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Handle xcb_wait_for_special_events failure

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Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
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Yuxuan Shui 2019-02-25 01:43:01 +00:00
parent 29ceea8412
commit 2699367b46
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GPG key ID: 37C999F617EA1A47
1 changed files with 7 additions and 0 deletions
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7
src/backend/xrender.c
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@ -548,6 +548,13 @@ static void present(void *backend_data, session_t *ps) {
// TODO don't block wait for present completion
xcb_present_generic_event_t *pev =
(void *)xcb_wait_for_special_event(ps->c, xd->present_event);
if (!pev) {
// We don't know what happened, maybe X died
// But reset buffer age, so in case we do recover, we will
// render correctly.
xd->buffer_age[0] = xd->buffer_age[1] = -1;
return;
}
assert(pev->evtype == XCB_PRESENT_COMPLETE_NOTIFY);
xcb_present_complete_notify_event_t *pcev = (void *)pev;
// log_trace("Present complete: %d %ld", pcev->mode, pcev->msc);