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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.
+ */
+
+/**
+ * \file ScopedTimer.h
+ */
+
+#ifndef tests_storePerfTools_common_ScopedTimer_h_
+#define tests_storePerfTools_common_ScopedTimer_h_
+
+#include <ctime>
+
+namespace tests {
+namespace storePerftools {
+namespace common {
+
+class ScopedTimable;
+
+/**
+ * \brief Scoped timer class that starts timing on construction and finishes on destruction.
+ *
+ * The scoped timer will take the current time on construction and again on destruction. The destructor
+ * will calculate the elapsed time from the difference between these two times and write the result
+ * as a double to the double ref supplied to the constructor. A second constructor will accept a class (or
+ * subclass) of ScopedTimable, which contains a double to which the result may be written and accessed at a
+ * later time.
+ */
+class ScopedTimer
+{
+public:
+ /**
+ * \brief Constructor
+ *
+ * Constructor which accepts a ref to a double. Will start the time interval measurement.
+ *
+ * \param elapsed A ref to a double which will contain the elapsed time in seconds after this class instance
+ * is destroyed.
+ */
+ ScopedTimer(double& elapsed);
+
+ /**
+ * \brief Constructor
+ *
+ * Constructor which accepts a ref to a ScopedTimable. Will start the time interval measurement.
+ *
+ * \param st A ref to a ScopedTimable into which the result of the ScopedTimer can be written.
+ */
+ ScopedTimer(ScopedTimable& st);
+
+ /**
+ * \brief Destructor
+ *
+ * Destructor. Will stop the time interval measurement and write the calculated elapsed time into _elapsed.
+ */
+ virtual ~ScopedTimer();
+
+protected:
+ double& m_elapsed; ///< Ref to elapsed time, will be written on destruction of ScopedTimer instances
+ ::timespec m_startTime; ///< Start time, set on construction
+
+ /**
+ * \brief Convert ::timespec to seconds
+ *
+ * Static function to convert a ::timespec struct into a double representation in seconds.
+ *
+ * \param ts std::timespec struct containing the time to be converted.
+ * \return A double which represents the time in parameter ts in seconds.
+ */
+ static double _s_getDoubleTime(const ::timespec& ts);
+
+};
+
+}}} // namespace tests::storePerftools::common
+
+#endif // tests_storePerfTools_common_ScopedTimer_h_