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   1 /*
   2  * Copyright (c) 2007, Kohsuke Ohtani
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  30 #include <sys/prex.h>
  31 #include <sys/param.h>
  33 /* #define DEBUG_MALLOC 1 */
  35 #define MALLOC_MAGIC    (int)0xBAADF00D /* "bad food" from LocalAlloc :) */
  37 #ifdef _REENTRANT
  38 #define MALLOC_LOCK()   mutex_lock(&malloc_lock);
  39 #define MALLOC_UNLOCK() mutex_unlock(&malloc_lock);
  40 #else
  41 #define MALLOC_LOCK()   do {} while (0)
  42 #define MALLOC_UNLOCK() do {} while (0)
  43 #endif
  45 #define ALIGN_SIZE      16
  46 #define ALIGN_MASK      (ALIGN_SIZE - 1)
  47 #define ROUNDUP(size)   (((u_long)(size) + ALIGN_MASK) & ~ALIGN_MASK)
  49 struct header {
  50         struct header *next;
size_t size;
size_t vm_size;
  53 #ifdef DEBUG_MALLOC
  54         int magic;
  55 #endif
  56 };