code.delx.au - pulseaudio/blob - polyp/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 Lesser General Public License as
   8   published by the Free Software Foundation; either version 2.1 of the
   9   License, 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   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public
  17   License 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 #include "xmalloc.h"
  33
  34 static void stat_add(struct pa_memblock*m, struct pa_memblock_stat *s) {
  35     assert(m);
  36
  37     m->stat = pa_memblock_stat_ref(s);
  38     s->total++;
  39     s->allocated++;
  40     s->total_size += m->length;
  41     s->allocated_size += m->length;
  42 }
  43
  44 static void stat_remove(struct pa_memblock *m) {
  45     assert(m);
  46
  47     if (!m->stat)
  48         return;
  49
  50     m->stat->total--;
  51     m->stat->total_size -= m->length;
  52
  53     pa_memblock_stat_unref(m->stat);
  54     m->stat = NULL;
  55 }
  56
  57 struct pa_memblock *pa_memblock_new(size_t length, struct pa_memblock_stat*s) {
  58     struct pa_memblock *b = pa_xmalloc(sizeof(struct pa_memblock)+length);
  59     b->type = PA_MEMBLOCK_APPENDED;
  60     b->ref = 1;
  61     b->length = length;
  62     b->data = b+1;
  63     b->free_cb = NULL;
  64     stat_add(b, s);
  65     return b;
  66 }
  67
  68 struct pa_memblock *pa_memblock_new_fixed(void *d, size_t length, struct pa_memblock_stat*s) {
  69     struct pa_memblock *b = pa_xmalloc(sizeof(struct pa_memblock));
  70     b->type = PA_MEMBLOCK_FIXED;
  71     b->ref = 1;
  72     b->length = length;
  73     b->data = d;
  74     b->free_cb = NULL;
  75     stat_add(b, s);
  76     return b;
  77 }
  78
  79 struct pa_memblock *pa_memblock_new_dynamic(void *d, size_t length, struct pa_memblock_stat*s) {
  80     struct pa_memblock *b = pa_xmalloc(sizeof(struct pa_memblock));
  81     b->type = PA_MEMBLOCK_DYNAMIC;
  82     b->ref = 1;
  83     b->length = length;
  84     b->data = d;
  85     b->free_cb = NULL;
  86     stat_add(b, s);
  87     return b;
  88 }
  89
  90 struct pa_memblock *pa_memblock_new_user(void *d, size_t length, void (*free_cb)(void *p), struct pa_memblock_stat*s) {
  91     struct pa_memblock *b;
  92     assert(d && length && free_cb);
  93     b = pa_xmalloc(sizeof(struct pa_memblock));
  94     b->type = PA_MEMBLOCK_USER;
  95     b->ref = 1;
  96     b->length = length;
  97     b->data = d;
  98     b->free_cb = free_cb;
  99     stat_add(b, s);
 100     return b;
 101 }
 102
 103 struct pa_memblock* pa_memblock_ref(struct pa_memblock*b) {
 104     assert(b && b->ref >= 1);
 105     b->ref++;
 106     return b;
 107 }
 108
 109 void pa_memblock_unref(struct pa_memblock*b) {
 110     assert(b && b->ref >= 1);
 111
 112     if ((--(b->ref)) == 0) {
 113         stat_remove(b);
 114
 115         if (b->type == PA_MEMBLOCK_USER) {
 116             assert(b->free_cb);
 117             b->free_cb(b->data);
 118         } else if (b->type == PA_MEMBLOCK_DYNAMIC)
 119             pa_xfree(b->data);
 120
 121         pa_xfree(b);
 122     }
 123 }
 124
 125 void pa_memblock_unref_fixed(struct pa_memblock *b) {
 126     assert(b && b->ref >= 1 && b->type == PA_MEMBLOCK_FIXED);
 127
 128     if (b->ref == 1)
 129         pa_memblock_unref(b);
 130     else {
 131         b->data = pa_xmemdup(b->data, b->length);
 132         b->type = PA_MEMBLOCK_DYNAMIC;
 133         b->ref--;
 134     }
 135 }
 136
 137 struct pa_memblock_stat* pa_memblock_stat_new(void) {
 138     struct pa_memblock_stat *s;
 139
 140     s = pa_xmalloc(sizeof(struct pa_memblock_stat));
 141     s->ref = 1;
 142     s->total = s->total_size = s->allocated = s->allocated_size = 0;
 143
 144     return s;
 145 }
 146
 147 void pa_memblock_stat_unref(struct pa_memblock_stat *s) {
 148     assert(s && s->ref >= 1);
 149
 150     if (!(--(s->ref))) {
 151         assert(!s->total);
 152         pa_xfree(s);
 153     }
 154 }
 155
 156 struct pa_memblock_stat * pa_memblock_stat_ref(struct pa_memblock_stat *s) {
 157     assert(s);
 158     s->ref++;
 159     return s;
 160 }