common.h

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/*
 * m68k/common.h
 * Common M68K configuration information.
 *
 * Copyright (c) 1996, 1997, 1998, 1999
 *	Transvirtual Technologies, Inc.  All rights reserved.
 *
 * Copyright (c) 2003
 *      Kaffe.org contributors. See ChangeLog for details.
 *
 * See the file "license.terms" for information on usage and redistribution 
 * of this file. 
 *
 * Written by Kiyo Inaba <[e-mail]>, 1998;
 * Based on the ports
 *      by Remi Perrot <[e-mail]> to m68k/linux
 * and
 *      by Alexandre Oliva <[e-mail]> to sparc
 *
 * Modified by Kiyo Inaba <[e-mail]>, 1999 to support
 *	both linux and netbsd1.
 */

#ifndef __m68k_common_h
#define __m68k_common_h

#include "atomicity.h"

/*
 * Alignment in structure is 2 bytes packed.
 */
#define ALIGNMENT_OF_SIZE(S)    (((S>1)?2:1))

/*
 * Do an atomic compare and exchange.  The address 'A' is checked against
 * value 'O' and if they match it's exchanged with value 'N'.
 * We return '1' if the exchange is successful, otherwise 0.
 */


#define COMPARE_AND_EXCHANGE(A, O, N)  (compare_and_swap((long int*) A, (long int) O, (long int) N)) 

#endif