Delay creation of the process manager

The *nix process manager would create a pipe on every startup. In order
to improve startup speed, the QProcessManager is now created when first
needed.

Reviewed-by: Robert Griebl

3 files changed, 15 insertions, 6 deletions

diff --git a/src/corelib/kernel/qcoreapplication.cpp b/src/corelib/kernel/qcoreapplication.cpp
index 0f95ee0..799433b 100644
--- a/src/corelib/kernel/qcoreapplication.cpp
+++ b/src/corelib/kernel/qcoreapplication.cpp
@@ -336,6 +336,16 @@ void QCoreApplicationPrivate::createEventDispatcher()
 #endif
 }
 
+void QCoreApplicationPrivate::_q_initializeProcessManager()
+{
+#ifndef QT_NO_PROCESS
+#  ifdef Q_OS_UNIX
+    QProcessPrivate::initializeProcessManager();
+#  endif
+#endif
+}
+
+
 QThread *QCoreApplicationPrivate::theMainThread = 0;
 QThread *QCoreApplicationPrivate::mainThread()
 {
@@ -600,12 +610,6 @@ void QCoreApplication::init()
     }
 #endif
 
-#if defined(Q_OS_UNIX) && !(defined(QT_NO_PROCESS))
-    // Make sure the process manager thread object is created in the main
-    // thread.
-    QProcessPrivate::initializeProcessManager();
-#endif
-
 #ifdef QT_EVAL
     extern void qt_core_eval_init(uint);
     qt_core_eval_init(d->application_type);
@@ -2666,3 +2670,5 @@ int QCoreApplication::loopLevel()
 */
 
 QT_END_NAMESPACE
+
+#include "moc_qcoreapplication.cpp"
diff --git a/src/corelib/kernel/qcoreapplication.h b/src/corelib/kernel/qcoreapplication.h
index f1c7c26..17e784e 100644
--- a/src/corelib/kernel/qcoreapplication.h
+++ b/src/corelib/kernel/qcoreapplication.h
@@ -205,6 +205,7 @@ protected:
     QCoreApplication(QCoreApplicationPrivate &p);
 
 private:
+    Q_PRIVATE_SLOT(d_func(), void _q_initializeProcessManager())
     static bool sendSpontaneousEvent(QObject *receiver, QEvent *event);
     bool notifyInternal(QObject *receiver, QEvent *event);
 
diff --git a/src/corelib/kernel/qcoreapplication_p.h b/src/corelib/kernel/qcoreapplication_p.h
index 2355c37..aafa821 100644
--- a/src/corelib/kernel/qcoreapplication_p.h
+++ b/src/corelib/kernel/qcoreapplication_p.h
@@ -82,6 +82,8 @@ public:
     bool sendThroughObjectEventFilters(QObject *, QEvent *);
     bool notify_helper(QObject *, QEvent *);
 
+    void _q_initializeProcessManager();
+
     virtual QString appName() const;
     virtual void createEventDispatcher();
     static void removePostedEvent(QEvent *);