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conditional compilation; refinements; bug fixes. See the ChangeLog.
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cancelation point. Deferred cancels will interrupt the
wait.
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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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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.
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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.
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* 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.
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* 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.
Contributed by - David Korn <dgk@research.att.com>
* 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.
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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.
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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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2000-12-28 Ross Johnson <rpj@special.ise.canberra.edu.au>
* 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 <rpj@special.ise.canberra.edu.au>
* FAQ: Update Answer 6 re getting a fully working
Mingw32 built library.
2000-09-09 Ross Johnson <rpj@special.ise.canberra.edu.au>
* pthread.h (ctime_r): Fix arg.
./tests/ChangeLog:
2000-12-28 Ross Johnson <rpj@special.ise.canberra.edu.au>
* eyal1.c: Increase thread work loads.
* exception2.c: New test.
* exception3.c: New test.
* Makefile: Add new tests exception2.c and exception3.c.
* GNUmakefile: Likewise.
2000-12-11 Ross Johnson <rpj@special.ise.canberra.edu.au>
* cleanup3.c: Remove unused variable.
* cleanup2.c: Likewise.
* exception1.c: Throw an exception rather than use
a deliberate zero divide so that catch(...) will
handle it under Mingw32. Mingw32 now builds the
library correctly to pass all tests - see Thomas
Pfaff's detailed instructions re needed changes
to Mingw32 in the Pthreads-Win32 FAQ.
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