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gunixmounts: Prevent race when mtab file changed

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mtab_file_changed_id might be set on thread default context, but it is
always cleared on the global context because of usage of g_idle_add. This
can cause the emission of redundant "mounts-change" signals. This should
not cause any issues to the client application, but let's attach the idle
source to the thread-default context instead to avoid those races for sure.
This commit is contained in:
Ondrej Holy 2020-02-17 11:05:07 +01:00
parent 898a9c332e
commit ab278c0072
1 changed files with 13 additions and 1 deletions
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14
gio/gunixmounts.c
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@ -1756,6 +1756,9 @@ mtab_file_changed (GFileMonitor *monitor,
GFileMonitorEvent event_type,
gpointer user_data)
{
GMainContext *context;
GSource *source;
if (event_type != G_FILE_MONITOR_EVENT_CHANGED &&
event_type != G_FILE_MONITOR_EVENT_CREATED &&
event_type != G_FILE_MONITOR_EVENT_DELETED)
@ -1768,7 +1771,16 @@ mtab_file_changed (GFileMonitor *monitor,
if (mtab_file_changed_id > 0)
return;
mtab_file_changed_id = g_idle_add (mtab_file_changed_cb, NULL);
context = g_main_context_get_thread_default ();
if (!context)
context = g_main_context_default ();
source = g_idle_source_new ();
g_source_set_priority (source, G_PRIORITY_DEFAULT);
g_source_set_callback (source, mtab_file_changed_cb, NULL, NULL);
g_source_set_name (source, "[gio] mtab_file_changed_cb");
g_source_attach (source, context);
g_source_unref (source);
}
static gboolean