initial commit, 4.5 stable

thirdparty/jolt_physics/Jolt/Core/ScopeExit.h

@@ -0,0 +1,49 @@
+// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
+// SPDX-FileCopyrightText: 2024 Jorrit Rouwe
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+#include <Jolt/Core/NonCopyable.h>
+
+JPH_NAMESPACE_BEGIN
+
+/// Class that calls a function when it goes out of scope
+template <class F>
+class ScopeExit : public NonCopyable
+{
+public:
+	/// Constructor specifies the exit function
+	JPH_INLINE explicit	ScopeExit(F &&inFunction) : mFunction(std::move(inFunction)) { }
+
+	/// Destructor calls the exit function
+	JPH_INLINE			~ScopeExit() { if (!mInvoked) mFunction(); }
+
+	/// Call the exit function now instead of when going out of scope
+	JPH_INLINE void		Invoke()
+	{
+		if (!mInvoked)
+		{
+			mFunction();
+			mInvoked = true;
+		}
+	}
+
+	/// No longer call the exit function when going out of scope
+	JPH_INLINE void		Release()
+	{
+		mInvoked = true;
+	}
+
+private:
+	F					mFunction;
+	bool				mInvoked = false;
+};
+
+#define JPH_SCOPE_EXIT_TAG2(line)			scope_exit##line
+#define JPH_SCOPE_EXIT_TAG(line)			JPH_SCOPE_EXIT_TAG2(line)
+
+/// Usage: JPH_SCOPE_EXIT([]{ code to call on scope exit });
+#define JPH_SCOPE_EXIT(...) ScopeExit JPH_SCOPE_EXIT_TAG(__LINE__)(__VA_ARGS__)
+
+JPH_NAMESPACE_END