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-rw-r--r--src/pulsecore/memblock.c173
1 files changed, 173 insertions, 0 deletions
diff --git a/src/pulsecore/memblock.c b/src/pulsecore/memblock.c
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index 00000000..36de17fb
--- /dev/null
+++ b/src/pulsecore/memblock.c
@@ -0,0 +1,173 @@
+/* $Id$ */
+
+/***
+ This file is part of PulseAudio.
+
+ PulseAudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ PulseAudio is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with PulseAudio; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+
+#include <pulse/xmalloc.h>
+
+#include "memblock.h"
+
+static void stat_add(pa_memblock*m, pa_memblock_stat *s) {
+ assert(m);
+
+ if (!s) {
+ m->stat = NULL;
+ return;
+ }
+
+ m->stat = pa_memblock_stat_ref(s);
+ s->total++;
+ s->allocated++;
+ s->total_size += m->length;
+ s->allocated_size += m->length;
+}
+
+static void stat_remove(pa_memblock *m) {
+ assert(m);
+
+ if (!m->stat)
+ return;
+
+ m->stat->total--;
+ m->stat->total_size -= m->length;
+
+ pa_memblock_stat_unref(m->stat);
+ m->stat = NULL;
+}
+
+pa_memblock *pa_memblock_new(size_t length, pa_memblock_stat*s) {
+ pa_memblock *b = pa_xmalloc(sizeof(pa_memblock)+length);
+ b->type = PA_MEMBLOCK_APPENDED;
+ b->ref = 1;
+ b->length = length;
+ b->data = b+1;
+ b->free_cb = NULL;
+ b->read_only = 0;
+ stat_add(b, s);
+ return b;
+}
+
+pa_memblock *pa_memblock_new_dynamic(void *d, size_t length, pa_memblock_stat*s) {
+ pa_memblock *b = pa_xmalloc(sizeof(pa_memblock));
+ b->type = PA_MEMBLOCK_DYNAMIC;
+ b->ref = 1;
+ b->length = length;
+ b->data = d;
+ b->free_cb = NULL;
+ b->read_only = 0;
+ stat_add(b, s);
+ return b;
+}
+
+pa_memblock *pa_memblock_new_fixed(void *d, size_t length, int read_only, pa_memblock_stat*s) {
+ pa_memblock *b = pa_xmalloc(sizeof(pa_memblock));
+ b->type = PA_MEMBLOCK_FIXED;
+ b->ref = 1;
+ b->length = length;
+ b->data = d;
+ b->free_cb = NULL;
+ b->read_only = read_only;
+ stat_add(b, s);
+ return b;
+}
+
+pa_memblock *pa_memblock_new_user(void *d, size_t length, void (*free_cb)(void *p), int read_only, pa_memblock_stat*s) {
+ pa_memblock *b;
+ assert(d && length && free_cb);
+ b = pa_xmalloc(sizeof(pa_memblock));
+ b->type = PA_MEMBLOCK_USER;
+ b->ref = 1;
+ b->length = length;
+ b->data = d;
+ b->free_cb = free_cb;
+ b->read_only = read_only;
+ stat_add(b, s);
+ return b;
+}
+
+pa_memblock* pa_memblock_ref(pa_memblock*b) {
+ assert(b);
+ assert(b->ref >= 1);
+
+ b->ref++;
+ return b;
+}
+
+void pa_memblock_unref(pa_memblock*b) {
+ assert(b);
+ assert(b->ref >= 1);
+
+ if ((--(b->ref)) == 0) {
+ stat_remove(b);
+
+ if (b->type == PA_MEMBLOCK_USER) {
+ assert(b->free_cb);
+ b->free_cb(b->data);
+ } else if (b->type == PA_MEMBLOCK_DYNAMIC)
+ pa_xfree(b->data);
+
+ pa_xfree(b);
+ }
+}
+
+void pa_memblock_unref_fixed(pa_memblock *b) {
+ assert(b && b->ref >= 1 && b->type == PA_MEMBLOCK_FIXED);
+
+ if (b->ref == 1)
+ pa_memblock_unref(b);
+ else {
+ b->data = pa_xmemdup(b->data, b->length);
+ b->type = PA_MEMBLOCK_DYNAMIC;
+ b->ref--;
+ }
+}
+
+pa_memblock_stat* pa_memblock_stat_new(void) {
+ pa_memblock_stat *s;
+
+ s = pa_xmalloc(sizeof(pa_memblock_stat));
+ s->ref = 1;
+ s->total = s->total_size = s->allocated = s->allocated_size = 0;
+
+ return s;
+}
+
+void pa_memblock_stat_unref(pa_memblock_stat *s) {
+ assert(s && s->ref >= 1);
+
+ if (!(--(s->ref))) {
+ assert(!s->total);
+ pa_xfree(s);
+ }
+}
+
+pa_memblock_stat * pa_memblock_stat_ref(pa_memblock_stat *s) {
+ assert(s);
+ s->ref++;
+ return s;
+}