mirror of
https://github.com/php/php-src.git
synced 2024-12-18 14:30:35 +08:00
85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| Zend Engine |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) 1998-2008 Zend Technologies Ltd. (http://www.zend.com) |
|
|
+----------------------------------------------------------------------+
|
|
| This source file is subject to version 2.00 of the Zend license, |
|
|
| that is bundled with this package in the file LICENSE, and is |
|
|
| available through the world-wide-web at the following url: |
|
|
| http://www.zend.com/license/2_00.txt. |
|
|
| If you did not receive a copy of the Zend license and are unable to |
|
|
| obtain it through the world-wide-web, please send a note to |
|
|
| license@zend.com so we can mail you a copy immediately. |
|
|
+----------------------------------------------------------------------+
|
|
| Authors: Andi Gutmans <andi@zend.com> |
|
|
+----------------------------------------------------------------------+
|
|
*/
|
|
|
|
/* $Id$ */
|
|
|
|
#include "zend_static_allocator.h"
|
|
|
|
/* Not checking emalloc() and erealloc() return values as they are supposed to bailout */
|
|
|
|
inline static void block_init(Block *block, zend_uint block_size)
|
|
{
|
|
block->pos = block->bp = (char *) emalloc(block_size);
|
|
block->end = block->bp + block_size;
|
|
}
|
|
|
|
inline static char *block_allocate(Block *block, zend_uint size)
|
|
{
|
|
char *retval = block->pos;
|
|
if ((block->pos += size) >= block->end) {
|
|
return (char *)NULL;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
inline static void block_destroy(Block *block)
|
|
{
|
|
efree(block->bp);
|
|
}
|
|
|
|
void static_allocator_init(StaticAllocator *sa)
|
|
{
|
|
sa->Blocks = (Block *) emalloc(sizeof(Block));
|
|
block_init(sa->Blocks, ALLOCATOR_BLOCK_SIZE);
|
|
sa->num_blocks = 1;
|
|
sa->current_block = 0;
|
|
}
|
|
|
|
char *static_allocator_allocate(StaticAllocator *sa, zend_uint size)
|
|
{
|
|
char *retval;
|
|
|
|
retval = block_allocate(&sa->Blocks[sa->current_block], size);
|
|
if (retval) {
|
|
return retval;
|
|
}
|
|
sa->Blocks = (Block *) erealloc(sa->Blocks, ++sa->num_blocks);
|
|
sa->current_block++;
|
|
block_init(&sa->Blocks[sa->current_block], (size > ALLOCATOR_BLOCK_SIZE) ? size : ALLOCATOR_BLOCK_SIZE);
|
|
retval = block_allocate(&sa->Blocks[sa->current_block], size);
|
|
return retval;
|
|
}
|
|
|
|
void static_allocator_destroy(StaticAllocator *sa)
|
|
{
|
|
zend_uint i;
|
|
|
|
for (i=0; i<sa->num_blocks; i++) {
|
|
block_free(&sa->Blocks[i]);
|
|
}
|
|
efree(sa->Blocks);
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*/
|