Ivan Solovev 41a605e0f2 Fix QThreadPool::maxThreadCount() usage
The docs claim that QThreadPool always creates at least one thread.
However, the user can (usually by mistake) request zero or a negative
number of threads.
The maxThreadCount() function is simply returning the value, that was
requested by the user.
Since it's a public API, it is used in several places in QtConcurrent,
where it is assumed that the value is always positive. This can lead
to a crash if the user sets zero as a maxThreadCount.

Update all such places with std::max(maxThreadCount(), 1).
Prefer this approach over changing the return value of
maxThreadCount(), because its behavior is documented and tested.

Amends 885eff053797d56f2e295558d0a71b030fbb1a69.

Fixes: QTBUG-120335
Pick-to: 6.6 6.5 6.2
Change-Id: Id3b2087cec7fbc7a2d42febca6586f2dacffe444
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry picked from commit 936e72d18075b79c8d29353618dfbd052ae59dae)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
2024-01-12 11:06:00 +00:00
..
2022-05-16 16:37:38 +02:00
2023-04-13 18:30:58 +02:00

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.