Files
nzbget/daemon/util/Service.cpp
Andrey Prygunkov e91f37d566 #351: protect vars depended on condition
to avoid race conditions and lock ups
2019-01-22 00:11:13 +01:00

117 lines
2.8 KiB
C++

/*
* This file is part of nzbget. See <http://nzbget.net>.
*
* Copyright (C) 2015-2019 Andrey Prygunkov <hugbug@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "nzbget.h"
#include "Service.h"
#include "DownloadInfo.h"
#include "Options.h"
#include "Log.h"
#include "Util.h"
Service::Service()
{
g_ServiceCoordinator->RegisterService(this);
}
void Service::WakeUp()
{
g_ServiceCoordinator->WakeUp();
};
ServiceCoordinator::ServiceCoordinator()
{
debug("Creating ServiceCoordinator");
}
ServiceCoordinator::~ServiceCoordinator()
{
debug("Destroying ServiceCoordinator");
}
void ServiceCoordinator::Run()
{
debug("Entering ServiceCoordinator-loop");
while (!IsStopped())
{
// perform service work
for (Service* service : m_services)
{
int serviceInterval = service->ServiceInterval();
if (serviceInterval >= Service::Now &&
abs(Util::CurrentTime() - service->m_lastWork) >= serviceInterval)
{
service->ServiceWork();
service->m_lastWork = Util::CurrentTime();
}
}
// calculate wait interval
int waitInterval = 60 * 60 * 24; // something very large
time_t curTime = Util::CurrentTime();
for (Service* service : m_services)
{
int serviceInterval = service->ServiceInterval();
int remaining = Service::Sleep;
if (serviceInterval >= Service::Now)
{
remaining = serviceInterval - (curTime - service->m_lastWork);
waitInterval = std::min(waitInterval, remaining);
}
debug("serviceInterval: %i, remaining: %i", serviceInterval, remaining);
}
debug("Waiting in ServiceCoordinator: %i", waitInterval);
if (waitInterval > 0)
{
Guard guard(m_waitMutex);
m_waitCond.WaitFor(m_waitMutex, waitInterval * 1000, [&] { return m_workenUp || IsStopped(); });
m_workenUp = false;
}
}
debug("Exiting ServiceCoordinator-loop");
}
void ServiceCoordinator::Stop()
{
Thread::Stop();
// Resume Run() to exit it
Guard guard(m_waitMutex);
m_waitCond.NotifyAll();
}
void ServiceCoordinator::WakeUp()
{
debug("Waking up ServiceCoordinator");
// Resume Run()
Guard guard(m_waitMutex);
m_workenUp = true;
m_waitCond.NotifyAll();
}
void ServiceCoordinator::RegisterService(Service* service)
{
m_services.push_back(service);
}