code.delx.au - pulseaudio/blob - src/memblock.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   polypaudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with polypaudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <assert.h>
  29 #include <string.h>
  30
  31 #include "memblock.h"
  32
  33 static unsigned memblock_count = 0, memblock_total = 0;
  34
  35 struct pa_memblock *pa_memblock_new(size_t length) {
  36     struct pa_memblock *b = malloc(sizeof(struct pa_memblock)+length);
  37     b->type = PA_MEMBLOCK_APPENDED;
  38     b->ref = 1;
  39     b->length = length;
  40     b->data = b+1;
  41     memblock_count++;
  42     memblock_total += length;
  43     return b;
  44 }
  45
  46 struct pa_memblock *pa_memblock_new_fixed(void *d, size_t length) {
  47     struct pa_memblock *b = malloc(sizeof(struct pa_memblock));
  48     b->type = PA_MEMBLOCK_FIXED;
  49     b->ref = 1;
  50     b->length = length;
  51     b->data = d;
  52     memblock_count++;
  53     memblock_total += length;
  54     return b;
  55 }
  56
  57 struct pa_memblock *pa_memblock_new_dynamic(void *d, size_t length) {
  58     struct pa_memblock *b = malloc(sizeof(struct pa_memblock));
  59     b->type = PA_MEMBLOCK_DYNAMIC;
  60     b->ref = 1;
  61     b->length = length;
  62     b->data = d;
  63     memblock_count++;
  64     memblock_total += length;
  65     return b;
  66 }
  67
  68 struct pa_memblock* pa_memblock_ref(struct pa_memblock*b) {
  69     assert(b && b->ref >= 1);
  70     b->ref++;
  71     return b;
  72 }
  73
  74 void pa_memblock_unref(struct pa_memblock*b) {
  75     assert(b && b->ref >= 1);
  76     b->ref--;
  77
  78     if (b->ref == 0) {
  79         if (b->type == PA_MEMBLOCK_DYNAMIC)
  80             free(b->data);
  81
  82         memblock_count--;
  83         memblock_total -= b->length;
  84
  85         free(b);
  86     }
  87 }
  88
  89 void pa_memblock_unref_fixed(struct pa_memblock *b) {
  90     void *d;
  91
  92     assert(b && b->ref >= 1);
  93
  94     if (b->ref == 1) {
  95         pa_memblock_unref(b);
  96         return;
  97     } else {
  98         d = malloc(b->length);
  99         assert(d);
 100         memcpy(d, b->data, b->length);
 101         b->data = d;
 102         b->type = PA_MEMBLOCK_DYNAMIC;
 103         b->ref--;
 104     }
 105 }
 106
 107 unsigned pa_memblock_get_count(void) {
 108     return memblock_count;
 109 }
 110
 111 unsigned pa_memblock_get_total(void) {
 112     return memblock_total;
 113 }