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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@309 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2004-11-21 21:31:28 +00:00
parent 2fb83d13f2
commit 4763ca1376
45 changed files with 428 additions and 81 deletions
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32
polyp/memblock.h
View file

@ -25,30 +25,54 @@
#include <sys/types.h>
#include <inttypes.h>
enum pa_memblock_type { PA_MEMBLOCK_FIXED, PA_MEMBLOCK_APPENDED, PA_MEMBLOCK_DYNAMIC, PA_MEMBLOCK_USER };
/* 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 */
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 */
};
/* A structure of keeping memory block statistics */
struct pa_memblock_stat;
struct pa_memblock {
enum pa_memblock_type type;
unsigned ref;
int read_only;
unsigned ref; /* the reference counter */
int read_only; /* boolean */
size_t length;
void *data;
void (*free_cb)(void *p);
void (*free_cb)(void *p); /* If type == PA_MEMBLOCK_USER this points to a function for freeing this memory block */
struct pa_memblock_stat *stat;
};
/* Allocate a new memory block of type PA_MEMBLOCK_APPENDED */
struct pa_memblock *pa_memblock_new(size_t length, struct 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 */
struct pa_memblock *pa_memblock_new_dynamic(void *data, size_t length, struct pa_memblock_stat*s);
/* Allocate a new memory block of type PA_MEMBLOCK_FIXED */
struct pa_memblock *pa_memblock_new_fixed(void *data, size_t length, int read_only, struct pa_memblock_stat*s);
/* Allocate a new memory block of type PA_MEMBLOCK_USER */
struct pa_memblock *pa_memblock_new_user(void *data, size_t length, void (*free_cb)(void *p), int read_only, struct pa_memblock_stat*s);
void pa_memblock_unref(struct pa_memblock*b);
struct pa_memblock* pa_memblock_ref(struct 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(struct pa_memblock*b);
/* Matinatins statistics about memory blocks */
struct pa_memblock_stat {
int ref;
unsigned total;