diff options
author | André Klitzing <aklitzing@gmail.com> | 2020-05-19 12:50:35 +0200 |
---|---|---|
committer | Qt Cherry-pick Bot <cherrypick_bot@qt-project.org> | 2020-06-23 18:36:25 +0000 |
commit | c2ef25450a5983cff88a643370382110b56667f5 (patch) | |
tree | 27b77b5bebe7fae1681d3e15dbcb606840844d8e | |
parent | 47fbaf061f32c47ccd5dbbf8b19d695222b21795 (diff) |
Fix living QObject after shutdown of QCoreApplication
QThreadPool is a QObject and must be deleted if the QCoreApplication
is being destroyed to release the underlying ThreadData.
A Q_GLOBAL_STATIC won't release any memory is not able to
manually release it.
Task-number: QTBUG-84234
Change-Id: Ia82bcff2b564b753ed687f025ff86fa1bed1e64c
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry picked from commit 1304040e5d5af0575cac43aaf1424f72472c7b23)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
-rw-r--r-- | src/corelib/kernel/qcoreapplication.cpp | 4 | ||||
-rw-r--r-- | src/corelib/thread/qthreadpool.cpp | 11 |
2 files changed, 11 insertions, 4 deletions
diff --git a/src/corelib/kernel/qcoreapplication.cpp b/src/corelib/kernel/qcoreapplication.cpp index 5fdcc9b914..a97b68f372 100644 --- a/src/corelib/kernel/qcoreapplication.cpp +++ b/src/corelib/kernel/qcoreapplication.cpp @@ -878,8 +878,10 @@ QCoreApplication::~QCoreApplication() } QT_CATCH (...) { // swallow the exception, since destructors shouldn't throw } - if (globalThreadPool) + if (globalThreadPool) { globalThreadPool->waitForDone(); + delete globalThreadPool; + } #endif #ifndef QT_NO_QOBJECT diff --git a/src/corelib/thread/qthreadpool.cpp b/src/corelib/thread/qthreadpool.cpp index d2dcc32280..950c08ff80 100644 --- a/src/corelib/thread/qthreadpool.cpp +++ b/src/corelib/thread/qthreadpool.cpp @@ -40,13 +40,12 @@ #include "qthreadpool.h" #include "qthreadpool_p.h" #include "qdeadlinetimer.h" +#include "qcoreapplication.h" #include <algorithm> QT_BEGIN_NAMESPACE -Q_GLOBAL_STATIC(QThreadPool, theInstance) - /* QThread wrapper, provides synchronization against a ThreadPool */ @@ -478,7 +477,13 @@ QThreadPool::~QThreadPool() */ QThreadPool *QThreadPool::globalInstance() { - return theInstance(); + static QPointer<QThreadPool> theInstance; + static QBasicMutex theMutex; + + const QMutexLocker locker(&theMutex); + if (theInstance.isNull() && !QCoreApplication::closingDown()) + theInstance = new QThreadPool(); + return theInstance; } /*! |