trying out distortos

1 files changed, 86 insertions, 0 deletions

diff --git a/include/distortos/internal/scheduler/ThreadListNode.hpp b/include/distortos/internal/scheduler/ThreadListNode.hpp
new file mode 100644
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+++ b/include/distortos/internal/scheduler/ThreadListNode.hpp
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+/**
+ * \file
+ * \brief ThreadListNode 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_SCHEDULER_THREADLISTNODE_HPP_
+#define INCLUDE_DISTORTOS_INTERNAL_SCHEDULER_THREADLISTNODE_HPP_
+
+#include "estd/IntrusiveList.hpp"
+
+namespace distortos
+{
+
+namespace internal
+{
+
+/**
+ * \brief ThreadListNode class is a base for ThreadControlBlock that provides nodes for intrusive lists
+ *
+ * This class is needed to break circular dependency - MutexList is contained in ThreadControlBlock and ThreadList is
+ * contained in MutexControlBlock.
+ */
+
+class ThreadListNode
+{
+public:
+
+	/**
+	 * \brief ThreadListNode's constructor
+	 *
+	 * \param [in] priority is the thread's priority, 0 - lowest, UINT8_MAX - highest
+	 */
+
+	constexpr ThreadListNode(const uint8_t priority) :
+			threadListNode{},
+			threadGroupNode{},
+			priority_{priority},
+			boostedPriority_{}
+	{
+
+	}
+
+	/**
+	 * \return effective priority of thread
+	 */
+
+	uint8_t getEffectivePriority() const
+	{
+		return std::max(priority_, boostedPriority_);
+	}
+
+	/**
+	 * \return priority of thread
+	 */
+
+	uint8_t getPriority() const
+	{
+		return priority_;
+	}
+
+	/// node for intrusive list in thread lists
+	estd::IntrusiveListNode threadListNode;
+
+	/// node for intrusive list in thread group
+	estd::IntrusiveListNode threadGroupNode;
+
+protected:
+
+	/// thread's priority, 0 - lowest, UINT8_MAX - highest
+	uint8_t priority_;
+
+	/// thread's boosted priority, 0 - no boosting
+	uint8_t boostedPriority_;
+};
+
+}	// namespace internal
+
+}	// namespace distortos
+
+#endif	// INCLUDE_DISTORTOS_INTERNAL_SCHEDULER_THREADLISTNODE_HPP_