Add support to set thread priority to QThreadPool

Currently, QThreadPool's generated threads inherit the priority from the
thread they are created and that cannot be changed. This merge request
adds a property to QThreadPool so that the priority of the threads can
be different.

The default behavior does not change.

[ChangeLog][QtCore][QThreadPool] QThreadPool can now be configured to
use a different thread priority when creating new threads than the one
it inherits from the thread it was created in. This will only apply to
the threads started after the property is changed.

Fixes: QTBUG-3481
Change-Id: Ic98d4312d055a3357771abb656516ebd0715918d
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/corelib/thread/qthreadpool.h b/src/corelib/thread/qthreadpool.h
index a559eff49a..f3d7e2254b 100644
--- a/src/corelib/thread/qthreadpool.h
+++ b/src/corelib/thread/qthreadpool.h
@@ -60,6 +60,7 @@ class Q_CORE_EXPORT QThreadPool : public QObject
     Q_PROPERTY(int maxThreadCount READ maxThreadCount WRITE setMaxThreadCount)
     Q_PROPERTY(int activeThreadCount READ activeThreadCount)
     Q_PROPERTY(uint stackSize READ stackSize WRITE setStackSize)
+    Q_PROPERTY(QThread::Priority threadPriority READ threadPriority WRITE setThreadPriority)
     friend class QFutureInterfaceBase;
 
 public:
@@ -85,6 +86,9 @@ public:
     void setStackSize(uint stackSize);
     uint stackSize() const;
 
+    void setThreadPriority(QThread::Priority priority);
+    QThread::Priority threadPriority() const;
+
     void reserveThread();
     void releaseThread();