added iOS source code

[wl-app.git] / iOS / Pods / Realm / include / core / realm / metrics / metric_timer.hpp

diff --git a/iOS/Pods/Realm/include/core/realm/metrics/metric_timer.hpp b/iOS/Pods/Realm/include/core/realm/metrics/metric_timer.hpp
new file mode 100644 (file)
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+++ b/iOS/Pods/Realm/include/core/realm/metrics/metric_timer.hpp
@@ -0,0 +1,103 @@
+/*************************************************************************
+ *
+ * Copyright 2016 Realm Inc.
+ *
+ * Licensed 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.
+ *
+ **************************************************************************/
+
+#ifndef REALM_METRIC_TIMER_HPP
+#define REALM_METRIC_TIMER_HPP
+
+#include <realm/util/features.h>
+
+#include <chrono>
+#include <memory>
+#include <ostream>
+
+#if REALM_METRICS
+
+namespace realm {
+namespace metrics {
+
+
+class MetricTimerResult
+{
+public:
+    MetricTimerResult();
+    ~MetricTimerResult();
+    double get_elapsed_seconds() const;
+    virtual void report_seconds(double time);
+protected:
+    double m_elapsed_seconds;
+};
+
+
+class MetricTimer {
+public:
+    MetricTimer(std::shared_ptr<MetricTimerResult> destination = nullptr);
+    ~MetricTimer();
+
+    void reset();
+
+    /// Returns elapsed time in seconds since last call to reset().
+    double get_elapsed_time() const;
+    /// Same as get_elapsed_time().
+    operator double() const;
+
+    /// Format the elapsed time on the form 0h00m, 00m00s, 00.00s, or
+    /// 000.0ms depending on magnitude.
+    static void format(double seconds, std::ostream&);
+
+    static std::string format(double seconds);
+
+private:
+    using clock_type = std::chrono::high_resolution_clock;
+    using time_point = std::chrono::time_point<clock_type>;
+    time_point m_start;
+    time_point m_paused_at;
+    std::shared_ptr<MetricTimerResult> m_dest;
+
+    time_point get_timer_ticks() const;
+    double calc_elapsed_seconds(time_point begin, time_point end) const;
+};
+
+
+inline void MetricTimer::reset()
+{
+    m_start = get_timer_ticks();
+}
+
+inline double MetricTimer::get_elapsed_time() const
+{
+    return calc_elapsed_seconds(m_start, get_timer_ticks());
+}
+
+inline MetricTimer::operator double() const
+{
+    return get_elapsed_time();
+}
+
+inline std::ostream& operator<<(std::ostream& out, const MetricTimer& timer)
+{
+    MetricTimer::format(timer, out);
+    return out;
+}
+
+
+} // namespace metrics
+} // namespace realm
+
+#endif // REALM_METRICS
+
+#endif // REALM_METRIC_TIMER_HPP