/ray/src/lib/threads/rwlock.h

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/*
 * lib/threads/rwlock.h
 * 
 * Implementing a thread-save read/write lock. 
 * 
 * Copyright (c) 2004 by Wolfgang Wieser ] wwieser (a) gmx <*> de [ 
 * 
 * This file may be distributed and/or modified under the terms of the 
 * GNU General Public License version 2 as published by the Free Software 
 * Foundation. (See COPYING.GPL for details.)
 * 
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 * 
 */

#ifndef _ThreadLibrary_ReadWriteLock_H_
#define _ThreadLibrary_ReadWriteLock_H_ 1

#include <lib/sconfig.h>    /* MUST be first */

#include <glib/gthread.h>

class /*_packed_*/ ReadWriteLock
{
    private:
        GStaticRWLock l;  
        
    public:
        inline ReadWriteLock()
            {  g_static_rw_lock_init(&l);  }
        
        inline ~ReadWriteLock()
            {  g_static_rw_lock_free(&l);  }
        
        inline void ReadLock()
            {  g_static_rw_lock_reader_lock(&l);  }
        
        inline bool ReadTest()
            {  return(g_static_rw_lock_reader_trylock(&l));  }
        
        inline void ReadUnlock()
            {  g_static_rw_lock_reader_unlock(&l);  }
        
        inline void WriteLock()
            {  g_static_rw_lock_writer_lock(&l);  }
        
        inline bool WriteTest()
            {  return(g_static_rw_lock_writer_trylock(&l));  }
        
        inline void WriteUnlock()
            {  g_static_rw_lock_writer_unlock(&l);  }
        
};

#endif  /* _ThreadLibrary_ReadWriteLock_H_ */

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