xmog_atomic_pointer.h

/*
 * Copyright 1999-2006 by Codemesh, Inc.  ALL RIGHTS RESERVED.
 */

//All RIGHTS RESERVED.
#ifndef xmog_atomic_pointer_inc
#define xmog_atomic_pointer_inc


#include "xmog.h"


// This matches all the conditionals in xmog_atomic_pointer.cpp - if it
// ends up with no native atomic exchange, we use ACE stuff to implement it.
#if !((XMOG_WINDOWS == 1) || \
      (defined (__GNUC__) && defined (__i386)) \
     )
#  define XMOG_NEED_TO_EMULATE_ATOMIC
#endif


class XMOG_DECLSPEC xmog_atomic_pointer
{
public:

    xmog_atomic_pointer() : value_( NULL ) {}

    xmog_atomic_pointer( void * p ) : value_( p ) {}

    xmog_atomic_pointer( const xmog_atomic_pointer & _rhs ) : value_( _rhs.value_ ) {}

    void *                  value() const 
    {
        return (void*)value_;
    }

    int                     operator == ( void * _rhs ) const
    {
        return value_ == _rhs;
    }

    int                     operator != ( void * _rhs ) const
    {
        return value_ != _rhs;
    }

    xmog_atomic_pointer &   operator = ( void * _rhs );

    xmog_atomic_pointer &   operator = ( xmog_atomic_pointer & _rhs );

private:

    void * volatile     value_;
};


#endif /* xmog_atomic_pointer_inc */

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