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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+/* $Rev$ $Date$ */
+
+#ifndef tuscany_perf_hpp
+#define tuscany_perf_hpp
+
+/**
+ * Functions to help measure performance.
+ */
+
+#include <sys/time.h>
+#include <time.h>
+
+#include "function.hpp"
+
+namespace tuscany
+{
+
+/**
+ * Measure the time required to perform a function in msec.
+ */
+struct timeLambda {
+    const lambda<bool()> f;
+    timeLambda(const lambda<bool()>& f) : f(f) {
+    }
+    bool operator()(const long count) const {
+        for (long i = 0; i < count; i++)
+            f();
+        return true;
+    }
+};
+
+const double time(const lambda<bool()>& f, const long warmup, const long count) {
+    const lambda<bool(long)> tl = timeLambda(f);
+    struct timeval start;
+    struct timeval end;
+
+    tl(warmup);
+    gettimeofday(&start, NULL);
+    tl(count);
+    gettimeofday(&end, NULL);
+
+    const long t = (end.tv_sec * 1000 + end.tv_usec / 1000) - (start.tv_sec * 1000 + start.tv_usec / 1000);
+    return (double)t / (double)count;
+}
+
+const unsigned long timems() {
+    struct timeval t;
+    gettimeofday(&t, NULL);
+    return (unsigned long)(t.tv_sec * 1000 + t.tv_usec / 1000);
+}
+
+const unsigned long timens() {
+    struct timeval t;
+    gettimeofday(&t, NULL);
+    return (unsigned long)(t.tv_sec * 1000000000 + t.tv_usec * 1000);
+}
+
+}
+#endif /* tuscany_perf_hpp */