Added simple benchmark of mutex performance.

Foundation/samples/Benchmark/CMakeLists.txt

@@ -0,0 +1,7 @@
+set(SAMPLE_NAME "MutexBenchmark")
+
+set(LOCAL_SRCS "")
+aux_source_directory(src LOCAL_SRCS)
+
+add_executable( ${SAMPLE_NAME} ${LOCAL_SRCS} )
+target_link_libraries( ${SAMPLE_NAME} PocoFoundation )

Foundation/samples/Benchmark/src/Benchmark.cpp

@@ -0,0 +1,72 @@
+//
+// Benchmark.cpp
+//
+// $Id$
+//
+// This sample shows a benchmark of various mutex implementations.
+//
+// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#include "Poco/Mutex.h"
+#include "Poco/Stopwatch.h"
+#include <iostream>
+#include <iomanip>
+
+template<typename Mtx>
+void Benchmark(Mtx& mtx, std::string const& label)
+{
+	Poco::Stopwatch sw;
+	sw.start();
+
+	const int LOOP_COUNT = 100000000;
+	for (int i = 0 ; i < LOOP_COUNT ; ++i)
+	{
+		mtx.lock();
+		mtx.unlock();
+	}
+
+	mtx.lock();
+
+	for (int i = 0 ; i < LOOP_COUNT ; ++i)
+	{
+		mtx.unlock();
+		mtx.lock();
+	}
+
+	mtx.unlock();
+
+	sw.stop();
+
+	std::cout << label << ' ' << sw.elapsed() << " [us]" << std::endl;
+}
+
+
+int main(int argc, char** argv)
+{
+	{
+		Poco::NullMutex mtx;
+		Benchmark(mtx, "NullMutex");
+	}
+
+	{
+		Poco::Mutex mtx(true);
+		Benchmark(mtx, "Mutex(true)");
+	}
+
+	{
+		Poco::Mutex mtx(false);
+		Benchmark(mtx, "Mutex(false)");
+	}
+
+	{
+		Poco::FastMutex mtx;
+		Benchmark(mtx, "FastMutex");
+	}
+
+	return 0;
+}

Foundation/samples/CMakeLists.txt

@@ -1,5 +1,6 @@
 add_subdirectory(ActiveMethod)
 add_subdirectory(Activity)
+add_subdirectory(Benchmark)
 add_subdirectory(BinaryReaderWriter)
 add_subdirectory(DateTime)
 add_subdirectory(LogRotation)