mirror of
https://github.com/php/php-src.git
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142 lines
4.1 KiB
C
142 lines
4.1 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP Version 6 |
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+----------------------------------------------------------------------+
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| Copyright (c) 2006-2008 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: Georg Richter <georg@mysql.com> |
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| Andrey Hristov <andrey@mysql.com> |
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| Ulf Wendel <uwendel@mysql.com> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include "php.h"
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#include "mysqlnd.h"
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#include "mysqlnd_priv.h"
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#include "mysqlnd_statistics.h"
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#define MYSQLND_SILENT
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#ifdef ZTS
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#define LOCK_QCACHE(cache) tsrm_mutex_lock((cache)->LOCK_access)
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#define UNLOCK_QCACHE(cache) tsrm_mutex_unlock((cache)->LOCK_access)
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#else
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#define LOCK_QCACHE(cache)
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#define UNLOCK_QCACHE(cache)
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#endif
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/* {{{ mysqlnd_qcache_init_cache */
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PHPAPI MYSQLND_QCACHE * mysqlnd_qcache_init_cache()
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{
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MYSQLND_QCACHE *cache = calloc(1, sizeof(MYSQLND_QCACHE));
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#ifndef MYSQLND_SILENT
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php_printf("[mysqlnd_qcache_init_cache %p]\n", cache);
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#endif
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cache->references = 1;
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#ifdef ZTS
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cache->LOCK_access = tsrm_mutex_alloc();
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#endif
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cache->ht = malloc(sizeof(HashTable));
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zend_hash_init(cache->ht, 10 /* init_elements */, NULL, NULL, TRUE /*pers*/);
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return cache;
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}
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/* }}} */
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/* {{{ mysqlnd_qcache_get_cache_reference */
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PHPAPI MYSQLND_QCACHE * mysqlnd_qcache_get_cache_reference(MYSQLND_QCACHE * const cache)
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{
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if (cache) {
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#ifndef MYSQLND_SILENT
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php_printf("[mysqlnd_qcache_get_cache_reference %p will become %d]\n", cache, cache->references+1);
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#endif
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LOCK_QCACHE(cache);
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cache->references++;
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UNLOCK_QCACHE(cache);
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}
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return cache;
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}
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/* }}} */
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/* {{{ mysqlnd_qcache_free_cache */
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/*
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As this call will happen on MSHUTDOWN(), then we don't need to copy the zvals with
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copy_ctor but scrap what they point to with zval_dtor() and then just free our
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pre-allocated block. Precondition is that we ZVAL_NULL() the zvals when we put them
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to the free list after usage. We ZVAL_NULL() them when we allocate them in the
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constructor of the cache.
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*/
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static
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void mysqlnd_qcache_free_cache(MYSQLND_QCACHE *cache)
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{
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#ifndef MYSQLND_SILENT
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php_printf("[mysqlnd_qcache_free_cache %p]\n", cache);
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#endif
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#ifdef ZTS
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tsrm_mutex_free(cache->LOCK_access);
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#endif
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zend_hash_destroy(cache->ht);
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free(cache->ht);
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free(cache);
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}
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/* }}} */
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/* {{{ mysqlnd_qcache_free_cache_reference */
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PHPAPI void mysqlnd_qcache_free_cache_reference(MYSQLND_QCACHE **cache)
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{
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if (*cache) {
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zend_bool to_free;
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#ifndef MYSQLND_SILENT
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php_printf("[mysqlnd_qcache_free_cache_reference %p] refs=%d\n", *cache, (*cache)->references);
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#endif
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LOCK_QCACHE(*cache);
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to_free = --(*cache)->references == 0;
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/* Unlock before destroying */
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UNLOCK_QCACHE(*cache);
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if (to_free) {
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mysqlnd_qcache_free_cache(*cache);
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}
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*cache = NULL;
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}
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}
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/* }}} */
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/* {{{ mysqlnd_qcache_free_cache_reference */
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PHPAPI void mysqlnd_qcache_stats(const MYSQLND_QCACHE * const cache, zval *return_value)
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{
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if (cache) {
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LOCK_QCACHE(cache);
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array_init(return_value);
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add_assoc_long_ex(return_value, "references", sizeof("references"), cache->references);
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UNLOCK_QCACHE(cache);
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} else {
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ZVAL_NULL(return_value);
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}
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}
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/* }}} */
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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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* vim600: noet sw=4 ts=4 fdm=marker
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* vim<600: noet sw=4 ts=4
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*/
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