00001 #ifndef _SYS_HEAP_H_ 00002 #define _SYS_HEAP_H_ 00003 00004 /* 00005 * Copyright (C) 2001-2003 by egnite Software GmbH. All rights reserved. 00006 * 00007 * Redistribution and use in source and binary forms, with or without 00008 * modification, are permitted provided that the following conditions 00009 * are met: 00010 * 00011 * 1. Redistributions of source code must retain the above copyright 00012 * notice, this list of conditions and the following disclaimer. 00013 * 2. Redistributions in binary form must reproduce the above copyright 00014 * notice, this list of conditions and the following disclaimer in the 00015 * documentation and/or other materials provided with the distribution. 00016 * 3. Neither the name of the copyright holders nor the names of 00017 * contributors may be used to endorse or promote products derived 00018 * from this software without specific prior written permission. 00019 * 00020 * THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS 00021 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00022 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 00023 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EGNITE 00024 * SOFTWARE GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 00025 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 00026 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 00027 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 00028 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00029 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 00030 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00031 * SUCH DAMAGE. 00032 * 00033 * For additional information see http://www.ethernut.de/ 00034 * 00035 * - 00036 * Portions Copyright (C) 2000 David J. Hudson <dave@humbug.demon.co.uk> 00037 * 00038 * This file is distributed in the hope that it will be useful, but WITHOUT 00039 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 00040 * FITNESS FOR A PARTICULAR PURPOSE. 00041 * 00042 * You can redistribute this file and/or modify it under the terms of the GNU 00043 * General Public License (GPL) as published by the Free Software Foundation; 00044 * either version 2 of the License, or (at your discretion) any later version. 00045 * See the accompanying file "copying-gpl.txt" for more details. 00046 * 00047 * As a special exception to the GPL, permission is granted for additional 00048 * uses of the text contained in this file. See the accompanying file 00049 * "copying-liquorice.txt" for details. 00050 */ 00051 00052 /* 00053 * $Log: heap.h,v $ 00054 * Revision 1.9 2008/06/25 08:50:33 freckle 00055 * added new function NutHeapRealloc 00056 * 00057 * Revision 1.8 2008/06/15 17:15:49 haraldkipp 00058 * Rolled back to version 1.4. 00059 * 00060 * Revision 1.4 2006/10/06 23:19:08 hwmaier 00061 * Added include statement for cfg/memory.h so the macro NUTMEM_STACKHEAP is found when compiling for the AT90CAN128. 00062 * 00063 * Revision 1.3 2006/09/29 12:26:14 haraldkipp 00064 * All code should use dedicated stack allocation routines. For targets 00065 * allocating stack from the normal heap the API calls are remapped by 00066 * preprocessor macros. 00067 * Stack allocation code moved from thread module to heap module. 00068 * Adding static attribute to variable 'available' will avoid interference 00069 * with application code. The ugly format macros had been replaced by 00070 * converting all platform specific sizes to unsigned integers. 00071 * 00072 * Revision 1.2 2004/03/16 16:48:44 haraldkipp 00073 * Added Jan Dubiec's H8/300 port. 00074 * 00075 * Revision 1.1.1.1 2003/05/09 14:41:20 haraldkipp 00076 * Initial using 3.2.1 00077 * 00078 * Revision 1.7 2003/02/04 18:00:52 harald 00079 * Version 3 released 00080 * 00081 * Revision 1.6 2002/06/26 17:29:28 harald 00082 * First pre-release with 2.4 stack 00083 * 00084 */ 00085 00086 #include <cfg/memory.h> 00087 #include <sys/types.h> 00088 00094 #ifdef __cplusplus 00095 extern "C" { 00096 #endif 00097 00106 typedef struct _HEAPNODE { 00107 size_t hn_size; 00108 struct _HEAPNODE *hn_next; 00109 } HEAPNODE; 00110 00111 extern HEAPNODE* volatile heapFreeList; 00112 00119 #define ALLOC_THRESHOLD 6 00120 #define REALLOC_THRESHOLD ALLOC_THRESHOLD 00121 00122 extern void *NutHeapAlloc(size_t size); 00123 extern void *NutHeapAllocClear(size_t size); 00124 extern int NutHeapFree(void *block); 00125 extern void * NutHeapRealloc( void * block, u_short size); 00126 extern void NutHeapAdd(void *addr, size_t size); 00127 extern size_t NutHeapAvailable(void); 00128 00129 #if defined (NUTMEM_STACKHEAP) 00130 00131 /* Dedicated stack memory. */ 00132 extern void *NutStackAlloc(size_t size); 00133 extern int NutStackFree(void *block); 00134 extern void NutStackAdd(void *addr, size_t size); 00135 00136 #else /* !NUTMEM_STACKHEAP */ 00137 00138 /* Thread stacks resides in normal heap. */ 00139 #define NutStackAlloc(size) NutHeapAlloc(size) 00140 #define NutStackFree(block) NutHeapFree(block) 00141 00142 #endif /* !NUTMEM_STACKHEAP */ 00143 00144 #ifdef __cplusplus 00145 } 00146 #endif 00147 00148 #endif