From 92235fb259b0ebdfc99859c2c95fe1f8c163f411 Mon Sep 17 00:00:00 2001
From: Clyne Sullivan <tullivan99@gmail.com>
Date: Tue, 8 Nov 2016 20:09:05 -0500
Subject: trying out distortos

---
 .../synchronization/SwapPopQueueFunctor.hpp        | 74 ++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 include/distortos/internal/synchronization/SwapPopQueueFunctor.hpp

(limited to 'include/distortos/internal/synchronization/SwapPopQueueFunctor.hpp')

diff --git a/include/distortos/internal/synchronization/SwapPopQueueFunctor.hpp b/include/distortos/internal/synchronization/SwapPopQueueFunctor.hpp
new file mode 100644
index 0000000..1009f3c
--- /dev/null
+++ b/include/distortos/internal/synchronization/SwapPopQueueFunctor.hpp
@@ -0,0 +1,74 @@
+/**
+ * \file
+ * \brief SwapPopQueueFunctor class header
+ *
+ * \author Copyright (C) 2015 Kamil Szczygiel http://www.distortec.com http://www.freddiechopin.info
+ *
+ * \par License
+ * This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not
+ * distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef INCLUDE_DISTORTOS_INTERNAL_SYNCHRONIZATION_SWAPPOPQUEUEFUNCTOR_HPP_
+#define INCLUDE_DISTORTOS_INTERNAL_SYNCHRONIZATION_SWAPPOPQUEUEFUNCTOR_HPP_
+
+#include "distortos/internal/synchronization/QueueFunctor.hpp"
+
+#include <utility>
+
+namespace distortos
+{
+
+namespace internal
+{
+
+/**
+ * SwapPopQueueFunctor is a functor used for popping of data from the queue using swap
+ *
+ * \tparam T is the type of data popped from the queue
+ */
+
+template<typename T>
+class SwapPopQueueFunctor : public QueueFunctor
+{
+public:
+
+	/**
+	 * \brief SwapPopQueueFunctor's constructor
+	 *
+	 * \param [out] value is a reference to object that will be used to return popped value, its contents are swapped
+	 * with the value in the queue's storage and destructed when no longer needed
+	 */
+
+	constexpr explicit SwapPopQueueFunctor(T& value) :
+			value_{value}
+	{
+
+	}
+
+	/**
+	 * \brief Swaps the element in the queue's storage with the value provided by user and destroys this value when no
+	 * longer needed.
+	 *
+	 * \param [in,out] storage is a pointer to storage with element
+	 */
+
+	void operator()(void* const storage) const override
+	{
+		auto& swappedValue = *reinterpret_cast<T*>(storage);
+		using std::swap;
+		swap(value_, swappedValue);
+		swappedValue.~T();
+	}
+
+private:
+
+	/// reference to object that will be used to return popped value
+	T& value_;
+};
+
+}	// namespace internal
+
+}	// namespace distortos
+
+#endif	// INCLUDE_DISTORTOS_INTERNAL_SYNCHRONIZATION_SWAPPOPQUEUEFUNCTOR_HPP_
-- 
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