mirror of
https://github.com/OpenSpace/OpenSpace.git
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4952f8f977
* Make height map fallback layer work again * Add documentation to joystick button bindings * Removed grouped property headers * Add new version number constant generated by CMake * Make Joystick deadzone work properly * Change the startup date on Earth to today * Fix key modifier handling * Add debugging indices for TreeNodeDebugging * Fix script schedule for OsirisRex * Do not open Mission schedule automatically * Upload default projection texture automatically * General code cleanup * Fix check_style_guide warnings * Remove .clang-format * MacOS compile fixes * Clang analyzer fixes
96 lines
4.3 KiB
C++
96 lines
4.3 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2018 *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
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* software and associated documentation files (the "Software"), to deal in the Software *
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* without restriction, including without limitation the rights to use, copy, modify, *
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
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* permit persons to whom the Software is furnished to do so, subject to the following *
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* conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all copies *
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* or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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****************************************************************************************/
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#ifndef __OPENSPACE_MODULE_GLOBEBROWSING___LRU_THREAD_POOL___H__
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#define __OPENSPACE_MODULE_GLOBEBROWSING___LRU_THREAD_POOL___H__
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#include <modules/globebrowsing/cache/lrucache.h>
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#include <condition_variable>
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#include <functional>
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#include <mutex>
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#include <thread>
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#include <vector>
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// Implementation based on http://progsch.net/wordpress/?p=81
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namespace openspace::globebrowsing {
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template<typename KeyType> class LRUThreadPool;
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template<typename KeyType>
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class LRUThreadPoolWorker {
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public:
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LRUThreadPoolWorker(LRUThreadPool<KeyType>& pool);
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void operator()();
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private:
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LRUThreadPool<KeyType>& _pool;
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};
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/**
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* The <code>LRUThreadPool</code> will only enqueue a certain number of tasks. The most
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* recently enqueued task is the one that will be executed first. This class is templated
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* on a key type which used as an identifier to determine wheter or not a task with the
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* given key has been enqueued or not. This means that a task can be enqueued several
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* times. The user must ensure that an enqueued task with a given key should be
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* equal in outcome to a second enqueued task with the same key. This is because a second
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* enqueued task with the same key will simply be bumped and prioritised before other
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* enqueued tasks. The given task will be ignored.
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*/
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template<typename KeyType>
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class LRUThreadPool {
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public:
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LRUThreadPool(size_t numThreads, size_t queueSize);
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LRUThreadPool(const LRUThreadPool& toCopy);
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~LRUThreadPool();
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void enqueue(std::function<void()> f, KeyType key);
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bool touch(KeyType key);
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std::vector<KeyType> getQueuedTasksKeys();
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std::vector<KeyType> getUnqueuedTasksKeys();
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void clearEnqueuedTasks();
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private:
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struct DefaultHasher {
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unsigned long long operator()(const KeyType& key) const {
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return static_cast<unsigned long long>(key);
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}
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};
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friend class LRUThreadPoolWorker<KeyType>;
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std::vector<std::thread> _workers;
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cache::LRUCache<KeyType, std::function<void()>, DefaultHasher> _queuedTasks;
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std::vector<KeyType> _unqueuedTasks;
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std::mutex _queueMutex;
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std::condition_variable _condition;
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bool _stop = false;
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};
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} // namespace openspace::globebrowsing
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#include "lruthreadpool.inl"
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#endif // __OPENSPACE_MODULE_GLOBEBROWSING___LRU_THREAD_POOL___H__
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