changelog

pthread source code,you can compile directly

	* pthread.c: Agregation of agregate modules for super-inlineability.

2002-02-02  Ross Johnson  <rpj at setup1.ise.canberra.edu.au>

	* 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  <rpj at setup1.ise.canberra.edu.au>

	* 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  <rpj at special.ise.canberra.edu.au>

	* 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  <rpj at special.ise.canberra.edu.au>

	* 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  <rpj at special.ise.canberra.edu.au>

	* 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  <rpj at special.ise.canberra.edu.au>

	* attr.c (pthread_attr_setscope): Fix struct pointer
	indirection error introduced 2002-01-04.
	(pthread_attr_getscope): Likewise.

2002-01-12  Ross Johnson  <rpj at special.ise.canberra.edu.au>

	* pthread.dsp (SOURCE): Add missing source files.

2002-01-08  Ross Johnson  <rpj at setup1.ise.canberra.edu.au>

	* 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 <tpfaff at gmx.net>, Alexander Terekhov <TEREKHOV at de.ibm.com>

	* 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  <rpj at setup1.ise.canberra.edu.au>

	* 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 <TEREKHOV at de.ibm.com>

	* mutex.c (pthread_mutex_lock): Decrementing lock_idx was
	not thread-safe.
	(pthread_mutex_trylock): Likewise.

2001-10-26  [e-mail]

	* 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  <rpj at setup1.ise.canberra.edu.au>

	* 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  <rpj at setup1.ise.canberra.edu.au>

	* 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  <rpj at setup1.ise.canberra.edu.au>

	* 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  <rpj at setup1.ise.canberra.edu.au>

	* 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  <rpj at setup1.ise.canberra.edu.au>

	* spin.c (pthread_spin_unlock): Was not returning
	EPERM if the spinlock was not locked, for multi CPU
	machines.

2001-10-08  Ross Johnson  <rpj at setup1.ise.canberra.edu.au>

	* spin.c (pthread_spin_trylock): Was not returning
	EBUSY for multi CPU machines.

2001-08-24  Ross Johnson  <rpj at setup1.ise.canberra.edu.au>

	* condvar.c (pthread_cond_destroy): Remove cv element
	that is no longer used.
	* implement.h: Likewise.

2001-08-23  Alexander Terekhov <TEREKHOV at de.ibm.com>

	* 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. <phil at hawksoft.com>

	* tsd.c (pthread_getspecific): Preserve the last
	winsock error [from WSAGetLastError()].

2001-07-18  Scott McCaskill <scott at magruder.org>

	* 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  <rpj at setup1.ise.canberra.edu.au>

	* 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  <rpj at setup1.ise.canberra.edu.au>

	* 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  <rpj at setup1.ise.canberra.edu.au>

	* 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  <rpj at setup1.ise.canberra.edu.au>

	* 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  <rpj at setup1.ise.canberra.edu.au>

	* 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  <rpj at setup1.ise.canberra.edu.au>

	* 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