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/*
* This file is part of nzbget. See <http://nzbget.net>.
*
* Copyright (C) 2004 Sven Henkel <sidddy@users.sourceforge.net>
* Copyright (C) 2007-2019 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 "Log.h"
#include "Thread.h"
int Thread::m_threadCount = 1; // take the main program thread into account
std::unique_ptr<Mutex> Thread::m_threadMutex;
void Thread::Init()
{
debug("Initializing global thread data");
m_threadMutex = std::make_unique<Mutex>();
}
Thread::Thread()
{
debug("Creating Thread");
}
Thread::~Thread()
{
debug("Destroying Thread");
}
void Thread::Start()
{
debug("Starting Thread");
m_running = true;
// NOTE: "m_threadMutex" ensures that "t" lives until the very end of the function
Guard guard(m_threadMutex);
// start the new thread
std::thread t([&]{
{
// trying to lock "m_threadMutex", this will wait until function "Start()" is completed
// and "t" is detached.
Guard guard(m_threadMutex);
}
thread_handler();
});
// save the native handle to be able to cancel (Kill) the thread and then detach
m_threadObj = t.native_handle();
t.detach();
}
void Thread::Stop()
{
debug("Stopping Thread");
m_stopped = true;
}
void Thread::Resume()
{
debug("Resuming Thread");
m_stopped = false;
}
bool Thread::Kill()
{
debug("Killing Thread");
Guard guard(m_threadMutex);
#ifdef WIN32
bool terminated = TerminateThread(m_threadObj, 0) != 0;
#else
#ifdef HAVE_PTHREAD_CANCEL
bool terminated = pthread_cancel(m_threadObj) == 0;
#else
bool terminated = false;
warn("Could not kill thread: thread cancelling isn't supported on this platform");
#endif
#endif
if (terminated)
{
m_threadCount--;
}
return terminated;
}
void Thread::thread_handler()
{
m_threadCount++;
debug("Entering Thread-func");
Run();
debug("Thread-func exited");
m_running = false;
m_threadCount--;
if (m_autoDestroy)
{
debug("Autodestroying Thread-object");
delete this;
}
}
int Thread::GetThreadCount()
{
Guard guard(m_threadMutex);
return m_threadCount;
}
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