mirror of
https://github.com/php/pecl-caching-apc.git
synced 2026-03-23 22:42:11 +01:00
112 lines
3.9 KiB
C
112 lines
3.9 KiB
C
/*
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+----------------------------------------------------------------------+
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| APC |
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+----------------------------------------------------------------------+
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| Copyright (c) 2006-2011 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Brian Shire <shire@php.net> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include "apc_pthreadmutex.h"
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#ifdef APC_PTHREADMUTEX_LOCKS
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pthread_mutex_t *apc_pthreadmutex_create(pthread_mutex_t *lock TSRMLS_DC)
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{
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int result;
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pthread_mutexattr_t* attr;
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attr = malloc(sizeof(pthread_mutexattr_t));
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result = pthread_mutexattr_init(attr);
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if(result == ENOMEM) {
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apc_error("pthread mutex error: Insufficient memory exists to create the mutex attribute object." TSRMLS_CC);
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} else if(result == EINVAL) {
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apc_error("pthread mutex error: attr does not point to writeable memory." TSRMLS_CC);
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} else if(result == EFAULT) {
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apc_error("pthread mutex error: attr is an invalid pointer." TSRMLS_CC);
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}
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#ifdef PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
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result = pthread_mutexattr_settype(attr, PTHREAD_MUTEX_ADAPTIVE_NP);
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if (result == EINVAL) {
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apc_error("pthread_mutexattr_settype: unable to set adaptive mutexes" TSRMLS_CC);
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}
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#endif
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/* pthread_mutexattr_settype(attr, PTHREAD_MUTEX_ERRORCHECK); */
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result = pthread_mutexattr_setpshared(attr, PTHREAD_PROCESS_SHARED);
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if(result == EINVAL) {
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apc_error("pthread mutex error: attr is not an initialized mutex attribute object, or pshared is not a valid process-shared state setting." TSRMLS_CC);
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} else if(result == EFAULT) {
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apc_error("pthread mutex error: attr is an invalid pointer." TSRMLS_CC);
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} else if(result == ENOTSUP) {
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apc_error("pthread mutex error: pshared was set to PTHREAD_PROCESS_SHARED." TSRMLS_CC);
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}
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if(pthread_mutex_init(lock, attr)) {
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apc_error("unable to initialize pthread lock" TSRMLS_CC);
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}
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return lock;
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}
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void apc_pthreadmutex_destroy(pthread_mutex_t *lock)
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{
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return; /* we don't actually destroy the mutex, as it would destroy it for all processes */
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}
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void apc_pthreadmutex_lock(pthread_mutex_t *lock TSRMLS_DC)
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{
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int result;
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result = pthread_mutex_lock(lock);
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if(result == EINVAL) {
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apc_error("unable to obtain pthread lock (EINVAL)" TSRMLS_CC);
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} else if(result == EDEADLK) {
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apc_error("unable to obtain pthread lock (EDEADLK)" TSRMLS_CC);
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}
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}
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void apc_pthreadmutex_unlock(pthread_mutex_t *lock TSRMLS_DC)
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{
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if(pthread_mutex_unlock(lock)) {
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apc_error("unable to unlock pthread lock" TSRMLS_CC);
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}
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}
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zend_bool apc_pthreadmutex_nonblocking_lock(pthread_mutex_t *lock TSRMLS_DC)
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{
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int rval;
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rval = pthread_mutex_trylock(lock);
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if(rval == EBUSY) { /* Lock is already held */
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return 0;
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} else if(rval == 0) { /* Obtained lock */
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return 1;
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} else { /* Other error */
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apc_error("unable to obtain pthread trylock" TSRMLS_CC);
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return 0;
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}
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}
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#endif
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim>600: expandtab sw=4 ts=4 sts=4 fdm=marker
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* vim<600: expandtab sw=4 ts=4 sts=4
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*/
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