More thread sync fixes (these mostly only showed up on linux, because of threads starting a lot slower); fixed by including a startup signal to let the creating thread know when the worker has aquired its persistent locks.

git-svn-id: http://pcsx2.googlecode.com/svn/trunk@2029 96395faa-99c1-11dd-bbfe-3dabce05a288

pcsx2/MTGS.cpp

@@ -237,8 +237,8 @@ void mtgsThreadObject::OpenPlugin()
 
 void mtgsThreadObject::ExecuteTaskInThread()
 {
-	// Required by the underlying SysThreadBase class (is unlocked on exit)
 	m_RunningLock.Lock();
+	m_StartupEvent.Post();
 
 #ifdef RINGBUF_DEBUG_STACK
 	PacketTagType prevCmd;

pcsx2/System/SysThreads.cpp

@@ -47,6 +47,7 @@ void SysThreadBase::Start()
 	_parent::Start();
 	m_ExecMode = ExecMode_Closing;
 	m_sem_event.Post();
+	m_StartupEvent.Wait();
 }
 
 
@@ -55,6 +56,7 @@ void SysThreadBase::OnStart()
 	if( !pxAssertDev( m_ExecMode == ExecMode_NoThreadYet, "SysSustainableThread:Start(): Invalid execution mode" ) ) return;
 
 	m_ResumeEvent.Reset();
+	m_StartupEvent.Reset();
 	FrankenMutex( m_ExecModeMutex );
 	FrankenMutex( m_RunningLock );
 
@@ -171,20 +173,13 @@ void SysThreadBase::Resume()
 
 	ScopedLock locker( m_ExecModeMutex );
 
-	// Recursion guard is needed because of the non-blocking Wait if the state
-	// is Suspending/Closing.  Processed events could recurse into Resume, and we'll
-	// want to silently ignore them.
-	
-	//RecursionGuard guard( m_resume_guard );
-	//if( guard.IsReentrant() ) return;
-
 	switch( m_ExecMode )
 	{
 		case ExecMode_Opened: return;
 
 		case ExecMode_NoThreadYet:
 			Start();
-			m_ExecMode = ExecMode_Closing;
+
 		// fall through...
 
 		case ExecMode_Closing:
@@ -192,9 +187,7 @@ void SysThreadBase::Resume()
 			// we need to make sure and wait for the emuThread to enter a fully suspended
 			// state before continuing...
 
-			//locker.Unlock();		// no deadlocks please, thanks. :)
 			m_RunningLock.Wait();
-			//locker.Lock();
 
 			// The entire state coming out of a Wait is indeterminate because of user input
 			// and pending messages being handled.  If something doesn't feel right, we should
@@ -434,7 +427,9 @@ void SysCoreThread::CpuExecute()
 void SysCoreThread::ExecuteTaskInThread()
 {
 	m_RunningLock.Lock();
+
 	tls_coreThread = this;
+	m_StartupEvent.Post();
 
 	m_sem_event.WaitRaw();
 	StateCheckInThread();

pcsx2/System/SysThreads.h

@@ -74,6 +74,11 @@ protected:
 	// Used to wake up the thread from sleeping when it's in a suspended state.
 	Semaphore				m_ResumeEvent;
 
+	// Used to signal the creating thread that the worker has entered the running state.
+	// This is necessary because until the thread has established itself, locking against
+	// m_RunningLock isn't a reliable synchronization tool.
+	Semaphore				m_StartupEvent;
+
 	// Locked whenever the thread is not in a suspended state (either closed or paused).
 	// Issue a Wait against this mutex for performing actions that require the thread
 	// to be suspended.

pcsx2/gui/AppCoreThread.cpp

@@ -66,6 +66,7 @@ void AppCoreThread::Resume()
 		evt.SetInt( CoreStatus_Suspended );
 		wxGetApp().AddPendingEvent( evt );
 
+		if( (m_ExecMode != ExecMode_Closing) || (m_ExecMode != ExecMode_Pausing) )
 			sApp.SysExecute();
 	}
 }

pcsx2/gui/MainFrame.cpp

@@ -518,6 +518,8 @@ void MainEmuFrame::ReloadRecentLists()
 
 void MainEmuFrame::ApplyCoreStatus()
 {
+	bool valstate = SysHasValidState();
+
 	GetMenuBar()->Enable( MenuId_Sys_SuspendResume, SysHasValidState() );
 	GetMenuBar()->Enable( MenuId_Sys_Reset, SysHasValidState() || (g_plugins!=NULL) );
 

pcsx2/gui/MainMenuClicks.cpp

@@ -78,7 +78,7 @@ void MainEmuFrame::Menu_BootCdvd_Click( wxCommandEvent &event )
 {
 	CoreThread.Suspend();
 
-	if( !wxFileExists( g_Conf->CurrentIso ) )
+	if( (g_Conf->CdvdSource == CDVDsrc_Iso) && !wxFileExists(g_Conf->CurrentIso) )
 	{
 		if( !_DoSelectIsoBrowser() )
 		{