/*
* Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* This private header exports 3 APIs.
* _OSRosettaCheck() - An inline function that returns true if we are
* currently running under Rosetta.
* IF_ROSETTA() - Which is used to as a regular conditional
* expression that is true only if the current
* code is executing in the Rosetta
* translation space.
* ROSETTA_ONLY(exprs) - Which is used to create a block code that only
* executes if we are running in Rosetta.
*
* for example
*
* IF_ROSETTA() {
* // Do Cross endian swapping of input data
* outdata = OSSwap??(indata);
* }
* else {
* // Do straight through
* outdata = indata;
* }
*
* outdata = indata;
* ROSETTA_ONLY(
* // Do Cross endian swapping of input data
* outdata = OSSwap??(outdata);
* );
*/
#ifndef _LIBKERN_OSCROSSENDIAN_H
#define _LIBKERN_OSCROSSENDIAN_H
#include <sys/sysctl.h>
static __inline__ int
_OSRosettaCheck(void)
{
return 0;
}
#define IF_ROSETTA() if (__builtin_expect(_OSRosettaCheck(), 0) )
#define ROSETTA_ONLY(exprs) \
do { \
IF_ROSETTA() { \
exprs \
} \
} while(0)
#endif /* _LIBKERN_OSCROSSENDIAN_H */