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Christoph M. Becker
bf1cfc0753
Cf. <https://github.com/php/php-src/pull/10220#issuecomment-1383739816>. This reverts commit68ada76f9a. his reverts commit45384c6e20. This reverts commitef7fbfd710. This reverts commit9b9ea0d7c6. This reverts commitf15747c26b. This reverts commite883ba93c4. This reverts commit7e87551c37. This reverts commit921274d2b8. This reverts commitfc1f528e5e. This reverts commit0961715cda. This reverts commita93f264526. This reverts commit72dd94e1c6. This reverts commit29b2dc8964. This reverts commit05c7653bba. This reverts commit5190e5c260. This reverts commit6b55bf228c. This reverts commit184b4a12d3. This reverts commit4c31b7888a. This reverts commitd44e9680f0. This reverts commit4069a5c43f.
69 lines
2.7 KiB
C
69 lines
2.7 KiB
C
/*
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+----------------------------------------------------------------------+
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| Copyright (c) The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.00 of the Zend 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.zend.com/license/2_00.txt. |
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| If you did not receive a copy of the Zend 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@zend.com so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: krakjoe@php.net |
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+----------------------------------------------------------------------+
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*/
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#ifndef ZEND_WEAKREFS_H
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#define ZEND_WEAKREFS_H
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#include "zend_alloc.h"
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BEGIN_EXTERN_C()
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extern ZEND_API zend_class_entry *zend_ce_weakref;
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void zend_register_weakref_ce(void);
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void zend_weakrefs_init(void);
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void zend_weakrefs_shutdown(void);
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ZEND_API void zend_weakrefs_notify(zend_object *object);
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ZEND_API zval *zend_weakrefs_hash_add(HashTable *ht, zend_object *key, zval *pData);
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ZEND_API zend_result zend_weakrefs_hash_del(HashTable *ht, zend_object *key);
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static zend_always_inline void *zend_weakrefs_hash_add_ptr(HashTable *ht, zend_object *key, void *ptr) {
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zval tmp, *zv;
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ZVAL_PTR(&tmp, ptr);
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if ((zv = zend_weakrefs_hash_add(ht, key, &tmp))) {
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return Z_PTR_P(zv);
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} else {
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return NULL;
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}
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}
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/* Because php uses the raw numbers as a hash function, raw pointers will lead to hash collisions.
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* We have a guarantee that the lowest ZEND_MM_ALIGNED_OFFSET_LOG2 bits of a pointer are zero.
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*
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* E.g. On most 64-bit platforms, pointers are aligned to 8 bytes, so the least significant 3 bits are always 0 and can be discarded.
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*
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* NOTE: This function is only used for EG(weakrefs) and zend_weakmap->ht.
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* It is not used for the HashTable instances associated with ZEND_WEAKREF_TAG_HT tags (created in zend_weakref_register, which uses ZEND_WEAKREF_ENCODE instead).
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* The ZEND_WEAKREF_TAG_HT instances are used to disambiguate between multiple weak references to the same zend_object.
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*/
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static zend_always_inline zend_ulong zend_object_to_weakref_key(const zend_object *object)
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{
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ZEND_ASSERT(((uintptr_t)object) % ZEND_MM_ALIGNMENT == 0);
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return ((uintptr_t) object) >> ZEND_MM_ALIGNMENT_LOG2;
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}
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static zend_always_inline zend_object *zend_weakref_key_to_object(zend_ulong key)
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{
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return (zend_object *) (((uintptr_t) key) << ZEND_MM_ALIGNMENT_LOG2);
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}
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END_EXTERN_C()
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#endif
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