Replace float/UInt64 durations by a more precise Time class (#388)

Improve Clock class with atomic RestartIfOver method and allows to choose required precision

src/Nazara/Core/Time.cpp

@@ -0,0 +1,36 @@
+// Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Core/Time.hpp>
+
+#if defined(NAZARA_PLATFORM_WINDOWS)
+	#include <Nazara/Core/Win32/TimeImpl.hpp>
+#elif defined(NAZARA_PLATFORM_MACOS) || defined(NAZARA_PLATFORM_IOS)
+	#include <Nazara/Core/Darwin/TimeImpl.hpp>
+#elif defined(NAZARA_PLATFORM_POSIX)
+	#include <Nazara/Core/Posix/TimeImpl.hpp>
+#else
+	#error OS not handled
+#endif
+
+#include <Nazara/Core/Debug.hpp>
+
+namespace Nz
+{
+	namespace NAZARA_ANONYMOUS_NAMESPACE
+	{
+		Time GetElapsedNanosecondsFirstRun()
+		{
+			if (InitializeHighPrecisionTimer())
+				GetElapsedNanoseconds = GetElapsedNanosecondsImpl;
+			else
+				GetElapsedNanoseconds = GetElapsedMillisecondsImpl;
+
+			return GetElapsedNanoseconds();
+		}
+	}
+
+	GetElapsedTimeFunction GetElapsedMilliseconds = GetElapsedMillisecondsImpl;
+	GetElapsedTimeFunction GetElapsedNanoseconds = NAZARA_ANONYMOUS_NAMESPACE_PREFIX(GetElapsedNanosecondsFirstRun);
+}