Added support for handling multiple instances.

src/thread_ipc.cpp

@@ -0,0 +1,136 @@
+///////////////////////////////////////////////////////////////////////////////
+// Simple x264 Launcher
+// Copyright (C) 2004-2012 LoRd_MuldeR <MuldeR2@GMX.de>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// http://www.gnu.org/licenses/gpl-2.0.txt
+///////////////////////////////////////////////////////////////////////////////
+
+#include "thread_ipc.h"
+#include "global.h"
+
+#include <QSystemSemaphore>
+#include <QSharedMemory>
+
+static const char* s_key[3] = 
+{
+	"{53F0CAC8-75BC-449A-91DF-2417B2867087}",
+	"{20BD6A5F-B510-4764-937D-EE6598271801}",
+	"{F09C3D10-EC27-4F4D-BF9C-9957A23B8A70}"
+};
+
+IPCThread::IPCThread(void)
+{
+	m_ipcReady = m_firstInstance = m_abort = false;
+
+	m_semaphore_r = new QSystemSemaphore(QString::fromLatin1(s_key[0]), 0);
+	m_semaphore_w = new QSystemSemaphore(QString::fromLatin1(s_key[1]), 1);
+	m_sharedMem = new QSharedMemory(QString::fromLatin1(s_key[2]));
+}
+
+IPCThread::~IPCThread(void)
+{
+	X264_DELETE(m_semaphore_r);
+	X264_DELETE(m_semaphore_w);
+	X264_DELETE(m_sharedMem);
+}
+
+bool IPCThread::initialize(bool *firstInstance)
+{
+	if(!m_ipcReady)
+	{
+		if((m_semaphore_r->error() == 0) && (m_semaphore_w->error() == 0) && (m_sharedMem->error() == 0))
+		{
+			if(m_sharedMem->create(sizeof(DWORD), QSharedMemory::ReadWrite))
+			{
+				m_firstInstance = m_ipcReady = true;
+			}
+			else
+			{
+				if(m_sharedMem->attach(QSharedMemory::ReadWrite))
+				{
+					m_ipcReady = true;
+				}
+			}
+		}
+	}
+	
+	if(firstInstance)
+	{
+		*firstInstance = m_firstInstance;
+	}
+
+	return m_ipcReady;
+}
+
+void IPCThread::notifyOtherInstance(void)
+{
+	if(!m_firstInstance)
+	{
+		m_semaphore_w->acquire();
+		DWORD *pidPtr = reinterpret_cast<DWORD*>(m_sharedMem->data());
+		*pidPtr = GetCurrentProcessId();
+		m_semaphore_r->release();
+	}
+}
+
+void IPCThread::start(Priority priority)
+{
+	m_abort = false;
+
+	if(!m_ipcReady)
+	{
+		throw "IPC not initialized yet !!!";
+		return;
+	}
+	
+	if(!m_firstInstance)
+	{
+		qWarning("This is NOT the first instance!");
+		return;
+	}
+
+	QThread::start(priority);
+}
+
+void IPCThread::setAbort(void)
+{
+	m_abort = true;
+	if(m_semaphore_r)
+	{
+		m_semaphore_r->release();
+	}
+}
+
+void IPCThread::run(void)
+{
+	forever
+	{
+		if(!m_semaphore_r->acquire())
+		{
+			qWarning("IPCThread: System error !!!");
+			qWarning("IPCThread: %s\n", m_semaphore_r->errorString().toLatin1().constData());
+			break;
+		}
+		if(m_abort)
+		{
+			break;
+		}
+		const DWORD procId = *reinterpret_cast<const DWORD*>(m_sharedMem->constData());
+		m_semaphore_w->release();
+		emit instanceCreated(procId);
+	}
+}

src/thread_ipc.h

@@ -0,0 +1,59 @@
+///////////////////////////////////////////////////////////////////////////////
+// Simple x264 Launcher
+// Copyright (C) 2004-2012 LoRd_MuldeR <MuldeR2@GMX.de>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// http://www.gnu.org/licenses/gpl-2.0.txt
+///////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+#include "global.h"
+#include <QThread>
+
+class QSystemSemaphore;
+class QSharedMemory;
+
+class IPCThread : public QThread
+{
+	Q_OBJECT
+
+public:
+	IPCThread(void);
+	~IPCThread(void);
+
+	void setAbort(void);
+	bool initialize(bool *firstInstance = NULL);
+	void notifyOtherInstance(void);
+
+signals:
+	void instanceCreated(DWORD pid);
+
+public slots:
+	void start(Priority priority = InheritPriority);
+
+protected:
+	volatile bool m_abort;
+
+	QSystemSemaphore *m_semaphore_r;
+	QSystemSemaphore *m_semaphore_w;
+	QSharedMemory *m_sharedMem;
+
+	bool m_ipcReady;
+	bool m_firstInstance;
+
+	virtual void run(void);
+};

src/version.h

@@ -22,7 +22,7 @@
 #define VER_X264_MAJOR 2
 #define VER_X264_MINOR 0
 #define VER_X264_PATCH 2
-#define VER_X264_BUILD 222
+#define VER_X264_BUILD 238
 
 #define VER_X264_MINIMUM_REV 2146
 #define VER_X264_CURRENT_API 120

src/win_main.cpp

@@ -72,6 +72,7 @@ MainWindow::MainWindow(const x264_cpu_t *const cpuFeatures)
 
 	//Register meta types
 	qRegisterMetaType<QUuid>("QUuid");
+	qRegisterMetaType<QUuid>("DWORD");
 	qRegisterMetaType<EncodeThread::JobStatus>("EncodeThread::JobStatus");
 
 	//Load preferences
@@ -82,6 +83,10 @@ MainWindow::MainWindow(const x264_cpu_t *const cpuFeatures)
 	m_options = new OptionsModel();
 	OptionsModel::loadTemplate(m_options, QString::fromLatin1(tpl_last));
 
+	//Create IPC thread object
+	m_ipcThread = new IPCThread();
+	connect(m_ipcThread, SIGNAL(instanceCreated(DWORD)), this, SLOT(instanceCreated(DWORD)), Qt::QueuedConnection);
+
 	//Freeze minimum size
 	setMinimumSize(size());
 	splitter->setSizes(QList<int>() << 16 << 196);
@@ -177,6 +182,18 @@ MainWindow::~MainWindow(void)
 		QFile *temp = m_toolsList.takeFirst();
 		X264_DELETE(temp);
 	}
+
+	if(m_ipcThread->isRunning())
+	{
+		m_ipcThread->setAbort();
+		if(!m_ipcThread->wait(5000))
+		{
+			m_ipcThread->terminate();
+			m_ipcThread->wait();
+		}
+	}
+
+	X264_DELETE(m_ipcThread);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -617,6 +634,18 @@ void MainWindow::init(void)
 
 	updateLabelPos();
 
+	//Check for a running instance
+	bool firstInstance = false;
+	if(m_ipcThread->initialize(&firstInstance))
+	{
+		if(!firstInstance)
+		{
+			m_ipcThread->notifyOtherInstance();
+			close(); qApp->exit(-1); return;
+		}
+		m_ipcThread->start();
+	}
+
 	//Check all binaries
 	while(!binaries.isEmpty())
 	{
@@ -800,6 +829,24 @@ void MainWindow::handleDroppedFiles(void)
 	qDebug("Leave from MainWindow::handleDroppedFiles!");
 }
 
+void MainWindow::instanceCreated(DWORD pid)
+{
+	qDebug("Notification from other instance received!");
+	
+	FLASHWINFO flashWinInfo;
+	memset(&flashWinInfo, 0, sizeof(FLASHWINFO));
+	flashWinInfo.cbSize = sizeof(FLASHWINFO);
+	flashWinInfo.hwnd = this->winId();
+	flashWinInfo.dwFlags = FLASHW_ALL;
+	flashWinInfo.dwTimeout = 125;
+	flashWinInfo.uCount = 5;
+
+	SwitchToThisWindow(this->winId(), TRUE);
+	SetForegroundWindow(this->winId());
+	qApp->processEvents();
+	FlashWindowEx(&flashWinInfo);
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 // Event functions
 ///////////////////////////////////////////////////////////////////////////////

src/win_main.h

@@ -22,6 +22,7 @@
 #pragma once
 
 #include "uic_win_main.h"
+#include "thread_ipc.h"
 #include "thread_encode.h"
 #include "win_preferences.h"
 #include "global.h"
@@ -51,6 +52,7 @@ protected:
 private:
 	bool m_firstShow;
 	QLabel *m_label;
+	IPCThread *m_ipcThread;
 
 	JobListModel *m_jobList;
 	OptionsModel *m_options;
@@ -76,6 +78,7 @@ private slots:
 	void copyLogToClipboard(bool checked);
 	void handleDroppedFiles(void);
 	void init(void);
+	void instanceCreated(DWORD pid);
 	void jobSelected(const QModelIndex & current, const QModelIndex & previous);
 	void jobChangedData(const  QModelIndex &top, const  QModelIndex &bottom);
 	void jobLogExtended(const QModelIndex & parent, int start, int end);

x264_launcher.vcxproj

@@ -248,6 +248,14 @@ copy "$(SolutionDir)res\toolset\*.exe" "$(SolutionDir)bin\$(Configuration)\tools
     <ClInclude Include="src\model_options.h" />
     <ClInclude Include="src\targetver.h" />
     <ClInclude Include="src\taskbar7.h" />
+    <CustomBuild Include="src\thread_ipc.h">
+      <Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">"$(QTDIR)\bin\moc.exe" -o "$(SolutionDir)tmp\moc\moc_%(Filename).cpp" "%(FullPath)"</Command>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">"$(QTDIR)\bin\moc.exe" -o "$(SolutionDir)tmp\moc\moc_%(Filename).cpp" "%(FullPath)"</Command>
+      <Message Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">MOC "$(SolutionDir)tmp\moc\moc_%(Filename).cpp"</Message>
+      <Message Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">MOC "$(SolutionDir)tmp\moc\moc_%(Filename).cpp"</Message>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(SolutionDir)tmp\moc\moc_%(Filename).cpp;%(Outputs)</Outputs>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">$(SolutionDir)tmp\moc\moc_%(Filename).cpp;%(Outputs)</Outputs>
+    </CustomBuild>
     <ClInclude Include="src\version.h" />
     <CustomBuild Include="src\win_main.h">
       <Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">"$(QTDIR)\bin\moc.exe" -o "$(SolutionDir)tmp\moc\moc_%(Filename).cpp" "%(FullPath)"</Command>
@@ -266,6 +274,7 @@ copy "$(SolutionDir)res\toolset\*.exe" "$(SolutionDir)bin\$(Configuration)\tools
     <ClCompile Include="src\thread_encode.cpp" />
     <ClCompile Include="src\global.cpp" />
     <ClCompile Include="src\main.cpp" />
+    <ClCompile Include="src\thread_ipc.cpp" />
     <ClCompile Include="src\win_addJob.cpp" />
     <ClCompile Include="src\win_editor.cpp" />
     <ClCompile Include="src\win_help.cpp" />
@@ -274,6 +283,7 @@ copy "$(SolutionDir)res\toolset\*.exe" "$(SolutionDir)bin\$(Configuration)\tools
     <ClCompile Include="tmp\moc\moc_model_jobList.cpp" />
     <ClCompile Include="tmp\moc\moc_model_logFile.cpp" />
     <ClCompile Include="tmp\moc\moc_thread_encode.cpp" />
+    <ClCompile Include="tmp\moc\moc_thread_ipc.cpp" />
     <ClCompile Include="tmp\moc\moc_win_addJob.cpp" />
     <ClCompile Include="tmp\moc\moc_win_editor.cpp" />
     <ClCompile Include="tmp\moc\moc_win_help.cpp" />

x264_launcher.vcxproj.filters

@@ -113,6 +113,12 @@
     <ClCompile Include="tmp\moc\moc_win_editor.cpp">
       <Filter>Generated Files</Filter>
     </ClCompile>
+    <ClCompile Include="src\thread_ipc.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="tmp\moc\moc_thread_ipc.cpp">
+      <Filter>Generated Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <CustomBuild Include="src\win_main.h">
@@ -157,6 +163,9 @@
     <CustomBuild Include="src\win_editor.h">
       <Filter>Header Files</Filter>
     </CustomBuild>
+    <CustomBuild Include="src\thread_ipc.h">
+      <Filter>Header Files</Filter>
+    </CustomBuild>
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="x264_launcher.rc">