// 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));
}
