mirror of https://github.com/Icinga/icinga2.git
138 lines
3.6 KiB
C++
138 lines
3.6 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program 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 General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#include "i2-base.h"
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using namespace icinga;
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/**
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* @threadsafety Always.
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*/
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EventQueue::EventQueue(void)
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: m_Stopped(false), m_LastReport(0)
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{
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int thread_count = thread::hardware_concurrency();
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if (thread_count < 4)
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thread_count = 4;
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for (int i = 0; i < thread_count; i++)
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m_Threads.create_thread(boost::bind(&EventQueue::QueueThreadProc, this));
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m_ReportTimer = boost::make_shared<Timer>();
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m_ReportTimer->OnTimerExpired.connect(boost::bind(&EventQueue::ReportTimerHandler, this));
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m_ReportTimer->SetInterval(5);
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m_ReportTimer->Start();
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}
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/**
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* @threadsafety Always.
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*/
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EventQueue::~EventQueue(void)
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{
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m_ReportTimer->Stop();
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Stop();
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Join();
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}
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/**
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* @threadsafety Always.
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*/
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void EventQueue::Stop(void)
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{
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boost::mutex::scoped_lock lock(m_Mutex);
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m_Stopped = true;
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m_CV.notify_all();
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}
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/**
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* Waits for all worker threads to finish.
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*
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* @threadsafety Always.
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*/
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void EventQueue::Join(void)
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{
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m_Threads.join_all();
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}
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/**
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* Waits for events and processes them.
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*
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* @threadsafety Always.
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*/
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void EventQueue::QueueThreadProc(void)
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{
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for (;;) {
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vector<Callback> events;
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{
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boost::mutex::scoped_lock lock(m_Mutex);
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while (m_Events.empty() && !m_Stopped)
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m_CV.wait(lock);
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if (m_Events.empty() && m_Stopped)
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break;
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events.swap(m_Events);
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}
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BOOST_FOREACH(const Callback& ev, events) {
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double st = Utility::GetTime();
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ev();
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double et = Utility::GetTime();
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if (et - st > 0.25) {
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stringstream msgbuf;
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msgbuf << "Event call took " << et - st << " seconds.";
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Logger::Write(LogWarning, "base", msgbuf.str());
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}
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}
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}
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}
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/**
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* Appends an event to the event queue. Events will be processed in FIFO order.
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*
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* @param callback The callback function for the event.
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* @threadsafety Always.
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*/
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void EventQueue::Post(const EventQueue::Callback& callback)
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{
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boost::mutex::scoped_lock lock(m_Mutex);
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m_Events.push_back(callback);
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m_CV.notify_one();
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}
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void EventQueue::ReportTimerHandler(void)
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{
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int pending;
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{
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boost::mutex::scoped_lock lock(m_Mutex);
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pending = m_Events.size();
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}
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if (pending > 1000)
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Logger::Write(LogCritical, "base", "More than 1000 pending events: " + Convert::ToString(pending));
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}
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