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avcodec: Allow locking and unlocking an avformat specific mutex

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This extends the lock manager in avcodec to manage two separate
mutexes via the user-specified lock functions.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö
2011-10-30 01:20:15 +03:00
parent f6d3710096
commit 2d1b6fb72b
3 changed files with 27 additions and 1 deletions
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23
libavcodec/utils.c
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@ -48,6 +48,7 @@
static int volatile entangled_thread_counter=0;
static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
static void *codec_mutex;
static void *avformat_mutex;
void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
{
@ -1270,6 +1271,8 @@ int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
if (ff_lockmgr_cb) {
if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
return -1;
if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY))
return -1;
}
ff_lockmgr_cb = cb;
@ -1277,6 +1280,26 @@ int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
if (ff_lockmgr_cb) {
if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
return -1;
if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_CREATE))
return -1;
}
return 0;
}
int avpriv_lock_avformat(void)
{
if (ff_lockmgr_cb) {
if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))
return -1;
}
return 0;
}
int avpriv_unlock_avformat(void)
{
if (ff_lockmgr_cb) {
if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))
return -1;
}
return 0;
}