79 lines
2.4 KiB
Diff
79 lines
2.4 KiB
Diff
This reverts the revert https://github.com/GNOME/glib/commit/4976e8109045b8aa72598668b809418d13e1f031
|
|
as it turns out to make e.g. LibreOffice eat 100% CPU ( #10807 )
|
|
|
|
--- glib/gmain.c 2018-01-08 21:00:49.000000000 +0100
|
|
+++ glib/gmain.c 2018-01-14 15:30:18.688036447 +0100
|
|
@@ -277,7 +277,8 @@
|
|
|
|
guint next_id;
|
|
GList *source_lists;
|
|
- gint in_check_or_prepare;
|
|
+ gboolean in_check_or_prepare;
|
|
+ gboolean need_wakeup;
|
|
|
|
GPollRec *poll_records;
|
|
guint n_poll_records;
|
|
@@ -651,6 +652,7 @@
|
|
|
|
context->pending_dispatches = g_ptr_array_new ();
|
|
|
|
+ context->need_wakeup = FALSE;
|
|
context->time_is_fresh = FALSE;
|
|
|
|
context->wakeup = g_wakeup_new ();
|
|
@@ -1127,17 +1129,11 @@
|
|
static void
|
|
conditional_wakeup (GMainContext *context)
|
|
{
|
|
- /* We want to signal wakeups in two cases:
|
|
- * 1 When the context is owned by another thread
|
|
- * 2 When the context owner is NULL (two subcases)
|
|
- * 2a Possible if the context has never been acquired
|
|
- * 2b Or if the context has no current owner
|
|
- *
|
|
- * At least case 2a) is necessary to ensure backwards compatibility with
|
|
- * qemu's use of GMainContext.
|
|
- * https://bugzilla.gnome.org/show_bug.cgi?id=761102#c14
|
|
+ /* This flag is set if at the start of prepare() we have no other ready
|
|
+ * sources, and hence would wait in poll(). In that case, any other threads
|
|
+ * attaching sources will need to signal a wakeup.
|
|
*/
|
|
- if (context->owner != G_THREAD_SELF)
|
|
+ if (context->need_wakeup)
|
|
g_wakeup_signal (context->wakeup);
|
|
}
|
|
|
|
@@ -3400,6 +3396,10 @@
|
|
|
|
LOCK_CONTEXT (context);
|
|
|
|
+ /* context->need_wakeup is protected by LOCK_CONTEXT/UNLOCK_CONTEXT,
|
|
+ * so need not set it yet.
|
|
+ */
|
|
+
|
|
context->time_is_fresh = FALSE;
|
|
|
|
if (context->in_check_or_prepare)
|
|
@@ -3525,6 +3525,8 @@
|
|
}
|
|
}
|
|
g_source_iter_clear (&iter);
|
|
+ /* See conditional_wakeup() where this is used */
|
|
+ context->need_wakeup = (n_ready == 0);
|
|
|
|
TRACE (GLIB_MAIN_CONTEXT_AFTER_PREPARE (context, current_priority, n_ready));
|
|
|
|
@@ -3659,6 +3661,12 @@
|
|
|
|
TRACE (GLIB_MAIN_CONTEXT_BEFORE_CHECK (context, max_priority, fds, n_fds));
|
|
|
|
+ /* We don't need to wakeup during check or dispatch, because
|
|
+ * all sources will be re-evaluated during prepare/query.
|
|
+ */
|
|
+ context->need_wakeup = FALSE;
|
|
+
|
|
+ /* And if we have a wakeup pending, acknowledge it */
|
|
for (i = 0; i < n_fds; i++)
|
|
{
|
|
if (fds[i].fd == context->wake_up_rec.fd)
|