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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [score/] [inline/] [rtems/] [score/] [address.inl] - Blame information for rev 30

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/*  inline/address.inl
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 *
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 *  This include file contains the bodies of the routines
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 *  about addresses which are inlined.
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 *
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 *  COPYRIGHT (c) 1989-1999.
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 *  On-Line Applications Research Corporation (OAR).
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 *
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 *  The license and distribution terms for this file may be
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 *  found in the file LICENSE in this distribution or at
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 *  http://www.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: address.inl,v 1.2 2001-09-27 11:59:34 chris Exp $
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 */
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#ifndef __INLINE_ADDRESSES_inl
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#define __INLINE_ADDRESSES_inl
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/*PAGE
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 *
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 *  _Addresses_Add_offset
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 *
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 *  DESCRIPTION:
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 *
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 *  This function is used to add an offset to a base address.
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 *  It returns the resulting address.  This address is typically
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 *  converted to an access type before being used further.
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 */
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RTEMS_INLINE_ROUTINE void *_Addresses_Add_offset (
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  void       *base,
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  unsigned32  offset
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)
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{
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  return (void *)((char *)base + offset);
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}
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/*PAGE
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 *
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 *  _Addresses_Subtract_offset
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 *
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 *  DESCRIPTION:
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 *
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 *  This function is used to subtract an offset from a base
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 *  address.  It returns the resulting address.  This address is
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 *  typically converted to an access type before being used further.
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 */
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RTEMS_INLINE_ROUTINE void *_Addresses_Subtract_offset (
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  void       *base,
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  unsigned32  offset
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)
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{
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  return (void *)((char *)base - offset);
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}
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/*PAGE
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 *
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 *  _Addresses_Subtract
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 *
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 *  DESCRIPTION:
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 *
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 *  This function is used to subtract two addresses.  It returns the
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 *  resulting offset.
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 *
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 *  NOTE:  The cast of an address to an unsigned32 makes this code
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 *         dependent on an addresses being thirty two bits.
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 */
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RTEMS_INLINE_ROUTINE unsigned32 _Addresses_Subtract (
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  void *left,
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  void *right
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)
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{
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  return ((char *) left - (char *) right);
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}
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/*PAGE
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 *
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 *  _Addresses_Is_aligned
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 *
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 *  DESCRIPTION:
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 *
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 *  This function returns TRUE if the given address is correctly
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 *  aligned for this processor and FALSE otherwise.  Proper alignment
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 *  is based on correctness and efficiency.
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 */
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RTEMS_INLINE_ROUTINE boolean _Addresses_Is_aligned (
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  void *address
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)
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{
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    return ( ( (unsigned32)address % CPU_ALIGNMENT ) == 0 );
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}
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/*PAGE
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 *
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 *  _Addresses_Is_in_range
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 *
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 *  DESCRIPTION:
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 *
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 *  This function returns TRUE if the given address is within the
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 *  memory range specified and FALSE otherwise.  base is the address
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 *  of the first byte in the memory range and limit is the address
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 *  of the last byte in the memory range.  The base address is
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 *  assumed to be lower than the limit address.
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 */
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RTEMS_INLINE_ROUTINE boolean _Addresses_Is_in_range (
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  void *address,
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  void *base,
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  void *limit
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)
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{
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  return ( address >= base && address <= limit );
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}
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#endif
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/* end of include file */

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