Thread.h

/*
 *  Thread class interface
 *
 *  This file is part of OTAWA
 *  Copyright (c) 2011-16, IRIT UPS.
 *
 *  OTAWA 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.
 *
 *  OTAWA 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 OTAWA; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef ELM_SYSTEM_THREAD_H_
#define ELM_SYSTEM_THREAD_H_
 
#include <elm/sys/SystemException.h>
#include <elm/util/MessageException.h>
 
namespace elm { namespace sys {
 
// pre-declaration
class Thread;
 
// ThreadException class
class ThreadException: public MessageException {
public:
    inline ThreadException(const string& message): MessageException(message) { }
};
 
 
// Runnable class
class Runnable {
    friend class Thread;
public:
    static Runnable null;
    Runnable(void);
    virtual ~Runnable(void);
 
    virtual void run(void);
 
    inline Thread *thread(void) const { return thr; }
    inline static Runnable& current(void);
 
protected:
    void stop(void);
private:
    Thread *thr;
};
 
 
// Thread class
class Thread {
    friend class Runnable;
 
public:
    virtual ~Thread(void);
    inline Runnable& runnable(void) const { return *_runnable; }
 
    static Thread *make(Runnable& runnable);
    static Thread *current(void);
    static void setRootRunnable(Runnable& runnable);
 
    virtual void start(void) = 0;
    virtual void join(void) = 0;
    virtual void kill(void) = 0;
    virtual bool isRunning(void) = 0;
 
protected:
    Runnable *_runnable;
    Thread(Runnable& runnable);
    virtual void stop(void) = 0;
};
 
inline Runnable& Runnable::current(void) { return Thread::current()->runnable(); }
 
 
class Mutex {
public:
    static Mutex *make(void);
    virtual ~Mutex(void);
    virtual void lock(void) = 0;
    virtual void unlock(void) = 0;
    virtual bool tryLock(void) = 0;
};
 
} } // elm::sys
 
#endif /* ELM_SYSTEM_THREAD_H_ */