[Wayland-bugs] [Bug 90573] Handle timeouts before events after that timeout

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90573

            Bug ID: 90573
           Summary: Handle timeouts before events after that timeout
           Product: Wayland
           Version: unspecified
          Hardware: Other
                OS: All
            Status: ASSIGNED
          Severity: normal
          Priority: medium
         Component: libinput
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: peter.hutterer at who-t.net

If a timeout hits and events come in, it depends on whichever fd is read first
on what order the events are handled. If the device is handled first, the
events may be processed as if the timeout never happened.

This is particularly noticable in the test, if we call litest_timeout_..()
without a subsequent litest_dispatch(), the timeout is usually ignored.

We need a mechanism to compare event timestamps to timer triggers and yield if
the other one is earlier. This goes both ways, if litest_dispatch() didn't get
called for a while we need to process any events with times before the timeout
triggered.

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