vl: Introduce shutdown_notifiers

[thirdparty/qemu.git] / iothread.c

diff --git a/iothread.c b/iothread.c
index e675c38442235120d1d0e911e7c0caedd00353f1..2fb1cdf55d10b882c78276221a0d0caaeba388a2 100644 (file)
--- a/iothread.c
+++ b/iothread.c
@@ -110,6 +110,7 @@ static void iothread_instance_init(Object *obj)
     IOThread *iothread = IOTHREAD(obj);
 
     iothread->poll_max_ns = IOTHREAD_POLL_MAX_NS_DEFAULT;
+    iothread->thread_id = -1;
 }
 
 static void iothread_instance_finalize(Object *obj)
@@ -117,16 +118,29 @@ static void iothread_instance_finalize(Object *obj)
     IOThread *iothread = IOTHREAD(obj);
 
     iothread_stop(iothread);
+
+    if (iothread->thread_id != -1) {
+        qemu_cond_destroy(&iothread->init_done_cond);
+        qemu_mutex_destroy(&iothread->init_done_lock);
+    }
+    /*
+     * Before glib2 2.33.10, there is a glib2 bug that GSource context
+     * pointer may not be cleared even if the context has already been
+     * destroyed (while it should).  Here let's free the AIO context
+     * earlier to bypass that glib bug.
+     *
+     * We can remove this comment after the minimum supported glib2
+     * version boosts to 2.33.10.  Before that, let's free the
+     * GSources first before destroying any GMainContext.
+     */
+    if (iothread->ctx) {
+        aio_context_unref(iothread->ctx);
+        iothread->ctx = NULL;
+    }
     if (iothread->worker_context) {
         g_main_context_unref(iothread->worker_context);
         iothread->worker_context = NULL;
     }
-    qemu_cond_destroy(&iothread->init_done_cond);
-    qemu_mutex_destroy(&iothread->init_done_lock);
-    if (!iothread->ctx) {
-        return;
-    }
-    aio_context_unref(iothread->ctx);
 }
 
 static void iothread_complete(UserCreatable *obj, Error **errp)
@@ -137,7 +151,6 @@ static void iothread_complete(UserCreatable *obj, Error **errp)
 
     iothread->stopping = false;
     iothread->running = true;
-    iothread->thread_id = -1;
     iothread->ctx = aio_context_new(&local_error);
     if (!iothread->ctx) {
         error_propagate(errp, local_error);