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typedefs.h
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1998-09-15
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/*
* @(#)typedefs.h 1.16 98/07/01
*
* Copyright 1995-1998 by Sun Microsystems, Inc.,
* 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
* All rights reserved.
*
* This software is the confidential and proprietary information
* of Sun Microsystems, Inc. ("Confidential Information"). You
* shall not disclose such Confidential Information and shall use
* it only in accordance with the terms of the license agreement
* you entered into with Sun.
*/
#ifndef _TYPEDEFS_H_
#define _TYPEDEFS_H_
#include "typedefs_md.h" /* for int64_t */
/*
* Macros to deal with the JavaVM's stack alignment. Many machines
* require doublewords to be double aligned. This union is used by
* code in math.h as a more portable way do alingnment on machines
* that require it. This union and the macros that use it came from
* Netscape.
*/
typedef union Java8Str {
int32_t x[2];
double d;
int64_t l;
void *p;
} Java8;
#ifdef HAVE_ALIGNED_LONGLONGS
#define GET_INT64(_t,_addr) ( ((_t).x[0] = ((int32_t*)(_addr))[0]), \
((_t).x[1] = ((int32_t*)(_addr))[1]), \
(_t).l )
#define SET_INT64(_t, _addr, _v) ( (_t).l = (_v), \
((int32_t*)(_addr))[0] = (_t).x[0], \
((int32_t*)(_addr))[1] = (_t).x[1] )
#else
#define GET_INT64(_t,_addr) (*(int64_t*)(_addr))
#define SET_INT64(_t, _addr, _v) (*(int64_t*)(_addr) = (_v))
#endif
/* If double's must be aligned on doubleword boundaries then define this */
#ifdef HAVE_ALIGNED_DOUBLES
#define GET_DOUBLE(_t,_addr) ( ((_t).x[0] = ((int32_t*)(_addr))[0]), \
((_t).x[1] = ((int32_t*)(_addr))[1]), \
(_t).d )
#define SET_DOUBLE(_t, _addr, _v) ( (_t).d = (_v), \
((int32_t*)(_addr))[0] = (_t).x[0], \
((int32_t*)(_addr))[1] = (_t).x[1] )
#else
#define GET_DOUBLE(_t,_addr) (*(double*)(_addr))
#define SET_DOUBLE(_t, _addr, _v) (*(double*)(_addr) = (_v))
#endif
/* If pointers are 64bits then define this */
#ifdef HAVE_64BIT_POINTERS
#define GET_HANDLE(_t,_addr) ( ((_t).x[0] = ((int32_t*)(_addr))[0]), \
((_t).x[1] = ((int32_t*)(_addr))[1]), \
(_t).p )
#define SET_HANDLE(_t, _addr, _v) ( (_t).p = (_v), \
((int32_t*)(_addr))[0] = (_t).x[0], \
((int32_t*)(_addr))[1] = (_t).x[1] )
#else
#define GET_HANDLE(_t,_addr) (*(JHandle*)(_addr))
#define SET_HANDLE(_t, _addr, _v) (*(JHandle*)(_addr) = (_v))
#endif
#endif /* !_TYPEDEFS_H_ */