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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2008 Craig Edwards <craigedwards@brainbox.cc>
*
* This file is part of InspIRCd. InspIRCd 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, version 2.
*
* 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/>.
*/
#ifndef THREADENGINE_H
#define THREADENGINE_H
#include <vector>
#include <string>
#include <map>
#include "inspircd_config.h"
#include "base.h"
class ThreadData;
/** Derive from this class to implement your own threaded sections of
* code. Be sure to keep your code thread-safe and not prone to deadlocks
* and race conditions if you MUST use threading!
*/
class CoreExport Thread
{
private:
/** Set to true when the thread is to exit
*/
bool ExitFlag;
protected:
/** Get thread's current exit status.
* (are we being asked to exit?)
*/
bool GetExitFlag()
{
return ExitFlag;
}
public:
/** Opaque thread state managed by threading engine
*/
ThreadData* state;
/** Set Creator to NULL at this point
*/
Thread() : ExitFlag(false), state(NULL)
{
}
/* If the thread is running, you MUST join BEFORE deletion */
virtual ~Thread();
/** Override this method to put your actual
* threaded code here.
*/
virtual void Run() = 0;
/** Signal the thread to exit gracefully.
*/
virtual void SetExitFlag();
/** Join the thread (calls SetExitFlag and waits for exit)
*/
void join();
};
class CoreExport QueuedThread : public Thread
{
ThreadQueueData queue;
protected:
/** Waits for an enqueue operation to complete
* You MUST hold the queue lock when you call this.
* It will be unlocked while you wait, and will be relocked
* before the function returns
*/
void WaitForQueue()
{
queue.Wait();
}
public:
/** Lock queue.
*/
void LockQueue()
{
queue.Lock();
}
/** Unlock queue.
*/
void UnlockQueue()
{
queue.Unlock();
}
/** Unlock queue and wake up worker
*/
void UnlockQueueWakeup()
{
queue.Wakeup();
queue.Unlock();
}
virtual void SetExitFlag()
{
queue.Lock();
Thread::SetExitFlag();
queue.Wakeup();
queue.Unlock();
}
};
class CoreExport SocketThread : public Thread
{
ThreadQueueData queue;
ThreadSignalData signal;
protected:
/** Waits for an enqueue operation to complete
* You MUST hold the queue lock when you call this.
* It will be unlocked while you wait, and will be relocked
* before the function returns
*/
void WaitForQueue()
{
queue.Wait();
}
public:
/** Notifies parent by making the SignalFD ready to read
* No requirements on locking
*/
void NotifyParent();
SocketThread();
virtual ~SocketThread();
/** Lock queue.
*/
void LockQueue()
{
queue.Lock();
}
/** Unlock queue.
*/
void UnlockQueue()
{
queue.Unlock();
}
/** Unlock queue and send wakeup to worker
*/
void UnlockQueueWakeup()
{
queue.Wakeup();
queue.Unlock();
}
virtual void SetExitFlag()
{
queue.Lock();
Thread::SetExitFlag();
queue.Wakeup();
queue.Unlock();
}
/**
* Called in the context of the parent thread after a notification
* has passed through the socket
*/
virtual void OnNotify() = 0;
};
#endif
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