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be49d61b19
When the PHP source code was versioned in Subversion, there was possible to substitute certain keywords such as $Id$ with revision number, last change time and author name. Such approach is not used in Git so this patch removes these outdated artifacts from source code files.
124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2018 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@zend.com> |
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+----------------------------------------------------------------------+
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*/
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#ifndef _ZEND_ARENA_H_
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#define _ZEND_ARENA_H_
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#include "zend.h"
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typedef struct _zend_arena zend_arena;
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struct _zend_arena {
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char *ptr;
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char *end;
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zend_arena *prev;
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};
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static zend_always_inline zend_arena* zend_arena_create(size_t size)
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{
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zend_arena *arena = (zend_arena*)emalloc(size);
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arena->ptr = (char*) arena + ZEND_MM_ALIGNED_SIZE(sizeof(zend_arena));
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arena->end = (char*) arena + size;
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arena->prev = NULL;
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return arena;
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}
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static zend_always_inline void zend_arena_destroy(zend_arena *arena)
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{
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do {
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zend_arena *prev = arena->prev;
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efree(arena);
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arena = prev;
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} while (arena);
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}
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#define ZEND_ARENA_ALIGNMENT 8U
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static zend_always_inline void* zend_arena_alloc(zend_arena **arena_ptr, size_t size)
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{
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zend_arena *arena = *arena_ptr;
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char *ptr = arena->ptr;
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size = ZEND_MM_ALIGNED_SIZE(size);
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if (EXPECTED(size <= (size_t)(arena->end - ptr))) {
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arena->ptr = ptr + size;
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} else {
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size_t arena_size =
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UNEXPECTED((size + ZEND_MM_ALIGNED_SIZE(sizeof(zend_arena))) > (size_t)(arena->end - (char*) arena)) ?
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(size + ZEND_MM_ALIGNED_SIZE(sizeof(zend_arena))) :
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(size_t)(arena->end - (char*) arena);
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zend_arena *new_arena = (zend_arena*)emalloc(arena_size);
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ptr = (char*) new_arena + ZEND_MM_ALIGNED_SIZE(sizeof(zend_arena));
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new_arena->ptr = (char*) new_arena + ZEND_MM_ALIGNED_SIZE(sizeof(zend_arena)) + size;
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new_arena->end = (char*) new_arena + arena_size;
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new_arena->prev = arena;
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*arena_ptr = new_arena;
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}
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return (void*) ptr;
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}
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static zend_always_inline void* zend_arena_calloc(zend_arena **arena_ptr, size_t count, size_t unit_size)
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{
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int overflow;
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size_t size;
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void *ret;
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size = zend_safe_address(unit_size, count, 0, &overflow);
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if (UNEXPECTED(overflow)) {
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zend_error(E_ERROR, "Possible integer overflow in zend_arena_calloc() (%zu * %zu)", unit_size, count);
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}
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ret = zend_arena_alloc(arena_ptr, size);
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memset(ret, 0, size);
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return ret;
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}
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static zend_always_inline void* zend_arena_checkpoint(zend_arena *arena)
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{
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return arena->ptr;
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}
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static zend_always_inline void zend_arena_release(zend_arena **arena_ptr, void *checkpoint)
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{
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zend_arena *arena = *arena_ptr;
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while (UNEXPECTED((char*)checkpoint > arena->end) ||
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UNEXPECTED((char*)checkpoint <= (char*)arena)) {
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zend_arena *prev = arena->prev;
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efree(arena);
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*arena_ptr = arena = prev;
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}
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ZEND_ASSERT((char*)checkpoint > (char*)arena && (char*)checkpoint <= arena->end);
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arena->ptr = (char*)checkpoint;
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}
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#endif /* _ZEND_ARENA_H_ */
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* indent-tabs-mode: t
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* End:
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* vim600: sw=4 ts=4 fdm=marker
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* vim<600: sw=4 ts=4
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*/
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