Return to zend_static_allocator.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / php / Zend

Annotation of embedaddon/php/Zend/zend_static_allocator.c, revision 1.1

1.1     ! misho       1: /*
        !             2:    +----------------------------------------------------------------------+
        !             3:    | Zend Engine                                                          |
        !             4:    +----------------------------------------------------------------------+
        !             5:    | Copyright (c) 1998-2012 Zend Technologies Ltd. (http://www.zend.com) |
        !             6:    +----------------------------------------------------------------------+
        !             7:    | This source file is subject to version 2.00 of the Zend license,     |
        !             8:    | that is bundled with this package in the file LICENSE, and is        |
        !             9:    | available through the world-wide-web at the following url:           |
        !            10:    | http://www.zend.com/license/2_00.txt.                                |
        !            11:    | If you did not receive a copy of the Zend license and are unable to  |
        !            12:    | obtain it through the world-wide-web, please send a note to          |
        !            13:    | license@zend.com so we can mail you a copy immediately.              |
        !            14:    +----------------------------------------------------------------------+
        !            15:    | Authors: Andi Gutmans <andi@zend.com>                                |
        !            16:    +----------------------------------------------------------------------+
        !            17: */
        !            18: 
        !            19: /* $Id: zend_static_allocator.c 321634 2012-01-01 13:15:04Z felipe $ */
        !            20: 
        !            21: #include "zend_static_allocator.h"
        !            22: 
        !            23: /* Not checking emalloc() and erealloc() return values as they are supposed to bailout */
        !            24: 
        !            25: inline static void block_init(Block *block, zend_uint block_size)
        !            26: {
        !            27:        block->pos = block->bp = (char *) emalloc(block_size);
        !            28:        block->end = block->bp + block_size;
        !            29: }
        !            30: 
        !            31: inline static char *block_allocate(Block *block, zend_uint size)
        !            32: {
        !            33:        char *retval = block->pos;
        !            34:        if ((block->pos += size) >= block->end) {
        !            35:                return (char *)NULL;
        !            36:        }
        !            37:        return retval;
        !            38: }
        !            39: 
        !            40: inline static void block_destroy(Block *block)
        !            41: {
        !            42:        efree(block->bp);
        !            43: }
        !            44: 
        !            45: void static_allocator_init(StaticAllocator *sa)
        !            46: {
        !            47:        sa->Blocks = (Block *) emalloc(sizeof(Block));
        !            48:        block_init(sa->Blocks, ALLOCATOR_BLOCK_SIZE);
        !            49:        sa->num_blocks = 1;
        !            50:        sa->current_block = 0;
        !            51: }
        !            52: 
        !            53: char *static_allocator_allocate(StaticAllocator *sa, zend_uint size)
        !            54: {
        !            55:        char *retval;
        !            56: 
        !            57:        retval = block_allocate(&sa->Blocks[sa->current_block], size);
        !            58:        if (retval) {
        !            59:                return retval;
        !            60:        }
        !            61:        sa->Blocks = (Block *) erealloc(sa->Blocks, ++sa->num_blocks);
        !            62:        sa->current_block++;
        !            63:        block_init(&sa->Blocks[sa->current_block], (size > ALLOCATOR_BLOCK_SIZE) ? size : ALLOCATOR_BLOCK_SIZE);
        !            64:        retval = block_allocate(&sa->Blocks[sa->current_block], size);
        !            65:        return retval;
        !            66: }
        !            67: 
        !            68: void static_allocator_destroy(StaticAllocator *sa)
        !            69: {
        !            70:        zend_uint i;
        !            71: 
        !            72:        for (i=0; i<sa->num_blocks; i++) {
        !            73:                block_free(&sa->Blocks[i]);
        !            74:        }
        !            75:        efree(sa->Blocks);
        !            76: }
        !            77: 
        !            78: /*
        !            79:  * Local variables:
        !            80:  * tab-width: 4
        !            81:  * c-basic-offset: 4
        !            82:  * indent-tabs-mode: t
        !            83:  * End:
        !            84:  */