1 files changed, 86 insertions, 0 deletions
diff --git a/src/pulsecore/memblock.h b/src/pulsecore/memblock.h
new file mode 100644
index 00000000..f8545836
--- /dev/null
+++ b/src/pulsecore/memblock.h
@@ -0,0 +1,86 @@
+#ifndef foomemblockhfoo
+#define foomemblockhfoo
+
+/* $Id$ */
+
+/***
+  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.
+***/
+
+#include <sys/types.h>
+#include <inttypes.h>
+
+/* A pa_memblock is a reference counted memory block. Polypaudio
+ * passed references to pa_memblocks around instead of copying
+ * data. See pa_memchunk for a structure that describes parts of
+ * memory blocks. */
+
+/* The type of memory this block points to */
+typedef enum pa_memblock_type {
+    PA_MEMBLOCK_FIXED,     /* data is a pointer to fixed memory that needs not to be freed */
+    PA_MEMBLOCK_APPENDED,  /* The most common kind: the data is appended to the memory block */ 
+    PA_MEMBLOCK_DYNAMIC,   /* data is a pointer to some memory allocated with pa_xmalloc() */
+    PA_MEMBLOCK_USER       /* User supplied memory, to be freed with free_cb */
+} pa_memblock_type_t;
+
+/* A structure of keeping memory block statistics */
+/* Maintains statistics about memory blocks */
+typedef struct pa_memblock_stat {
+    int ref;
+    unsigned total;
+    unsigned total_size;
+    unsigned allocated;
+    unsigned allocated_size;
+} pa_memblock_stat;
+
+typedef struct pa_memblock {
+    pa_memblock_type_t type;
+    unsigned ref;  /* the reference counter */
+    int read_only; /* boolean */
+    size_t length;
+    void *data;
+    void (*free_cb)(void *p);  /* If type == PA_MEMBLOCK_USER this points to a function for freeing this memory block */
+    pa_memblock_stat *stat;
+} pa_memblock;
+
+/* Allocate a new memory block of type PA_MEMBLOCK_APPENDED */
+pa_memblock *pa_memblock_new(size_t length, pa_memblock_stat*s);
+
+/* Allocate a new memory block of type PA_MEMBLOCK_DYNAMIC. The pointer data is to be maintained be the memory block */
+pa_memblock *pa_memblock_new_dynamic(void *data, size_t length, pa_memblock_stat*s);
+
+/* Allocate a new memory block of type PA_MEMBLOCK_FIXED */
+pa_memblock *pa_memblock_new_fixed(void *data, size_t length, int read_only, pa_memblock_stat*s);
+
+/* Allocate a new memory block of type PA_MEMBLOCK_USER */
+pa_memblock *pa_memblock_new_user(void *data, size_t length, void (*free_cb)(void *p), int read_only, pa_memblock_stat*s);
+
+void pa_memblock_unref(pa_memblock*b);
+pa_memblock* pa_memblock_ref(pa_memblock*b);
+
+/* This special unref function has to be called by the owner of the
+memory of a static memory block when he wants to release all
+references to the memory. This causes the memory to be copied and
+converted into a PA_MEMBLOCK_DYNAMIC type memory block */
+void pa_memblock_unref_fixed(pa_memblock*b);
+
+pa_memblock_stat* pa_memblock_stat_new(void);
+void pa_memblock_stat_unref(pa_memblock_stat *s);
+pa_memblock_stat * pa_memblock_stat_ref(pa_memblock_stat *s);
+
+#endif