It's thread-safe, whereas trying to load qApp isn't in Qt 6.x (will be
in 7.0) and dereferencing it to call QObject::thread() will probably
never be. It's also faster, being a single function call instead of two
or three.
This is not an exhaustive search, it's just a few places I found while
searching for QThread::instance().
Change-Id: I3b4e1c75bb3966e2cd2dfffd79bfc8a40f6cf40b
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
(cherry picked from commit 6fb39ca2cbb111469ce09c8342997eb5375e3239)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit 54ef8bf929d9536f3cf6e1a360f72b1d7328f90f)
4252207e8f