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139 lines
3.9 KiB
C++
139 lines
3.9 KiB
C++
/*
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* Copyright 2013-2020 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsLTE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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/******************************************************************************
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* File: thread_pool.h
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* Description: Implements a pool of threads. Pending tasks to execute are
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* identified by a pointer.
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* Reference:
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*****************************************************************************/
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#ifndef SRSLTE_THREAD_POOL_H
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#define SRSLTE_THREAD_POOL_H
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#include <condition_variable>
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#include <functional>
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#include <memory>
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#include <mutex>
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#include <queue>
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#include <stack>
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#include <stdint.h>
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#include <string>
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#include <vector>
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#include "srslte/common/threads.h"
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namespace srslte {
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class thread_pool
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{
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public:
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class worker : public thread
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{
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public:
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worker();
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void setup(uint32_t id, thread_pool* parent, uint32_t prio = 0, uint32_t mask = 255);
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uint32_t get_id();
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void release();
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protected:
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virtual void work_imp() = 0;
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private:
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uint32_t my_id = 0;
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thread_pool* my_parent = nullptr;
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void run_thread();
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void wait_to_start();
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void finished();
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};
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thread_pool(uint32_t nof_workers);
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void init_worker(uint32_t id, worker*, uint32_t prio = 0, uint32_t mask = 255);
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void stop();
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worker* wait_worker_id(uint32_t id);
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worker* wait_worker(uint32_t tti);
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worker* wait_worker_nb(uint32_t tti);
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void start_worker(worker*);
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void start_worker(uint32_t id);
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worker* get_worker(uint32_t id);
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uint32_t get_nof_workers();
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private:
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bool find_finished_worker(uint32_t tti, uint32_t* id);
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typedef enum { STOP, IDLE, START_WORK, WORKER_READY, WORKING } worker_status;
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std::vector<worker*> workers = {};
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uint32_t nof_workers = 0;
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uint32_t max_workers = 0;
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bool running = false;
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std::condition_variable cvar_queue = {};
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std::mutex mutex_queue = {};
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std::vector<worker_status> status = {};
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std::vector<std::condition_variable> cvar_worker = {};
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};
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class task_thread_pool
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{
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using task_t = std::function<void(uint32_t worker_id)>;
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public:
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explicit task_thread_pool(uint32_t nof_workers);
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~task_thread_pool();
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void start(int32_t prio = -1, uint32_t mask = 255);
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void stop();
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void push_task(const task_t& task);
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void push_task(task_t&& task);
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uint32_t nof_pending_tasks();
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private:
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class worker_t : public thread
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{
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public:
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explicit worker_t(task_thread_pool* parent_, uint32_t id);
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void stop();
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void setup(int32_t prio, uint32_t mask);
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bool is_running() const { return running; }
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uint32_t id() const { return id_; }
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void run_thread() override;
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private:
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bool wait_task(task_t* task);
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task_thread_pool* parent = nullptr;
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uint32_t id_ = 0;
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bool running = false;
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};
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std::queue<task_t> pending_tasks;
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std::vector<worker_t> workers;
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std::mutex queue_mutex;
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std::condition_variable cv_empty;
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bool running;
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};
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} // namespace srslte
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#endif // SRSLTE_THREAD_POOL_H
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