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macos: push to head of awaiting frames

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Always add to the head of awaiting frames as the list is processed
in the opposite direction.
This commit is contained in:
Christian Hergert 2022-01-29 17:05:48 -08:00
parent 936034e07a
commit 519a44d224
1 changed files with 5 additions and 1 deletions
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6
gdk/macos/gdkmacosdisplay.c
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@ -987,7 +987,11 @@ _gdk_macos_display_add_frame_callback (GdkMacosDisplay *self,
if (!queue_contains (&self->awaiting_frames, &surface->frame))
{
g_queue_push_tail_link (&self->awaiting_frames, &surface->frame);
/* Processing frames is always head to tail, so push to the
* head so that we don't possibly re-enter this right after
* adding to the queue.
*/
g_queue_push_head_link (&self->awaiting_frames, &surface->frame);
if (self->awaiting_frames.length == 1)
gdk_display_link_source_unpause ((GdkDisplayLinkSource *)self->frame_source);