base: Local signal submit

base/include/base/signal.h

@@ -170,6 +170,16 @@ namespace Genode {
 			 */
 			virtual ~Signal_context() { }
 
+			/**
+			 * Local sginal submission (DEPRECATED)
+			 *
+			 * Trigger local signal submission (within the same address space), the
+			 * context has to be bound to a sginal receiver beforehand.
+			 *
+			 * \param num  number of pending signals
+			 */
+			void submit(unsigned num);
+
 			/*
 			 * Signal contexts are never invoked but only used as arguments for
 			 * 'Signal_session' functions. Hence, there exists a capability
@@ -343,7 +353,7 @@ namespace Genode {
 	 * \param T  type of signal-handling class
 	 */
 	template <typename T>
-	class Signal_dispatcher : private Signal_dispatcher_base,
+	class Signal_dispatcher : public Signal_dispatcher_base,
 	                          public  Signal_context_capability
 	{
 		private:

base/src/base/signal/signal.cc

@@ -199,6 +199,31 @@ Signal::Signal(Signal::Data data) : _data(data)
 }
 
 
+/********************
+ ** Signal context **
+ ********************/
+
+void Signal_context::submit(unsigned num)
+{
+	if (!_receiver) {
+		PWRN("signal context with no receiver");
+		return;
+	}
+
+	if (!signal_context_registry()->test_and_lock(this)) {
+		PWRN("encountered dead signal context");
+		return;
+	}
+
+	/* construct and locally submit signal object */
+	Signal::Data signal(this, num);
+	_receiver->local_submit(signal);
+
+	/* free context lock that was taken by 'test_and_lock' */
+	_lock.unlock();
+}
+
+
 /************************
  ** Signal transmitter **
  ************************/