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1 30 unneback 
/*  region.inl
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 *
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 *  This file contains the macro implementation of the inlined
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 *  routines from the Region Manager.
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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: region.inl,v 1.2 2001-09-27 11:59:18 chris Exp $
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 */
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#ifndef __REGION_inl
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#define __REGION_inl
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/*PAGE
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 *
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 *  _Region_Allocate
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 *
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 *  DESCRIPTION:
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 *
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 *  This function allocates a region control block from
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 *  the inactive chain of free region control blocks.
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 */
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RTEMS_INLINE_ROUTINE Region_Control *_Region_Allocate( void )
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{
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  return (Region_Control *) _Objects_Allocate( &_Region_Information );
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}
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/*PAGE
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 *
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 *  _Region_Free
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 *
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 *  DESCRIPTION:
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 *
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 *  This routine frees a region control block to the
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 *  inactive chain of free region control blocks.
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 */
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RTEMS_INLINE_ROUTINE void _Region_Free (
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  Region_Control *the_region
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)
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{
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  _Objects_Free( &_Region_Information, &the_region->Object );
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}
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/*PAGE
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 *
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 *  _Region_Get
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 *
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 *  DESCRIPTION:
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 *
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 *  This function maps region IDs to region control blocks.
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 *  If ID corresponds to a local region, then it returns
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 *  the_region control pointer which maps to ID and location
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 *  is set to OBJECTS_LOCAL.  Otherwise, location is set
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 *  to OBJECTS_ERROR and the_region is undefined.
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 */
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RTEMS_INLINE_ROUTINE Region_Control *_Region_Get (
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  Objects_Id         id,
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  Objects_Locations *location
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)
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{
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  return (Region_Control *)
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    _Objects_Get( &_Region_Information, id, location );
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}
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/*PAGE
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 *
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 *  _Region_Allocate_segment
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 *
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 *  DESCRIPTION:
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 *
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 *  This function attempts to allocate a segment from the_region.
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 *  If successful, it returns the address of the allocated segment.
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 *  Otherwise, it returns NULL.
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 */
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RTEMS_INLINE_ROUTINE void *_Region_Allocate_segment (
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  Region_Control *the_region,
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  unsigned32      size
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)
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{
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   return _Heap_Allocate( &the_region->Memory, size );
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}
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/*PAGE
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 *
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 *  _Region_Free_segment
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 *
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 *  DESCRIPTION:
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 *
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 *  This function frees the_segment to the_region.
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 */
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RTEMS_INLINE_ROUTINE boolean _Region_Free_segment (
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  Region_Control *the_region,
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  void           *the_segment
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)
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{
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  return _Heap_Free( &the_region->Memory, the_segment );
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}
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/*PAGE
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 *
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 *  _Region_Is_null
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 *
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 *  DESCRIPTION:
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 *
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 *  This function returns TRUE if the_region is NULL and FALSE otherwise.
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 */
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RTEMS_INLINE_ROUTINE boolean _Region_Is_null (
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  Region_Control *the_region
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)
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{
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  return ( the_region == NULL  );
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}
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#endif
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/* end of include file */

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