qt6-bb10/tests
Marc Mutz d6c8fab880 QMutex: make sure we try_lock_for no shorter than the duration passed
By templating on the <chrono> types and unconditionally using
duration_cast to coerce the duration into a milliseconds, we
allowed code such as

   mutex.try_lock_for(10us)

to compile, which is misleading, since it's actually a zero-
timeout try_lock().

Feedback from the std-discussions mailing list is that the
wait_for functions should wait for _at least_ the duration
given, because that is the natural direction of variance
(tasks becoming ready to run might not get a CPU immediately,
causing delays), while an interface that documents to wait
_no more_ than the given duration is promising something it
cannot fulfill.

Fix by converting the given duration to the smallest number
of milliseconds not less than the original duration. If that
is not representable in an int, use INT_MAX, emulating the
effect of a spurious wakeup, which are allowed to happen if
the function returns false in that case.

In the above example, the try_lock_for call is now equivalent
to

  mutex.tryLock(1);

The tryLock() docs state that the actual waiting time does
not exceed the given milliseconds, but fixing that is a
separate issue.

Change-Id: Id4cbbea0ecc6fd2f94bb5aef28a1658be3728e52
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2016-11-22 11:32:35 +00:00
..
auto QMutex: make sure we try_lock_for no shorter than the duration passed 2016-11-22 11:32:35 +00:00
baselineserver Merge remote-tracking branch 'origin/5.7' into dev 2016-05-23 21:09:46 +02:00
benchmarks Change confusing Q_DEAD_CODE_FROM_QT4_FOO define 2016-10-14 08:19:29 +00:00
global tst_bic: Add linux-gcc-ia32 bic data for QtXml 2013-01-16 08:25:28 +01:00
manual Extend manual test windowflags 2016-11-18 18:58:16 +00:00
shared Windows CE cleanup. 2016-04-14 12:45:56 +00:00
README Doc: Fix references to Qt Test 2013-01-30 01:35:06 +01:00
tests.pro Use qtConfig throughout in qtbase 2016-08-19 04:28:05 +00:00

README

This directory contains autotests and benchmarks based on Qt Test. In order
to run the autotests reliably, you need to configure a desktop to match the
test environment that these tests are written for.

Linux X11:

   * The user must be logged in to an active desktop; you can't run the
     autotests without a valid DISPLAY that allows X11 connections.

   * The tests are run against a KDE3 or KDE4 desktop.

   * Window manager uses "click to focus", and not "focus follows mouse". Many
     tests move the mouse cursor around and expect this to not affect focus
     and activation.

   * Disable "click to activate", i.e., when a window is opened, the window
     manager should automatically activate it (give it input focus) and not
     wait for the user to click the window.