scoped_executor: add

Signed-off-by: Simon Rozman <simon@rozman.si>

UnitTests/pch.hpp

@@ -20,6 +20,7 @@
 #include <stdex/pool.hpp>
 #include <stdex/progress.hpp>
 #include <stdex/ring.hpp>
+#include <stdex/scoped_executor.hpp>
 #include <stdex/sgml.hpp>
 #include <stdex/socket.hpp>
 #include <stdex/spinlock.hpp>

include/stdex/scoped_executor.hpp

@@ -0,0 +1,43 @@
+/*
+	SPDX-License-Identifier: MIT
+	Copyright © 2023-2024 Amebis
+*/
+
+#pragma once
+
+#include "compat.hpp"
+
+namespace stdex
+{
+	///
+	/// Executes one lambda immediately, and another when exiting the scope
+	///
+	/// \typeparam F_init  Lambda to execute immediately
+	/// \typeparam F_done  Lambda to execute when exiting the scope
+	///
+	template <typename F_init, typename F_done>
+	class scoped_executor
+	{
+		F_done&& m_done;
+
+	public:
+		///
+		/// Executes init immediately and saves done for destructor
+		///
+		/// \param[in] init  Lambda to execute immediately
+		/// \param[in] done  Lambda to execute in destructor
+		///
+		scoped_executor(_In_ F_init&& init, _In_ F_done&& done) : m_done(std::forward<F_done&&>(done))
+		{
+			std::forward<F_init&&>(init)();
+		}
+
+		///
+		/// Executes done lambda
+		///
+		~scoped_executor()
+		{
+			std::forward<F_done&&>(m_done)();
+		}
+	};
+}