1 files changed, 96 insertions, 0 deletions
diff --git a/xbmc/threads/SystemClock.h b/xbmc/threads/SystemClock.h
new file mode 100644
index 0000000..92c4901
--- /dev/null
+++ b/xbmc/threads/SystemClock.h
@@ -0,0 +1,96 @@
+/*
+ *  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 "utils/log.h"
+
+#include <chrono>
+#include <limits>
+#include <thread>
+
+namespace XbmcThreads
+{
+
+template<typename>
+struct is_chrono_duration : std::false_type
+{
+};
+
+template<typename Rep, typename Period>
+struct is_chrono_duration<std::chrono::duration<Rep, Period>> : std::true_type
+{
+};
+
+template<typename T = std::chrono::milliseconds, bool = is_chrono_duration<T>::value>
+class EndTime;
+
+template<typename T>
+class EndTime<T, true>
+{
+public:
+  explicit EndTime(const T duration) { Set(duration); }
+
+  EndTime() = default;
+  EndTime(const EndTime& right) = delete;
+  ~EndTime() = default;
+
+  static constexpr T Max() { return m_max; }
+
+  void Set(const T duration)
+  {
+    m_startTime = std::chrono::steady_clock::now();
+
+    if (duration > m_max)
+    {
+      m_totalWaitTime = m_max;
+      CLog::Log(LOGWARNING, "duration ({}) greater than max ({}) - duration will be truncated!",
+                duration.count(), m_max.count());
+    }
+    else
+    {
+      m_totalWaitTime = duration;
+    }
+  }
+
+  bool IsTimePast() const
+  {
+    const auto now = std::chrono::steady_clock::now();
+
+    return ((now - m_startTime) >= m_totalWaitTime);
+  }
+
+  T GetTimeLeft() const
+  {
+    const auto now = std::chrono::steady_clock::now();
+
+    const auto left = ((m_startTime + m_totalWaitTime) - now);
+
+    if (left < T::zero())
+      return T::zero();
+
+    return std::chrono::duration_cast<T>(left);
+  }
+
+  void SetExpired() { m_totalWaitTime = T::zero(); }
+
+  void SetInfinite() { m_totalWaitTime = m_max; }
+
+  T GetInitialTimeoutValue() const { return m_totalWaitTime; }
+
+  std::chrono::steady_clock::time_point GetStartTime() const { return m_startTime; }
+
+private:
+  std::chrono::steady_clock::time_point m_startTime;
+  T m_totalWaitTime = T::zero();
+
+  static constexpr T m_max =
+      std::chrono::duration_cast<T>(std::chrono::steady_clock::duration::max());
+};
+
+} // namespace XbmcThreads