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thread-pool: avoid race in shutdown

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If we call g_main_loop_quit before the thread has entered g_main_loop_run, we
don't actually stop the mainloop ever. Solve this race by adding an idle source
to the mainloop that calls the _quit. This way we immediately exit the mainloop
if quit was called before we started it.
This commit is contained in:
Wim Taymans 2013-11-12 10:28:55 +01:00
parent a2eb48a27c
commit c4ae13dbb5
1 changed files with 21 additions and 8 deletions
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29
gst/rtsp-server/rtsp-thread-pool.c
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@ -141,6 +141,14 @@ gst_rtsp_thread_reuse (GstRTSPThread * thread)
return g_atomic_int_add (&impl->reused, 1) > 0;
}
static gboolean
do_quit (GstRTSPThread * thread)
{
GST_DEBUG ("stop mainloop of thread %p", thread);
g_main_loop_quit (thread->loop);
return FALSE;
}
/**
* gst_rtsp_thread_stop:
* @thread: (transfer full): a #GstRTSPThread
@ -158,11 +166,15 @@ gst_rtsp_thread_stop (GstRTSPThread * thread)
GST_DEBUG ("stop thread %p", thread);
if (g_atomic_int_dec_and_test (&impl->reused)) {
GST_DEBUG ("stop mainloop of thread %p", thread);
g_main_loop_quit (thread->loop);
}
GSource *source;
gst_rtsp_thread_unref (thread);
GST_DEBUG ("add idle source to quit mainloop of thread %p", thread);
source = g_idle_source_new ();
g_source_set_callback (source, (GSourceFunc) do_quit,
thread, (GDestroyNotify) gst_rtsp_thread_unref);
g_source_attach (source, thread->context);
g_source_unref (source);
}
}
#define GST_RTSP_THREAD_POOL_GET_PRIVATE(obj) \
@ -453,7 +465,7 @@ default_get_thread (GstRTSPThreadPool * pool,
thread = make_thread (pool, type, ctx);
if (!g_thread_pool_push (klass->pool, gst_rtsp_thread_ref (thread),
&error))
&error))
goto thread_error;
}
g_queue_push_tail (&priv->threads, thread);
@ -465,7 +477,7 @@ default_get_thread (GstRTSPThreadPool * pool,
thread = make_thread (pool, type, ctx);
if (!g_thread_pool_push (klass->pool, gst_rtsp_thread_ref (thread),
&error))
&error))
goto thread_error;
break;
default:
@ -535,8 +547,9 @@ gst_rtsp_thread_pool_cleanup (void)
{
GstRTSPThreadPoolClass *klass;
klass = GST_RTSP_THREAD_POOL_CLASS (
g_type_class_peek (gst_rtsp_thread_pool_get_type ()));
klass =
GST_RTSP_THREAD_POOL_CLASS (g_type_class_peek
(gst_rtsp_thread_pool_get_type ()));
if (klass->pool != NULL) {
g_thread_pool_free (klass->pool, FALSE, TRUE);
klass->pool = NULL;