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| author | Po Lu <luangruo@yahoo.com> | 2022-08-26 09:42:35 +0800 |
|---|---|---|
| committer | Po Lu <luangruo@yahoo.com> | 2022-08-26 09:42:35 +0800 |
| commit | 8cad97e3db879e21663aea5da6138618f4901154 (patch) | |
| tree | 65822f1d5e1cba4d5376a507f3543f94ed07f8b7 | |
| parent | 7ffac97f4908f0eaf38364336c1844665dd17335 (diff) | |
| download | emacs-8cad97e3db879e21663aea5da6138618f4901154.tar.gz | |
Restore old code in x_sync_trigger_fence
* src/xterm.c (x_sync_trigger_fence): Restore old code, since that
makes it easier to adapt to more than 2 sync fences (which might be
necessary in the future, if we ever decide to do frame handling
asynchronously), and is much more recognizable for people coming from
other programs.
| -rw-r--r-- | src/xterm.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/xterm.c b/src/xterm.c index 5a36aa03029..b91d3a95173 100644 --- a/src/xterm.c +++ b/src/xterm.c @@ -6905,16 +6905,22 @@ x_sync_update_begin (struct frame *f) static void x_sync_trigger_fence (struct frame *f, XSyncValue value) { + uint_fast64_t n, low, high, idx; + /* Sync fences aren't supported by the X server. */ if (FRAME_DISPLAY_INFO (f)->xsync_major < 3 || (FRAME_DISPLAY_INFO (f)->xsync_major == 3 && FRAME_DISPLAY_INFO (f)->xsync_minor < 1)) return; - bool idx = !! (XSyncValueLow32 (value) & 4); + low = XSyncValueLow32 (value); + high = XSyncValueHigh32 (value); + + n = low | (high << 32); + idx = (n / 4) % 2; #ifdef FRAME_DEBUG - fprintf (stderr, "Triggering synchronization fence: %d\n", idx); + fprintf (stderr, "Triggering synchronization fence: %lu\n", idx); #endif XSyncTriggerFence (FRAME_X_DISPLAY (f), |