diff options
| 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 /src | |
| 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.
Diffstat (limited to 'src')
| -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), |