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backends/x11: Improve grab-device clock updates

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meta_backend_x11_grab_device is performing X server clock comparison
using the MAX macro, which comes down to a simple greater-than.

Use XSERVER_TIME_IS_BEFORE, which is a better macro for X server
clock comparisons, as it accounts for 32-bit wrap-around.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/174

(cherry picked from commit 1bfa20929b36d06cc23667d1122175149615b56d)
This commit is contained in:
Jeff Smith 2018-07-20 00:41:43 -05:00 committed by Marco Trevisan (Treviño)
parent 1276cc97d1
commit a41ae88c09
1 changed files with 3 additions and 2 deletions
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5
src/backends/x11/meta-backend-x11.c
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@ -547,8 +547,9 @@ meta_backend_x11_grab_device (MetaBackend *backend,
XIEventMask mask = { XIAllMasterDevices, sizeof (mask_bits), mask_bits };
int ret;
if (timestamp != CurrentTime)
timestamp = MAX (timestamp, priv->latest_evtime);
if (timestamp != CurrentTime &&
XSERVER_TIME_IS_BEFORE (timestamp, priv->latest_evtime))
timestamp = priv->latest_evtime;
XISetMask (mask.mask, XI_ButtonPress);
XISetMask (mask.mask, XI_ButtonRelease);