| /* |
| * Copyright (c) 2004, Swedish Institute of Computer Science. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the Institute nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * This file is part of the Contiki operating system. |
| * |
| * Author: Adam Dunkels <adam@sics.se> |
| * |
| * $Id: memb.h,v 1.6 2004/09/12 20:24:55 adamdunkels Exp $ |
| */ |
| /** |
| * \addtogroup memb |
| * @{ |
| */ |
| |
| /** |
| * \file |
| * Memory block allocation routines. |
| * \author Adam Dunkels <adam@sics.se> |
| * |
| */ |
| |
| #ifndef __MEMB_H__ |
| #define __MEMB_H__ |
| |
| /** |
| * Declare a memory block. |
| * |
| * This macro is used to staticall declare a block of memory that can |
| * be used by the block allocation functions. The macro statically |
| * declares a C array with a size that matches the specified number of |
| * blocks and their individual sizes. |
| * |
| * Example: |
| \code |
| MEMB(connections, sizeof(struct connection), 16); |
| \endcode |
| * |
| * \param name The name of the memory block (later used with |
| * memb_init(), memb_alloc() and memb_free()). |
| * |
| * \param size The size of each memory chunk, in bytes. |
| * |
| * \param num The total number of memory chunks in the block. |
| * |
| */ |
| #if CC_DOUBLE_HASH |
| #define MEMB(name, size, num) \ |
| static char name##_memb_mem[(size + 1) * num]; \ |
| static struct memb_blocks name = {size, num, name##_memb_mem} |
| #else /* CC_DOUBLE_HASH */ |
| #define MEMB(name, size, num) \ |
| static char name_memb_mem[(size + 1) * num]; \ |
| static struct memb_blocks name = {size, num, name_memb_mem} |
| #endif /* CC_DOUBLE_HASH */ |
| |
| struct memb_blocks { |
| unsigned short size; |
| unsigned short num; |
| char *mem; |
| }; |
| |
| void memb_init(struct memb_blocks *m); |
| char *memb_alloc(struct memb_blocks *m); |
| char memb_ref(struct memb_blocks *m, char *ptr); |
| char memb_free(struct memb_blocks *m, void *ptr); |
| |
| /** @} */ |
| |
| #endif /* __MEMB_H__ */ |