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diff --git a/lib/base/thread.h b/lib/base/thread.h
index dad8042..8ee9659 100644
--- a/lib/base/thread.h
+++ b/lib/base/thread.h
@@ -29,6 +29,11 @@ public:
 	eThread();
 	virtual ~eThread();
 
+		/* thread_finished is called from within the thread context as the last function
+		   before the thread is going to die.
+		   It should be used to do final cleanups (unlock locked mutexes ....) */
+	virtual void thread_finished() {}
+
 		/* runAsync starts the thread.
 		   it assumes that the thread is not running,
 		   i.e. sync() *must* return 0.
@@ -46,7 +51,7 @@ public:
 		/* result: 0 - thread is not alive
 		           1 - thread state unknown */
 	int sync();
-	void sendSignal(int sig);
+	int sendSignal(int sig);
 
 		/* join the thread, i.e. busywait until thread has finnished. */
 	void kill(bool sendcancel=false);
@@ -54,7 +59,7 @@ private:
 	pthread_t the_thread;
 
 	static void *wrapper(void *ptr);
-	int m_alive;
+	int m_alive, m_started;
 	static void thread_completed(void *p);
 
 	eSemaphore m_state;