C++ (Cpp) CONNECT_TO_BUCKET_DLLIST Examples

Example #1

File: zend_hash.c Project: do-aki/petipeti

ZEND_API int zend_hash_rehash(HashTable *ht)
{
	Bucket *p;
	uint nIndex;

	IS_CONSISTENT(ht);
	if (UNEXPECTED(ht->nNumOfElements == 0)) {
		return SUCCESS;
	}

	memset(ht->arBuckets, 0, ht->nTableSize * sizeof(Bucket *));
	p = ht->pListHead;
	while (p != NULL) {
		nIndex = p->h & ht->nTableMask;
		CONNECT_TO_BUCKET_DLLIST(p, ht->arBuckets[nIndex]);
		ht->arBuckets[nIndex] = p;
		p = p->pListNext;
	}
	return SUCCESS;
}

Example #2

File: zend_hash.c Project: biezaideng/read-php-src

/* 对哈希表进行重新哈希操作 */
ZEND_API int zend_hash_rehash(HashTable *ht)
{
	Bucket *p;
	uint nIndex;

	IS_CONSISTENT(ht);
	if (UNEXPECTED(ht->nNumOfElements == 0)) {
		return SUCCESS;
	}
	/* 先将arBuckets重新初始化为0 */
	memset(ht->arBuckets, 0, ht->nTableSize * sizeof(Bucket *));
	/* p指向pListHead，pListHead指向数组的第一个元素，保存这个指针在重新哈希的时候也非常有用
	 */
	p = ht->pListHead;
	while (p != NULL) {
		/* 逐个计算下标然后添加到相同哈希值的bucket中 */
		nIndex = p->h & ht->nTableMask;
		CONNECT_TO_BUCKET_DLLIST(p, ht->arBuckets[nIndex]);
		ht->arBuckets[nIndex] = p;
		p = p->pListNext;
	}
	return SUCCESS;
}

Example #3

File: zend_hash.c Project: kmiku7/php-5.6.10-annotated

ZEND_API void zend_hash_reindex(HashTable *ht, zend_bool only_integer_keys) {
	Bucket *p;
	uint nIndex;
	ulong offset = 0;

	IS_CONSISTENT(ht);
	if (UNEXPECTED(ht->nNumOfElements == 0)) {
		ht->nNextFreeElement = 0;
		return;
	}

	memset(ht->arBuckets, 0, ht->nTableSize * sizeof(Bucket *));
	for (p = ht->pListHead; p != NULL; p = p->pListNext) {
		if (!only_integer_keys || p->nKeyLength == 0) {
			p->h = offset++;
			p->nKeyLength = 0;
		}

		nIndex = p->h & ht->nTableMask;
		CONNECT_TO_BUCKET_DLLIST(p, ht->arBuckets[nIndex]);
		ht->arBuckets[nIndex] = p;
	}
	ht->nNextFreeElement = offset;
}

Example #4

File: zend_hash.c Project: rogerhu/dd-wrt

ZEND_API int _zend_hash_index_update_or_next_insert(HashTable *ht, ulong h, void *pData, uint nDataSize, void **pDest, int flag ZEND_FILE_LINE_DC)
{
    uint nIndex;
    Bucket *p;
#ifdef ZEND_SIGNALS
    TSRMLS_FETCH();
#endif

    IS_CONSISTENT(ht);
    CHECK_INIT(ht);

    if (flag & HASH_NEXT_INSERT) {
        h = ht->nNextFreeElement;
    }
    nIndex = h & ht->nTableMask;

    p = ht->arBuckets[nIndex];
    while (p != NULL) {
        if ((p->nKeyLength == 0) && (p->h == h)) {
            if (flag & HASH_NEXT_INSERT || flag & HASH_ADD) {
                return FAILURE;
            }
            HANDLE_BLOCK_INTERRUPTIONS();
#if ZEND_DEBUG
            if (p->pData == pData) {
                ZEND_PUTS("Fatal error in zend_hash_index_update: p->pData == pData\n");
                HANDLE_UNBLOCK_INTERRUPTIONS();
                return FAILURE;
            }
#endif
            if (ht->pDestructor) {
                ht->pDestructor(p->pData);
            }
            UPDATE_DATA(ht, p, pData, nDataSize);
            HANDLE_UNBLOCK_INTERRUPTIONS();
            if ((long)h >= (long)ht->nNextFreeElement) {
                ht->nNextFreeElement = h < LONG_MAX ? h + 1 : LONG_MAX;
            }
            if (pDest) {
                *pDest = p->pData;
            }
            return SUCCESS;
        }
        p = p->pNext;
    }
    p = (Bucket *) pemalloc_rel(sizeof(Bucket), ht->persistent);
    if (!p) {
        return FAILURE;
    }
    p->arKey = NULL;
    p->nKeyLength = 0; /* Numeric indices are marked by making the nKeyLength == 0 */
    p->h = h;
    INIT_DATA(ht, p, pData, nDataSize);
    if (pDest) {
        *pDest = p->pData;
    }

    CONNECT_TO_BUCKET_DLLIST(p, ht->arBuckets[nIndex]);

    HANDLE_BLOCK_INTERRUPTIONS();
    ht->arBuckets[nIndex] = p;
    CONNECT_TO_GLOBAL_DLLIST(p, ht);
    HANDLE_UNBLOCK_INTERRUPTIONS();

    if ((long)h >= (long)ht->nNextFreeElement) {
        ht->nNextFreeElement = h < LONG_MAX ? h + 1 : LONG_MAX;
    }
    ht->nNumOfElements++;
    ZEND_HASH_IF_FULL_DO_RESIZE(ht);
    return SUCCESS;
}

Example #5

File: zend_hash.c Project: rogerhu/dd-wrt

ZEND_API int _zend_hash_quick_add_or_update(HashTable *ht, const char *arKey, uint nKeyLength, ulong h, void *pData, uint nDataSize, void **pDest, int flag ZEND_FILE_LINE_DC)
{
    uint nIndex;
    Bucket *p;
#ifdef ZEND_SIGNALS
    TSRMLS_FETCH();
#endif

    IS_CONSISTENT(ht);

    if (nKeyLength == 0) {
        return zend_hash_index_update(ht, h, pData, nDataSize, pDest);
    }

    CHECK_INIT(ht);
    nIndex = h & ht->nTableMask;

    p = ht->arBuckets[nIndex];
    while (p != NULL) {
        if (p->arKey == arKey ||
                ((p->h == h) && (p->nKeyLength == nKeyLength) && !memcmp(p->arKey, arKey, nKeyLength))) {
            if (flag & HASH_ADD) {
                return FAILURE;
            }
            HANDLE_BLOCK_INTERRUPTIONS();
#if ZEND_DEBUG
            if (p->pData == pData) {
                ZEND_PUTS("Fatal error in zend_hash_update: p->pData == pData\n");
                HANDLE_UNBLOCK_INTERRUPTIONS();
                return FAILURE;
            }
#endif
            if (ht->pDestructor) {
                ht->pDestructor(p->pData);
            }
            UPDATE_DATA(ht, p, pData, nDataSize);
            if (pDest) {
                *pDest = p->pData;
            }
            HANDLE_UNBLOCK_INTERRUPTIONS();
            return SUCCESS;
        }
        p = p->pNext;
    }

    if (IS_INTERNED(arKey)) {
        p = (Bucket *) pemalloc(sizeof(Bucket), ht->persistent);
        if (!p) {
            return FAILURE;
        }
        p->arKey = arKey;
    } else {
        p = (Bucket *) pemalloc(sizeof(Bucket) + nKeyLength, ht->persistent);
        if (!p) {
            return FAILURE;
        }
        p->arKey = (const char*)(p + 1);
        memcpy((char*)p->arKey, arKey, nKeyLength);
    }

    p->nKeyLength = nKeyLength;
    INIT_DATA(ht, p, pData, nDataSize);
    p->h = h;

    CONNECT_TO_BUCKET_DLLIST(p, ht->arBuckets[nIndex]);

    if (pDest) {
        *pDest = p->pData;
    }

    HANDLE_BLOCK_INTERRUPTIONS();
    ht->arBuckets[nIndex] = p;
    CONNECT_TO_GLOBAL_DLLIST(p, ht);
    HANDLE_UNBLOCK_INTERRUPTIONS();

    ht->nNumOfElements++;
    ZEND_HASH_IF_FULL_DO_RESIZE(ht);		/* If the Hash table is full, resize it */
    return SUCCESS;
}

Example #6

File: zend_hash.c Project: biezaideng/read-php-src

/* 数字键值的插入修改 */
ZEND_API int _zend_hash_index_update_or_next_insert(HashTable *ht, ulong h,
						    void *pData, uint nDataSize,
						    void **pDest,
						    int flag ZEND_FILE_LINE_DC)
{
	uint nIndex;
	Bucket *p;
#ifdef ZEND_SIGNALS
	TSRMLS_FETCH();
#endif

	IS_CONSISTENT(ht); // 调试信息
	CHECK_INIT(ht);

	// 如果是新增元素，则h等于下一个数字索引的位置
	if (flag & HASH_NEXT_INSERT) {
		h = ht->nNextFreeElement;
	}
	// 计算键值在HashTable中的存储位置为nIndex
	nIndex = h & ht->nTableMask;

	p = ht->arBuckets[nIndex]; /* 取得索引对应的Bucket的指针 */
	// 循环Bucket中含有nIndex键值的链表
	while (p != NULL) {
		// p 不为NULL说明Bucket中存在键值为nIndex的元素
		if ((p->nKeyLength == 0) &&
		    (p->h == h)) { // 如果是数字键值且键值相同
			if (flag & HASH_NEXT_INSERT ||
			    flag & HASH_ADD) { // 如果是新增元素，则插入失败
				return FAILURE;
			}
			HANDLE_BLOCK_INTERRUPTIONS();
#if ZEND_DEBUG
			if (p->pData == pData) {
				ZEND_PUTS("Fatal error in "
					  "zend_hash_index_update: p->pData == "
					  "pData\n");
				HANDLE_UNBLOCK_INTERRUPTIONS();
				return FAILURE;
			}
#endif
			// 上面的代码return ，说明是更新Bucket中已有键值元素值
			if (ht->pDestructor) { // 如果数据元素存在，则将原来的数据销毁
				ht->pDestructor(p->pData);
			}
			UPDATE_DATA(ht, p, pData, nDataSize); // 更新数据值
			HANDLE_UNBLOCK_INTERRUPTIONS();
			if ((long)h >= (long)ht->nNextFreeElement) {
				ht->nNextFreeElement =
				    h < LONG_MAX ? h + 1 : LONG_MAX;
			}
			// 如果需要返回更新值，则将返回值赋值给pDest
			if (pDest) {
				*pDest = p->pData;
			}
			return SUCCESS;
		}
		// 移动到链表的下一个元素
		p = p->pNext;
	}
	// 如果是新增，为新增元素分配一个Bucket空间
	p = (Bucket *)pemalloc_rel(sizeof(Bucket), ht->persistent);
	if (!p) {
		return FAILURE;
	}
	// 赋值
	p->arKey = NULL;
	p->nKeyLength =
	    0; /* Numeric indices are marked by making the nKeyLength == 0 */
	p->h = h;
	INIT_DATA(ht, p, pData, nDataSize);
	// 如果需要返回更新值，则将返回值赋值给pDest
	if (pDest) {
		*pDest = p->pData;
	}

	CONNECT_TO_BUCKET_DLLIST(
	    p, ht->arBuckets[nIndex]); // 将Bucket加入到对应的桶双向链表中

	HANDLE_BLOCK_INTERRUPTIONS();
	ht->arBuckets[nIndex] = p;
	CONNECT_TO_GLOBAL_DLLIST(
	    p, ht); // 将新的Bucket元素添加到哈希表的双向链表中
	HANDLE_UNBLOCK_INTERRUPTIONS();

	if ((long)h >= (long)ht->nNextFreeElement) {
		ht->nNextFreeElement = h < LONG_MAX ? h + 1 : LONG_MAX;
	}
	ht->nNumOfElements++;
	ZEND_HASH_IF_FULL_DO_RESIZE(
	    ht); /* 如果此时数组的容量满了，则重新分配空间。*/
	return SUCCESS;
}

Example #7

File: zend_hash.c Project: biezaideng/read-php-src

/* 插入新值到哈希表中 */
ZEND_API int _zend_hash_add_or_update(HashTable *ht, const char *arKey,
				      uint nKeyLength, void *pData,
				      uint nDataSize, void **pDest,
				      int flag ZEND_FILE_LINE_DC)
{
	ulong h;
	uint nIndex;
	Bucket *p;
#ifdef ZEND_SIGNALS
	TSRMLS_FETCH();
#endif

	IS_CONSISTENT(ht);

	/* 键值不能为空字符串 */
	if (nKeyLength <= 0) {
#if ZEND_DEBUG
		ZEND_PUTS("zend_hash_update: Can't put in empty key\n");
#endif
		return FAILURE;
	}

	/* 检查哈希表是否以及初始化，如果没有初始化则进行初始化 */
	CHECK_INIT(ht);

	/* 计算key代表的哈希值以及获取其在arBuckets数组中的下标 */
	h = zend_inline_hash_func(arKey, nKeyLength);
	nIndex = h & ht->nTableMask;

	p = ht->arBuckets[nIndex];
	while (p != NULL) {
		if (p->arKey == arKey ||
		    ((p->h == h) && (p->nKeyLength == nKeyLength) &&
		     !memcmp(p->arKey, arKey, nKeyLength))) { /* 需要更新 */
			if (flag &
			    HASH_ADD) { /* 如果是插入的话就返回，不能插入具有相同键值的元素
					   */
				return FAILURE;
			}
			HANDLE_BLOCK_INTERRUPTIONS();
#if ZEND_DEBUG
			if (p->pData == pData) {
				ZEND_PUTS("Fatal error in zend_hash_update: "
					  "p->pData == pData\n");
				HANDLE_UNBLOCK_INTERRUPTIONS();
				return FAILURE;
			}
#endif
			if (ht->pDestructor) { /* 如果有析构函数，则将指向数据的指针释放掉
						  */
				ht->pDestructor(p->pData);
			}

			/* 更新数据 */
			UPDATE_DATA(ht, p, pData, nDataSize);
			if (pDest) {
				*pDest = p->pData;
			}
			HANDLE_UNBLOCK_INTERRUPTIONS();
			return SUCCESS;
		}
		/* 移动到具有相同hash值的bucket链表中的下一个bucket */
		p = p->pNext;
	}

	if (IS_INTERNED(arKey)) {
		p = (Bucket *)pemalloc(sizeof(Bucket), ht->persistent);
		if (!p) {
			return FAILURE;
		}
		p->arKey = arKey;
	} else {
		p = (Bucket *)pemalloc(sizeof(Bucket) + nKeyLength,
				       ht->persistent);
		if (!p) {
			return FAILURE;
		}
		p->arKey = (const char *)(p + 1);
		memcpy((char *)p->arKey, arKey, nKeyLength);
	}

	/* 设置新的bucket的属性值及添加到哈希表中 */
	p->nKeyLength = nKeyLength;
	INIT_DATA(ht, p, pData, nDataSize);
	p->h = h;
	CONNECT_TO_BUCKET_DLLIST(p, ht->arBuckets[nIndex]);
	if (pDest) {
		*pDest = p->pData;
	}

	HANDLE_BLOCK_INTERRUPTIONS();
	CONNECT_TO_GLOBAL_DLLIST(p, ht);
	ht->arBuckets[nIndex] = p;
	HANDLE_UNBLOCK_INTERRUPTIONS();

	ht->nNumOfElements++;
	ZEND_HASH_IF_FULL_DO_RESIZE(
	    ht); /* If the Hash table is full, resize it */
	return SUCCESS;
}

Example #8

File: zend_hash.c Project: moriyoshi/mod_himote

ZEND_API int _zend_hash_add_or_update(HashTable *ht, const char *arKey, uint nKeyLength, void *pData, uint nDataSize, void **pDest, int flag ZEND_FILE_LINE_DC)
{
	ulong h;
	uint nIndex;
	Bucket *p;

	IS_CONSISTENT(ht);

	if (nKeyLength <= 0) {
#if ZEND_DEBUG
		ZEND_PUTS("zend_hash_update: Can't put in empty key\n");
#endif
		return FAILURE;
	}

	h = zend_inline_hash_func(arKey, nKeyLength);
	nIndex = h & ht->nTableMask;

	p = ht->arBuckets[nIndex];
	while (p != NULL) {
		if ((p->h == h) && (p->nKeyLength == nKeyLength)) {
			if (!memcmp(p->arKey, arKey, nKeyLength)) {
				if (flag & HASH_ADD) {
					return FAILURE;
				}
				HANDLE_BLOCK_INTERRUPTIONS();
#if ZEND_DEBUG
				if (p->pData == pData) {
					ZEND_PUTS("Fatal error in zend_hash_update: p->pData == pData\n");
					HANDLE_UNBLOCK_INTERRUPTIONS();
					return FAILURE;
				}
#endif
				if (ht->pDestructor) {
					ht->pDestructor(p->pData);
				}
				UPDATE_DATA(ht, p, pData, nDataSize);
				if (pDest) {
					*pDest = p->pData;
				}
				HANDLE_UNBLOCK_INTERRUPTIONS();
				return SUCCESS;
			}
		}
		p = p->pNext;
	}
	
	p = (Bucket *) pemalloc(sizeof(Bucket) - 1 + nKeyLength, ht->persistent);
	if (!p) {
		return FAILURE;
	}
	memcpy(p->arKey, arKey, nKeyLength);
	p->nKeyLength = nKeyLength;
	INIT_DATA(ht, p, pData, nDataSize);
	p->h = h;
	CONNECT_TO_BUCKET_DLLIST(p, ht->arBuckets[nIndex]);
	if (pDest) {
		*pDest = p->pData;
	}

	HANDLE_BLOCK_INTERRUPTIONS();
	CONNECT_TO_GLOBAL_DLLIST(p, ht);
	ht->arBuckets[nIndex] = p;
	HANDLE_UNBLOCK_INTERRUPTIONS();

	ht->nNumOfElements++;
	ZEND_HASH_IF_FULL_DO_RESIZE(ht);		/* If the Hash table is full, resize it */
	return SUCCESS;
}