/**
* gst_rtsp_session_pool_create:
* @pool: a #GstRTSPSessionPool
*
* Create a new #GstRTSPSession object in @pool.
*
* Returns: a new #GstRTSPSession.
*/
GstRTSPSession *
gst_rtsp_session_pool_create (GstRTSPSessionPool * pool)
{
GstRTSPSession *result = NULL;
GstRTSPSessionPoolClass *klass;
gchar *id = NULL;
guint retry;
g_return_val_if_fail (GST_IS_RTSP_SESSION_POOL (pool), NULL);
klass = GST_RTSP_SESSION_POOL_GET_CLASS (pool);
retry = 0;
do {
/* start by creating a new random session id, we assume that this is random
* enough to not cause a collision, which we will check later */
if (klass->create_session_id)
id = klass->create_session_id (pool);
else
goto no_function;
if (id == NULL)
goto no_session;
g_mutex_lock (&pool->lock);
/* check session limit */
if (pool->max_sessions > 0) {
if (g_hash_table_size (pool->sessions) >= pool->max_sessions)
goto too_many_sessions;
}
/* check if the sessionid existed */
result = g_hash_table_lookup (pool->sessions, id);
if (result) {
/* found, retry with a different session id */
result = NULL;
retry++;
if (retry > 100)
goto collision;
} else {
/* not found, create session and insert it in the pool */
result = gst_rtsp_session_new (id);
/* take additional ref for the pool */
g_object_ref (result);
g_hash_table_insert (pool->sessions, result->sessionid, result);
}
g_mutex_unlock (&pool->lock);
g_free (id);
} while (result == NULL);
return result;
/* ERRORS */
no_function:
{
GST_WARNING ("no create_session_id vmethod in GstRTSPSessionPool %p", pool);
return NULL;
}
no_session:
{
GST_WARNING ("can't create session id with GstRTSPSessionPool %p", pool);
return NULL;
}
collision:
{
GST_WARNING ("can't find unique sessionid for GstRTSPSessionPool %p", pool);
g_mutex_unlock (&pool->lock);
g_free (id);
return NULL;
}
too_many_sessions:
{
GST_WARNING ("session pool reached max sessions of %d", pool->max_sessions);
g_mutex_unlock (&pool->lock);
g_free (id);
return NULL;
}
}
static GstRTSPSession *
create_session (GstRTSPSessionPool * pool, const gchar * id)
{
return gst_rtsp_session_new (id);
}
