changelog

附件是linux下面非常经典的线程库

	is consuming a CV signal that it shouldn't and this is
	breaking the avoidance logic.

2002-07-30  Ross Johnson  <rpj at ise.canberra.edu.au>

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

	* 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  <rfanner at stonethree.com>

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

	* 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  <rfanner at stonethree.com>

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

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

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

	* pthread_cond_destroy.c (pthread_cond_destroy):
	Enter the time change critical section earlier.

2002-02-17  Ross Johnson  <rpj at setup1.ise.canberra.edu.au

	* Testsuite passed.

	* pthread_timechange_handler_np.c: New; following
	a suggestion from Alexander Terekhov that CVs should
	be broadcast so that they all re-evaluate their
	condition variables and reset a new timeout if
	required, whenever an application receives a
	WM_TIMECHANGE message. This message indicates that
	the system time has been changed. Therefore, CVs
	waiting for a timeout set as an abs_time will possibly
	not wake up at the expected time. Some applications
	may not be tolerant of this.
	* pthread_cond_init.c: Add CV to linked list.
	* pthread_cond_destroy.c: Remove CV from linked list.
	* global.c (ptw32_cond_list_head): New variable.
	(ptw32_cond_list_tail): New variable.
	(ptw32_cond_list_cs): New critical section.
	* ptw32_processInitialize (ptw32_cond_list_cs): Initialize.
	* ptw32_processTerminate (ptw32_cond_list_cs): Delete.


	* 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]

	* spin.c: Split file into function segments.
	* ptw32_spinlock_check_need_init.c: Separated routine from spin.c.
	* pthread_spin_init.c: Likewise.
	* pthread_spin_destroy.c: Likewise.
	* pthread_spin_lock.c: Likewise.
	* pthread_spin_unlock.c: Likewise.
	* pthread_spin_trylock.c: Likewise.

	* sync.c: Split file into function segments.
	* pthread_detach.c: Separated routine from sync.c.
	* pthread_join.c: Likewise.

	* tsd.c: Split file into function segments.
	* pthread_key_create.c: Separated routine from tsd.c.
	* pthread_key_delete.c: Likewise.
	* pthread_setspecific.c: Likewise.
	* pthread_getspecific.c: Likewise.

	* sched.c: Split file into function segments.
	* pthread_attr_setschedpolicy.c: Separated routine from sched.c.
	* pthread_attr_getschedpolicy.c: Likewise.
	* pthread_attr_setschedparam.c: Likewise.
	* pthread_attr_getschedparam.c: Likewise.
	* pthread_attr_setinheritsched.c: Likewise.
	* pthread_attr_getinheritsched.c: Likewise.
	* pthread_setschedparam.c: Likewise.
	* pthread_getschedparam.c: Likewise.
	* sched_get_priority_max.c: Likewise.
	* sched_get_priority_min.c: Likewise.
	* sched_setscheduler.c: Likewise.
	* sched_getscheduler.c: Likewise.
	* sched_yield.c: Likewise.


2002-02-16  Ross Johnson  <rpj at setup1.ise.canberra.edu.au

	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]

	* mutex.c: Split file into function segments.
	* pthread_mutexattr_destroy.c: Separated routine from mutex.c
	* pthread_mutexattr_getpshared.c: Likewise.
	* pthread_mutexattr_gettype.c: Likewise.
	* pthread_mutexattr_init.c: Likewise.
	* pthread_mutexattr_setpshared.c: Likewise.
	* pthread_mutexattr_settype.c: Likewise.
	* ptw32_mutex_check_need_init.c: Likewise.
	* pthread_mutex_destroy.c: Likewise.
	* pthread_mutex_init.c: Likewise.
	* pthread_mutex_lock.c: Likewise.
	* pthread_mutex_timedlock.c: Likewise.
	* pthread_mutex_trylock.c: Likewise.
	* pthread_mutex_unlock.c: Likewise.
	
	* private.c: Split file into function segments.
	* ptw32_InterlockedCompareExchange.c: Separated routine from private.c
	* ptw32_callUserDestroyRoutines.c: Likewise.
	* ptw32_getprocessors.c: Likewise.
	* ptw32_processInitialize.c: Likewise.
	* ptw32_processTerminate.c: Likewise.
	* ptw32_threadDestroy.c: Likewise.
	* ptw32_threadStart.c: Likewise.
	* ptw32_throw.c: Likewise.
	* ptw32_timespec.c: Likewise.
	* ptw32_tkAssocCreate.c: Likewise.
	* ptw32_tkAssocDestroy.c: Likewise.

	* rwlock.c: Split file into function segments.
	* pthread_rwlockattr_destroy.c: Separated routine from rwlock.c
	* pthread_rwlockattr_getpshared.c: Likewise.
	* pthread_rwlockattr_init.c: Likewise.
	* pthread_rwlockattr_setpshared.c: Likewise.
	* ptw32_rwlock_check_need_init.c: Likewise.
	* pthread_rwlock_destroy.c: Likewise.
	* pthread_rwlock_init.c: Likewise.
	* pthread_rwlock_rdlock.c: Likewise.
	* pthread_rwlock_tryrdlock.c: Likewise.
	* pthread_rwlock_trywrlock.c: Likewise.
	* pthread_rwlock_unlock.c: Likewise.
	* pthread_rwlock_wrlock.c: Likewise.

2002-02-10  Ross Johnson  <rpj at setup1.ise.canberra.edu.au

	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]

	* nonportable.c: Split file into function segments.
	* np_delay.c: Separated routine from nonportable.c
	* np_getw32threadhandle.c: Likewise.
	* np_mutexattr_setkind.c: Likewise.
	* np_mutexattr_getkind.c: Likewise.
	* np_num_processors.c: Likewise.
	* np_win32_attach_detach.c: Likewise.

	* misc.c: Split file into function segments.
	* pthread_equal.c: Separated routine from nonportable.c.
	* pthread_getconcurrency.c: Likewise.
	* pthread_once.c: Likewise.
	* pthread_self.c: Likewise.
	* pthread_setconcurrency.c: Likewise.
	* ptw32_calloc.c: Likewise.
	* ptw32_new.c: Likewise.
	* w32_CancelableWait.c: Likewise.
	
2002-02-09  Ross Johnson  <rpj at setup1.ise.canberra.edu.au

	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]

	* condvar.c: Split file into function segments.
	* pthread_condattr_destroy.c: Separated routine from condvar.c.
	* pthread_condattr_getpshared.c: Likewise.
	* pthread_condattr_init.c: Likewise.
	* pthread_condattr_setpshared.c: Likewise.
	* ptw32_cond_check_need_init.c: Likewise.
	* pthread_cond_destroy.c: Likewise.
	* pthread_cond_init.c: Likewise.
	* pthread_cond_signal.c: Likewise.
	* pthread_cond_wait.c: Likewise.
	
2002-02-07  Alexander Terekhov<TEREKHOV at de.ibm.com>

	* nonportable.c (pthread_delay_np): Make a true
	cancelation point. Deferred cancels will interrupt the
	wait.

2002-02-07  Ross Johnson  <rpj at setup1.ise.canberra.edu.au

	* misc.c (ptw32_new): Add creation of cancelEvent so that
	implicit POSIX threads (Win32 threads with a POSIX face)
	are cancelable; mainly so that pthread_delay_np doesn't fail
	if called from the main thread.
	* create.c (pthread_create): Remove creation of cancelEvent
	from here; now in ptw32_new().

	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]

	* barrier.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.
	* cancel.c: Likewise.
	* pthread_barrierattr_destroy.c: Separated routine from cancel.c.
	* pthread_barrierattr_getpshared.c: Likewise.
	* pthread_barrierattr_init.c: Likewise.
	* pthread_barrierattr_setpshared.c: Likewise.
	* pthread_barrier_destroy.c: Likewise.
	* pthread_barrier_init.c: Likewise.
	* pthread_barrier_wait.c: Likewise.
	* pthread_cancel.c: Likewise.
	* pthread_setcancelstate.c: Likewise.
	* pthread_setcanceltype.c: Likewise.
	* pthread_testcancel.c: Likewise.

2002-02-04  Max Woodbury <mtew at cds.duke.edu>

	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 <windows.h>
	header and related definitions with some combination