Add semaphore based signal implementation

src/os2/signal.cpp

@@ -0,0 +1,29 @@
+#include <sta/os2/signal.hpp>
+
+
+namespace sta
+{
+	Os2Signal::Os2Signal(osSemaphoreId_t * semaphore)
+		: semaphore_{semaphore}
+	{}
+
+	void Os2Signal::notify()
+	{
+		osSemaphoreRelease(*semaphore_);
+	}
+
+	bool Os2Signal::peek()
+	{
+		return (osSemaphoreGetCount(*semaphore_) != 0);
+	}
+
+	bool Os2Signal::test()
+	{
+		return (osSemaphoreAcquire(*semaphore_, 0) == osOK);
+	}
+
+	void Os2Signal::wait()
+	{
+		osSemaphoreAcquire(*semaphore_, osWaitForever);
+	}
+} // namespace sta