Self tests (#3242)

* SelfTests: Added a cEvent stress-test.

* cNetwork: Fixed startup event hang.

The original code used to hang with a ~ 1:50000 chance, because on Linux the cEvent was destroyed before its "Set()" returned.

tests/OSSupport/StressEvent.cpp

@@ -0,0 +1,60 @@
+
+// StressEvent.cpp
+
+// Stress-tests the cEvent implementation
+
+#include "Globals.h"
+#include <thread>
+
+
+
+
+
+/** Number of repetitions of the thread loops. */
+const int NUM_REPETITIONS = 5000;
+
+
+
+
+// Forward declarations are needed for clang
+void runThread(cEvent * a_Event1, cEvent * a_Event2, const char * a_ThreadName);
+
+
+
+
+
+/** Function that runs in a separate thread, notifies event1 and waits for event2, in a loop, NUM_REPETITIONS times.
+This basically simulates a producer / consumer pattern with 2 events, one for "queue empty", the other for "queue full". */
+void runThread(cEvent * a_Event1, cEvent * a_Event2, const char * a_ThreadName)
+{
+	LOG("Thread %s started", a_ThreadName);
+	for (int i = 0; i < NUM_REPETITIONS; ++i)
+	{
+		// LOGD("%s: Waiting for event %p (%d)", a_ThreadName, a_Event2, i);
+		a_Event2->Wait();
+		// LOGD("%s: Setting event %p (%d)", a_ThreadName, a_Event1, i);
+		a_Event1->SetAll();
+	}
+	LOG("Thread %s finished", a_ThreadName);
+}
+
+
+
+
+
+int main()
+{
+	LOG("Test started");
+	cEvent event1, event2;
+	event1.Set();
+	std::thread thread1(&runThread, &event1, &event2, "A");
+	std::thread thread2(&runThread, &event2, &event1, "B");
+	thread1.join();
+	thread2.join();
+	LOG("Test finished");
+	return 0;
+}
+
+
+
+