memb.h

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/*
 * 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 2009/04/06 21:18:04 adamdunkels Exp $
 */
 
#ifndef __MEMB_H__
#define __MEMB_H__
 
#include "sys/cc.h"
 
#define MEMB(name, structure, num) \
        static char CC_CONCAT(name,_memb_count)[num]; \
        static structure CC_CONCAT(name,_memb_mem)[num]; \
        static struct memb name = {sizeof(structure), num, \
                                          CC_CONCAT(name,_memb_count), \
                                          (void *)CC_CONCAT(name,_memb_mem)}
 
struct memb {
  unsigned short size;
  unsigned short num;
  char *count;
  void *mem;
};
 
void  memb_init(struct memb *m);
 
void *memb_alloc(struct memb *m);
 
char  memb_free(struct memb *m, void *ptr);
 
int memb_inmemb(struct memb *m, void *ptr);
 
int memb_free_count(struct memb *m);
 
#endif /* __MEMB_H__ */