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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2010 InspIRCd Development Team
* See: http://wiki.inspircd.org/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#ifndef THREADENGINE_H
#define THREADENGINE_H
#include <vector>
#include <string>
#include <map>
#include "inspircd_config.h"
#include "base.h"
#ifdef WINDOWS
#include "threadengines/threadengine_win32.h"
#endif
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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