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Diffstat (limited to 'include/distortos/internal/scheduler/ThreadListNode.hpp')
-rw-r--r-- | include/distortos/internal/scheduler/ThreadListNode.hpp | 86 |
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 index 0000000..fcd7c85 --- /dev/null +++ b/include/distortos/internal/scheduler/ThreadListNode.hpp @@ -0,0 +1,86 @@ +/** + * \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_ |