1.3.5
00001 00006 /* 00007 * The contents of this file are subject to the Mozilla Public License 00008 * Version 1.0 (the "License"); you may not use this file except in 00009 * compliance with the License. You may obtain a copy of the License 00010 * at http://www.mozilla.org/MPL/ 00011 * 00012 * Software distributed under the License is distributed on an "AS IS" 00013 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See 00014 * the License for the specific language governing rights and 00015 * limitations under the License. 00016 * 00017 * The Original Code is legOS code, released October 17, 1999. 00018 * 00019 * The Initial Developer of the Original Code is Markus L. Noga. 00020 * Portions created by Markus L. Noga are Copyright (C) 1999 00021 * Markus L. Noga. All Rights Reserved. 00022 * 00023 * Contributor(s): Markus L. Noga <markus@noga.de> 00024 */ 00025 00026 #ifndef __sys_mm_h__ 00027 #define __sys_mm_h__ 00028 00029 #ifdef __cplusplus 00030 extern "C" { 00031 #endif 00032 00033 #include <config.h> 00034 00035 #ifdef CONF_MM 00036 00037 #include <mem.h> 00038 #include <stdlib.h> 00039 00040 00042 // 00043 // Definitions 00044 // 00046 00047 #define MM_FREE 0x0000 00048 #define MM_RESERVED 0xffff 00049 00050 // as data generally nees to be word aligned, 1 unit ^= 2 bytes 00051 // 00052 00053 #define MM_HEADER_SIZE 2 00054 #define MM_SPLIT_THRESH (MM_HEADER_SIZE+8) 00055 00056 extern size_t mm_start; 00057 00058 extern size_t* mm_first_free; 00059 00060 // Macros for mm_init() 00061 // Always alternate FREE and RESERVED. 00062 // 00063 00065 00068 #define MM_BLOCK_FREE(addr) \ 00069 next=(size_t*)(addr); \ 00070 *current=((((size_t)next)-(size_t)current)-2)>>1; \ 00071 *(next++)=MM_FREE; \ 00072 current=next; 00073 00074 00076 00079 #define MM_BLOCK_RESERVED(addr) \ 00080 next=(size_t*)(((size_t)addr)-4); \ 00081 *current=((((size_t)next)-(size_t)current)-2)>>1; \ 00082 *(next++)=MM_RESERVED; \ 00083 current=next; 00084 00085 00087 // 00088 // Functions 00089 // 00091 00093 extern void mm_init(); 00094 00096 extern void mm_reaper(); 00097 00099 extern int mm_free_mem(void); 00100 00101 #endif // CONF_MM 00102 00103 #ifdef __cplusplus 00104 } 00105 #endif 00106 00107 #endif // __sys_mm_h__
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brickOS is released under the
Mozilla Public License.
Original code copyright 1998-2002 by the authors. |
1.3.5