Ajout de la bibli SFML (A)

code/SFML-2.4.2/include/SFML/System/Clock.hpp

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+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2007-2017 Laurent Gomila (laurent@sfml-dev.org)
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+#ifndef SFML_CLOCK_HPP
+#define SFML_CLOCK_HPP
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/System/Export.hpp>
+#include <SFML/System/Time.hpp>
+
+
+namespace sf
+{
+////////////////////////////////////////////////////////////
+/// \brief Utility class that measures the elapsed time
+///
+////////////////////////////////////////////////////////////
+class SFML_SYSTEM_API Clock
+{
+public:
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Default constructor
+    ///
+    /// The clock starts automatically after being constructed.
+    ///
+    ////////////////////////////////////////////////////////////
+    Clock();
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the elapsed time
+    ///
+    /// This function returns the time elapsed since the last call
+    /// to restart() (or the construction of the instance if restart()
+    /// has not been called).
+    ///
+    /// \return Time elapsed
+    ///
+    ////////////////////////////////////////////////////////////
+    Time getElapsedTime() const;
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Restart the clock
+    ///
+    /// This function puts the time counter back to zero.
+    /// It also returns the time elapsed since the clock was started.
+    ///
+    /// \return Time elapsed
+    ///
+    ////////////////////////////////////////////////////////////
+    Time restart();
+
+private:
+
+    ////////////////////////////////////////////////////////////
+    // Member data
+    ////////////////////////////////////////////////////////////
+    Time m_startTime; ///< Time of last reset, in microseconds
+};
+
+} // namespace sf
+
+
+#endif // SFML_CLOCK_HPP
+
+
+////////////////////////////////////////////////////////////
+/// \class sf::Clock
+/// \ingroup system
+///
+/// sf::Clock is a lightweight class for measuring time.
+///
+/// Its provides the most precise time that the underlying
+/// OS can achieve (generally microseconds or nanoseconds).
+/// It also ensures monotonicity, which means that the returned
+/// time can never go backward, even if the system time is
+/// changed.
+///
+/// Usage example:
+/// \code
+/// sf::Clock clock;
+/// ...
+/// Time time1 = clock.getElapsedTime();
+/// ...
+/// Time time2 = clock.restart();
+/// \endcode
+///
+/// The sf::Time value returned by the clock can then be
+/// converted to a number of seconds, milliseconds or even
+/// microseconds.
+///
+/// \see sf::Time
+///
+////////////////////////////////////////////////////////////