Async: add AsyncLoop bounds tracker

include/asynchronousLoop.h

@@ -0,0 +1,30 @@
+#ifndef ASYNCHRONOUS_LOOP_H
+#define ASYNCHRONOUS_LOOP_H
+
+#include <atomic>
+
+namespace smo {
+
+class AsynchronousLoop
+{
+public:
+	AsynchronousLoop(
+		unsigned int nTotal, unsigned int nSucceeded=0, unsigned int nFailed=0)
+	: nTotal(nTotal), nSucceeded(nSucceeded), nFailed(nFailed)
+	{
+	}
+
+	~AsynchronousLoop(void);
+
+	bool isComplete(void) const
+	{
+		return nSucceeded + nFailed == nTotal;
+	}
+
+public:
+	std::atomic<unsigned int> nTotal, nSucceeded, nFailed;
+};
+
+} // namespace smo
+
+#endif