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c59219de85
Adding an offset to the NULL pointer is undefined behavior. Avoid this by performing arithmetic on uintptr_t instead.
96 lines
3.4 KiB
C
96 lines
3.4 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
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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: Dmitry Stogov <dmitry@php.net> |
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+----------------------------------------------------------------------+
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*/
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#ifndef ZEND_MAP_PTR_H
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#define ZEND_MAP_PTR_H
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#include "zend_portability.h"
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#define ZEND_MAP_PTR_KIND_PTR 0
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#define ZEND_MAP_PTR_KIND_PTR_OR_OFFSET 1
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//#if defined(ZTS) || defined(TSRM_WIN32)
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# define ZEND_MAP_PTR_KIND ZEND_MAP_PTR_KIND_PTR_OR_OFFSET
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//#else
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//# define ZEND_MAP_PTR_KIND ZEND_MAP_PTR_KIND_PTR
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//#endif
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#if ZEND_MAP_PTR_KIND == ZEND_MAP_PTR_KIND_PTR
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# define ZEND_MAP_PTR(ptr) \
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ptr ## __ptr
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# define ZEND_MAP_PTR_DEF(type, name) \
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type * ZEND_MAP_PTR(name)
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# define ZEND_MAP_PTR_GET(ptr) \
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(*(ZEND_MAP_PTR(ptr)))
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# define ZEND_MAP_PTR_SET(ptr, val) do { \
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(*(ZEND_MAP_PTR(ptr))) = (val); \
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} while (0)
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# define ZEND_MAP_PTR_INIT(ptr, val) do { \
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ZEND_MAP_PTR(ptr) = (val); \
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} while (0)
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# define ZEND_MAP_PTR_NEW(ptr) do { \
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ZEND_MAP_PTR(ptr) = zend_map_ptr_new(); \
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} while (0)
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# define ZEND_MAP_PTR_REAL_BASE(base) \
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(base)
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# define ZEND_MAP_PTR_SET_REAL_BASE(base, ptr) do { \
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base = (ptr); \
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} while (0)
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#elif ZEND_MAP_PTR_KIND == ZEND_MAP_PTR_KIND_PTR_OR_OFFSET
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# define ZEND_MAP_PTR(ptr) \
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ptr ## __ptr
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# define ZEND_MAP_PTR_DEF(type, name) \
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type * ZEND_MAP_PTR(name)
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# define ZEND_MAP_PTR_IS_OFFSET(ptr) \
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(((uintptr_t)ZEND_MAP_PTR(ptr)) & 1L)
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# define ZEND_MAP_PTR_OFFSET2PTR(ptr) \
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((void**)((char*)CG(map_ptr_base) + (uintptr_t)ZEND_MAP_PTR(ptr)))
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# define ZEND_MAP_PTR_PTR2OFFSET(ptr) \
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((void*)(((char*)(ptr)) - ((char*)CG(map_ptr_base))))
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# define ZEND_MAP_PTR_GET(ptr) \
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(*(ZEND_MAP_PTR_IS_OFFSET(ptr) ? \
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ZEND_MAP_PTR_OFFSET2PTR(ptr) : \
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((void**)(ZEND_MAP_PTR(ptr)))))
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# define ZEND_MAP_PTR_SET(ptr, val) do { \
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void **__p = (void**)(ZEND_MAP_PTR(ptr)); \
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if (ZEND_MAP_PTR_IS_OFFSET(ptr)) { \
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__p = ZEND_MAP_PTR_OFFSET2PTR(ptr); \
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} \
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*__p = (val); \
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} while (0)
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# define ZEND_MAP_PTR_INIT(ptr, val) do { \
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ZEND_MAP_PTR(ptr) = (val); \
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} while (0)
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# define ZEND_MAP_PTR_NEW(ptr) do { \
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ZEND_MAP_PTR(ptr) = zend_map_ptr_new(); \
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} while (0)
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# define ZEND_MAP_PTR_REAL_BASE(base) \
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((void*)(((uintptr_t)(base)) + 1))
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# define ZEND_MAP_PTR_SET_REAL_BASE(base, ptr) do { \
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base = (void*)(((uintptr_t)(ptr)) - 1); \
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} while (0)
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#else
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# error "Unknown ZEND_MAP_PTR_KIND"
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#endif
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ZEND_API void zend_map_ptr_reset(void);
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ZEND_API void *zend_map_ptr_new(void);
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ZEND_API void zend_map_ptr_extend(size_t last);
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#endif /* ZEND_MAP_PTR_H */
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