From caf80d88243aaa00e8f1baeaa6b7e4c3aca75f63 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Thu, 6 Dec 2012 18:29:37 -0600 Subject: Add threading tutorial and fix a couple rare crashes --- src/kernel/qeventloop_x11.cpp | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'src/kernel/qeventloop_x11.cpp') diff --git a/src/kernel/qeventloop_x11.cpp b/src/kernel/qeventloop_x11.cpp index cd3e865..5ee41ca 100644 --- a/src/kernel/qeventloop_x11.cpp +++ b/src/kernel/qeventloop_x11.cpp @@ -284,7 +284,8 @@ bool QEventLoop::processEvents( ProcessEventsFlags flags ) // unlock the GUI mutex and select. when we return from this function, there is // something for us to do #if defined(QT_THREAD_SUPPORT) - locker.mutex()->unlock(); + if ( locker.mutex() ) locker.mutex()->unlock(); + else return false; #endif int nsel; @@ -298,7 +299,8 @@ bool QEventLoop::processEvents( ProcessEventsFlags flags ) // relock the GUI mutex before processing any pending events #if defined(QT_THREAD_SUPPORT) - locker.mutex()->lock(); + if ( locker.mutex() ) locker.mutex()->lock(); + else return false; #endif // we are awake, broadcast it -- cgit v1.2.3