jmonitor.h
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/***************************************************************************
* Copyright (C) 2005 by Jeff Ferr *
* root@sat *
* *
* 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, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifndef J_MONITOR_H
#define J_MONITOR_H
#include "jmutex.h"
#include "jcondition.h"
#include <map>
namespace jthread {
struct jmonitor_map_t {
Condition sem;
bool signalled;
};
class Monitor {
private:
jmonitor_map_t * GetCurrentThread();
protected:
/** \brief */
Mutex _mutex;
/** \brief */
jmonitor_map_t *_holder;
/** \brief */
int _lock_count;
/** \brief */
std::vector<jmonitor_map_t *> waitQ,
readyQ;
#ifdef _WIN32
std::map<HANDLE, jmonitor_map_t *> threadQ;
#else
std::map<pthread_t, jmonitor_map_t *> threadQ;
#endif
protected:
/**
* \brief
*
*/
// Monitor(const Monitor&);
/**
* \brief
*
*/
Monitor & operator=(const Monitor&);
/**
* \brief
*
*/
void GrantMonitor();
public:
/**
* \brief Creates a Monitor Object.
*
*/
Monitor();
/**
* \brief Destroys a Monitor object.
*
*/
virtual ~Monitor();
/**
* \brief Requests a lock on the Monitor object. Will block if Lock is not available.
*
*/
void Enter();
/**
* \brief Requests a lock on the Monitor object. Will return false if Lock is not
* available. Returns true if lock was acquired.
*
*/
bool TryEnter();
/**
* \brief Requester must be a holder of the lock. If the Unlock succeeds, the lock is
* granted to the oldest waiting thread on the ReadyQ.
*
*/
void Exit();
/**
* \brief Requester must be a holder of the lock. The lock is released and requester put
* to sleep until the Monitor is signalled. Lock is re-acquired before control returns to
* the caller.
*/
void Wait();
/**
* \brief Requester must be a holder of the lock. The lock is released and requester put
* to sleep until the Monitor is signalled or the timeout expires. Lock is re-acquired
* before control returns to the caller.
*/
bool Wait(uint64_t secs);
/**
* \brief Signals and wakes up one thread waiting on the Monitor object. The thread woken
* up may not be the one signalled.
*
*/
void Notify();
/**
* \brief Signalls all waiting threads and wakes up one thread.
*/
void NotifyAll();
};
}
#endif