work - we are forced to take an intrusive approach. We try to decrement the sema and then immediately release it again to get the value. There is a small probability that this may block other threads, but only momentarily. 2002-06-03 Ross Johnson * sem_init.c (sem_init): Initialise Win32 semaphores to _POSIX_SEM_VALUE_MAX (which this implementation defines in pthread.h) so that sem_getvalue() can use the trick described in the comments in sem_getvalue(). * pthread.h (_POSIX_SEM_VALUE_MAX): Defined. (_POSIX_SEM_NSEMS_MAX): Defined - not used but may be useful for source code portability. 2002-06-03 Rob Fanner * sem_getvalue.c (sem_getvalue): Did not work on NT. Use approach suggested by Johnson M. Hart in his book "Win32 System Programming". 2002-02-28 Ross Johnson * errno.c: Compiler directive was incorrectly including code. * pthread.h: Conditionally added some #defines from config.h needed when not building the library. e.g. NEED_ERRNO, NEED_SEM. (PTW32_DLLPORT): Now only defined if _DLL defined. (_errno): Compiler directive was incorrectly including prototype. * sched.h: Conditionally added some #defines from config.h needed when not building the library. * semaphore.h: Replace an instance of NEED_SEM that should have been NEED_ERRNO. This change currently has nil effect. * GNUmakefile: Correct some recent changes. * Makefile: Add rule to generate pre-processor output. 2002-02-23 Ross Johnson * pthread_rwlock_timedrdlock.c: New - untested. * pthread_rwlock_timedwrlock.c: New - untested. * Testsuite passed (except known MSVC++ problems) * pthread_cond_destroy.c: Expand the time change critical section to solve deadlock problem. * pthread.c: Add all remaining C modules. * pthread.h: Use dllexport/dllimport attributes on functions to avoid using pthread.def. * sched.h: Likewise. * semaphore.h: Likewise. * GNUmakefile: Add new targets for single translation unit build to maximise inlining potential; generate pthread.def automatically. * Makefile: Likewise, but no longer uses pthread.def. 2002-02-20 Ross Johnson * pthread_cond_destroy.c (pthread_cond_destroy): Enter the time change critical section earlier. 2002-02-17 Ross Johnson * nonportable.c (pthread_delay_np): Make a true cancelation point. Deferred cancels will interrupt the wait. 2002-02-07 Ross Johnson Reduced name space pollution. ----------------------------- When the appropriate symbols are defined, the headers will restrict the definitions of new names. In particular, it must be possible to NOT include the header and related definitions with some combination of symbol definitions. Secondly, it should be possible that additional definitions should be limited to POSIX compliant symbols by the definition of appropriate symbols. * pthread.h: POSIX conditionals. * sched.h: POSIX conditionals. * semaphore.h: POSIX conditionals. * semaphore.c: Included . (sem_init): Changed magic 0x7FFFFFFFL to INT_MAX. (sem_getvalue): Trial version. Reduce executable size. ----------------------- When linking with the static library, only those routines actually called, either directly or indirectly should be included. [Gcc has the -ffunction-segments option to do this but MSVC doesn't have this feature as far as I can determine. Other compilers are undetermined as well. - rpj] * semaphore.c: All routines are now in separate compilation units; This file is used to congregate the separate modules for potential inline optimisation and backward build compatibility. * sem_close.c: Separated routine from semaphore.c. * ptw32_decrease_semaphore.c: Likewise. * sem_destroy.c: Likewise. * sem_getvalue.c: Likewise. * ptw32_increase_semaphore.c: Likewise. * sem_init.c: Likewise. * sem_open.c: Likewise. * sem_post.c: Likewise. * sem_post_multiple.c: Likewise. * sem_timedwait.c: Likewise. * sem_trywait.c: Likewise. * sem_unlink.c: Likewise. * sem_wait.c: Likewise. 2002-02-04 Ross Johnson The following extends the idea above to the rest of pthreads-win32 - rpj * attr.c: All routines are now in separate compilation units; This file is used to congregate the separate modules for potential inline optimisation and backward build compatibility. * pthread_attr_destroy.c: Separated routine from attr.c. * pthread_attr_getdetachstate.c: Likewise. * pthread_attr_getscope.c: Likewise. * pthread_attr_getstackaddr.c: Likewise. * pthread_attr_getstacksize.c: Likewise. * pthread_attr_init.c: Likewise. * pthread_attr_is_attr.c: Likewise. * pthread_attr_setdetachstate.c: Likewise. * pthread_attr_setscope.c: Likewise. * pthread_attr_setstackaddr.c: Likewise. * pthread_attr_setstacksize.c: Likewise. * pthread.c: Agregation of agregate modules for super-inlineability. 2002-02-02 Ross Johnson * cancel.c: Rearranged some code and introduced checks to disable cancelation at the start of a thread's cancelation run to prevent double cancelation. The main problem arises if a thread is canceling and then receives a subsequent async cancel request. * private.c: Likewise. * condvar.c: Place pragmas around cleanup_push/pop to turn off inline optimisation (/Obn where n>0 - MSVC only). Various optimisation switches in MSVC turn this on, which interferes with the way that cleanup handlers are run in C++ EH and SEH code. Application code compiled with inline optimisation must also wrap cleanup_push/pop blocks with the pragmas, e.g. #pragma inline_depth(0) pthread_cleanup_push(...) ... pthread_cleanup_pop(...) #pragma inline_depth(8) * rwlock.c: Likewise. * mutex.c: Remove attempts to inline some functions. * signal.c: Modify misleading comment. 2002-02-01 Ross Johnson * semaphore.c (sem_trywait): Fix missing errno return for systems that define NEED_SEM (e.g. early WinCE). * mutex.c (pthread_mutex_timedlock): Return ENOTSUP for systems that define NEED_SEM since they don't have sem_trywait(). 2002-01-27 Ross Johnson * mutex.c (pthread_mutex_timedlock): New function suggested by Alexander Terekhov. The logic required to implement this properly came from Alexander, with some collaboration with Thomas Pfaff. (pthread_mutex_unlock): Wrap the waiters check and sema post in a critical section to prevent a race with pthread_mutex_timedlock. (ptw32_timed_semwait): New function; returns a special result if the absolute timeout parameter represents a time already passed when called; used by pthread_mutex_timedwait(). Have deliberately not reused the name "ptw32_sem_timedwait" because they are not the same routine. * condvar.c (ptw32_cond_timedwait): Use the new sem_timedwait() instead of ptw32_sem_timedwait(), which now has a different function. See previous. * implement.h: Remove prototype for ptw32_sem_timedwait. See next. (pthread_mutex_t_): Add critical section element for access to lock_idx during mutex post-timeout processing. * semaphore.h (sem_timedwait): See next. * semaphore.c (sem_timedwait): See next. * private.c (ptw32_sem_timedwait): Move to semaphore.c and rename as sem_timedwait(). 2002-01-18 Ross Johnson * sync.c (pthread_join): Was getting the exit code from the calling thread rather than the joined thread if defined(__MINGW32__) && !defined(__MSVCRT__). 2002-01-15 Ross Johnson * pthread.h: Unless the build explicitly defines __CLEANUP_SEH, __CLEANUP_CXX, or __CLEANUP_C, then the build defaults to __CLEANUP_C style cleanup. This style uses setjmp/longjmp in the cancelation and thread exit implementations and therefore won't do stack unwinding if linked to applications that have it (e.g. C++ apps). This is currently consistent with most/all commercial Unix POSIX threads implementations. * spin.c (pthread_spin_init): Edit renamed function call. * nonportable.c (pthread_num_processors_np): New. (pthread_getprocessors_np): Renamed to ptw32_getprocessors and moved to private.c. * private.c (pthread_getprocessors): Moved here from nonportable.c. * pthread.def (pthread_getprocessors_np): Removed from export list. * rwlock.c (pthread_rwlockattr_init): New. (pthread_rwlockattr_destroy): New. (pthread_rwlockattr_getpshared): New. (pthread_rwlockattr_setpshared): New. 2002-01-14 Ross Johnson * attr.c (pthread_attr_setscope): Fix struct pointer indirection error introduced 2002-01-04. (pthread_attr_getscope): Likewise. 2002-01-12 Ross Johnson * pthread.dsp (SOURCE): Add missing source files. 2002-01-08 Ross Johnson * mutex.c (pthread_mutex_trylock): use ptw32_interlocked_compare_exchange function pointer rather than ptw32_InterlockedCompareExchange() directly to retain portability to non-iX86 processors, e.g. WinCE etc. The pointer will point to the native OS version of InterlockedCompareExchange() if the OS supports it (see ChangeLog entry of 2001-10-17). 2002-01-07 Thomas Pfaff , Alexander Terekhov * mutex.c (pthread_mutex_init): Remove critical section calls. (pthread_mutex_destroy): Likewise. (pthread_mutex_unlock): Likewise. (pthread_mutex_trylock): Likewise; uses ptw32_InterlockedCompareExchange() to avoid need for critical section; library is no longer i386 compatible; recursive mutexes now increment the lock count rather than return EBUSY; errorcheck mutexes return EDEADLCK rather than EBUSY. This behaviour is consistent with the Solaris pthreads implementation. * implement.h (pthread_mutex_t_): Remove critical section element - no longer needed. 2002-01-04 Ross Johnson * attr.c (pthread_attr_setscope): Add more error checking and actually store the scope value even though it's not really necessary. (pthread_attr_getscope): Return stored value. * implement.h (pthread_attr_t_): Add new scope element. * ANNOUNCE: Fix out of date comment next to pthread_attr_setscope in conformance section. 2001-12-21 Alexander Terekhov * mutex.c (pthread_mutex_lock): Decrementing lock_idx was not thread-safe. (pthread_mutex_trylock): Likewise. 2001-10-26 prionx@juno.com * semaphore.c (sem_init): Fix typo and missing bracket in conditionally compiled code. Only older versions of WinCE require this code, hence it doesn't normally get tested; somehow when sem_t reverted to an opaque struct the calloc NULL check was left in the conditionally included section. (sem_destroy): Likewise, the calloced sem_t wasn't being freed. 2001-10-25 Ross Johnson * GNUmakefile (libwsock32): Add to linker flags for WSAGetLastError() and WSASetLastError(). * Makefile (wsock32.lib): Likewise. * create.c: Minor mostly inert changes. * implement.h (PTW32_MAX): Move into here and renamed from sched.h. (PTW32_MIN): Likewise. * GNUmakefile (TEST_ICE): Define if testing internal implementation of InterlockedCompareExchange. * Makefile (TEST_ICE): Likewise. * private.c (TEST_ICE): Likewise. 2001-10-24 Ross Johnson * attr.c (pthread_attr_setstacksize): Quell warning from LCC by conditionally compiling the stacksize validity check. LCC correctly warns that the condition (stacksize < PTHREAD_STACK_MIN) is suspicious because STACK_MIN is 0 and stacksize is of type size_t (or unsigned int). 2001-10-17 Ross Johnson * barrier.c: Move _LONG and _LPLONG defines into implement.h; rename to PTW32_INTERLOCKED_LONG and PTW32_INTERLOCKED_LPLONG respectively. * spin.c: Likewise; ptw32_interlocked_compare_exchange used in place of InterlockedCompareExchange directly. * global.c (ptw32_interlocked_compare_exchange): Add prototype for this new routine pointer to be used when InterlockedCompareExchange isn't supported by Windows. * nonportable.c (pthread_win32_process_attach_np): Check for support of InterlockedCompareExchange in kernel32 and assign its address to ptw32_interlocked_compare_exchange if it exists, or our own ix86 specific implementation ptw32_InterlockedCompareExchange. *private.c (ptw32_InterlockedCompareExchange): An implementation of InterlockedCompareExchange() which is specific to ix86; written directly in assembler for either MSVC or GNU C; needed because Windows 95 doesn't support InterlockedCompareExchange(). * sched.c (sched_get_priority_min): Extend to return THREAD_PRIORITY_IDLE. (sched_get_priority_max): Extend to return THREAD_PRIORITY_CRITICAL. 2001-10-15 Ross Johnson * spin.c (pthread_spin_lock): PTHREAD_SPINLOCK_INITIALIZER was causing a program fault. (pthread_spin_init): Could have alloced memory without freeing under some error conditions. * mutex.c (pthread_mutex_init): Move memory allocation of mutex struct after checking for PROCESS_SHARED. 2001-10-12 Ross Johnson * spin.c (pthread_spin_unlock): Was not returning EPERM if the spinlock was not locked, for multi CPU machines. 2001-10-08 Ross Johnson * spin.c (pthread_spin_trylock): Was not returning EBUSY for multi CPU machines. 2001-08-24 Ross Johnson * condvar.c (pthread_cond_destroy): Remove cv element that is no longer used. * implement.h: Likewise. 2001-08-23 Alexander Terekhov * condvar.c (pthread_cond_destroy): fix bug with respect to deadlock in the case of concurrent _destroy/_unblock; a condition variable can be destroyed immediately after all the threads that are blocked on it are awakened. 2001-08-23 Phil Frisbie, Jr. * tsd.c (pthread_getspecific): Preserve the last winsock error [from WSAGetLastError()]. 2001-07-18 Scott McCaskill * mutex.c (pthread_mutexattr_init): Return ENOMEM immediately and don't dereference the NULL pointer if calloc fails. (pthread_mutexattr_getpshared): Don't dereference a pointer that is possibly NULL. * barrier.c (pthread_barrierattr_init): Likewise (pthread_barrierattr_getpshared): Don't dereference a pointer that is possibly NULL. * condvar.c (pthread_condattr_getpshared): Don't dereference a pointer that is possibly NULL. 2001-07-15 Ross Johnson * rwlock.c (pthread_rwlock_wrlock): Is allowed to be a cancelation point; re-enable deferred cancelability around the CV call. 2001-07-10 Ross Johnson * barrier.c: Still more revamping. The exclusive access mutex isn't really needed so it has been removed and replaced by an InterlockedDecrement(). nSerial has been removed. iStep is now dual-purpose. The process shared attribute is now stored in the barrier struct. * implement.h (pthread_barrier_t_): Lost some/gained one elements. * private.c (ptw32_threadStart): Removed some comments. 2001-07-10 Ross Johnson * barrier.c: Revamped to fix the race condition. Two alternating semaphores are used instead of the PulseEvent. Also improved overall throughput by returning PTHREAD_BARRIER_SERIAL_THREAD to the first waking thread. * implement.h (pthread_barrier_t_): Revamped. 2001-07-09 Ross Johnson * barrier.c: Fix several bugs in all routines. Now passes tests/barrier5.c which is fairly rigorous. There is still a non-optimal work-around for a race condition between the barrier breeched event signal and event wait. Basically the last (signalling) thread to hit the barrier yields to allow any other threads, which may have lost the race, to complete. 2001-07-07 Ross Johnson * barrier.c: Changed synchronisation mechanism to a Win32 manual reset Event and use PulseEvent to signal waiting threads. If the implementation continued to use a semaphore it would require a second semaphore and some management to use them alternately as barriers. A single semaphore allows threads to cascade from one barrier through the next, leaving some threads blocked at the first. * implement.h (pthread_barrier_t_): As per above. * general: Made a number of other routines inlinable. 2001-07-07 Ross Johnson * spin.c: Revamped and working; included static initialiser. Now beta level. * barrier.c: Likewise. * condvar.c: Macro constant change; inline auto init routine. * mutex.c: Likewise. * rwlock.c: Likewise. * private.c: Add support for spinlock initialiser. * global.c: Likewise. * implement.h: Likewise. * pthread.h (PTHREAD_SPINLOCK_INITIALIZER): Fix typo. 2001-07-05 Ross Johnson * barrier.c: Remove static initialisation - irrelevent for this object. * pthread.h (PTHREAD_BARRIER_INITIALIZER): Removed. * rwlock.c (pthread_rwlock_wrlock): This routine is not a cancelation point - disable deferred cancelation around call to pthread_cond_wait(). 2001-07-05 Ross Johnson * spin.c: New module implementing spin locks. * barrier.c: New module implementing barriers. * pthread.h (_POSIX_SPIN_LOCKS): defined. (_POSIX_BARRIERS): Defined. (pthread_spin_*): Defined. (pthread_barrier*): Defined. (PTHREAD_BARRIER_SERIAL_THREAD): Defined. * implement.h (pthread_spinlock_t_): Defined. (pthread_barrier_t_): Defined. (pthread_barrierattr_t_): Defined. * mutex.c (pthread_mutex_lock): Return with the error if an auto-initialiser initialisation fails. * nonportable.c (pthread_getprocessors_np): New; gets the number of available processors for the current process. 2001-07-03 Ross Johnson * pthread.h (_POSIX_READER_WRITER_LOCKS): Define it if not already defined. 2001-07-01 Alexander Terekhov * condvar.c: Fixed lost signal bug reported by Timur Aydin (taydin@snet.net). [RPJ (me) didn't translate the original algorithm correctly.] * semaphore.c: Added sem_post_multiple; this is a useful routine, but it doesn't appear to be standard. For now it's not an exported function. 2001-06-25 Ross Johnson * create.c (pthread_create): Add priority inheritance attributes. * mutex.c (pthread_mutex_lock): Remove some overhead for PTHREAD_MUTEX_NORMAL mutex types. Specifically, avoid calling pthread_self() and pthread_equal() to check/set the mutex owner. Introduce a new pseudo owner for this type. Test results suggest increases in speed of up to 90% for non-blocking locks. This is the default type of mutex used internally by other synchronising objects, ie. condition variables and read-write locks. The test rwlock7.c shows about a 30-35% speed increase over snapshot 2001-06-06. The price of this is that the application developer must ensure correct behaviour, or explicitly set the mutex to a safer type such as PTHREAD_MUTEX_ERRORCHECK. For example, PTHREAD_MUTEX_NORMAL (or PTHREAD_MUTEX_DEFAULT) type mutexes will not return an error if a thread which is not the owner calls pthread_mutex_unlock. The call will succeed in unlocking the mutex if it is currently locked, but a subsequent unlock by the true owner will then fail with EPERM. This is however consistent with some other implementations. (pthread_mutex_unlock): Likewise. (pthread_mutex_trylock): Likewise. (pthread_mutex_destroy): Likewise. * attr.c (pthread_attr_init): PTHREAD_EXPLICIT_SCHED is the default inheritance attribute; THREAD_PRIORITY_NORMAL is the default priority for new threads. * sched.c (pthread_attr_setschedpolicy): Added routine. (pthread_attr_getschedpolicy): Added routine. (pthread_attr_setinheritsched): Added routine. (pthread_attr_getinheritsched): Added routine. * pthread.h (sched_rr_set_interval): Added as a macro; returns -1 with errno set to ENOSYS. 2001-06-23 Ross Johnson *sched.c (pthread_attr_setschedparam): Add priority range check. (sched_setscheduler): New function; checks for a valid pid and policy; checks for permission to set information in the target process; expects pid to be a Win32 process ID, not a process handle; the only scheduler policy allowed is SCHED_OTHER. (sched_getscheduler): Likewise, but checks for permission to query. * pthread.h (SCHED_*): Moved to sched.h as defined in the POSIX standard. * sched.h (SCHED_*): Moved from pthread.h. (pid_t): Defined if necessary. (sched_setscheduler): Defined. (sched_getscheduler): Defined. * pthread.def (sched_setscheduler): Exported. (sched_getscheduler): Likewise. 2001-06-23 Ralf Brese * create.c (pthread_create): Set thread priority from thread attributes. 2001-06-18 Ross Johnson * Made organisational-only changes to UWIN additions. * dll.c (dllMain): Moved UWIN process attach code to pthread_win32_process_attach_np(); moved instance of pthread_count to global.c. * global.c (pthread_count): Moved from dll.c. * nonportable.c (pthread_win32_process_attach_np): Moved _UWIN code to here from dll.c. * implement.h (pthread_count): Define extern int. * create.c (pthread_count): Remove extern int. * private.c (pthread_count): Likewise. * exit.c (pthread_count): Likewise. 2001-06-18 David Korn * dll.c: Added changes necessary to work with UWIN. * create.c: Likewise. * pthread.h: Likewise. * misc.c: Likewise. * exit.c: Likewise. * private.c: Likewise. * implement.h: Likewise. There is some room at the start of struct pthread_t_ to implement the signal semantics in UWIN's posix.dll although this is not yet complete. * Nmakefile: Compatible with UWIN's Nmake utility. * Nmakefile.tests: Likewise - for running the tests. 2001-06-08 Ross Johnson * semaphore.h (sem_t): Fixed for compile and test. * implement.h (sem_t_): Likewise. * semaphore.c: Likewise. * private.c (ptw32_sem_timedwait): Updated to use new opaque sem_t. 2001-06-06 Ross Johnson * semaphore.h (sem_t): Is now an opaque pointer; moved actual definition to implement.h. * implement.h (sem_t_): Move here from semaphore.h; was the definition of sem_t. * semaphore.c: Wherever necessary, changed use of sem from that of a pointer to a pointer-pointer; added extra checks for a valid sem_t; NULL sem_t when it is destroyed; added extra checks when creating and destroying sem_t elements in the NEED_SEM code branches; changed from using a pthread_mutex_t ((*sem)->mutex) to CRITICAL_SECTION ((*sem)->sem_lock_cs) in NEED_SEM branches for access serialisation. 2001-06-06 Ross Johnson * mutex.c (pthread_mutexattr_init): Remove ptw32_mutex_default_kind. 2001-06-05 Ross Johnson * nonportable.c (pthread_mutex_setdefaultkind_np): Remove - should not have been included in the first place. (pthread_mutex_getdefaultkind_np): Likewise. * global.c (ptw32_mutex_default_kind): Likewise. * mutex.c (pthread_mutex_init): Remove use of ptw32_mutex_default_kind. * pthread.h (pthread_mutex_setdefaultkind_np): Likewise. (pthread_mutex_getdefaultkind_np): Likewise. * pthread.def (pthread_mutexattr_setkind_np): Added. (pthread_mutexattr_getkind_np): Likewise. * README: Many changes that should have gone in before the last snapshot. * README.NONPORTABLE: New - referred to by ANNOUNCE but never created; documents the non-portable routines included in the library - moved from README with new routines added. * ANNOUNCE (pthread_mutexattr_setkind_np): Added to compliance list. (pthread_mutexattr_getkind_np): Likewise. 2001-06-04 Ross Johnson * condvar.c: Add original description of the algorithm as developed by Terekhov and Thomas, plus reference to README.CV. 2001-06-03 Alexander Terekhov , Louis Thomas * condvar.c (pthread_cond_init): Completely revamped. (pthread_cond_destroy): Likewise. (ptw32_cond_wait_cleanup): Likewise. (ptw32_cond_timedwait): Likewise. (ptw32_cond_unblock): New general signaling routine. (pthread_cond_signal): Now calls ptw32_cond_unblock. (pthread_cond_broadcast): Likewise. * implement.h (pthread_cond_t_): Revamped. * README.CV: New; explanation of the above changes. 2001-05-30 Ross Johnson * pthread.h (rand_r): Fake using _seed argument to quell compiler warning (compiler should optimise this away later). * GNUmakefile (OPT): Leave symbolic information out of the library and increase optimisation level - for smaller faster prebuilt dlls. 2001-05-29 Milan Gardian * Makefile: fix typo. * pthreads.h: Fix problems with stdcall/cdecl conventions, in particular remove the need for PT_STDCALL everywhere; remove warning supression. * (errno): Fix the longstanding "inconsistent dll linkage" problem with errno; now also works with /MD debugging libs - warnings emerged when compiling pthreads library with /MD (or /MDd) compiler switch, instead of /MT (or /MTd) (i.e. when compiling pthreads using Multithreaded DLL CRT instead of Multithreaded statically linked CRT). * create.c (pthread_create): Likewise; fix typo. * private.c (ptw32_threadStart): Eliminate use of terminate() which doesn't throw exceptions. * Remove unnecessary #includes from a number of modules - [I had to #include malloc.h in implement.h for gcc - rpj]. 2001-05-29 Thomas Pfaff * pthread.h (PTHREAD_MUTEX_DEFAULT): New; equivalent to PTHREAD_MUTEX_DEFAULT_NP. * (PTHREAD_MUTEX_NORMAL): Similarly. * (PTHREAD_MUTEX_ERRORCHECK): Similarly. * (PTHREAD_MUTEX_RECURSIVE): Similarly. * (pthread_mutex_setdefaultkind_np): New; Linux compatibility stub for pthread_mutexattr_settype. * (pthread_mutexattr_getkind_np): New; Linux compatibility stub for pthread_mutexattr_gettype. * mutex.c (pthread_mutexattr_settype): New; allow the following types of mutex: PTHREAD_MUTEX_DEFAULT_NP PTHREAD_MUTEX_NORMAL_NP PTHREAD_MUTEX_ERRORCHECK_NP PTHREAD_MUTEX_RECURSIVE_NP * Note that PTHREAD_MUTEX_DEFAULT is equivalent to PTHREAD_MUTEX_NORMAL - ie. mutexes should no longer be recursive by default, and a thread will deadlock if it tries to relock a mutex it already owns. This is inline with other pthreads implementations. * (pthread_mutex_lock): Process the lock request according to the mutex type. * (pthread_mutex_init): Eliminate use of Win32 mutexes as the basis of POSIX mutexes - instead, a combination of one critical section and one semaphore are used in conjunction with Win32 Interlocked* routines. * (pthread_mutex_destroy): Likewise. * (pthread_mutex_lock): Likewise. * (pthread_mutex_trylock): Likewise. * (pthread_mutex_unlock): Likewise. * Use longjmp/setjmp to implement cancelation when building the library using a C compiler which doesn't support exceptions, e.g. gcc -x c (note that gcc -x c++ uses exceptions). * Also fixed some of the same typos and eliminated PT_STDCALL as Milan Gardian's patches above. 2001-02-07 Alexander Terekhov * rwlock.c: Revamped. * implement.h (pthread_rwlock_t_): Redefined. This implementation does not have reader/writer starvation problem. Rwlock attempts to behave more like a normal mutex with races and scheduling policy determining who is more important; It also supports recursive locking, has less synchronization overhead (no broadcasts at all, readers are not blocked on any condition variable) and seem to be faster than the current implementation [W98 appears to be approximately 15 percent faster at least - on top of speed increase from Thomas Pfaff's changes to mutex.c - rpj]. 2000-12-29 Ross Johnson * Makefile: Back-out "for" loops which don't work. * GNUmakefile: Remove the fake.a target; add the "realclean" target; don't remove built libs under the "clean" target. * config.h: Add a guard against multiple inclusion. * semaphore.h: Add some defines from config.h to make semaphore.h independent of config.h when building apps. * pthread.h (_errno): Back-out previous fix until we know how to fix it properly. * implement.h (lockCount): Add missing element to pthread_mutex_t_. * sync.c (pthread_join): Spelling fix in comment. * private.c (ptw32_threadStart): Reset original termination function (C++). (ptw32_threadStart): Cleanup detached threads early in case the library is statically linked. (ptw32_callUserDestroyRoutines): Remove [SEH] __try block from destructor call so that unhandled exceptions will be passed through to the system; call terminate() from [C++] try block for the same reason. * tsd.c (pthread_getspecific): Add comment. * mutex.c (pthread_mutex_init): Initialise new elements in pthread_mutex_t. (pthread_mutex_unlock): Invert "pthread_equal()" test. 2000-12-28 Ross Johnson * semaphore.c (mode_t): Use ifndef HAVE_MODE_T to include definition. * config.h.in (HAVE_MODE_T): Added. (_UWIN): Start adding defines for the UWIN package. * private.c (ptw32_threadStart): Unhandled exceptions are now passed through to the system to deal with. This is consistent with normal Windows behaviour. C++ applications may use set_terminate() to override the default behaviour which is to call ptw32_terminate(). Ptw32_terminate() cleans up some POSIX thread stuff before calling the system default function which calls abort(). The users termination function should conform to standard C++ semantics which is to not return. It should exit the thread (call pthread_exit()) or exit the application. * private.c (ptw32_terminate): Added as the default set_terminate() function. It calls the system default function after cleaning up some POSIX thread stuff. * implement.h (ptw32_try_enter_critical_section): Move declaration. * global.c (ptw32_try_enter_critical_section): Moved from dll.c. * dll.c: Move process and thread attach/detach code into functions in nonportable.c. * nonportable.c (pthread_win32_process_attach_np): Process attach code from dll.c is now available to static linked applications. * nonportable.c (pthread_win32_process_detach_np): Likewise. * nonportable.c (pthread_win32_thread_attach_np): Likewise. * nonportable.c (pthread_win32_thread_detach_np): Likewise. * pthread.h: Add new non-portable prototypes for static linked applications. * GNUmakefile (OPT): Increase optimisation flag and remove debug info flag. * pthread.def: Add new non-portable exports for static linked applications. 2000-12-11 Ross Johnson * FAQ: Update Answer 6 re getting a fully working Mingw32 built library. 2000-10-10 Steven Reddie * misc.c (pthread_self): Restore Win32 "last error" cleared by TlsGetValue() call in pthread_getspecific() 2000-09-20 Arthur Kantor * mutex.c (pthread_mutex_lock): Record the owner of the mutex. This requires also keeping count of recursive locks ourselves rather than leaving it to Win32 since we need to know when to NULL the thread owner when the mutex is unlocked. (pthread_mutex_trylock): Likewise. (pthread_mutex_unlock): Check that the calling thread owns the mutex, decrement the recursive lock count, and NULL the owner if zero. Return EPERM if the mutex is owned by another thread. * implement.h (pthread_mutex_t_): Add ownerThread and lockCount members. 2000-09-13 Jef Gearhart * mutex.c (pthread_mutex_init): Call TryEnterCriticalSection through the pointer rather than directly so that the dll can load on Windows versions that can't resolve the function, eg. Windows 95 2000-09-09 Ross Johnson * pthread.h (ctime_r): Fix arg. 2000-09-08 Ross Johnson * GNUmakefile(_WIN32_WINNT=0x400): Define in CFLAGS; doesn't seem to be needed though. * cancel.c (pthread_cancel): Must get "self" through calling pthread_self() which will ensure a POSIX thread struct is built for non-POSIX threads; return an error if this fails - Ollie Leahy (pthread_setcancelstate): Likewise. (pthread_setcanceltype): Likewise. * misc.c (ptw32_cancelable_wait): Likewise. * private.c (ptw32_tkAssocCreate): Remove unused #if 0 wrapped code. * pthread.h (ptw32_get_exception_services_code): Needed to be forward declared unconditionally. 2000-09-06 Ross Johnson * cancel.c (pthread_cancel): If called from the main thread "self" would be NULL; get "self" via pthread_self() instead of directly from TLS so that an implicit pthread object is created. * misc.c (pthread_equal): Strengthen test for NULLs. 2000-09-02 Ross Johnson * condvar.c (ptw32_cond_wait_cleanup): Ensure that all waking threads check if they are the last, and notify the broadcaster if so - even if an error occurs in the waiter. * semaphore.c (_decrease_semaphore): Should be a call to ptw32_decrease_semaphore. (_increase_semaphore): Should be a call to ptw32_increase_semaphore. * misc.c (ptw32_cancelable_wait): Renamed from CancelableWait. * rwlock.c (_rwlock_check*): Renamed to ptw32_rwlock_check*. * mutex.c (_mutex_check*): Renamed to ptw32_mutex_check*. * condvar.c (cond_timed*): Renamed to ptw32_cond_timed*. (_cond_check*): Renamed to ptw32_cond_check*. (cond_wait_cleanup*): Rename to ptw32_cond_wait_cleanup*. (ptw32_cond_timedwait): Add comments. 2000-08-22 Ross Johnson * private.c (ptw32_throw): Fix exception test; move exceptionInformation declaration. * tsd.c (pthread_key_create): newkey wrongly declared. * pthread.h: Fix comment block. 2000-08-18 Ross Johnson * mutex.c (pthread_mutex_destroy): Check that the mutex isn't held; invalidate the mutex as early as possible to avoid contention; not perfect - FIXME! * rwlock.c (pthread_rwlock_init): Remove redundant assignment to "rw". (pthread_rwlock_destroy): Invalidate the rwlock before freeing up any of it's resources - to avoid contention. * private.c (ptw32_tkAssocCreate): Change assoc->lock to use a dynamically initialised mutex - only consumes a W32 mutex or critical section when first used, not before. * mutex.c (pthread_mutex_init): Remove redundant assignment to "mx". (pthread_mutexattr_destroy): Set attribute to NULL before freeing it's memory - to avoid contention. * implement.h (PTW32_EPS_CANCEL/PTW32_EPS_EXIT): Must be defined for all compilers - used as generic exception selectors by ptw32_throw(). * Several: Fix typos from scripted edit session yesterday. * nonportable.c (pthread_mutexattr_setforcecs_np): Moved this function from mutex.c. (pthread_getw32threadhandle_np): New function to return the win32 thread handle that the POSIX thread is using. * mutex.c (pthread_mutexattr_setforcecs_np): Moved to new file "nonportable.c". * pthread.h (PTW32_BUILD): Only redefine __except and catch compiler keywords if we aren't building the library (ie. PTW32_BUILD is not defined) - this is safer than defining and then undefining if not building the library. * implement.h: Remove __except and catch undefines. * Makefile (CFLAGS): Define PTW32_BUILD. * GNUmakefile (CFLAGS): Define PTW32_BUILD. * All appropriate: Change Pthread_exception* to ptw32_exception* to be consistent with internal identifier naming. * private.c (ptw32_throw): New function to provide a generic exception throw for all internal exceptions and EH schemes. (ptw32_threadStart): pthread_exit() value is now returned via the thread structure exitStatus element. * exit.c (pthread_exit): pthread_exit() value is now returned via the thread structure exitStatus element. * cancel.c (ptw32_cancel_self): Now uses ptw32_throw. (pthread_setcancelstate): Ditto. (pthread_setcanceltype): Ditto. (pthread_testcancel): Ditto. (pthread_cancel): Ditto. * misc.c (CancelableWait): Ditto. * exit.c (pthread_exit): Ditto. * All applicable: Change PTW32_ prefix to PTW32_ prefix to remove leading underscores from private library identifiers. 2000-08-17 Ross Johnson * All applicable: Change _pthread_ prefix to ptw32_ prefix to remove leading underscores from private library identifiers (single and double leading underscores are reserved in the ANSI C standard for compiler implementations). * tsd.c (pthread_create_key): Initialise temporary key before returning it's address to avoid race conditions. 2000-08-13 Ross Johnson * errno.c: Add _MD precompile condition; thus far had no effect when using /MD compile option but I thnk it should be there. * exit.c: Add __cplusplus to various #if lines; was compiling SEH code even when VC++ had C++ compile options. * private.c: ditto. * create.c (pthread_create): Add PT_STDCALL macro to function pointer arg in _beginthread(). * pthread.h: PT_STDCALL really does need to be defined in both this and impliment.h; don't set it to __cdecl - this macro is only used to extend function pointer casting for functions that will be passed as parameters. (~PThreadCleanup): add cast and group expression. (_errno): Add _MD compile conditional. (PtW32NoCatchWarn): Change pragma message. * implement.h: Move and change PT_STDCALL define. * need_errno.h: Add _MD to compilation conditional. * GNUmakefile: Substantial rewrite for new naming convention; set for nil optimisation (turn it up when we have a working library build; add target "fake.a" to build a libpthreadw32.a from the VC++ built DLL pthreadVCE.dll. * pthread.def (LIBRARY): Don't specify in the .def file - it is specified on the linker command line since we now use the same .def file for variously named .dlls. * Makefile: Substantial rewrite for new naming convention; default nmake target only issues a help message; run nmake with specific target corresponding to the EH scheme being used. * README: Update information; add naming convention explanation. * ANNOUNCE: Update information. 2000-08-12 Ross Johnson * pthread.h: Add compile-time message when using MSC_VER compiler and C++ EH to warn application programmers to use PtW32Catch instead of catch(...) if they want cancelation and pthread_exit to work. * implement.h: Remove #include ; we use our own local semaphore.h. 2000-08-10 Ross Johnson * cleanup.c (pthread_pop_cleanup): Remove _pthread prefix from __except and catch keywords; implement.h now simply undefines ptw32__except and ptw32_catch if defined; VC++ was not textually substituting ptw32_catch etc back to catch as it was redefined; the reason for using the prefixed version was to make it clear that it was not using the pthread.h redefined catch keyword. * private.c (ptw32_threadStart): Ditto. (ptw32_callUserDestroyRoutines): Ditto. * implement.h (ptw32__except): Remove #define. (ptw32_catch): Remove #define. * GNUmakefile (pthread.a): New target to build libpthread32.a from pthread.dll using dlltool. * buildlib.bat: Duplicate cl commands with args to build C++ EH version of pthread.dll; use of .bat files is redundant now that nmake compatible Makefile is included; used as a kludge only now. * Makefile: Localise some macros and fix up the clean: target to extend it and work properly. * CONTRIBUTORS: Add contributors. * ANNOUNCE: Updated. * README: Updated. 2000-08-06 Ross Johnson * pthread.h: Remove #warning - VC++ doesn't accept it. 2000-08-05 Ross Johnson * pthread.h (PtW32CatchAll): Add macro. When compiling applications using VC++ with C++ EH rather than SEH 'PtW32CatchAll' must be used in place of any 'catch( ... )' if the application wants pthread cancelation or pthread_exit() to work. 2000-08-03 Ross Johnson * pthread.h: Add a base class ptw32_exception for library internal exceptions and change the "catch" re-define macro to use it. 2000-08-02 Ross Johnson * GNUmakefile (CFLAGS): Add -mthreads. Add new targets to generate cpp and asm output. * sync.c (pthread_join): Remove dead code. 2000-07-25 Tristan Savatier * sched.c (sched_get_priority_max): Handle different WinCE and Win32 priority values together. (sched_get_priority_min): Ditto. 2000-07-25 Ross Johnson * create.c (pthread_create): Force new threads to wait until pthread_create has the new thread's handle; we also retain a local copy of the handle for internal use until pthread_create returns. * private.c (ptw32_threadStart): Initialise ei[]. (ptw32_threadStart): When beginthread is used to start the thread, force waiting until the creator thread had the thread handle. * cancel.c (ptw32_cancel_thread): Include context switch code for defined(_X86_) environments in addition to _M_IX86. * rwlock.c (pthread_rwlock_destroy): Assignment changed to avoid compiler warning. * private.c (ptw32_get_exception_services_code): Cast NULL return value to avoid compiler warning. * cleanup.c (pthread_pop_cleanup): Initialise "cleanup" variable to avoid compiler warnings. * misc.c (ptw32_new): Change "new" variable to "t" to avoid confusion with the C++ keyword of the same name. * condvar.c (cond_wait_cleanup): Initialise lastWaiter variable. (cond_timedwait): Remove unused local variables. to avoid compiler warnings. * dll.c (dllMain): Remove 2000-07-21 change - problem appears to be in pthread_create(). 2000-07-22 Ross Johnson * tsd.c (pthread_key_create): If a destructor was given and the pthread_mutex_init failed, then would try to reference a NULL pointer (*key); eliminate this section of code by using a dynamically initialised mutex (PTHREAD_MUTEX_INITIALIZER). * tsd.c (pthread_setspecific): Return an error if unable to set the value; simplify cryptic conditional. * tsd.c (pthread_key_delete): Locking threadsLock relied on mutex_lock returning an error if the key has no destructor. ThreadsLock is only initialised if the key has a destructor. Making this mutex a static could reduce the number of mutexes used by an application since it is actually created only at first use and it's often destroyed soon after. 2000-07-22 Ross Johnson * FAQ: Added Q5 and Q6. 2000-07-21 David Baggett * dll.c: Include resource leakage work-around. This is a partial FIXME which doesn't stop all leakage. The real problem needs to be found and fixed. 2000-07-21 Ross Johnson * create.c (pthread_create): Set threadH to 0 (zero) everywhere. Some assignments were using NULL. Maybe it should be NULL everywhere - need to check. (I know they are nearly always the same thing - but not by definition.) * misc.c (pthread_self): Try to catch NULL thread handles at the point where they might be generated, even though they should always be valid at this point. * tsd.c (pthread_setspecific): return an error value if pthread_self() returns NULL. * sync.c (pthread_join): return an error value if pthread_self() returns NULL. * signal.c (pthread_sigmask): return an error value if pthread_self() returns NULL. 2000-03-02 Ross Johnson * attr.c (pthread_attr_init): Set default stacksize to zero (0) rather than PTHREAD_STACK_MIN even though these are now the same. * pthread.h (PTHREAD_STACK_MIN): Lowered to 0. 2000-01-28 Ross Johnson * mutex.c (pthread_mutex_init): Free mutex if it has been alloced; if critical sections can be used instead of Win32 mutexes, test that the critical section works and return an error if not. 2000-01-07 Ross Johnson * cleanup.c (pthread_pop_cleanup): Include SEH code only if MSC is not compiling as C++. (pthread_push_cleanup): Include SEH code only if MSC is not compiling as C++. * pthread.h: Include SEH code only if MSC is not compiling as C++. * implement.h: Include SEH code only if MSC is not compiling as C++. * cancel.c (ptw32_cancel_thread): Add _M_IX86 check. (pthread_testcancel): Include SEH code only if MSC is not compiling as C++. (ptw32_cancel_self): Include SEH code only if MSC is not compiling as C++. 2000-01-06 Erik Hensema * Makefile: Remove inconsistencies in 'cl' args 2000-01-04 Ross Johnson * private.c (ptw32_get_exception_services_code): New; returns value of EXCEPTION_PTW32_SERVICES. (ptw32_processInitialize): Remove initialisation of ptw32_exception_services which is no longer needed. * pthread.h (ptw32_exception_services): Remove extern. (ptw32_get_exception_services_code): Add function prototype; use this to return EXCEPTION_PTW32_SERVICES value instead of using the ptw32_exception_services variable which I had trouble exporting through pthread.def. * global.c (ptw32_exception_services): Remove declaration. 1999-11-22 Ross Johnson * implement.h: Forward declare ptw32_new(); * misc.c (ptw32_new): New; alloc and initialise a new pthread_t. (pthread_self): New thread struct is generated by new routine ptw32_new(). * create.c (pthread_create): New thread struct is generated by new routine ptw32_new(). 1999-11-21 Ross Johnson * global.c (ptw32_exception_services): Declare new variable. * private.c (ptw32_threadStart): Destroy thread's cancelLock mutex; make 'catch' and '__except' usageimmune to redfinitions in pthread.h. (ptw32_processInitialize): Init new constant ptw32_exception_services. * create.c (pthread_create): Initialise thread's cancelLock mutex. * cleanup.c (pthread_pop_cleanup): Make 'catch' and '__except' usage immune to redfinition s in pthread.h. * private.c: Ditto. * pthread.h (catch): Redefine 'catch' so that C++ applications won't catch our internal exceptions. (__except): ditto for __except. * implement.h (ptw32_catch): Define internal version of 'catch' because 'catch' is redefined by pthread.h. (__except): ditto for __except. (struct pthread_t_): Add cancelLock mutex for async cancel safety. 1999-11-21 Jason Nye , Erik Hensema * cancel.c (ptw32_cancel_self): New; part of the async cancellation implementation. (ptw32_cancel_thread): Ditto; this function is X86 processor specific. (pthread_setcancelstate): Add check for pending async cancel request and cancel the calling thread if required; add async-cancel safety lock. (pthread_setcanceltype): Ditto. 1999-11-13 Erik Hensema * configure.in (AC_OUTPUT): Put generated output into GNUmakefile rather than Makefile. Makefile will become the MSC nmake compatible version 1999-11-13 John Bossom (John.Bossom@cognos.com> * misc.c (pthread_self): Add a note about GetCurrentThread returning a pseudo-handle 1999-11-10 Todd Owen * dll.c (dllMain): Free kernel32 ASAP. If TryEnterCriticalSection is not being used, then free the kernel32.dll handle now, rather than leaving it until DLL_PROCESS_DETACH. Note: this is not a pedantic exercise in freeing unused resources! It is a work-around for a bug in Windows 95 (see microsoft knowledge base article, Q187684) which does Bad Things when FreeLibrary is called within the DLL_PROCESS_DETACH code, in certain situations. Since w95 just happens to be a platform which does not provide TryEnterCriticalSection, the bug will be effortlessly avoided. 1999-11-10 Ross Johnson * sync.c (pthread_join): Make it a deferred cancelation point. * misc.c (pthread_self): Explicitly initialise implicitly created thread state to default values. 1999-11-05 Tristan Savatier * pthread.h (winsock.h): Include unconditionally. (ETIMEDOUT): Change fallback value to that defined by winsock.h. * general: Patched for portability to WinCE. The details are described in the file WinCE-PORT. Follow the instructions in README.WinCE to make the appropriate changes in config.h. 1999-10-30 Erik Hensema * create.c (pthread_create): Explicitly initialise thread state to default values. * cancel.c (pthread_setcancelstate): Check for NULL 'oldstate' for compatibility with Solaris pthreads; (pthread_setcanceltype): ditto: 1999-10-23 Erik Hensema * pthread.h (ctime_r): Fix incorrect argument "_tm" 1999-10-21 Aurelio Medina * pthread.h (_POSIX_THREADS): Only define it if it isn't already defined. Projects may need to define this on the CC command line under Win32 as it doesn't have unistd.h 1999-10-17 Ross Johnson * rwlock.c (pthread_rwlock_destroy): Add cast to remove compile warning. * condvar.c (pthread_cond_broadcast): Only release semaphores if there are waiting threads. 1999-10-15 Lorin Hochstein , Peter Slacik * condvar.c (cond_wait_cleanup): New static cleanup handler for cond_timedwait; (cond_timedwait): pthread_cleanup_push args changed; canceling a thread while it's in pthread_cond_wait will now decrement the waiters count and cleanup if it's the last waiter. 1999-10-15 Graham Dumpleton * condvar.c (cond_wait_cleanup): the last waiter will now reset the CV's wasBroadcast flag Thu Sep 16 1999 Ross Johnson * rwlock.c (pthread_rwlock_destroy): Add serialisation. (_rwlock_check_need_init): Check for detroyed rwlock. * rwlock.c: Check return codes from _rwlock_check_need_init(); modify comments; serialise access to rwlock objects during operations; rename rw_mutex to rw_lock. * implement.h: Rename rw_mutex to rw_lock. * mutex.c (pthread_mutex_destroy): Add serialisation. (_mutex_check_need_init): Check for detroyed mutex. * condvar.c (pthread_cond_destroy): Add serialisation. (_cond_check_need_init): Check for detroyed condvar. * mutex.c: Modify comments. * condvar.c: Modify comments. 1999-08-10 Aurelio Medina * implement.h (pthread_rwlock_t_): Add. * pthread.h (pthread_rwlock_t): Add. (PTHREAD_RWLOCK_INITIALIZER): Add. Add rwlock function prototypes. * rwlock.c: New module. * pthread.def: Add new rwlock functions. * private.c (ptw32_processInitialize): initialise ptw32_rwlock_test_init_lock critical section. * global.c (ptw32_rwlock_test_init_lock): Add. * mutex.c (pthread_mutex_destroy): Don't free mutex memory if mutex is PTHREAD_MUTEX_INITIALIZER and has not been initialised yet. 1999-08-08 Milan Gardian * mutex.c (pthread_mutex_destroy): Free mutex memory. 1999-08-22 Ross Johnson * exit.c (pthread_exit): Fix reference to potentially uninitialised pointer. 1999-08-21 Ross Johnson * private.c (ptw32_threadStart): Apply fix of 1999-08-19 this time to C++ and non-trapped C versions. Ommitted to do this the first time through. 1999-08-19 Ross Johnson * private.c (ptw32_threadStart): Return exit status from the application thread startup routine. - Milan Gardian 1999-08-18 John Bossom * exit.c (pthread_exit): Put status into pthread_t->exitStatus * private.c (ptw32_threadStart): Set pthread->exitStatus on exit of try{} block. * sync.c (pthread_join): use pthread_exitStatus value if the thread exit doesn't return a value (for Mingw32 CRTDLL which uses endthread instead of _endthreadex). Tue Aug 17 20:17:58 CDT 1999 Mumit Khan * create.c (pthread_create): Add CRTDLL suppport. * exit.c (pthread_exit): Likewise. * private.c (ptw32_threadStart): Likewise. (ptw32_threadDestroy): Likewise. * sync.c (pthread_join): Likewise. * tests/join1.c (main): Warn about partial support for CRTDLL. Tue Aug 17 20:00:08 1999 Mumit Khan * Makefile.in (LD): Delete entry point. * acconfig.h (STDCALL): Delete unused macro. * configure.in: Remove test for STDCALL. * config.h.in: Regenerate. * errno.c (_errno): Fix self type. * pthread.h (PT_STDCALL): Move from here to * implement.h (PT_STDCALL): here. (ptw32_threadStart): Fix prototype. * private.c (ptw32_threadStart): Likewise. 1999-08-14 Ross Johnson * exit.c (pthread_exit): Don't call pthread_self() but get thread handle directly from TSD for efficiency. 1999-08-12 Ross Johnson * private.c (ptw32_threadStart): ei[] only declared if _MSC_VER. * exit.c (pthread_exit): Check for implicitly created threads to avoid raising an unhandled exception. 1999-07-12 Peter Slacik * condvar.c (pthread_cond_destroy): Add critical section. (cond_timedwait): Add critical section; check for timeout waiting on semaphore. (pthread_cond_broadcast): Add critical section. 1999-07-09 Lorin Hochstein , John Bossom The problem was that cleanup handlers were not executed when pthread_exit() was called. * implement.h (pthread_t_): Add exceptionInformation element for C++ per-thread exception information. (general): Define and rename exceptions. 1999-07-09 Ross Johnson * misc.c (CancelableWait): PTW32_EPS_CANCEL (SEH) and ptw32_exception_cancel (C++) used to identify the exception. * cancel.c (pthread_testcancel): PTW32_EPS_CANCEL (SEH) and ptw32_exception_cancel (C++) used to identify the exception. * exit.c (pthread_exit): throw/raise an exception to return to ptw32_threadStart() to exit the thread. PTW32_EPS_EXIT (SEH) and ptw32_exception_exit (C++) used to identify the exception. * private.c (ptw32_threadStart): Add pthread_exit exception trap; clean up and exit the thread directly rather than via pthread_exit(). Sun May 30 00:25:02 1999 Ross Johnson * semaphore.h (mode_t): Conditionally typedef it. Fri May 28 13:33:05 1999 Mark E. Armstrong * condvar.c (pthread_cond_broadcast): Fix possible memory fault Thu May 27 13:08:46 1999 Peter Slacik * condvar.c (pthread_cond_broadcast): Fix logic bug Thu May 27 13:08:46 1999 Bossom, John * condvar.c (pthread_cond_broadcast): optimise sem_post loop Fri May 14 12:13:18 1999 Mike Russo * attr.c (pthread_attr_setdetachstate): Fix logic bug Sat May 8 09:42:30 1999 Ross Johnson * pthread.def (sem_open): Add. (sem_close): Add. (sem_unlink): Add. (sem_getvalue): Add. * FAQ (Question 3): Add. Thu Apr 8 01:16:23 1999 Ross Johnson * semaphore.c (sem_open): New function; returns an error (ENOSYS). (sem_close): ditto. (sem_unlink): ditto. (sem_getvalue): ditto. * semaphore.h (_POSIX_SEMAPHORES): define. Wed Apr 7 14:09:52 1999 Ross Johnson * errno.c (_REENTRANT || _MT): Invert condition. * pthread.h (_errno): Conditionally include prototype. Wed Apr 7 09:37:00 1999 Ross Johnson * *.c (comments): Remove individual attributions - these are documented sufficiently elsewhere. * implement.h (pthread.h): Remove extraneous include. Sun Apr 4 11:05:57 1999 Ross Johnson * sched.c (sched.h): Include. * sched.h: New file for POSIX 1b scheduling. * pthread.h: Move opaque structures to implement.h; move sched_* prototypes out and into sched.h. * implement.h: Add opaque structures from pthread.h. * sched.c (sched_yield): New function. * condvar.c (ptw32_sem_*): Rename to sem_*; except for ptw32_sem_timedwait which is an private function. Sat Apr 3 23:28:00 1999 Ross Johnson * Makefile.in (OBJS): Add errno.o. Fri Apr 2 11:08:50 1999 Ross Johnson * implement.h (ptw32_sem_*): Remove prototypes now defined in semaphore.h. * pthread.h (sempahore.h): Include. * semaphore.h: New file for POSIX 1b semaphores. * semaphore.c (ptw32_sem_timedwait): Moved to private.c. * pthread.h (ptw32_sem_t): Change to sem_t. * private.c (ptw32_sem_timedwait): Moved from semaphore.c; set errno on error. * pthread.h (pthread_t_): Add per-thread errno element. Fri Apr 2 11:08:50 1999 John Bossom * semaphore.c (ptw32_sem_*): Change to sem_*; these functions will be exported from the library; set errno on error. * errno.c (_errno): New file. New function. Fri Mar 26 14:11:45 1999 Tor Lillqvist * semaphore.c (ptw32_sem_timedwait): Check for negative milliseconds. Wed Mar 24 11:32:07 1999 John Bossom * misc.c (CancelableWait): Initialise exceptionInformation[2]. (pthread_self): Get a real Win32 thread handle for implicit threads. * cancel.c (pthread_testcancel): Initialise exceptionInformation[2]. * implement.h (SE_INFORMATION): Fix values. * private.c (ptw32_threadDestroy): Close the thread handle. Fri Mar 19 12:57:27 1999 Ross Johnson * cancel.c (comments): Update and cleanup. Fri Mar 19 09:12:59 1999 Ross Johnson * private.c (ptw32_threadStart): status returns PTHREAD_CANCELED. * pthread.h (PTHREAD_CANCELED): defined. Tue Mar 16 1999 Ross Johnson * all: Add GNU LGPL and Copyright and Warranty. Mon Mar 15 00:20:13 1999 Ross Johnson * condvar.c (pthread_cond_init): fix possible uninitialised use of cv. Sun Mar 14 21:01:59 1999 Ross Johnson * condvar.c (pthread_cond_destroy): don't do full cleanup if static initialised cv has never been used. (cond_timedwait): check result of auto-initialisation. Thu Mar 11 09:01:48 1999 Ross Johnson * pthread.h (pthread_mutex_t): revert to (pthread_mutex_t *); define a value to serve as PTHREAD_MUTEX_INITIALIZER. (pthread_mutex_t_): remove staticinit and valid elements. (pthread_cond_t): revert to (pthread_cond_t_ *); define a value to serve as PTHREAD_COND_INITIALIZER. (pthread_cond_t_): remove staticinit and valid elements. * mutex.c (pthread_mutex_t args): adjust indirection of references. (all functions): check for PTHREAD_MUTEX_INITIALIZER value; check for NULL (invalid). * condvar.c (pthread_cond_t args): adjust indirection of references. (all functions): check for PTHREAD_COND_INITIALIZER value; check for NULL (invalid). Wed Mar 10 17:18:12 1999 Ross Johnson * misc.c (CancelableWait): Undo changes from Mar 8 and 7. Mon Mar 8 11:18:59 1999 Ross Johnson * misc.c (CancelableWait): Ensure cancelEvent handle is the lowest indexed element in the handles array. Enhance test for abandoned objects. * pthread.h (PTHREAD_MUTEX_INITIALIZER): Trailing elements not initialised are set to zero by the compiler. This avoids the problem of initialising the opaque critical section element in it. (PTHREAD_COND_INITIALIZER): Ditto. * semaphore.c (ptw32_sem_timedwait): Check sem == NULL earlier. Sun Mar 7 12:31:14 1999 Ross Johnson * condvar.c (pthread_cond_init): set semaphore initial value to 0, not 1. cond_timedwait was returning signaled immediately. * misc.c (CancelableWait): Place the cancel event handle first in the handle table for WaitForMultipleObjects. This ensures that the cancel event is recognised and acted apon if both objects happen to be signaled together. * private.c (ptw32_cond_test_init_lock): Initialise and destroy. * implement.h (ptw32_cond_test_init_lock): Add extern. * global.c (ptw32_cond_test_init_lock): Add declaration. * condvar.c (pthread_cond_destroy): check for valid initialised CV; flag destroyed CVs as invalid. (pthread_cond_init): pthread_cond_t is no longer just a pointer. This is because PTHREAD_COND_INITIALIZER needs state info to reside in pthread_cond_t so that it can initialise on first use. Will work on making pthread_cond_t (and other objects like it) opaque again, if possible, later. (cond_timedwait): add check for statically initialisation of CV; initialise on first use. (pthread_cond_signal): check for valid CV. (pthread_cond_broadcast): check for valid CV. (_cond_check_need_init): Add. * pthread.h (PTHREAD_COND_INITIALIZER): Fix. (pthread_cond_t): no longer a pointer to pthread_cond_t_. (pthread_cond_t_): add 'staticinit' and 'valid' elements. Sat Mar 6 1999 Ross Johnson * implement.h: Undate comments. Sun Feb 21 1999 Ross Johnson * pthread.h (PTHREAD_MUTEX_INITIALIZER): missing braces around cs element initialiser. 1999-02-21 Ben Elliston * pthread.h (pthread_exit): The return type of this function is void, not int. * exit.c (pthread_exit): Do not return 0. Sat Feb 20 16:03:30 1999 Ross Johnson * dll.c (DLLMain): Expand TryEnterCriticalSection support test. * mutex.c (pthread_mutex_trylock): The check for ptw32_try_enter_critical_section == NULL should have been removed long ago. Fri Feb 19 16:03:30 1999 Ross Johnson * sync.c (pthread_join): Fix pthread_equal() test. * mutex.c (pthread_mutex_trylock): Check mutex != NULL before using it. Thu Feb 18 16:17:30 1999 Ross Johnson * misc.c (pthread_equal): Fix inverted result. * Makefile.in: Use libpthread32.a as the name of the DLL export library instead of pthread.lib. * condvar.c (pthread_cond_init): cv could have been used unitialised; initialise. * create.c (pthread_create): parms could have been used unitialised; initialise. * pthread.h (struct pthread_once_t_): Remove redefinition. Sat Feb 13 03:03:30 1999 Ross Johnson * pthread.h (struct pthread_once_t_): Replaced. * misc.c (pthread_once): Replace with John Bossom's version; has lighter weight serialisation; fixes problem of not holding competing threads until after the init_routine completes. Thu Feb 11 13:34:14 1999 Ross Johnson * misc.c (CancelableWait): Change C++ exception throw. * sync.c (pthread_join): Change FIXME comment - issue resolved. Wed Feb 10 12:49:11 1999 Ross Johnson * configure: Various temporary changes. - Kevin Ruland * README: Update. * pthread.def (pthread_attr_getstackaddr): uncomment (pthread_attr_setstackaddr): uncomment Fri Feb 5 13:42:30 1999 Ross Johnson * semaphore.c: Comment format changes. Thu Feb 4 10:07:28 1999 Ross Johnson * global.c: Remove ptw32_exception instantiation. * cancel.c (pthread_testcancel): Change C++ exception throw. * implement.h: Remove extern declaration. Wed Feb 3 13:04:44 1999 Ross Johnson * cleanup.c: Rename ptw32_*_cleanup() to pthread_*_cleanup(). * pthread.def: Ditto. * pthread.h: Ditto. * pthread.def (pthread_cleanup_push): Remove from export list; the function is defined as a macro under all compilers. (pthread_cleanup_pop): Ditto. * pthread.h: Remove #if defined(). Wed Feb 3 10:13:48 1999 Ross Johnson * sync.c (pthread_join): Check for NULL value_ptr arg; check for detached threads. Tue Feb 2 18:07:43 1999 Ross Johnson * implement.h: Add #include . Change sem_t to ptw32_sem_t. Tue Feb 2 18:07:43 1999 Kevin Ruland * signal.c (pthread_sigmask): Add and modify casts. Reverse LHS/RHS bitwise assignments. * pthread.h: Remove #include . (PTW32_ATTR_VALID): Add cast. (struct pthread_t_): Add sigmask element. * dll.c: Add "extern C" for DLLMain. (DllMain): Add cast. * create.c (pthread_create): Set sigmask in thread. * condvar.c: Remove #include. Change sem_* to ptw32_sem_*. * attr.c: Changed #include. * Makefile.in: Additional targets and changes to build the library as a DLL. Fri Jan 29 11:56:28 1999 Ross Johnson * Makefile.in (OBJS): Add semaphore.o to list. * semaphore.c (ptw32_sem_timedwait): Move from private.c. Rename sem_* to ptw32_sem_*. * pthread.h (pthread_cond_t): Change type of sem_t. _POSIX_SEMAPHORES no longer defined. * semaphore.h: Contents moved to implement.h. Removed from source tree. * implement.h: Add semaphore function prototypes and rename all functions to prepend 'ptw32_'. They are now private to the pthreads-win32 implementation. * private.c: Change #warning. Move ptw32_sem_timedwait() to semaphore.c. * cleanup.c: Change #warning. * misc.c: Remove #include * pthread.def: Cleanup CVS merge conflicts. * global.c: Ditto. * ChangeLog: Ditto. * cleanup.c: Ditto. Sun Jan 24 01:34:52 1999 Ross Johnson * semaphore.c (sem_wait): Remove second arg to pthreadCancelableWait() call. Sat Jan 23 17:36:40 1999 Ross Johnson * pthread.def: Add new functions to export list. * pthread.h (PTHREAD_MUTEX_AUTO_CS_NP): New. (PTHREAD_MUTEX_FORCE_CS_NP): New. * README: Updated. Fri Jan 22 14:31:59 1999 Ross Johnson * Makefile.in (CFLAGS): Remove -fhandle-exceptions. Not needed with egcs. Add -g for debugging. * create.c (pthread_create): Replace __stdcall with PT_STDCALL macro. This is a hack and must be fixed. * misc.c (CancelableWait): Remove redundant statement. * mutex.c (pthread_mutexattr_init): Cast calloc return value. * misc.c (CancelableWait): Add cast. (pthread_self): Add cast. * exit.c (pthread_exit): Add cast. * condvar.c (pthread_condattr_init): Cast calloc return value. * cleanup.c: Reorganise conditional compilation. * attr.c (pthread_attr_init): Remove unused 'result'. Cast malloc return value. * private.c (ptw32_callUserDestroyRoutines): Redo conditional compilation. * misc.c (CancelableWait): C++ version uses 'throw'. * cancel.c (pthread_testcancel): Ditto. * implement.h (class ptw32_exception): Define for C++. * pthread.h: Fix C, C++, and Win32 SEH condition compilation mayhem around pthread_cleanup_* defines. C++ version now uses John Bossom's cleanup handlers. (pthread_attr_t): Make 'valid' unsigned. Define '_timeb' as 'timeb' for Ming32. Define PT_STDCALL as nothing for Mingw32. May be temporary. * cancel.c (pthread_testcancel): Cast return value. Wed Jan 20 09:31:28 1999 Ross Johnson * pthread.h (pthread_mutexattr_t): Changed to a pointer. * mutex.c (pthread_mutex_init): Conditionally create Win32 mutex - from John Bossom's implementation. (pthread_mutex_destroy): Conditionally close Win32 mutex - from John Bossom's implementation. (pthread_mutexattr_init): Replaced by John Bossom's version. (pthread_mutexattr_destroy): Ditto. (pthread_mutexattr_getpshared): New function from John Bossom's implementation. (pthread_mutexattr_setpshared): New function from John Bossom's implementation. Tue Jan 19 18:27:42 1999 Ross Johnson * pthread.h (pthreadCancelableTimedWait): New prototype. (pthreadCancelableWait): Remove second argument. * misc.c (CancelableWait): New static function is pthreadCancelableWait() renamed. (pthreadCancelableWait): Now just calls CancelableWait() with INFINITE timeout. (pthreadCancelableTimedWait): Just calls CancelableWait() with passed in timeout. Tue Jan 19 18:27:42 1999 Scott Lightner * private.c (ptw32_sem_timedwait): 'abstime' arg really is absolute time. Calculate relative time to wait from current time before passing timeout to new routine pthreadCancelableTimedWait(). Tue Jan 19 10:27:39 1999 Ross Johnson * pthread.h (pthread_mutexattr_setforcecs_np): New prototype. * mutex.c (pthread_mutexattr_init): Init 'pshared' and 'forcecs' attributes to 0. (pthread_mutexattr_setforcecs_np): New function (not portable). * pthread.h (pthread_mutex_t): Add 'mutex' element. Set to NULL in PTHREAD_MUTEX_INITIALIZER. The pthread_mutex_*() routines will try to optimise performance by choosing either mutexes or critical sections as the basis for pthread mutexes for each indevidual mutex. (pthread_mutexattr_t_): Add 'forcecs' element. Some applications may choose to force use of critical sections if they know that:- the mutex is PROCESS_PRIVATE and, either the OS supports TryEnterCriticalSection() or pthread_mutex_trylock() will never be called on the mutex. This attribute will be setable via a non-portable routine. Note: We don't yet support PROCESS_SHARED mutexes, so the implementation as it stands will default to Win32 mutexes only if the OS doesn't support TryEnterCriticalSection. On Win9x, and early versions of NT 'forcecs' will need to be set in order to get critical section based mutexes. Sun Jan 17 12:01:26 1999 Ross Johnson * pthread.h (PTHREAD_MUTEX_INITIALIZER): Init new 'staticinit' value to '1' and existing 'valid' value to '1'. * global.c (ptw32_mutex_test_init_lock): Add. * implement.h (ptw32_mutex_test_init_lock.): Add extern. * private.c (ptw32_processInitialize): Init critical section for global lock used by _mutex_check_need_init(). (ptw32_processTerminate): Ditto (:s/Init/Destroy/). * dll.c (dllMain): Move call to FreeLibrary() so that it is only called once when the process detaches. * mutex.c (_mutex_check_need_init): New static function to test and init PTHREAD_MUTEX_INITIALIZER mutexes. Provides serialised access to the internal state of the uninitialised static mutex. Called from pthread_mutex_trylock() and pthread_mutex_lock() which do a quick unguarded test to check if _mutex_check_need_init() needs to be called. This is safe as the test is conservative and is repeated inside the guarded section of _mutex_check_need_init(). Thus in all calls except the first calls to lock static mutexes, the additional overhead to lock any mutex is a single memory fetch and test for zero. * pthread.h (pthread_mutex_t_): Add 'staticinit' member. Mutexes initialised by PTHREAD_MUTEX_INITIALIZER aren't really initialised until the first attempt to lock it. Using the 'valid' flag (which flags the mutex as destroyed or not) to record this information would be messy. It is possible for a statically initialised mutex such as this to be destroyed before ever being used. * mutex.c (pthread_mutex_trylock): Call _mutex_check_need_init() to test/init PTHREAD_MUTEX_INITIALIZER mutexes. (pthread_mutex_lock): Ditto. (pthread_mutex_unlock): Add check to ensure we don't try to unlock an unitialised static mutex. (pthread_mutex_destroy): Add check to ensure we don't try to delete a critical section that we never created. Allows us to destroy a static mutex that has never been locked (and hence initialised). (pthread_mutex_init): Set 'staticinit' flag to 0 for the new mutex. Sun Jan 17 12:01:26 1999 Ross Johnson * private.c (ptw32_sem_timedwait): Move from semaphore.c. * semaphore.c : Remove redundant #includes. (ptw32_sem_timedwait): Move to private.c. (sem_wait): Add missing abstime arg to pthreadCancelableWait() call. Fri Jan 15 23:38:05 1999 Ross Johnson * condvar.c (cond_timedwait): Remove comment. Fri Jan 15 15:41:28 1999 Ross Johnson * pthread.h: Add new 'abstime' arg to pthreadCancelableWait() prototype. * condvar.c (cond_timedwait): New generalised function called by both pthread_cond_wait() and pthread_cond_timedwait(). This is essentially pthread_cond_wait() renamed and modified to add the 'abstime' arg and call the new ptw32_sem_timedwait() instead of sem_wait(). (pthread_cond_wait): Now just calls the internal static function cond_timedwait() with an INFINITE wait. (pthread_cond_timedwait): Now implemented. Calls the internal static function cond_timedwait(). * implement.h (ptw32_sem_timedwait): New internal function prototype. * misc.c (pthreadCancelableWait): Added new 'abstime' argument to allow shorter than INFINITE wait. * semaphore.c (ptw32_sem_timedwait): New function for internal use. This is essentially sem_wait() modified to add the 'abstime' arg and call the modified (see above) pthreadCancelableWait(). Thu Jan 14 14:27:13 1999 Ross Johnson * cleanup.c: Correct _cplusplus to __cplusplus wherever used. * Makefile.in: Add CC=g++ and add -fhandle-exceptions to CFLAGS. The derived Makefile will compile all units of the package as C++ so that those which include try/catch exception handling should work properly. The package should compile ok if CC=gcc, however, exception handling will not be included and thus thread cancellation, for example, will not work. * cleanup.c (ptw32_pop_cleanup): Add #warning to compile this file as C++ if using a cygwin32 environment. Perhaps the whole package should be compiled using g++ under cygwin. * private.c (ptw32_threadStart): Change #error directive into #warning and bracket for __CYGWIN__ and derivative compilers. Wed Jan 13 09:34:52 1999 Ross Johnson * build.bat: Delete old binaries before compiling/linking. Tue Jan 12 09:58:38 1999 Tor Lillqvist * dll.c: The Microsoft compiler pragmas probably are more appropriately protected by _MSC_VER than by _WIN32. * pthread.h: Define ETIMEDOUT. This should be returned by pthread_cond_timedwait which is not implemented yet as of snapshot-1999-01-04-1305. It was implemented in the older version. The Microsoft compiler pragmas probably are more appropriately protected by _MSC_VER than by _WIN32. * pthread.def: pthread_mutex_destroy was missing from the def file * condvar.c (pthread_cond_broadcast): Ensure we only wait on threads if there were any waiting on the condition. I think pthread_cond_broadcast should do the WaitForSingleObject only if cv->waiters > 0? Otherwise it seems to hang, at least in the testg thread program from glib. Tue Jan 12 09:58:38 1999 Ross Johnson * condvar.c (pthread_cond_timedwait): Fix function description comments. * semaphore.c (sem_post): Correct typo in comment. Mon Jan 11 20:33:19 1999 Ross Johnson * pthread.h: Re-arrange conditional compile of pthread_cleanup-* macros. * cleanup.c (ptw32_push_cleanup): Provide conditional compile of cleanup->prev. 1999-01-11 Tor Lillqvist * condvar.c (pthread_cond_init): Invert logic when testing the return value from calloc(). Sat Jan 9 14:32:08 1999 Ross Johnson * implement.h: Compile-time switch for CYGWIN derived environments to use CreateThread instead of _beginthreadex. Ditto for ExitThread. Patch provided by Anders Norlander . Tue Jan 5 16:33:04 1999 Ross Johnson * cleanup.c (ptw32_pop_cleanup): Add C++ version of __try/__except block. Move trailing "}" out of #ifdef _WIN32 block left there by (rpj's) mistake. * private.c: Remove #include which is included by pthread.h. 1998-12-11 Ben Elliston * README: Update info about subscribing to the mailing list. Mon Jan 4 11:23:40 1999 Ross Johnson * all: No code changes, just cleanup. - remove #if 0 /* Pre Bossom */ enclosed code. - Remove some redundant #includes. * pthread.h: Update implemented/unimplemented routines list. * Tag the bossom merge branch getting ready to merge back to main trunk. Tue Dec 29 13:11:16 1998 Ross Johnson * implement.h: Move the following struct definitions to pthread.h: pthread_t_, pthread_attr_t_, pthread_mutex_t_, pthread_mutex_t_, pthread_mutexattr_t_, pthread_key_t_, pthread_cond_t_, pthread_condattr_t_, pthread_once_t_. * pthread.h: Add "_" prefix to pthread_push_cleanup and pthread_pop_cleanup internal routines, and associated struct and typedefs. * buildlib.bat: Add compile command for semaphore.c * pthread.def: Comment out pthread_atfork routine name. Now unimplemented. * tsd.c (pthread_setspecific): Rename tkAssocCreate to ptw32_tkAssocCreate. (pthread_key_delete): Rename tkAssocDestroy to ptw32_tkAssocDestroy. * sync.c (pthread_join): Rename threadDestroy to ptw32_threadDestroy * sched.c (is_attr): attr is now **attr (was *attr), so add extra NULL pointer test. (pthread_attr_setschedparam): Increase redirection for attr which is now a **. (pthread_attr_getschedparam): Ditto. (pthread_setschedparam): Change thread validation and rename "thread" Win32 thread Handle element name to match John Bossom's version. (pthread_getschedparam): Ditto. * private.c (ptw32_threadDestroy): Rename call to callUserDestroyRoutines() as ptw32_callUserDestroyRoutines() * misc.c: Add #include "implement.h". * dll.c: Remove defined(KLUDGE) wrapped code. * fork.c: Remove redefinition of ENOMEM. Remove pthread_atfork() and fork() with #if 0/#endif. * create.c (pthread_create): Rename threadStart and threadDestroy calls to ptw32_threadStart and ptw32_threadDestroy. * implement.h: Rename "detachedstate" to "detachstate". * attr.c: Rename "detachedstate" to "detachstate". Mon Dec 28 09:54:39 1998 John Bossom * semaphore.c: Initial version. * semaphore.h: Initial version. Mon Dec 28 09:54:39 1998 Ross Johnson * pthread.h (pthread_attr_t_): Change to *pthread_attr_t. Mon Dec 28 09:54:39 1998 John Bossom, Ben Elliston * attr.c (pthread_attr_setstacksize): Merge with John's version. (pthread_attr_getstacksize): Merge with John's version. (pthread_attr_setstackaddr): Merge with John's version. (pthread_attr_getstackaddr): Merge with John's version. (pthread_attr_init): Merge with John's version. (pthread_attr_destroy): Merge with John's version. (pthread_attr_getdetachstate): Merge with John's version. (pthread_attr_setdetachstate): Merge with John's version. (is_attr): attr is now **attr (was *attr), so add extra NULL pointer test. Mon Dec 28 09:54:39 1998 Ross Johnson * implement.h (pthread_attr_t_): Add and rename elements in JEB's version to correspond to original, so that it can be used with original attr routines. * pthread.h: Add #endif at end which was truncated in merging. Sun Dec 20 14:51:58 1998 Ross Johnson * misc.c (pthreadCancelableWait): New function by John Bossom. Non-standard but provides a hook that can be used to implement cancellation points in applications that use this library. * pthread.h (pthread_cleanup_pop): C++ (non-WIN32) version uses try/catch to emulate John Bossom's WIN32 __try/__finally behaviour. In the WIN32 version __finally block, add a test for AbnormalTermination otherwise cleanup is only run if the cleanup_pop execute arg is non-zero. Cancellation should cause the cleanup to run irrespective of the execute arg. * condvar.c (pthread_condattr_init): Replaced by John Bossom's version. (pthread_condattr_destroy): Replaced by John Bossom's version. (pthread_condattr_getpshared): Replaced by John Bossom's version. (pthread_condattr_setpshared): Replaced by John Bossom's version. (pthread_cond_init): Replaced by John Bossom's version. Fix comment (refered to mutex rather than condition variable). (pthread_cond_destroy): Replaced by John Bossom's version. (pthread_cond_wait): Replaced by John Bossom's version. (pthread_cond_timedwait): Replaced by John Bossom's version. (pthread_cond_signal): Replaced by John Bossom's version. (pthread_cond_broadcast): Replaced by John Bossom's version. Thu Dec 17 19:10:46 1998 Ross Johnson * tsd.c (pthread_key_create): Replaced by John Bossom's version. (pthread_key_delete): Replaced by John Bossom's version. (pthread_setspecific): Replaced by John Bossom's version. (pthread_getspecific): Replaced by John Bossom's version. Mon Dec 7 09:44:40 1998 John Bossom * cancel.c (pthread_setcancelstate): Replaced. (pthread_setcanceltype): Replaced. (pthread_testcancel): Replaced. (pthread_cancel): Replaced. * exit.c (pthread_exit): Replaced. * misc.c (pthread_self): Replaced. (pthread_equal): Replaced. * sync.c (pthread_detach): Replaced. (pthread_join): Replaced. * create.c (pthread_create): Replaced. * private.c (ptw32_processInitialize): New. (ptw32_processTerminate): New. (ptw32_threadStart): New. (ptw32_threadDestroy): New. (ptw32_cleanupStack): New. (ptw32_tkAssocCreate): New. (ptw32_tkAssocDestroy): New. (ptw32_callUserDestroyRoutines): New. * implement.h: Added non-API structures and declarations. * dll.c (PthreadsEntryPoint): Cast return value of GetProcAddress to resolve compile warning from MSVC. * dll.c (DLLmain): Replaced. * dll.c (PthreadsEntryPoint): Re-applied Anders Norlander's patch:- Initialize ptw32_try_enter_critical_section at startup and release kernel32 handle when DLL is being unloaded. Sun Dec 6 21:54:35 1998 Ross Johnson * buildlib.bat: Fix args to CL when building the .DLL * cleanup.c (ptw32_destructor_run_all): Fix TSD key management. This is a tidy-up before TSD and Thread management is completely replaced by John Bossom's code. * tsd.c (pthread_key_create): Fix TSD key management. * global.c (ptw32_key_virgin_next): Initialise. * build.bat: New DOS script to compile and link a pthreads app using Microsoft's CL compiler linker. * buildlib.bat: New DOS script to compile all the object files and create pthread.lib and pthread.dll using Microsoft's CL compiler linker. 1998-12-05 Anders Norlander * implement.h (ptw32_try_enter_critical_section): New extern * dll.c (ptw32_try_enter_critical_section): New pointer to TryEnterCriticalSection if it exists; otherwise NULL. * dll.c (PthreadsEntryPoint): Initialize ptw32_try_enter_critical_section at startup and release kernel32 handle when DLL is being unloaded. * mutex.c (pthread_mutex_trylock): Replaced check for NT with a check if ptw32_try_enter_critical_section is valid pointer to a function. Call ptw32_try_enter_critical_section instead of TryEnterCriticalSection to avoid errors on Win95. Thu Dec 3 13:32:00 1998 Ross Johnson * README: Correct cygwin32 compatibility statement. Sun Nov 15 21:24:06 1998 Ross Johnson * cleanup.c (ptw32_destructor_run_all): Declare missing void * arg. Fixup CVS merge conflicts. 1998-10-30 Ben Elliston * condvar.c (cond_wait): Fix semantic error. Test for equality instead of making an assignment. Fri Oct 30 15:15:50 1998 Ross Johnson * cleanup.c (ptw32_handler_push): Fixed bug appending new handler to list reported by Peter Slacik . (new_thread): Rename poorly named local variable to "new_handler". Sat Oct 24 18:34:59 1998 Ross Johnson * global.c: Add TSD key management array and index declarations. * implement.h: Ditto for externs. Fri Oct 23 00:08:09 1998 Ross Johnson * implement.h (PTW32_TSD_KEY_REUSE): Add enum. * private.c (ptw32_delete_thread): Add call to ptw32_destructor_run_all() to clean up the threads keys. * cleanup.c (ptw32_destructor_run_all): Check for no more dirty keys to run destructors on. Assume that the destructor call always succeeds and set the key value to NULL. Thu Oct 22 21:44:44 1998 Ross Johnson * tsd.c (pthread_setspecific): Add key management code. (pthread_key_create): Ditto. (pthread_key_delete): Ditto. * implement.h (struct ptw32_tsd_key): Add status member. * tsd.c: Add description of pthread_key_delete() from the standard as a comment. Fri Oct 16 17:38:47 1998 Ross Johnson * cleanup.c (ptw32_destructor_run_all): Fix and improve stepping through the key table. Thu Oct 15 14:05:01 1998 Ross Johnson * private.c (ptw32_new_thread): Remove init of destructorstack. No longer an element of pthread_t. * tsd.c (pthread_setspecific): Fix type declaration and cast. (pthread_getspecific): Ditto. (pthread_getspecific): Change error return value to NULL if key is not in use. Thu Oct 15 11:53:21 1998 Ross Johnson * global.c (ptw32_tsd_key_table): Fix declaration. * implement.h(ptw32_TSD_keys_TlsIndex): Add missing extern. (ptw32_tsd_mutex): Ditto. * create.c (ptw32_start_call): Fix "keys" array declaration. Add comment. * tsd.c (pthread_setspecific): Fix type declaration and cast. (pthread_getspecific): Ditto. * cleanup.c (ptw32_destructor_run_all): Declare missing loop counter. Wed Oct 14 21:09:24 1998 Ross Johnson * private.c (ptw32_new_thread): Increment ptw32_threads_count. (ptw32_delete_thread): Decrement ptw32_threads_count. Remove some comments. * exit.c (ptw32_exit): : Fix two pthread_mutex_lock() calls that should have been pthread_mutex_unlock() calls. (ptw32_vacuum): Remove call to ptw32_destructor_pop_all(). * create.c (pthread_create): Fix two pthread_mutex_lock() calls that should have been pthread_mutex_unlock() calls. * global.c (ptw32_tsd_mutex): Add mutex for TSD operations. * tsd.c (pthread_key_create): Add critical section. (pthread_setspecific): Ditto. (pthread_getspecific): Ditto. (pthread_key_delete): Ditto. * sync.c (pthread_join): Fix two pthread_mutex_lock() calls that should have been pthread_mutex_unlock() calls. Mon Oct 12 00:00:44 1998 Ross Johnson * implement.h (ptw32_tsd_key_table): New. * create.c (ptw32_start_call): Initialise per-thread TSD keys to NULL. * misc.c (pthread_once): Correct typo in comment. * implement.h (ptw32_destructor_push): Remove. (ptw32_destructor_pop): Remove. (ptw32_destructor_run_all): Rename from ptw32_destructor_pop_all. (PTW32_TSD_KEY_DELETED): Add enum. (PTW32_TSD_KEY_INUSE): Add enum. * cleanup.c (ptw32_destructor_push): Remove. (ptw32_destructor_pop): Remove. (ptw32_destructor_run_all): Totally revamped TSD. * dll.c (ptw32_TSD_keys_TlsIndex): Initialise. * tsd.c (pthread_setspecific): Totally revamped TSD. (pthread_getspecific): Ditto. (pthread_create): Ditto. (pthread_delete): Ditto. Sun Oct 11 22:44:55 1998 Ross Johnson * global.c (ptw32_tsd_key_table): Add new global. * implement.h (ptw32_tsd_key_t and struct ptw32_tsd_key): Add. (struct _pthread): Remove destructorstack. * cleanup.c (ptw32_destructor_run_all): Rename from ptw32_destructor_pop_all. The key destructor stack was made global rather than per-thread. No longer removes destructor nodes from the stack. Comments updated. 1998-10-06 Ben Elliston * condvar.c (cond_wait): Use POSIX, not Win32 mutex calls. (pthread_cond_broadcast): Likewise. (pthread_cond_signal): Likewise. 1998-10-05 Ben Elliston * pthread.def: Update. Some functions aren't available yet, others are macros in . * tests/join.c: Remove; useless. Mon Oct 5 14:25:08 1998 Ross Johnson * pthread.def: New file for building the DLL. 1998-10-05 Ben Elliston * misc.c (pthread_equal): Correct inverted logic bug. (pthread_once): Use the POSIX mutex primitives, not Win32. Remove irrelevant FIXME comment. * global.c (PTHREAD_MUTEX_INITIALIZER): Move to pthread.h. * pthread.h (PTHREAD_MUTEX_INITIALIZER): Define. (pthread_mutex_t): Reimplement as a struct containing a valid flag. If the flag is ever down upon entry to a mutex operation, we call pthread_mutex_create() to initialise the object. This fixes the problem of how to handle statically initialised objects that can't call InitializeCriticalSection() due to their context. (PTHREAD_ONCE_INIT): Define. * mutex.c (pthread_mutex_init): Set valid flag. (pthread_mutex_destroy): Clear valid flag. (pthread_mutex_lock): Check and handle the valid flag. (pthread_mutex_unlock): Likewise. (pthread_mutex_trylock): Likewise. * tests/mutex3.c: New file; test for the static initialisation macro. Passes. * tests/create1.c: New file; test pthread_create(). Passes. * tests/equal.c: Poor test; remove. * tests/equal1.c New file; test pthread_equal(). Passes. * tests/once1.c: New file; test for pthread_once(). Passes. * tests/self.c: Remove; rename to self1.c. * tests/self1.c: This is the old self.c. * tests/self2.c: New file. Test pthread_self() with a single thread. Passes. * tests/self3.c: New file. Test pthread_self() with a couple of threads to ensure their thread IDs differ. Passes. 1998-10-04 Ben Elliston * tests/mutex2.c: Test pthread_mutex_trylock(). Passes. * tests/mutex1.c: New basic test for mutex functions (it passes). (main): Eliminate warning. * configure.in: Test for __stdcall, not _stdcall. Typo. * configure: Regenerate. * attr.c (pthread_attr_setstackaddr): Remove FIXME comment. Win32 does know about ENOSYS after all. (pthread_attr_setstackaddr): Likewise. 1998-10-03 Ben Elliston * configure.in: Test for the `_stdcall' keyword. Define `STDCALL' to `_stdcall' if we have it, null otherwise. * configure: Regenerate. * acconfig.h (STDCALL): New define. * config.h.in: Regenerate. * create.c (ptw32_start_call): Add STDCALL prefix. * mutex.c (pthread_mutex_init): Correct function signature. * attr.c (pthread_attr_init): Only zero out the `sigmask' member if we have the sigset_t type. * pthread.h: No need to include . It doesn't even exist on Win32! Again, an artifact of cross-compilation. (pthread_sigmask): Only provide if we have the sigset_t type. * process.h: Remove. This was a stand-in before we started doing native compilation under Win32. * pthread.h (pthread_mutex_init): Make `attr' argument const. 1998-10-02 Ben Elliston * COPYING: Remove. * COPYING.LIB: Add. This library is under the LGPL. 1998-09-13 Ben Elliston * configure.in: Test for required system features. * configure: Generate. * acconfig.h: New file. * config.h.in: Generate. * Makefile.in: Renamed from Makefile. * COPYING: Import from a recent GNU package. * config.guess: Likewise. * config.sub: Likewise. * install-sh: Likewise. * config.h: Remove. * Makefile: Likewise. 1998-09-12 Ben Elliston * windows.h: No longer needed; remove. * windows.c: Likewise. Sat Sep 12 20:09:24 1998 Ross Johnson * windows.h: Remove error number definitions. These are in * tsd.c: Add comment explaining rationale for not building POSIX TSD on top of Win32 TLS. 1998-09-12 Ben Elliston * {most}.c: Include to get POSIX error values. * signal.c (pthread_sigmask): Only provide if HAVE_SIGSET_T is defined. * config.h: #undef features, don't #define them. This will be generated by autoconf very soon. 1998-08-11 Ben Elliston * Makefile (LIB): Define. (clean): Define target. (all): Build a library not just the object files. * pthread.h: Provide a definition for struct timespec if we don't already have one. * windows.c (TlsGetValue): Bug fix. Thu Aug 6 15:19:22 1998 Ross Johnson * misc.c (pthread_once): Fix arg 1 of EnterCriticalSection() and LeaveCriticalSection() calls to pass address-of lock. * fork.c (pthread_atfork): Typecast (void (*)(void *)) funcptr in each ptw32_handler_push() call. * exit.c (ptw32_exit): Fix attr arg in pthread_attr_getdetachstate() call. * private.c (ptw32_new_thread): Typecast (HANDLE) NULL. (ptw32_delete_thread): Ditto. * implement.h: (PTW32_MAX_THREADS): Add define. This keeps changing in an attempt to make thread administration data types opaque and cleanup DLL startup. * dll.c (PthreadsEntryPoint): (ptw32_virgins): Remove malloc() and free() calls. (ptw32_reuse): Ditto. (ptw32_win32handle_map): Ditto. (ptw32_threads_mutex_table): Ditto. * global.c (_POSIX_THREAD_THREADS_MAX): Initialise with PTW32_MAX_THREADS. (ptw32_virgins): Ditto. (ptw32_reuse): Ditto. (ptw32_win32handle_map): Ditto. (ptw32_threads_mutex_table): Ditto. * create.c (pthread_create): Typecast (HANDLE) NULL. Typecast (unsigned (*)(void *)) start_routine. * condvar.c (pthread_cond_init): Add address-of operator & to arg 1 of pthread_mutex_init() call. (pthread_cond_destroy): Add address-of operator & to arg 1 of pthread_mutex_destroy() call. * cleanup.c (ptw32_destructor_pop_all): Add (int) cast to pthread_getspecific() arg. (ptw32_destructor_pop): Add (void *) cast to "if" conditional. (ptw32_destructor_push): Add (void *) cast to ptw32_handler_push() "key" arg. (malloc.h): Add include. * implement.h (ptw32_destructor_pop): Add prototype. * tsd.c (implement.h): Add include. * sync.c (pthread_join): Remove target_thread_mutex and it's initialisation. Rename getdetachedstate to getdetachstate. Remove unused variable "exitcode". (pthread_detach): Remove target_thread_mutex and it's initialisation. Rename getdetachedstate to getdetachstate. Rename setdetachedstate to setdetachstate. * signal.c (pthread_sigmask): Rename SIG_SET to SIG_SETMASK. Cast "set" to (long *) in assignment to passify compiler warning. Add address-of operator & to thread->attr.sigmask in memcpy() call and assignment. (pthread_sigmask): Add address-of operator & to thread->attr.sigmask in memcpy() call and assignment. * windows.h (THREAD_PRIORITY_ERROR_RETURN): Add. (THREAD_PRIORITY_LOWEST): Add. (THREAD_PRIORITY_HIGHEST): Add. * sched.c (is_attr): Add function. (implement.h): Add include. (pthread_setschedparam): Rename all instances of "sched_policy" to "sched_priority". (pthread_getschedparam): Ditto. Tue Aug 4 16:57:58 1998 Ross Johnson * private.c (ptw32_delete_thread): Fix typo. Add missing ';'. * global.c (ptw32_virgins): Change types from pointer to array pointer. (ptw32_reuse): Ditto. (ptw32_win32handle_map): Ditto. (ptw32_threads_mutex_table): Ditto. * implement.h(ptw32_virgins): Change types from pointer to array pointer. (ptw32_reuse): Ditto. (ptw32_win32handle_map): Ditto. (ptw32_threads_mutex_table): Ditto. * private.c (ptw32_delete_thread): Fix "entry" should be "thread". * misc.c (pthread_self): Add extern for ptw32_threadID_TlsIndex. * global.c: Add comment. * misc.c (pthread_once): Fix member -> dereferences. Change ptw32_once_flag to once_control->flag in "if" test. Tue Aug 4 00:09:30 1998 Ross Johnson * implement.h(ptw32_virgins): Add extern. (ptw32_virgin_next): Ditto. (ptw32_reuse): Ditto. (ptw32_reuse_top): Ditto. (ptw32_win32handle_map): Ditto. (ptw32_threads_mutex_table): Ditto. * global.c (ptw32_virgins): Changed from array to pointer. Storage allocation for the array moved into dll.c. (ptw32_reuse): Ditto. (ptw32_win32handle_map): Ditto. (ptw32_threads_mutex_table): Ditto. * dll.c (PthreadsEntryPoint): Set up thread admin storage when DLL is loaded. * fork.c (pthread_atfork): Fix function pointer arg to all ptw32_handler_push() calls. Change "arg" arg to NULL in child push. * exit.c: Add windows.h and process.h includes. (ptw32_exit): Add local detachstate declaration. (ptw32_exit): Fix incorrect name for pthread_attr_getdetachstate(). * pthread.h (_POSIX_THREAD_ATTR_STACKSIZE): Move from global.c (_POSIX_THREAD_ATTR_STACKADDR): Ditto. * create.c (pthread_create): Fix #if should be #ifdef. (ptw32_start_call): Remove usused variables. * process.h: Create. * windows.h: Move _beginthreadex and _endthreadex into process.h Mon Aug 3 21:19:57 1998 Ross Johnson * condvar.c (pthread_cond_init): Add NULL attr to pthread_mutex_init() call - default attributes will be used. (cond_wait): Fix typo. (cond_wait): Fix typo - cv was ev. (pthread_cond_broadcast): Fix two identical typos. * cleanup.c (ptw32_destructor_pop_all): Remove _ prefix from PTHREAD_DESTRUCTOR_ITERATIONS. * pthread.h: Move _POSIX_* values into posix.h * pthread.h: Fix typo in pthread_mutex_init() prototype. * attr.c (pthread_attr_init): Fix error in priority member init. * windows.h (THREAD_PRIORITY_NORMAL): Add. * pthread.h (sched_param): Add missing ';' to struct definition. * attr.c (pthread_attr_init): Remove obsolete pthread_attr_t member initialisation - cancelstate, canceltype, cancel_pending. (is_attr): Make arg "attr" a const. * implement.h (PTW32_HANDLER_POP_LIFO): Remove definition. (PTW32_HANDLER_POP_FIFO): Ditto. (PTW32_VALID): Add missing newline escape (\). (ptw32_handler_node): Make element "next" a pointer. 1998-08-02 Ben Elliston * windows.h: Remove duplicate TlsSetValue() prototype. Add TlsGetValue() prototype. (FALSE): Define. (TRUE): Likewise. Add forgotten errno values. Guard against multiple #includes. * windows.c: New file. Implement stubs for Win32 functions. * Makefile (SRCS): Remove. Not explicitly needed. (CFLAGS): Add -Wall for all warnings with GCC. Sun Aug 2 19:03:42 1998 Ross Johnson * config.h: Create. This is a temporary stand-in for autoconf yet to be done. (HAVE_SIGNAL_H): Add. * pthread.h: Minor rearrangement for temporary config.h. Fri Jul 31 14:00:29 1998 Ross Johnson * cleanup.c (ptw32_destructor_pop): Implement. Removes destructors associated with a key without executing them. (ptw32_destructor_pop_all): Add FIXME comment. * tsd.c (pthread_key_delete): Add call to ptw32_destructor_pop(). Fri Jul 31 00:05:45 1998 Ross Johnson * tsd.c (pthread_key_create): Update to properly associate the destructor routine with the key. (pthread_key_delete): Add FIXME comment. * exit.c (ptw32_vacuum): Add call to ptw32_destructor_pop_all(). * implement.h (ptw32_handler_pop_all): Add prototype. (ptw32_destructor_pop_all): Ditto. * cleanup.c (ptw32_destructor_push): Implement. This is just a call to ptw32_handler_push(). (ptw32_destructor_pop_all): Implement. This is significantly different to ptw32_handler_pop_all(). * Makefile (SRCS): Create. Preliminary. * windows.h: Create. Contains Win32 definitions for compile testing. This is just a standin for the real one. * pthread.h (SIG_UNBLOCK): Fix typo. Was SIG_BLOCK. (windows.h): Add include. Required for CRITICAL_SECTION. (pthread_cond_t): Move enum declaration outside of struct definition. (unistd.h): Add include - may be temporary. * condvar.c (windows.h): Add include. * implement.h (PTW32_THIS): Remove - no longer required. (PTW32_STACK): Use pthread_self() instead of PTW32_THIS. Thu Jul 30 23:12:45 1998 Ross Johnson * implement.h: Remove ptw32_find_entry() prototype. * private.c: Extend comments. Remove ptw32_find_entry() - no longer needed. * create.c (ptw32_start_call): Add call to TlsSetValue() to store the thread ID. * dll.c (PthreadsEntryPoint): Implement. This is called whenever a process loads the DLL. Used to initialise thread local storage. * implement.h: Add ptw32_threadID_TlsIndex. Add ()s around PTW32_VALID expression. * misc.c (pthread_self): Re-implement using Win32 TLS to store the threads own ID. Wed Jul 29 11:39:03 1998 Ross Johnson * private.c: Corrections in comments. (ptw32_new_thread): Alter "if" flow to be more natural. * cleanup.c (ptw32_handler_push): Same as below. * create.c (pthread_create): Same as below. * private.c (ptw32_new_thread): Rename "new" to "new_thread". Since when has a C programmer been required to know C++? Tue Jul 28 14:04:29 1998 Ross Johnson * implement.h: Add PTW32_VALID macro. * sync.c (pthread_join): Modify to use the new thread type and ptw32_delete_thread(). Rename "target" to "thread". Remove extra local variable "target". (pthread_detach): Ditto. * signal.c (pthread_sigmask): Move init of "us" out of inner block. Fix instance of "this" should have been "us". Rename "us" to "thread". * sched.c (pthread_setschedparam): Modify to use the new thread type. (pthread_getschedparam): Ditto. * private.c (ptw32_find_thread): Fix return type and arg. * implement.h: Remove PTW32_YES and PTW32_NO. (ptw32_new_thread): Add prototype. (ptw32_find_thread): Ditto. (ptw32_delete_thread): Ditto. (ptw32_new_thread_entry): Remove prototype. (ptw32_find_thread_entry): Ditto. (ptw32_delete_thread_entry): Ditto. ( PTW32_NEW, PTW32_INUSE, PTW32_EXITED, PTW32_REUSE): Add. * create.c (pthread_create): Minor rename "us" to "new" (I need these cues but it doesn't stop me coming out with some major bugs at times). Load start_routine and arg into the thread so the wrapper can call it. * exit.c (pthread_exit): Fix pthread_this should be pthread_self. * cancel.c (pthread_setcancelstate): Change ptw32_threads_thread_t * to pthread_t and init with pthread_this(). (pthread_setcanceltype): Ditto. * exit.c (ptw32_exit): Add new pthread_t arg. Rename ptw32_delete_thread_entry to ptw32_delete_thread. Rename "us" to "thread". (pthread_exit): Call ptw32_exit with added thread arg. * create.c (ptw32_start_call): Insert missing ")". Add "us" arg to ptw32_exit() call. (pthread_create): Modify to use new thread allocation scheme. * private.c: Added detailed explanation of the new thread allocation scheme. (ptw32_new_thread): Totally rewritten to use new thread allocation scheme. (ptw32_delete_thread): Ditto. (ptw32_find_thread): Obsolete. Mon Jul 27 17:46:37 1998 Ross Johnson * create.c (pthread_create): Start of rewrite. Not completed yet. * private.c (ptw32_new_thread_entry): Start of rewrite. Not complete. * implement.h (ptw32_threads_thread): Rename, remove thread member, add win32handle and ptstatus members. (ptw32_t): Add. * pthread.h: pthread_t is no longer mapped directly to a Win32 HANDLE type. This is so we can let the Win32 thread terminate and reuse the HANDLE while pthreads holds it's own thread ID until the last waiting join exits. Mon Jul 27 00:20:37 1998 Ross Johnson * private.c (ptw32_delete_thread_entry): Destroy the thread entry attribute object before deleting the thread entry itself. * attr.c (pthread_attr_init): Initialise cancel_pending = FALSE. (pthread_attr_setdetachstate): Rename "detached" to "detachedstate". (pthread_attr_getdetachstate): Ditto. * exit.c (ptw32_exit): Fix incorrect check for detachedstate. * implement.h (ptw32_call_t): Remove env member. Sun Jul 26 13:06:12 1998 Ross Johnson * implement.h (ptw32_new_thread_entry): Fix prototype. (ptw32_find_thread_entry): Ditto. (ptw32_delete_thread_entry): Ditto. (ptw32_exit): Add prototype. * exit.c (ptw32_exit): New function. Called from pthread_exit() and ptw32_start_call() to exit the thread. It allows an extra argument which is the return code passed to _endthreadex(). (ptw32_exit): Move thread entry delete call from ptw32_vacuum() into here. Add more explanation of thread entry deletion. (ptw32_exit): Clarify comment. * create.c (ptw32_start_call): Change pthread_exit() call to ptw32_exit() call. * exit.c (ptw32_vacuum): Add thread entry deletion code moved from ptw32_start_call(). See next item. (pthread_exit): Remove longjmp(). Add mutex lock around thread table manipulation code. This routine now calls _enthreadex(). * create.c (ptw32_start_call): Remove setjmp() call and move cleanup code out. Call pthread_exit(NULL) to terminate the thread. 1998-07-26 Ben Elliston * tsd.c (pthread_getspecific): Update comments. * mutex.c (pthread_mutexattr_setpshared): Not supported; remove. (pthread_mutexattr_getpshared): Likewise. * pthread.h (pthread_mutexattr_setpshared): Remove prototype. (pthread_mutexattr_getpshared): Likewise. Sun Jul 26 00:09:59 1998 Ross Johnson * sync.c: Rename all instances of ptw32_count_mutex to ptw32_table_mutex. * implement.h: Rename ptw32_count_mutex to ptw32_table_mutex. * global.c: Rename ptw32_count_mutex to ptw32_table_mutex. * create.c (pthread_create): Add critical sections. (ptw32_start_call): Rename ptw32_count_mutex to ptw32_table_mutex. * cancel.c (pthread_setcancelstate): Fix indirection bug and rename "this" to "us". * signal.c (pthread_sigmask): Rename "this" to "us" and fix some minor syntax errors. Declare "us" and initialise it. * sync.c (pthread_detach): Rename "this" to "target". * pthread.h: Converting PTHREAD_* defines to alias the (const int) values in global.c. * global.c: Started converting PTHREAD_* defines to (const int) as a part of making the eventual pthreads DLL binary compatible through version changes. * condvar.c (cond_wait): Add cancelation point. This applies the point to both pthread_cond_wait() and pthread_cond_timedwait(). * exit.c (pthread_exit): Rename "this" to "us". * implement.h: Add comment. * sync.c (pthread_join): I've satisfied myself that pthread_detach() does set the detached attribute in the thread entry attributes to PTHREAD_CREATE_DETACHED. "if" conditions were changed to test that attribute instead of a separate flag. * create.c (pthread_create): Rename "this" to "us". (pthread_create): cancelstate and canceltype are not attributes so the copy to thread entry attribute storage was removed. Only the thread itself can change it's cancelstate or canceltype, ie. the thread must exist already. * private.c (ptw32_delete_thread_entry): Mutex locks removed. Mutexes must be applied at the caller level. (ptw32_new_thread_entry): Ditto. (ptw32_new_thread_entry): Init cancelstate, canceltype, and cancel_pending to default values. (ptw32_new_thread_entry): Rename "this" to "new". (ptw32_find_thread_entry): Rename "this" to "entry". (ptw32_delete_thread_entry): Rename "thread_entry" to "entry". * create.c (ptw32_start_call): Mutexes changed to ptw32_count_mutex. All access to the threads table entries is under the one mutex. Otherwise chaos reigns. Sat Jul 25 23:16:51 1998 Ross Johnson * implement.h (ptw32_threads_thread): Move cancelstate and canceltype members out of pthread_attr_t into here. * fork.c (fork): Add comment. 1998-07-25 Ben Elliston * fork.c (fork): Autoconfiscate. Sat Jul 25 00:00:13 1998 Ross Johnson * create.c (ptw32_start_call): Set thread priority. Ensure our thread entry is removed from the thread table but only if pthread_detach() was called and there are no waiting joins. (pthread_create): Set detach flag in thread entry if the thread is created PTHREAD_CREATE_DETACHED. * pthread.h (pthread_attr_t): Rename member "detachedstate". * attr.c (pthread_attr_init): Rename attr members. * exit.c (pthread_exit): Fix indirection mistake. * implement.h (PTW32_THREADS_TABLE_INDEX): Add. * exit.c (ptw32_vacuum): Fix incorrect args to ptw32_handler_pop_all() calls. Make thread entry removal conditional. * sync.c (pthread_join): Add multiple join and async detach handling. * implement.h (PTW32_THREADS_TABLE_INDEX): Add. * global.c (ptw32_threads_mutex_table): Add. * implement.h (ptw32_once_flag): Remove. (ptw32_once_lock): Ditto. (ptw32_threads_mutex_table): Add. * global.c (ptw32_once_flag): Remove. (ptw32_once_lock): Ditto. * sync.c (pthread_join): Fix tests involving new return value from ptw32_find_thread_entry(). (pthread_detach): Ditto. * private.c (ptw32_find_thread_entry): Failure return code changed from -1 to NULL. Fri Jul 24 23:09:33 1998 Ross Johnson * create.c (pthread_create): Change . to -> in sigmask memcpy() args. * pthread.h: (pthread_cancel): Add function prototype. (pthread_testcancel): Ditto. 1998-07-24 Ben Elliston * pthread.h (pthread_condattr_t): Rename dummy structure member. (pthread_mutexattr_t): Likewise. Fri Jul 24 21:13:55 1998 Ross Johnson * cancel.c (pthread_cancel): Implement. (pthread_testcancel): Implement. * exit.c (pthread_exit): Add comment explaining the longjmp(). * implement.h (ptw32_threads_thread_t): New member cancelthread. (PTW32_YES): Define. (PTW32_NO): Define. (RND_SIZEOF): Remove. * create.c (pthread_create): Rename cancelability to cancelstate. * pthread.h (pthread_attr_t): Rename cancelability to cancelstate. (PTHREAD_CANCELED): Define. 1998-07-24 Ben Elliston * pthread.h (SIG_BLOCK): Define if not already defined. (SIG_UNBLOCK): Likewise. (SIG_SETMASK): Likewise. (pthread_attr_t): Add signal mask member. (pthread_sigmask): Add function prototype. * signal.c (pthread_sigmask): Implement. * create.c: #include to get a prototype for memcpy(). (pthread_create): New threads inherit their creator's signal mask. Copy the signal mask to the new thread structure if we know about signals. Fri Jul 24 16:33:17 1998 Ross Johnson * fork.c (pthread_atfork): Add all the necessary push calls. Local implementation semantics: If we get an ENOMEM at any time then ALL handlers (including those from previous pthread_atfork() calls) will be popped off each of the three atfork stacks before we return. (fork): Add all the necessary pop calls. Add the thread cancellation and join calls to the child fork. Add #includes. * implement.h: (ptw32_handler_push): Fix return type and stack arg type in prototype. (ptw32_handler_pop): Fix stack arg type in prototype. (ptw32_handler_pop_all): Fix stack arg type in prototype. * cleanup.c (ptw32_handler_push): Change return type to int and return ENOMEM if malloc() fails. * sync.c (pthread_detach): Use equality test, not assignment. * create.c (ptw32_start_call): Add call to Win32 CloseHandle() if thread is detached. 1998-07-24 Ben Elliston * sync.c (pthread_detach): Close the Win32 thread handle to emulate detached (or daemon) threads. Fri Jul 24 03:00:25 1998 Ross Johnson * sync.c (pthread_join): Save valueptr arg in joinvalueptr for pthread_exit() to use. * private.c (ptw32_new_thread_entry): Initialise joinvalueptr to NULL. * create.c (ptw32_start_call): Rewrite to facilitate joins. pthread_exit() will do a longjmp() back to here. Does appropriate cleanup and exit/return from the thread. (pthread_create): _beginthreadex() now passes a pointer to our thread table entry instead of just the call member of that entry. * implement.h (ptw32_threads_thread): New member void ** joinvalueptr. (ptw32_call_t): New member jmpbuf env. * exit.c (pthread_exit): Major rewrite to handle joins and handing value pointer to joining thread. Uses longjmp() back to ptw32_start_call(). * create.c (pthread_create): Ensure values of new attribute members are copied to the thread attribute object. * attr.c (pthread_attr_destroy): Fix merge conflicts. (pthread_attr_getdetachstate): Fix merge conflicts. (pthread_attr_setdetachstate): Fix merge conflicts. * pthread.h: Fix merge conflicts. * sync.c (pthread_join): Fix merge conflicts. Fri Jul 24 00:21:21 1998 Ross Johnson * sync.c (pthread_join): Add check for valid and joinable thread. (pthread_detach): Implement. After checking for a valid and joinable thread, it's still a no-op. * private.c (ptw32_find_thread_entry): Bug prevented returning an error value in some cases. * attr.c (pthread_attr_setdetachedstate): Implement. (pthread_attr_getdetachedstate): Implement. * implement.h: Move more hidden definitions into here from pthread.h. 1998-07-24 Ben Elliston * pthread.h (PTHREAD_CREATE_JOINABLE): Define. (PTHREAD_CREATE_DETACHED): Likewise. (pthread_attr_t): Add new structure member `detached'. (pthread_attr_getdetachstate): Add function prototype. (pthread_attr_setdetachstate): Likewise. * sync.c (pthread_join): Return if the target thread is detached. * attr.c (pthread_attr_init): Initialise cancelability and canceltype structure members. (pthread_attr_getdetachstate): Implement. (pthread_attr_setdetachstate): Likewise. * implement.h (PTW32_CANCEL_DEFAULTS): Remove. Bit fields proved to be too cumbersome. Set the defaults in attr.c using the public PTHREAD_CANCEL_* constants. * cancel.c: New file. * pthread.h (sched_param): Define this type. (pthread_attr_getschedparam): Add function prototype. (pthread_attr_setschedparam): Likewise. (pthread_setcancelstate): Likewise. (pthread_setcanceltype): Likewise. (sched_get_priority_min): Likewise. (sched_get_priority_max): Likewise. (pthread_mutexattr_setprotocol): Remove; not supported. (pthread_mutexattr_getprotocol): Likewise. (pthread_mutexattr_setprioceiling): Likewise. (pthread_mutexattr_getprioceiling): Likewise. (pthread_attr_t): Add canceltype member. Update comments. (SCHED_OTHER): Define this scheduling policy constant. (SCHED_FIFO): Likewise. (SCHED_RR): Likewise. (SCHED_MIN): Define the lowest possible value for this constant. (SCHED_MAX): Likewise, the maximum possible value. (PTHREAD_CANCEL_ASYNCHRONOUS): Redefine. (PTHREAD_CANCEL_DEFERRED): Likewise. * sched.c: New file. (pthread_setschedparam): Implement. (pthread_getschedparam): Implement. (sched_get_priority_max): Validate policy argument. (sched_get_priority_min): Likewise. * mutex.c (pthread_mutexattr_setprotocol): Remove; not supported. (pthread_mutexattr_getprotocol): Likewise. (pthread_mutexattr_setprioceiling): Likewise. (pthread_mutexattr_getprioceiling): Likewise. Fri Jul 24 00:21:21 1998 Ross Johnson * create.c (pthread_create): Arg to ptw32_new_thread_entry() changed. See next entry. Move mutex locks out. Changes made yesterday and today allow us to start the new thread running rather than temporarily suspended. * private.c (ptw32_new_thread_entry): ptw32_thread_table was changed back to a table of thread structures rather than pointers. As such we're trading storage for increaded speed. This routine was modified to work with the new table. Mutex lock put in around global data accesses. (ptw32_find_thread_entry): Ditto (ptw32_delete_thread_entry): Ditto Thu Jul 23 23:25:30 1998 Ross Johnson * global.c: New. Global data objects declared here. These moved from pthread.h. * pthread.h: Move implementation hidden definitions into implement.h. * implement.h: Move implementation hidden definitions from pthread.h. Add constants to index into the different handler stacks. * cleanup.c (ptw32_handler_push): Simplify args. Restructure. (ptw32_handler_pop): Simplify args. Restructure. (ptw32_handler_pop_all): Simplify args. Restructure. Wed Jul 22 00:16:22 1998 Ross Johnson * attr.c, implement.h, pthread.h, ChangeLog: Resolve CVS merge conflicts. * private.c (ptw32_find_thread_entry): Changes to return type to support leaner ptw32_threads_table[] which now only stores ptw32_thread_thread_t *. (ptw32_new_thread_entry): Internal changes. (ptw32_delete_thread_entry): Internal changes to avoid contention. Calling routines changed accordingly. * pthread.h: Modified cleanup macros to use new generic push and pop. Added destructor and atfork stacks to ptw32_threads_thread_t. * cleanup.c (ptw32_handler_push, ptw32_handler_pop, ptw32_handler_pop_all): Renamed cleanup push and pop routines and made generic to handle destructors and atfork handlers as well. * create.c (ptw32_start_call): New function is a wrapper for all new threads. It allows us to do some cleanup when the thread returns, ie. that is otherwise only done if the thread is cancelled. * exit.c (ptw32_vacuum): New function contains code from pthread_exit() that we need in the new ptw32_start_call() as well. * implement.h: Various additions and minor changes. * pthread.h: Various additions and minor changes. Change cleanup handler macros to use generic handler push and pop functions. * attr.c: Minor mods to all functions. (is_attr): Implemented missing function. * create.c (pthread_create): More clean up. * private.c (ptw32_find_thread_entry): Implement. (ptw32_delete_thread_entry): Implement. (ptw32_new_thread_entry): Implement. These functions manipulate the implementations internal thread table and are part of general code cleanup and modularisation. They replace ptw32_getthreadindex() which was removed. * exit.c (pthread_exit): Changed to use the new code above. * pthread.h: Add cancelability constants. Update comments. 1998-07-22 Ben Elliston * attr.c (pthread_setstacksize): Update test of attr argument. (pthread_getstacksize): Likewise. (pthread_setstackaddr): Likewise. (pthread_getstackaddr): Likewise. (pthread_attr_init): No need to allocate any storage. (pthread_attr_destroy): No need to free any storage. * mutex.c (is_attr): Not likely to be needed; remove. (remove_attr): Likewise. (insert_attr): Likewise. * implement.h (ptw32_mutexattr_t): Moved to a public definition in pthread.h. There was little gain in hiding these details. (ptw32_condattr_t): Likewise. (ptw32_attr_t): Likewise. * pthread.h (pthread_atfork): Add function prototype. (pthread_attr_t): Moved here from implement.h. * fork.c (pthread_atfork): Preliminary implementation. (ptw32_fork): Likewise. Wed Jul 22 00:16:22 1998 Ross Johnson * cleanup.c (ptw32_cleanup_push): Implement. (ptw32_cleanup_pop): Implement. (ptw32_do_cancellation): Implement. These are private to the implementation. The real cleanup functions are macros. See below. * pthread.h (pthread_cleanup_push): Implement as a macro. (pthread_cleanup_pop): Implement as a macro. Because these are macros which start and end a block, the POSIX scoping requirement is observed. See the comment in the file. * exit.c (pthread_exit): Refine the code. * create.c (pthread_create): Code cleanup. * implement.h (RND_SIZEOF): Add RND_SIZEOF(T) to round sizeof(T) up to multiple of DWORD. Add function prototypes. * private.c (ptw32_getthreadindex): "*thread" should have been "thread". Detect empty slot fail condition. 1998-07-20 Ben Elliston * misc.c (pthread_once): Implement. Don't use a per-application flag and mutex--make `pthread_once_t' contain these elements in their structure. The earlier version had incorrect semantics. * pthread.h (ptw32_once_flag): Add new variable. Remove. (ptw32_once_lock): Add new mutex lock to ensure integrity of access to ptw32_once_flag. Remove. (pthread_once): Add function prototype. (pthread_once_t): Define this type. Mon Jul 20 02:31:05 1998 Ross Johnson * private.c (ptw32_getthreadindex): Implement. * pthread.h: Add application static data dependent on _PTHREADS_BUILD_DLL define. This is needed to avoid allocating non-sharable static data within the pthread DLL. * implement.h: Add ptw32_cleanup_stack_t, ptw32_cleanup_node_t and PTW32_HASH_INDEX. * exit.c (pthread_exit): Begin work on cleanup and de-allocate thread-private storage. * create.c (pthread_create): Add thread to thread table. Keep a thread-private copy of the attributes with default values filled in when necessary. Same for the cleanup stack. Make pthread_create C run-time library friendly by using _beginthreadex() instead of CreateThread(). Fix error returns. Sun Jul 19 16:26:23 1998 Ross Johnson * implement.h: Rename pthreads_thread_count to ptw32_threads_count. Create ptw32_threads_thread_t struct to keep thread specific data. * create.c: Rename pthreads_thread_count to ptw32_threads_count. (pthread_create): Handle errors from CreateThread(). 1998-07-19 Ben Elliston * condvar.c (pthread_cond_wait): Generalise. Moved from here .. (cond_wait): To here. (pthread_cond_timedwait): Implement; use generalised cond_wait(). * pthread.h (pthread_key_t): Define this type. (pthread_key_create): Add function prototype. (pthread_setspecific): Likewise. (pthread_getspecific): Likwise. (pthread_key_delete): Likewise. * tsd.c (pthread_key_create): Implement. (pthread_setspecific): Likewise. (pthread_getspecific): Likewise. (pthread_key_delete): Likewise. * mutex.c (pthread_mutex_trylock): Return ENOSYS if this function is called on a Win32 platform which is not Windows NT. 1998-07-18 Ben Elliston * condvar.c (pthread_condattr_init): Do not attempt to malloc any storage; none is needed now that condattr_t is an empty struct. (pthread_condattr_destory): Likewise; do not free storage. (pthread_condattr_setpshared): No longer supported; return ENOSYS. (pthread_condattr_getpshared): Likewise. (pthread_cond_init): Implement with help from Douglas Schmidt. Remember to initialise the cv's internal mutex. (pthread_cond_wait): Likewise. (pthread_cond_signal): Likewise. (pthread_cond_broadcast): Likewise. (pthread_cond_timedwait): Preliminary implementation, but I need to see some API documentation for `WaitForMultipleObject'. (pthread_destory): Implement. * pthread.h (pthread_cond_init): Add function protoype. (pthread_cond_broadcast): Likewise. (pthread_cond_signal): Likewise. (pthread_cond_timedwait): Likewise. (pthread_cond_wait): Likewise. (pthread_cond_destroy): Likewise. (pthread_cond_t): Define this type. Fix for u_int. Do not assume that the mutex contained withing the pthread_cond_t structure will be a critical section. Use our new POSIX type! * implement.h (ptw32_condattr_t): Remove shared attribute. 1998-07-17 Ben Elliston * pthread.h (PTHREADS_PROCESS_PRIVATE): Remove. (PTHREAD_PROCESS_SHARED): Likewise. No support for mutexes shared across processes for now. (pthread_mutex_t): Use a Win32 CRITICAL_SECTION type for better performance. * implement.h (ptw32_mutexattr_t): Remove shared attribute. * mutex.c (pthread_mutexattr_setpshared): This optional function is no longer supported, since we want to implement POSIX mutex variables using the much more efficient Win32 critical section primitives. Critical section objects in Win32 cannot be shared between processes. (pthread_mutexattr_getpshared): Likewise. (pthread_mutexattr_init): No need to malloc any storage; the attributes structure is now empty. (pthread_mutexattr_destroy): This is now a nop. (pthread_mutex_init): Use InitializeCriticalSection(). (pthread_mutex_destroy): Use DeleteCriticalSection(). (pthread_mutex_lock): Use EnterCriticalSection(). (pthread_mutex_trylock): Use TryEnterCriticalSection(). This is not supported by Windows 9x, but trylock is a hack anyway, IMHO. (pthread_mutex_unlock): Use LeaveCriticalSection(). 1998-07-14 Ben Elliston * attr.c (pthread_attr_setstacksize): Implement. (pthread_attr_getstacksize): Likewise. (pthread_attr_setstackaddr): Likewise. (pthread_attr_getstackaddr): Likewise. (pthread_attr_init): Likewise. (pthread_attr_destroy): Likewise. * condvar.c (pthread_condattr_init): Add `_cond' to function name. * mutex.c (pthread_mutex_lock): Add `_mutex' to function name. (pthread_mutex_trylock): Likewise. (pthread_mutex_unlock): Likewise. * pthread.h (pthread_condattr_setpshared): Fix typo. (pthread_attr_init): Add function prototype. (pthread_attr_destroy): Likewise. (pthread_attr_setstacksize): Likewise. (pthread_attr_getstacksize): Likewise. (pthread_attr_setstackaddr): Likewise. (pthread_attr_getstackaddr): Likewise. Mon Jul 13 01:09:55 1998 Ross Johnson * implement.h: Wrap in #ifndef _IMPLEMENT_H * create.c (pthread_create): Map stacksize attr to Win32. * mutex.c: Include implement.h 1998-07-13 Ben Elliston * condvar.c (pthread_condattr_init): Implement. (pthread_condattr_destroy): Likewise. (pthread_condattr_setpshared): Likewise. (pthread_condattr_getpshared): Likewise. * implement.h (PTHREAD_THREADS_MAX): Remove trailing semicolon. (PTHREAD_STACK_MIN): Specify; needs confirming. (ptw32_attr_t): Define this type. (ptw32_condattr_t): Likewise. * pthread.h (pthread_mutex_t): Define this type. (pthread_condattr_t): Likewise. (pthread_mutex_destroy): Add function prototype. (pthread_lock): Likewise. (pthread_trylock): Likewise. (pthread_unlock): Likewise. (pthread_condattr_init): Likewise. (pthread_condattr_destroy): Likewise. (pthread_condattr_setpshared): Likewise. (pthread_condattr_getpshared): Likewise. * mutex.c (pthread_mutex_init): Implement. (pthread_mutex_destroy): Likewise. (pthread_lock): Likewise. (pthread_trylock): Likewise. (pthread_unlock): Likewise. 1998-07-12 Ben Elliston * implement.h (ptw32_mutexattr_t): Define this implementation internal type. Application programmers only see a mutex attribute object as a void pointer. * pthread.h (pthread_mutexattr_t): Define this type. (pthread_mutexattr_init): Add function prototype. (pthread_mutexattr_destroy): Likewise. (pthread_mutexattr_setpshared): Likewise. (pthread_mutexattr_getpshared): Likewise. (pthread_mutexattr_setprotocol): Likewise. (pthread_mutexattr_getprotocol): Likewise. (pthread_mutexattr_setprioceiling): Likewise. (pthread_mutexattr_getprioceiling): Likewise. (PTHREAD_PROCESS_PRIVATE): Define. (PTHREAD_PROCESS_SHARED): Define. * mutex.c (pthread_mutexattr_init): Implement. (pthread_mutexattr_destroy): Implement. (pthread_mutexattr_setprotocol): Implement. (pthread_mutexattr_getprotocol): Likewise. (pthread_mutexattr_setprioceiling): Likewise. (pthread_mutexattr_getprioceiling): Likewise. (pthread_mutexattr_setpshared): Likewise. (pthread_mutexattr_getpshared): Likewise. (insert_attr): New function; very preliminary implementation! (is_attr): Likewise. (remove_attr): Likewise. Sat Jul 11 14:48:54 1998 Ross Johnson * implement.h: Preliminary implementation specific defines. * create.c (pthread_create): Preliminary implementation. 1998-07-11 Ben Elliston * sync.c (pthread_join): Implement. * misc.c (pthread_equal): Likewise. * pthread.h (pthread_join): Add function prototype. (pthread_equal): Likewise. 1998-07-10 Ben Elliston * misc.c (pthread_self): Implement. * exit.c (pthread_exit): Implement. * pthread.h (pthread_exit): Add function prototype. (pthread_self): Likewise. (pthread_t): Define this type. 1998-07-09 Ben Elliston * create.c (pthread_create): A dummy stub right now. * pthread.h (pthread_create): Add function prototype.