git.squeep.com Git - allocwithin/blob - allocwithin_int.h

   1 #ifndef __ALLOCWITHIN_INT_H__
   2 #define __ALLOCWITHIN_INT_H__
   3
   4 /**
   5  *  $Id$
   6 */
   7
   8 #ifdef HAVE_CONFIG_H
   9 #include "config.h"
  10 #endif
  11
  12 #ifdef HAVE_STDLIB_H
  13 #include <stdlib.h>
  14 #endif
  15 #ifdef HAVE_UNISTD_H
  16 #include <unistd.h>
  17 #endif
  18 #ifdef HAVE_SIGNAL_H
  19 #include <signal.h>
  20 #endif
  21 #ifdef HAVE_LIBPTHREAD
  22 #include <pthread.h>
  23 #endif
  24 #ifdef HAVE_STRING_H
  25 #include <string.h>
  26 #endif
  27 #ifdef STDC_HEADERS
  28 #include <stdio.h>
  29 #include <errno.h>
  30 #endif
  31
  32 #include "allocwithin.h"
  33
  34 #ifdef HAVE___ATTRIBUTE__
  35 #define UNUSED __attribute__((__unused__))
  36 #endif
  37
  38 struct allocw_block_
  39 {
  40     size_t size;       /* total bytes of this block, including this header struct */
  41     allocw_id_t next_off;   /* byte-offset of next block, from start-of-region */
  42     allocw_id_t prev_off;   /* byte-offset of prev block, from start-of-region */
  43     char data_[];               /* user data follows this header struct */
  44 };
  45
  46 struct allocw_region_
  47 {
  48     size_t size;           /* total bytes of this region, including this header struct */
  49     allocw_id_t free_start;     /* first free block */
  50     allocw_id_t free_end;       /* last free block */
  51     pthread_mutex_t freelist_mutex; /* mutex for accessing freelist */
  52     unsigned int num_alloced;   /* number of outstanding allocations */
  53     char data_[];                   /* blocks follow this header struct */
  54 };
  55
  56 /* convert an id into a region to a pointer */
  57 #define BLOCK_PTR(__region, __id) ( (struct allocw_block_ *)((char *)(__region) + (__id)) )
  58
  59 /* convert a pointer to a block in a region to an id */
  60 #define BLOCK_OFF(__region, __block) ( (void *)(__block) - (void *)(__region) )
  61
  62 #endif /* __ALLOCWITHIN_INT_H__ */