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conditional compilation; refinements; bug fixes. See the ChangeLog.
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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().
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* 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@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@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.
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Remove unused autoconf files;
Add the file COPYING, which describes the pthread-win32 license
relative to the FSF LGPL.
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the calloc NULL check was left in the conditionally included section.
(sem_destroy): Likewise, the calloced sem_t wasn't being freed.
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in conditionally compiled code. Only older versions of
WinCE require this code, hence it doesn't normally get
tested.
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Update ANNOUNCE to get ready for new snapshot.
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in instead.
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Contributed by - 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.
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* implement.h (sem_t_): Likewise.
* semaphore.c: Likewise.
* private.c (ptw32_sem_timedwait): Updated to use new
opaque sem_t.
tests/
* mutex5.c: Insert inert change to quell compiler warnings.
* condvar3_2.c: Remove unused variable.
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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.
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* 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 Ross Johnson <rpj@setup1.ise.canberra.edu.au>
Contributed by - Milan Gardian <Milan.Gardian@LEIBINGER.com>
* 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 Ross Johnson <rpj@setup1.ise.canberra.edu.au>
Contributed by - Thomas Pfaff <tpfaff@gmx.net>
* 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 Ross Johnson <rpj@special.ise.canberra.edu.au>
Contributed by - Alexander Terekhov <TEREKHOV@de.ibm.com>
* 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].
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* 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.
(cond_wait_cleanup*): Rename to ptw32_cond_wait_cleanup*.
(ptw32_cond_timedwait): Add comments.
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* 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).
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* 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.
- Tristan Savatier <tristan@mpegtv.com>
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Sat May 8 09:42:30 1999 Ross Johnson <rpj@ixobrychus.canberra.edu.au>
* 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 <rpj@ixobrychus.canberra.edu.au>
* semaphore.c (sem_open): New function; returns an error (ENOSYS).
(sem_close): ditto.
(sem_unlink): ditto.
(sem_getvalue): ditto.
* semaphore.h (_POSIX_SEMAPHORES): define.
./tests/ChangeLog
Sat May 29 23:29:04 1999 Ross Johnson <rpj@ixobrychus.canberra.edu.au>
* runall.bat (condvar5): Add new test.
* runall.bat (condvar6): Add new test.
* Makefile (condvar5) : Add new test.
* Makefile (condvar6) : Add new test.
* condvar5.c: New test for pthread_cond_broadcast().
* condvar6.c: New test for pthread_cond_broadcast().
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Sun Apr 4 11:05:57 1999 Ross Johnson <rpj@ixobrychus.canberra.edu.au>
* 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 (_pthread_sem_*): Rename to sem_*; except for
_pthread_sem_timedwait which is an private function.
Sat Apr 3 23:28:00 1999 Ross Johnson <rpj@ixobrychus.canberra.edu.au>
* Makefile.in (OBJS): Add errno.o.
Fri Apr 2 11:08:50 1999 Ross Johnson <rpj@ixobrychus.canberra.edu.au>
* implement.h (_pthread_sem_*): Remove prototypes now defined in
semaphore.h.
* pthread.h (sempahore.h): Include.
* semaphore.h: New file for POSIX 1b semaphores.
* pthread.h (_pthread_sem_t): Change to sem_t.
* semaphore.c (_pthread_sem_*): Change to sem_*; these functions
will be exported from the library; set errno on error.
- John Bossom <jebossom@cognos.com>
(_pthread_sem_timedwait): Moved to private.c.
* private.c (_pthread_sem_timedwait): Moved from semaphore.c;
set errno on error.
* errno.c (_errno): New file. New function.
- John Bossom
* pthread.h (pthread_t_): Add per-thread errno element.
tests/ChangeLog
Sun Apr 4 12:04:28 1999 Ross Johnson <rpj@ixobrychus.canberra.edu.au>
* tsd1.c (mythread): Change Sleep(0) to sched_yield().
(sched.h): Include.
* condvar3.c (mythread): Remove redundant Sleep().
* runtest.bat: Re-organised to make more informative.
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* semaphore.c (_pthread_sem_timedwait): Check for negative
milliseconds.
- Tor Lillqvist <tml@iki.fi>
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* all: Add GNU LGPL and Copyright and Warranty.
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* 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 (_pthread_sem_timedwait): Check sem == NULL earlier.
Sun Mar 7 12:31:14 1999 Ross Johnson <rpj@ixobrychus.canberra.edu.au>
* 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 (_pthread_cond_test_init_lock): Initialise and destroy.
* implement.h (_pthread_cond_test_init_lock): Add extern.
* global.c (_pthread_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.
tests/ChangeLog
Sun Mar 7 10:41:52 1999 Ross Johnson <rpj@ixobrychus.canberra.edu.au>
* Makefile (condvar3, condvar4): Add tests.
* condvar4.c (General): Reduce to simple test case; prerequisite
is condvar3.c; add description.
* condvar3.c (General): Reduce to simple test case; prerequisite
is condvar2.c; add description.
* condvar2.c (General): Reduce to simple test case; prerequisite
is condvar1.c; add description.
* condvar1.c (General): Reduce to simple test case; add
description.
* Template.c (Comments): Add generic test detail.
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* semaphore.c: Comment format changes.
Wed Feb 3 13:04:44 1999 Ross Johnson <rpj@swan.canberra.edu.au>
* cleanup.c: Rename _pthread_*_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().
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Tue Feb 2 18:07:43 1999 Ross Johnson <rpj@swan.canberra.edu.au>
* implement.h: Add #include <pthread.h>.
Change sem_t to _pthread_sem_t.
Various patches by Kevin Ruland <Kevin.Ruland@anheuser-busch.com>
* signal.c (pthread_sigmask): Add and modify casts.
Reverse LHS/RHS bitwise assignments.
* pthread.h: Remove #include <semaphore.h>.
(_PTHREAD_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 _pthread_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 <rpj@swan.canberra.edu.au>
* Makefile.in (OBJS): Add semaphore.o to list.
* semaphore.c (_pthread_sem_timedwait): Move from private.c.
Rename sem_* to _pthread_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 ename all
functions to prepend '_pthread_'. They are
now private to the pthreads-win32 implementation.
* private.c: Change #warning.
Move _pthread_sem_timedwait() to semaphore.c.
* cleanup.c: Change #warning.
* misc.c: Remove #include <errno.h>
* pthread.def: Cleanup CVS merge conflicts.
* global.c: Ditto.
* ChangeLog: Ditto.
* cleanup.c: Ditto.
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Sun Jan 24 01:34:52 1999 Ross Johnson <rpj@ixobrychus.canberra.edu.au>
* semaphore.c (sem_wait): Remove second arg to
pthreadCancelableWait() call.
Fri Jan 22 14:31:59 1999 Ross Johnson <rpj@swan.canberra.edu.au>
* 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 (_pthread_callUserDestroyRoutines): Redo conditional
compilation.
* misc.c (CancelableWait): C++ version uses 'throw'.
* cancel.c (pthread_testcancel): Ditto.
* implement.h (class pthread_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.
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* private.c (_pthread_sem_timedwait): Move from semaphore.c.
* semaphore.c : Remove redundant #includes.
(_pthread_sem_timedwait): Move to private.c.
(sem_wait): Add missing abstime arg to pthreadCancelableWait() call.
1999-01-17 Ross Johnson <rpj@ise.canberra.edu.au>
* runtest: New script to build and run a test in the tests directory.
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* 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 _pthread_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 (_pthread_sem_timedwait): New internal function
prototype.
* misc.c (pthreadCancelableWait): Added new 'abstime' argument
to allow shorter than INFINITE wait.
* semaphore.c (_pthread_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().
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* build.bat: Delete old binaries before compiling/linking.
Tue Jan 12 09:58:38 1999 Ross Johnson <rpj@ixobrychus.canberra.edu.au>
* dll.c: The Microsoft compiler pragmas probably are more
appropriately protected by _MSC_VER than by _WIN32.
- Tor Lillqvist <tml@iki.fi>.
* condvar.c (pthread_cond_timedwait): Fix function description
comments.
* 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.
- Tor Lillqvist <tml@iki.fi>.
* pthread.def: pthread_mutex_destroy was missing from the def file
- Tor Lillqvist <tml@iki.fi>.
* 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.
- Tor Lillqvist <tml@iki.fi>.
* semaphore.c (sem_post): Correct typo in comment.
Mon Jan 11 20:33:19 1999 Ross Johnson <rpj@ixobrychus.canberra.edu.au>
* pthread.h: Re-arrange conditional compile of pthread_cleanup-*
macros.
* cleanup.c (_pthread_push_cleanup): Provide conditional
compile of cleanup->prev.
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This will be tagged as snapshot-1999-01-04-1305
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