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76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2002 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 at through the world-wide-web at |
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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: Andi Gutmans <andi@zend.com> |
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+----------------------------------------------------------------------+
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*/
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#include "zend_static_allocator.h"
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/* Not checking emalloc() and erealloc() return values as they are supposed to bailout */
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inline static void block_init(Block *block, zend_uint block_size)
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{
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block->pos = block->bp = (char *) emalloc(block_size);
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block->end = block->bp + block_size;
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}
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inline static char *block_allocate(Block *block, zend_uint size)
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{
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char *retval = block->pos;
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if ((block->pos += size) >= block->end) {
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return (char *)NULL;
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}
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return retval;
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}
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inline static void block_destroy(Block *block)
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{
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efree(block->bp);
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}
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void static_allocator_init(StaticAllocator *sa)
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{
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sa->Blocks = (Block *) emalloc(sizeof(Block));
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block_init(sa->Blocks, ALLOCATOR_BLOCK_SIZE);
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sa->num_blocks = 1;
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sa->current_block = 0;
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}
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char *static_allocator_allocate(StaticAllocator *sa, zend_uint size)
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{
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char *retval;
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retval = block_allocate(&sa->Blocks[sa->current_block], size);
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if (retval) {
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return retval;
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}
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sa->Blocks = (Block *) erealloc(sa->Blocks, ++sa->num_blocks);
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sa->current_block++;
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block_init(&sa->Blocks[sa->current_block], (size > ALLOCATOR_BLOCK_SIZE) ? size : ALLOCATOR_BLOCK_SIZE);
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retval = block_allocate(&sa->Blocks[sa->current_block], size);
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return retval;
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}
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void static_allocator_destroy(StaticAllocator *sa)
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{
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zend_uint i;
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for (i=0; i<sa->num_blocks; i++) {
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block_free(&sa->Blocks[i]);
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}
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efree(sa->Blocks);
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}
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