diff options
author | marha <marha@users.sourceforge.net> | 2011-07-18 10:51:09 +0200 |
---|---|---|
committer | marha <marha@users.sourceforge.net> | 2011-07-18 10:51:09 +0200 |
commit | 3c0d2312573b81e3067bea610a58b1940c075e05 (patch) | |
tree | 3f025a27d813374f225957801226aa8ee829a33a /pthreads/pthread_rwlock_destroy.c | |
parent | ba033884541714680fd7552ab9d6c8817650f7d8 (diff) | |
parent | 88101146f2ec7d53ffb793e365f05097ffd35fd3 (diff) | |
download | vcxsrv-3c0d2312573b81e3067bea610a58b1940c075e05.tar.gz vcxsrv-3c0d2312573b81e3067bea610a58b1940c075e05.tar.bz2 vcxsrv-3c0d2312573b81e3067bea610a58b1940c075e05.zip |
Merge remote-tracking branch 'origin/released'
Conflicts:
X11/Xfuncproto.h.in
X11/configure.ac
X11/keysymdef.h
freetype/include/freetype/internal/pcftypes.h
freetype/src/cache/ftcbasic.c
freetype/src/cache/ftccmap.c
mesalib/src/glsl/ir.h
mesalib/src/glsl/link_functions.cpp
mesalib/src/mesa/main/dlist.c
mesalib/src/mesa/program/prog_optimize.c
mesalib/src/mesa/state_tracker/st_program.c
pthreads/Makefile
Diffstat (limited to 'pthreads/pthread_rwlock_destroy.c')
-rw-r--r-- | pthreads/pthread_rwlock_destroy.c | 285 |
1 files changed, 143 insertions, 142 deletions
diff --git a/pthreads/pthread_rwlock_destroy.c b/pthreads/pthread_rwlock_destroy.c index bc7889e55..245a89241 100644 --- a/pthreads/pthread_rwlock_destroy.c +++ b/pthreads/pthread_rwlock_destroy.c @@ -1,142 +1,143 @@ -/*
- * pthread_rwlock_destroy.c
- *
- * Description:
- * This translation unit implements read/write lock primitives.
- *
- * --------------------------------------------------------------------------
- *
- * Pthreads-win32 - POSIX Threads Library for Win32
- * Copyright(C) 1998 John E. Bossom
- * Copyright(C) 1999,2005 Pthreads-win32 contributors
- *
- * Contact Email: rpj@callisto.canberra.edu.au
- *
- * The current list of contributors is contained
- * in the file CONTRIBUTORS included with the source
- * code distribution. The list can also be seen at the
- * following World Wide Web location:
- * http://sources.redhat.com/pthreads-win32/contributors.html
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library in the file COPYING.LIB;
- * if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
- */
-
-#include <limits.h>
-
-#include "pthread.h"
-#include "implement.h"
-
-int
-pthread_rwlock_destroy (pthread_rwlock_t * rwlock)
-{
- pthread_rwlock_t rwl;
- int result = 0, result1 = 0, result2 = 0;
-
- if (rwlock == NULL || *rwlock == NULL)
- {
- return EINVAL;
- }
-
- if (*rwlock != PTHREAD_RWLOCK_INITIALIZER)
- {
- rwl = *rwlock;
-
- if (rwl->nMagic != PTW32_RWLOCK_MAGIC)
- {
- return EINVAL;
- }
-
- if ((result = pthread_mutex_lock (&(rwl->mtxExclusiveAccess))) != 0)
- {
- return result;
- }
-
- if ((result =
- pthread_mutex_lock (&(rwl->mtxSharedAccessCompleted))) != 0)
- {
- (void) pthread_mutex_unlock (&(rwl->mtxExclusiveAccess));
- return result;
- }
-
- /*
- * Check whether any threads own/wait for the lock (wait for ex.access);
- * report "BUSY" if so.
- */
- if (rwl->nExclusiveAccessCount > 0
- || rwl->nSharedAccessCount > rwl->nCompletedSharedAccessCount)
- {
- result = pthread_mutex_unlock (&(rwl->mtxSharedAccessCompleted));
- result1 = pthread_mutex_unlock (&(rwl->mtxExclusiveAccess));
- result2 = EBUSY;
- }
- else
- {
- rwl->nMagic = 0;
-
- if ((result =
- pthread_mutex_unlock (&(rwl->mtxSharedAccessCompleted))) != 0)
- {
- pthread_mutex_unlock (&rwl->mtxExclusiveAccess);
- return result;
- }
-
- if ((result =
- pthread_mutex_unlock (&(rwl->mtxExclusiveAccess))) != 0)
- {
- return result;
- }
-
- *rwlock = NULL; /* Invalidate rwlock before anything else */
- result = pthread_cond_destroy (&(rwl->cndSharedAccessCompleted));
- result1 = pthread_mutex_destroy (&(rwl->mtxSharedAccessCompleted));
- result2 = pthread_mutex_destroy (&(rwl->mtxExclusiveAccess));
- (void) free (rwl);
- }
- }
- else
- {
- /*
- * See notes in ptw32_rwlock_check_need_init() above also.
- */
- EnterCriticalSection (&ptw32_rwlock_test_init_lock);
-
- /*
- * Check again.
- */
- if (*rwlock == PTHREAD_RWLOCK_INITIALIZER)
- {
- /*
- * This is all we need to do to destroy a statically
- * initialised rwlock that has not yet been used (initialised).
- * If we get to here, another thread
- * waiting to initialise this rwlock will get an EINVAL.
- */
- *rwlock = NULL;
- }
- else
- {
- /*
- * The rwlock has been initialised while we were waiting
- * so assume it's in use.
- */
- result = EBUSY;
- }
-
- LeaveCriticalSection (&ptw32_rwlock_test_init_lock);
- }
-
- return ((result != 0) ? result : ((result1 != 0) ? result1 : result2));
-}
+/* + * pthread_rwlock_destroy.c + * + * Description: + * This translation unit implements read/write lock primitives. + * + * -------------------------------------------------------------------------- + * + * Pthreads-win32 - POSIX Threads Library for Win32 + * Copyright(C) 1998 John E. Bossom + * Copyright(C) 1999,2005 Pthreads-win32 contributors + * + * Contact Email: rpj@callisto.canberra.edu.au + * + * The current list of contributors is contained + * in the file CONTRIBUTORS included with the source + * code distribution. The list can also be seen at the + * following World Wide Web location: + * http://sources.redhat.com/pthreads-win32/contributors.html + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library in the file COPYING.LIB; + * if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ + +#include <limits.h> + +#include "pthread.h" +#include "implement.h" + +int +pthread_rwlock_destroy (pthread_rwlock_t * rwlock) +{ + pthread_rwlock_t rwl; + int result = 0, result1 = 0, result2 = 0; + + if (rwlock == NULL || *rwlock == NULL) + { + return EINVAL; + } + + if (*rwlock != PTHREAD_RWLOCK_INITIALIZER) + { + rwl = *rwlock; + + if (rwl->nMagic != PTW32_RWLOCK_MAGIC) + { + return EINVAL; + } + + if ((result = pthread_mutex_lock (&(rwl->mtxExclusiveAccess))) != 0) + { + return result; + } + + if ((result = + pthread_mutex_lock (&(rwl->mtxSharedAccessCompleted))) != 0) + { + (void) pthread_mutex_unlock (&(rwl->mtxExclusiveAccess)); + return result; + } + + /* + * Check whether any threads own/wait for the lock (wait for ex.access); + * report "BUSY" if so. + */ + if (rwl->nExclusiveAccessCount > 0 + || rwl->nSharedAccessCount > rwl->nCompletedSharedAccessCount) + { + result = pthread_mutex_unlock (&(rwl->mtxSharedAccessCompleted)); + result1 = pthread_mutex_unlock (&(rwl->mtxExclusiveAccess)); + result2 = EBUSY; + } + else + { + rwl->nMagic = 0; + + if ((result = + pthread_mutex_unlock (&(rwl->mtxSharedAccessCompleted))) != 0) + { + pthread_mutex_unlock (&rwl->mtxExclusiveAccess); + return result; + } + + if ((result = + pthread_mutex_unlock (&(rwl->mtxExclusiveAccess))) != 0) + { + return result; + } + + *rwlock = NULL; /* Invalidate rwlock before anything else */ + result = pthread_cond_destroy (&(rwl->cndSharedAccessCompleted)); + result1 = pthread_mutex_destroy (&(rwl->mtxSharedAccessCompleted)); + result2 = pthread_mutex_destroy (&(rwl->mtxExclusiveAccess)); + (void) free (rwl); + } + } + else + { + ptw32_mcs_local_node_t node; + /* + * See notes in ptw32_rwlock_check_need_init() above also. + */ + ptw32_mcs_lock_acquire(&ptw32_rwlock_test_init_lock, &node); + + /* + * Check again. + */ + if (*rwlock == PTHREAD_RWLOCK_INITIALIZER) + { + /* + * This is all we need to do to destroy a statically + * initialised rwlock that has not yet been used (initialised). + * If we get to here, another thread + * waiting to initialise this rwlock will get an EINVAL. + */ + *rwlock = NULL; + } + else + { + /* + * The rwlock has been initialised while we were waiting + * so assume it's in use. + */ + result = EBUSY; + } + + ptw32_mcs_lock_release(&node); + } + + return ((result != 0) ? result : ((result1 != 0) ? result1 : result2)); +} |