From 67a3a8f34892a6491ba0073a3f583503b44e58e7 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Mon, 23 Apr 2012 14:59:01 -0500 Subject: Fix desktop lock failure due to race condition within signal handler between qt and xcb --- kdesktop/lockeng.cc | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'kdesktop/lockeng.cc') diff --git a/kdesktop/lockeng.cc b/kdesktop/lockeng.cc index 9eb88e1d1..f24d02f9f 100644 --- a/kdesktop/lockeng.cc +++ b/kdesktop/lockeng.cc @@ -34,7 +34,7 @@ SaverEngine* m_masterSaverEngine = NULL; static void sigusr1_handler(int) { if (m_masterSaverEngine) { - m_masterSaverEngine->lockProcessWaiting(); + m_masterSaverEngine->slotLockProcessWaiting(); } } @@ -445,6 +445,13 @@ void SaverEngine::lockProcessExited() } } +void SaverEngine::slotLockProcessWaiting() +{ + // lockProcessWaiting cannot be called directly from a signal handler, as it will hang in certain obscure circumstances + // Instead we use a single-shot timer to immediately call lockProcessWaiting once control has returned to the Qt main loop + TQTimer::singleShot(0, this, SLOT(lockProcessWaiting())); +} + void SaverEngine::lockProcessWaiting() { kdDebug(1204) << "SaverEngine: lock exited" << endl; -- cgit v1.2.1