/home/jeroen/FOX/fox/fox-1.7.33/include/FXReadWriteLock.h

/********************************************************************************
*                                                                               *
*                  R e a d - W r i t e   L o c k   C l a s s                    *
*                                                                               *
*********************************************************************************
* Copyright (C) 2004,2012 by Jeroen van der Zijp.   All Rights Reserved.        *
*********************************************************************************
* This library is free software; you can redistribute it and/or modify          *
* it under the terms of the GNU Lesser General Public License as published by   *
* the Free Software Foundation; either version 3 of the License, or             *
* (at your option) any later version.                                           *
*                                                                               *
* This library 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 Lesser General Public License for more details.                           *
*                                                                               *
* You should have received a copy of the GNU Lesser General Public License      *
* along with this program.  If not, see <http://www.gnu.org/licenses/>          *
********************************************************************************/
#ifndef FXREADWRITELOCK_H
#define FXREADWRITELOCK_H


namespace FX {


class FXAPI FXReadWriteLock {
private:
  volatile FXuval data[32];
private:
  FXReadWriteLock(const FXReadWriteLock&);
  FXReadWriteLock &operator=(const FXReadWriteLock&);
public:

  FXReadWriteLock();

  void readLock();

  FXbool tryReadLock();

  void readUnlock();

  FXbool readLocked();

  void writeLock();

  FXbool tryWriteLock();

  void writeUnlock();

  FXbool writeLocked();

 ~FXReadWriteLock();
  };


class FXAPI FXScopedReadLock {
private:
  FXReadWriteLock& rwlock;
private:
  FXScopedReadLock();
  FXScopedReadLock(const FXScopedReadLock&);
  FXScopedReadLock& operator=(const FXScopedReadLock&);
public:

  FXScopedReadLock(FXReadWriteLock& rwl):rwlock(rwl){ lock(); }

  FXReadWriteLock& readwritelock(){ return rwlock; }

  void lock(){ rwlock.readLock(); }

  FXbool trylock(){ return rwlock.tryReadLock(); }

  FXbool locked(){ return rwlock.readLocked(); }

  void unlock(){ rwlock.readUnlock(); }

  ~FXScopedReadLock(){ unlock(); }
  };



class FXAPI FXScopedWriteLock {
private:
  FXReadWriteLock& rwlock;
private:
  FXScopedWriteLock();
  FXScopedWriteLock(const FXScopedWriteLock&);
  FXScopedWriteLock& operator=(const FXScopedWriteLock&);
public:

  FXScopedWriteLock(FXReadWriteLock& rwl):rwlock(rwl){ lock(); }

  FXReadWriteLock& readwritelock(){ return rwlock; }

  void lock(){ rwlock.writeLock(); }

  FXbool trylock(){ return rwlock.tryWriteLock(); }

  FXbool locked(){ return rwlock.writeLocked(); }

  void unlock(){ rwlock.writeUnlock(); }

  ~FXScopedWriteLock(){ unlock(); }
  };

}

#endif