From e80c2baea0319decdad80c3c98cc7b28a010b0f0 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <kb9vqf@pearsoncomputing.net>
Date: Wed, 8 Apr 2015 15:13:08 -0500
Subject: Remove external dcop call and associated thread Fix lockup on lock
 screen command due to signal race condition

---
 kdesktop/krootwm.cc | 72 ++++++++---------------------------------------------
 1 file changed, 10 insertions(+), 62 deletions(-)

(limited to 'kdesktop/krootwm.cc')

diff --git a/kdesktop/krootwm.cc b/kdesktop/krootwm.cc
index 756d0b5b5..d12e024ab 100644
--- a/kdesktop/krootwm.cc
+++ b/kdesktop/krootwm.cc
@@ -60,6 +60,7 @@
 #include "desktop.h"
 #include "kcustommenu.h"
 #include "kdesktopsettings.h"
+#include "lockeng.h"
 
 #include <netwm.h>
 #include <X11/X.h>
@@ -71,21 +72,11 @@ KRootWm * KRootWm::s_rootWm = 0;
 
 extern TQCString kdesktop_name, kicker_name, twin_name;
 
-KRootWm::KRootWm(KDesktop* _desktop) : TQObject(_desktop), startup(FALSE)
+KRootWm::KRootWm(SaverEngine* _saver, KDesktop* _desktop) : TQObject(_desktop), startup(FALSE)
 {
-  m_helperThread = new TQEventLoopThread;
-  m_helperThread->start();
-  m_threadHelperObject = new KRootWmThreadHelperObject;
-  m_threadHelperObject->moveToThread(m_helperThread);
-  connect(this, TQT_SIGNAL(initializeHelperThread()), m_threadHelperObject, TQT_SLOT(initializeThread()));
-  connect(this, TQT_SIGNAL(terminateHelperThread()), m_threadHelperObject, TQT_SLOT(terminateThread()));
-  connect(this, TQT_SIGNAL(asyncLock()), m_threadHelperObject, TQT_SLOT(slotLock()));
-  connect(this, TQT_SIGNAL(asyncLockAndDoNewSession()), m_threadHelperObject, TQT_SLOT(lockAndDoNewSession()));
-  connect(this, TQT_SIGNAL(asyncSlotSessionActivated(int)), m_threadHelperObject, TQT_SLOT(slotSessionActivated(int)));
-  initializeHelperThread();
-
   s_rootWm = this;
   m_actionCollection = new TDEActionCollection(_desktop, this, "KRootWm::m_actionCollection");
+  m_pSaver = _saver;
   m_pDesktop = _desktop;
   m_bDesktopEnabled = (m_pDesktop->iconView() != 0);
   customMenu1 = 0;
@@ -226,11 +217,6 @@ KRootWm::KRootWm(KDesktop* _desktop) : TQObject(_desktop), startup(FALSE)
 
 KRootWm::~KRootWm()
 {
-  terminateHelperThread();
-  m_helperThread->wait();
-  delete m_threadHelperObject;
-  delete m_helperThread;
-
   delete m_actionCollection;
   delete desktopMenu;
   delete windowListMenu;
@@ -838,7 +824,8 @@ void KRootWm::slotCascadeWindows() {
 
 
 void KRootWm::slotLock() {
-	asyncLock();
+	m_pSaver->lockScreen();
+	m_pSaver->waitForLockEngage();
 }
 
 
@@ -882,49 +869,10 @@ void KRootWm::slotPopulateSessions()
         }
 }
 
-void KRootWmThreadHelperObject::initializeThread() {
-	// Prevent kdesktop_lock signals from being handled by the wrong (non-GUI) thread
-	sigset_t set;
-	sigemptyset(&set);
-	sigaddset(&set, SIGUSR1);
-	sigaddset(&set, SIGUSR2);
-	sigaddset(&set, SIGTTIN);
-	pthread_sigmask(SIG_BLOCK, &set, NULL);
-}
-
-void KRootWmThreadHelperObject::terminateThread() {
-	TQEventLoop* eventLoop = TQApplication::eventLoop();
-	if (eventLoop) {
-		eventLoop->exit(0);
-	}
-}
-
-void KRootWmThreadHelperObject::slotLock() {
-	// Block here until lock is complete
-	// If this is not done the desktop of the locked session will be shown after VT switch until the lock fully engages!
-	// Force remote call to ensure that blocking is enforced even though this call is being made from inside the kdesktop_name application...
-	// If this is not done DCOP will translate the call into a send and the desktop of the locked session will be shown after VT switch as above
-	system("dcop kdesktop KScreensaverIface lock");
-}
-
-void KRootWmThreadHelperObject::lockAndDoNewSession() {
-	// Block here until lock is complete
-	// If this is not done the desktop of the locked session will be shown after VT switch until the lock fully engages!
-	// Force remote call to ensure that blocking is enforced even though this call is being made from inside the kdesktop_name application...
-	// If this is not done DCOP will translate the call into a send and the desktop of the locked session will be shown after VT switch as above
-	if (system("dcop kdesktop KScreensaverIface lock") == 0) {
-		DM().startReserve();
-	}
-}
-
-void KRootWmThreadHelperObject::slotSessionActivated(int vt) {
-	DM().lockSwitchVT( vt );
-}
-
 void KRootWm::slotSessionActivated( int ent )
 {
     if (ent > 0 && !sessionsMenu->isItemChecked( ent )) {
-        asyncSlotSessionActivated( ent );
+        DM().lockSwitchVT( ent );
     }
 }
 
@@ -962,11 +910,11 @@ void KRootWm::doNewSession( bool lock )
         return;
 
     if (lock) {
-        asyncLockAndDoNewSession();
-    }
-    else {
-        DM().startReserve();
+        m_pSaver->lockScreen();
+        m_pSaver->waitForLockEngage();
     }
+
+    DM().startReserve();
 }
 
 void KRootWm::slotMenuItemActivated(int /* item */ )
-- 
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