Make sure posted events are always sent when calling processEvents() on Win32

After 31f1ff910, posted events could be delayed by a previous call to
processEvents(). This causes some tests to randomly fail, so bring back
the invariant that processEvents() will always call sendPostedEvents() when
called "manually" (i.e. not from exec()).

Reviewed-by: Prasanth Ullattil

1 files changed, 5 insertions, 0 deletions

diff --git a/src/corelib/kernel/qeventdispatcher_win.cpp b/src/corelib/kernel/qeventdispatcher_win.cpp
index 3050b82..0518e24 100644
--- a/src/corelib/kernel/qeventdispatcher_win.cpp
+++ b/src/corelib/kernel/qeventdispatcher_win.cpp
@@ -675,6 +675,11 @@ bool QEventDispatcherWin32::processEvents(QEventLoop::ProcessEventsFlags flags)
     bool seenWM_QT_SENDPOSTEDEVENTS = false;
     bool needWM_QT_SENDPOSTEDEVENTS = false;
     do {
+        if (! (flags & QEventLoop::EventLoopExec)) {
+            // when called "manually", always send posted events
+            QCoreApplicationPrivate::sendPostedEvents(0, 0, d->threadData);
+        }
+
         DWORD waitRet = 0;
         HANDLE pHandles[MAXIMUM_WAIT_OBJECTS - 1];
         QVarLengthArray<MSG> processedTimers;