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FS-7906: [mod_av] correct crash from multithreaded opening or closing of multiple files at the same time

This commit is contained in:
Michael Jerris 2015-07-29 14:09:48 -05:00
parent 3d20f7eac1
commit 543fab93dd
1 changed files with 52 additions and 1 deletions
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53
src/mod/applications/mod_av/mod_av.c
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@ -40,6 +40,56 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_av_load);
SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_av_shutdown);
SWITCH_MODULE_DEFINITION(mod_av, mod_av_load, mod_av_shutdown, NULL);
typedef struct av_mutex_helper_s {
switch_mutex_t *mutex;
switch_memory_pool_t *pool;
} av_mutex_helper_t;
int mod_av_lockmgr_cb(void **m, enum AVLockOp op)
{
av_mutex_helper_t *context = NULL;
if (!m) return -1;
context = (av_mutex_helper_t *)*m;
switch(op)
{
case AV_LOCK_CREATE:
{
switch_memory_pool_t *pool;
switch_core_new_memory_pool(&pool);
context = switch_core_alloc(pool, sizeof(av_mutex_helper_t));
switch_mutex_init(&context->mutex, SWITCH_MUTEX_NESTED, pool);
context->pool = pool;
*m = (void *)context;
break;
}
case AV_LOCK_OBTAIN:
{
switch_mutex_t *mutex = context->mutex;
if (!mutex) return -1;
switch_mutex_lock(mutex);
break;
}
case AV_LOCK_RELEASE:
{
switch_mutex_t *mutex = context->mutex;
if (!mutex) return -1;
switch_mutex_unlock(mutex);
break;
}
case AV_LOCK_DESTROY:
{
switch_core_destroy_memory_pool(&context->pool);
break;
}
default:
break;
}
return 0;
}
static void log_callback(void *ptr, int level, const char *fmt, va_list vl)
{
switch_log_level_t switch_level = SWITCH_LOG_DEBUG;
@ -68,12 +118,13 @@ SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_av_shutdown)
{
avformat_network_deinit();
av_log_set_callback(NULL);
av_lockmgr_register(NULL);
return SWITCH_STATUS_SUCCESS;
}
SWITCH_MODULE_LOAD_FUNCTION(mod_av_load)
{
av_lockmgr_register(&mod_av_lockmgr_cb);
av_log_set_callback(log_callback);
av_log_set_level(AV_LOG_INFO);
avformat_network_init();