sync with upstream

1 files changed, 100 insertions, 0 deletions

diff --git a/xbmc/utils/Stopwatch.h b/xbmc/utils/Stopwatch.h
new file mode 100644
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+++ b/xbmc/utils/Stopwatch.h
@@ -0,0 +1,100 @@
+/*
+ *  Copyright (C) 2005-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+class CStopWatch
+{
+public:
+  explicit CStopWatch(bool useFrameTime=false);
+  ~CStopWatch();
+
+  /*!
+    \brief Retrieve the running state of the stopwatch.
+
+    \return True if stopwatch has been started but not stopped.
+  */
+  inline bool IsRunning() const
+  {
+    return m_isRunning;
+  }
+
+  /*!
+    \brief Record start time and change state to running.
+  */
+  inline void StartZero()
+  {
+    m_startTick = GetTicks();
+    m_isRunning = true;
+  }
+
+  /*!
+    \brief Record start time and change state to running, only if the stopwatch is stopped.
+  */
+  inline void Start()
+  {
+    if (!m_isRunning)
+      StartZero();
+  }
+
+  /*!
+    \brief Record stop time and change state to not running.
+  */
+  inline void Stop()
+  {
+    if(m_isRunning)
+    {
+      m_stopTick = GetTicks();
+      m_isRunning = false;
+    }
+  }
+
+  /*!
+    \brief Set the start time such that time elapsed is now zero.
+  */
+  void Reset()
+  {
+    if (m_isRunning)
+      m_startTick = GetTicks();
+    else
+      m_startTick = m_stopTick;
+  }
+
+  /*!
+    \brief  Retrieve time elapsed between the last call to Start(), StartZero()
+            or Reset() and; if running, now; if stopped, the last call to Stop().
+
+    \return Elapsed time, in seconds, as a float.
+  */
+  float GetElapsedSeconds() const
+  {
+    int64_t totalTicks = (m_isRunning ? GetTicks() : m_stopTick) - m_startTick;
+    return (float)totalTicks * m_timerPeriod;
+  }
+
+  /*!
+    \brief  Retrieve time elapsed between the last call to Start(), StartZero()
+            or Reset() and; if running, now; if stopped, the last call to Stop().
+
+    \return Elapsed time, in milliseconds, as a float.
+  */
+  float GetElapsedMilliseconds() const
+  {
+    return GetElapsedSeconds() * 1000.0f;
+  }
+
+private:
+  int64_t GetTicks() const;
+  float m_timerPeriod;        // to save division in GetElapsed...()
+  int64_t m_startTick;
+  int64_t m_stopTick;
+  bool m_isRunning;
+  bool m_useFrameTime;
+};