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author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2006-11-15 14:08:49 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2006-11-15 14:08:49 +0000 |
commit | 047d67ab257600533bc3a1047a2a54d287dcc2d2 (patch) | |
tree | 1fc509d0e86d7998aa162912bb9c3d01a7606fed /cpukit/posix/src/prwlockwrlock.c | |
parent | Regenerate. (diff) | |
download | rtems-047d67ab257600533bc3a1047a2a54d287dcc2d2.tar.bz2 |
2006-11-15 Joel Sherrill <joel.sherrill@oarcorp.com>
* libcsupport/src/termios.c, posix/Makefile.am, posix/preinstall.am,
posix/include/rtems/posix/config.h, posix/include/rtems/posix/time.h,
sapi/src/posixapi.c, score/Makefile.am, score/preinstall.am,
score/include/rtems/score/corerwlock.h,
score/include/rtems/score/threadq.h,
score/src/corerwlockobtainread.c, score/src/threadqenqueue.c,
score/src/threadqtimeout.c: Adding POSIX barriers, POSIX spinlocks,
and partial implementation of POSIX rwlocks.
* posix/include/rtems/posix/barrier.h,
posix/include/rtems/posix/rwlock.h,
posix/include/rtems/posix/spinlock.h,
posix/inline/rtems/posix/barrier.inl,
posix/inline/rtems/posix/rwlock.inl,
posix/inline/rtems/posix/spinlock.inl,
posix/src/barrierattrdestroy.c, posix/src/barrierattrgetpshared.c,
posix/src/barrierattrinit.c, posix/src/barrierattrsetpshared.c,
posix/src/pbarrier.c, posix/src/pbarrierdestroy.c,
posix/src/pbarrierinit.c, posix/src/pbarriertranslatereturncode.c,
posix/src/pbarrierwait.c, posix/src/prwlock.c,
posix/src/prwlockdestroy.c, posix/src/prwlockinit.c,
posix/src/prwlockrdlock.c, posix/src/prwlocktimedrdlock.c,
posix/src/prwlocktimedwrlock.c,
posix/src/prwlocktranslatereturncode.c, posix/src/prwlocktryrdlock.c,
posix/src/prwlocktrywrlock.c, posix/src/prwlockunlock.c,
posix/src/prwlockwrlock.c, posix/src/pspin.c,
posix/src/pspindestroy.c, posix/src/pspininit.c,
posix/src/pspinlock.c, posix/src/pspinlocktranslatereturncode.c,
posix/src/pspintrylock.c, posix/src/pspinunlock.c,
posix/src/rwlockattrdestroy.c, posix/src/rwlockattrgetpshared.c,
posix/src/rwlockattrinit.c, posix/src/rwlockattrsetpshared.c: New files.
Diffstat (limited to 'cpukit/posix/src/prwlockwrlock.c')
-rw-r--r-- | cpukit/posix/src/prwlockwrlock.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/cpukit/posix/src/prwlockwrlock.c b/cpukit/posix/src/prwlockwrlock.c new file mode 100644 index 0000000000..dfacd90a30 --- /dev/null +++ b/cpukit/posix/src/prwlockwrlock.c @@ -0,0 +1,71 @@ +/* + * POSIX RWLock Manager -- Obtain a Write Lock on a RWLock Instance + * + * COPYRIGHT (c) 1989-2006. + * On-Line Applications Research Corporation (OAR). + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + * + * $Id$ + */ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#include <pthread.h> +#include <errno.h> + +#include <rtems/system.h> +#include <rtems/posix/rwlock.h> + +/* + * pthread_rwlock_wrlock + * + * This directive attempts to obtain a write only lock on an rwlock instance. + * + * Input parameters: + * rwlock - pointer to rwlock id + * + * Output parameters: + * 0 - if successful + * error code - if unsuccessful + */ + +int pthread_rwlock_wrlock( + pthread_rwlock_t *rwlock +) +{ + POSIX_RWLock_Control *the_rwlock; + Objects_Locations location; + + if ( !rwlock ) + return EINVAL; + + the_rwlock = _POSIX_RWLock_Get( rwlock, &location ); + switch ( location ) { + + case OBJECTS_REMOTE: + case OBJECTS_ERROR: + return EINVAL; + + case OBJECTS_LOCAL: + + _CORE_RWLock_Obtain_for_writing( + &the_rwlock->RWLock, + *rwlock, + FALSE, /* do not timeout -- wait forever */ + 0, + NULL + ); + + _Thread_Enable_dispatch(); + return _POSIX_RWLock_Translate_core_RWLock_return_code( + (CORE_RWLock_Status) _Thread_Executing->Wait.return_code + ); + } + + return POSIX_BOTTOM_REACHED(); +} |