mirror of
https://github.com/mii443/libdatachannel.git
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78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
/**
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* Copyright (c) 2020 Paul-Louis Ageneau
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "threadpool.hpp"
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namespace rtc {
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ThreadPool &ThreadPool::Instance() {
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// Init handles joining on cleanup
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static ThreadPool *instance = new ThreadPool;
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return *instance;
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}
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ThreadPool::~ThreadPool() { join(); }
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int ThreadPool::count() const {
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std::unique_lock lock(mWorkersMutex);
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return int(mWorkers.size());
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}
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void ThreadPool::spawn(int count) {
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std::unique_lock lock(mWorkersMutex);
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mJoining = false;
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while (count-- > 0)
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mWorkers.emplace_back(std::bind(&ThreadPool::run, this));
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}
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void ThreadPool::join() {
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std::unique_lock lock(mWorkersMutex);
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mJoining = true;
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mCondition.notify_all();
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for (auto &w : mWorkers)
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w.join();
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mWorkers.clear();
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}
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void ThreadPool::run() {
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while (runOne()) {
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}
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}
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bool ThreadPool::runOne() {
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if (auto task = dequeue()) {
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task();
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return true;
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}
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return false;
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}
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std::function<void()> ThreadPool::dequeue() {
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std::unique_lock lock(mMutex);
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mCondition.wait(lock, [this]() { return !mTasks.empty() || mJoining; });
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if (mTasks.empty())
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return nullptr;
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auto task = std::move(mTasks.front());
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mTasks.pop();
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return task;
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}
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} // namespace rtc
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