// hash_func_t参数不再使用,保留仅是接口兼容. // typedef void (*dtor_func_t)(void *pDest); ZEND_API int _zend_hash_init(HashTable *ht, uint nSize, hash_func_t pHashFunction, dtor_func_t pDestructor, zend_bool persistent ZEND_FILE_LINE_DC) { uint i = 3; Bucket **tmp; SET_INCONSISTENT(HT_OK); if (nSize >= 0x80000000) { /* prevent overflow */ ht->nTableSize = 0x80000000; } else { // round操作 // i有最小值的 while ((1U << i) < nSize) { i++; } ht->nTableSize = 1 << i; } ht->nTableMask = ht->nTableSize - 1; // 通用的元素释放函数 ht->pDestructor = pDestructor; ht->arBuckets = NULL; ht->pListHead = NULL; ht->pListTail = NULL; ht->nNumOfElements = 0; ht->nNextFreeElement = 0; ht->pInternalPointer = NULL; ht->persistent = persistent; ht->nApplyCount = 0; ht->bApplyProtection = 1; /* Uses ecalloc() so that Bucket* == NULL */ if (persistent) { tmp = (Bucket **) calloc(ht->nTableSize, sizeof(Bucket *)); if (!tmp) { return FAILURE; } ht->arBuckets = tmp; } else { tmp = (Bucket **) ecalloc_rel(ht->nTableSize, sizeof(Bucket *)); if (tmp) { ht->arBuckets = tmp; } } return SUCCESS; }
/* {{{ _mysqlnd_ecalloc */ static void * _mysqlnd_ecalloc(unsigned int nmemb, size_t size MYSQLND_MEM_D) { void *ret; zend_bool collect_memory_statistics = MYSQLND_G(collect_memory_statistics); #if PHP_DEBUG zend_long * threshold = &MYSQLND_G(debug_ecalloc_fail_threshold); #endif TRACE_ALLOC_ENTER(mysqlnd_ecalloc_name); #if PHP_DEBUG { char * fn = strrchr(__zend_filename, PHP_DIR_SEPARATOR); TRACE_ALLOC_INF_FMT("file=%-15s line=%4d", fn? fn + 1:__zend_filename, __zend_lineno); } #endif TRACE_ALLOC_INF_FMT("before: %lu", zend_memory_usage(FALSE)); #if PHP_DEBUG /* -1 is also "true" */ if (*threshold) { #endif ret = ecalloc_rel(nmemb, REAL_SIZE(size)); #if PHP_DEBUG --*threshold; } else if (*threshold == 0) { ret = NULL; } #endif TRACE_ALLOC_INF_FMT("after : %lu", zend_memory_usage(FALSE)); TRACE_ALLOC_INF_FMT("size=%lu ptr=%p", size, ret); if (ret && collect_memory_statistics) { *(size_t *) ret = size; MYSQLND_INC_GLOBAL_STATISTIC_W_VALUE2(STAT_MEM_ECALLOC_COUNT, 1, STAT_MEM_ECALLOC_AMOUNT, size); } TRACE_ALLOC_RETURN(FAKE_PTR(ret)); }