Milestone 5: deliver embedded RDP sessions and lifecycle hardening

third_party/FreeRDP/winpr/libwinpr/synch/test/TestSynchEvent.c

@@ -0,0 +1,94 @@
+
+#include <winpr/crt.h>
+#include <winpr/synch.h>
+
+int TestSynchEvent(int argc, char* argv[])
+{
+	HANDLE event = nullptr;
+	WINPR_UNUSED(argc);
+	WINPR_UNUSED(argv);
+	if (ResetEvent(nullptr))
+	{
+		printf("ResetEvent(nullptr) unexpectedly succeeded\n");
+		return -1;
+	}
+
+	if (SetEvent(nullptr))
+	{
+		printf("SetEvent(nullptr) unexpectedly succeeded\n");
+		return -1;
+	}
+
+	event = CreateEvent(nullptr, TRUE, TRUE, nullptr);
+
+	if (!event)
+	{
+		printf("CreateEvent failure\n");
+		return -1;
+	}
+
+	if (WaitForSingleObject(event, INFINITE) != WAIT_OBJECT_0)
+	{
+		printf("WaitForSingleObject failure 1\n");
+		return -1;
+	}
+
+	if (!ResetEvent(event))
+	{
+		printf("ResetEvent failure with signaled event object\n");
+		return -1;
+	}
+
+	if (WaitForSingleObject(event, 0) != WAIT_TIMEOUT)
+	{
+		printf("WaitForSingleObject failure 2\n");
+		return -1;
+	}
+
+	if (!ResetEvent(event))
+	{
+		/* Note: ResetEvent must also succeed if event is currently nonsignaled */
+		printf("ResetEvent failure with nonsignaled event object\n");
+		return -1;
+	}
+
+	if (!SetEvent(event))
+	{
+		printf("SetEvent failure with nonsignaled event object\n");
+		return -1;
+	}
+
+	if (WaitForSingleObject(event, 0) != WAIT_OBJECT_0)
+	{
+		printf("WaitForSingleObject failure 3\n");
+		return -1;
+	}
+
+	for (int i = 0; i < 10000; i++)
+	{
+		if (!SetEvent(event))
+		{
+			printf("SetEvent failure with signaled event object (i = %d)\n", i);
+			return -1;
+		}
+	}
+
+	if (!ResetEvent(event))
+	{
+		printf("ResetEvent failure after multiple SetEvent calls\n");
+		return -1;
+	}
+
+	/* Independent of the amount of the previous SetEvent calls, a single
+	   ResetEvent must be sufficient to get into nonsignaled state */
+
+	if (WaitForSingleObject(event, 0) != WAIT_TIMEOUT)
+	{
+		printf("WaitForSingleObject failure 4\n");
+		return -1;
+	}
+
+	(void)CloseHandle(event);
+
+	return 0;
+}