mirror of https://github.com/Icinga/icinga2.git
82 lines
1.6 KiB
C++
82 lines
1.6 KiB
C++
/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
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#ifndef THREADPOOL_H
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#define THREADPOOL_H
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#include "base/exception.hpp"
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#include "base/logger.hpp"
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#include <cstddef>
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#include <exception>
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#include <functional>
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#include <memory>
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#include <thread>
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#include <boost/asio/post.hpp>
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#include <boost/asio/thread_pool.hpp>
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#include <boost/thread/locks.hpp>
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#include <boost/thread/shared_mutex.hpp>
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namespace icinga
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{
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enum SchedulerPolicy
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{
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DefaultScheduler,
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LowLatencyScheduler
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};
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/**
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* A thread pool.
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*
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* @ingroup base
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*/
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class ThreadPool
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{
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public:
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typedef std::function<void ()> WorkFunction;
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ThreadPool(size_t threads = std::thread::hardware_concurrency() * 2u);
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~ThreadPool();
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void Start();
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void Stop();
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/**
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* Appends a work item to the work queue. Work items will be processed in FIFO order.
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*
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* @param callback The callback function for the work item.
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* @returns true if the item was queued, false otherwise.
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*/
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template<class T>
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bool Post(T callback, SchedulerPolicy)
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{
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boost::shared_lock<decltype(m_Mutex)> lock (m_Mutex);
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if (m_Pool) {
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boost::asio::post(*m_Pool, [callback]() {
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try {
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callback();
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} catch (const std::exception& ex) {
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Log(LogCritical, "ThreadPool")
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<< "Exception thrown in event handler:\n"
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<< DiagnosticInformation(ex);
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} catch (...) {
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Log(LogCritical, "ThreadPool", "Exception of unknown type thrown in event handler.");
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}
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});
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return true;
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} else {
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return false;
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}
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}
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private:
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boost::shared_mutex m_Mutex;
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std::unique_ptr<boost::asio::thread_pool> m_Pool;
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size_t m_Threads;
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};
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}
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#endif /* THREADPOOL_H */
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