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1 30 unneback 
/*  priority.inl
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 *
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 *  This file contains the macro implementation of all inlined routines
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 *  in the Priority Handler.
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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: priority.inl,v 1.2 2001-09-27 11:59:34 chris Exp $
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 */
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#ifndef __PRIORITY_inl
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#define __PRIORITY_inl
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#include
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/*PAGE
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 *
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 *  _Priority_Handler_initialization
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 *
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 */
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#define _Priority_Handler_initialization() \
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  { \
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    unsigned32 index; \
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    \
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    _Priority_Major_bit_map = 0; \
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    for ( index=0 ; index <16 ; index++ ) \
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       _Priority_Bit_map[ index ] = 0; \
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  }
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/*PAGE
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 *
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 *  _Priority_Is_valid
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 *
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 */
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  /*
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   *  Since PRIORITY_MINIMUM is 0 and priorities are stored unsigned,
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   *  then checking for less than 0 is unnecessary.
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   */
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#define _Priority_Is_valid( _the_priority ) \
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  (  (_the_priority) <= PRIORITY_MAXIMUM )
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/*PAGE
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 *
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 *  _Priority_Major
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 *
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 */
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#define _Priority_Major( _the_priority ) ( (_the_priority) / 16 )
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/*PAGE
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 *
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 *  _Priority_Minor
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 *
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 */
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#define _Priority_Minor( _the_priority ) ( (_the_priority) % 16 )
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#if ( CPU_USE_GENERIC_BITFIELD_CODE == TRUE )
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/*PAGE
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 *
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 *  _Priority_Mask
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 *
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 */
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#define _Priority_Mask( _bit_number ) \
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  (0x8000 >> _bit_number)
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/*PAGE
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 *
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 *  _Priority_Bits_index
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 *
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 */
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#define _Priority_Bits_index( _bit_number ) \
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  (_bit_number)
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#endif
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/*PAGE
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 *
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 *  _Priority_Add_to_bit_map
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 *
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 */
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#define _Priority_Add_to_bit_map( _the_priority_map ) \
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   { \
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     *(_the_priority_map)->minor |= (_the_priority_map)->ready_minor; \
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     _Priority_Major_bit_map     |= (_the_priority_map)->ready_major; \
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   }
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/*PAGE
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 *
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 *  _Priority_Remove_from_bit_map
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 *
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 */
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#define _Priority_Remove_from_bit_map( _the_priority_map ) \
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   { \
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     *(_the_priority_map)->minor &= (_the_priority_map)->block_minor; \
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     if ( *(_the_priority_map)->minor == 0 ) \
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       _Priority_Major_bit_map &= (_the_priority_map)->block_major; \
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   }
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/*PAGE
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 *
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 *  _Priority_Get_highest
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 *
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 */
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#define _Priority_Get_highest( _high_priority ) \
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  { \
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    Priority_Bit_map_control minor; \
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    Priority_Bit_map_control major; \
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    \
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    _Bitfield_Find_first_bit( _Priority_Major_bit_map, major ); \
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    _Bitfield_Find_first_bit( _Priority_Bit_map[major], minor ); \
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    \
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    (_high_priority) = (_Priority_Bits_index( major ) * 16) +  \
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                        _Priority_Bits_index( minor ); \
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  }
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/*PAGE
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 *
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 *  _Priority_Initialize_information
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 *
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 */
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#define _Priority_Initialize_information( \
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     _the_priority_map, _new_priority ) \
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  { \
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    Priority_Bit_map_control _major; \
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    Priority_Bit_map_control _minor; \
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    Priority_Bit_map_control _mask;  \
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    \
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    _major = _Priority_Major( (_new_priority) ); \
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    _minor = _Priority_Minor( (_new_priority) ); \
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    \
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    (_the_priority_map)->minor =  \
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      &_Priority_Bit_map[ _Priority_Bits_index(_major) ]; \
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    \
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    _mask = _Priority_Mask( _major ); \
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    (_the_priority_map)->ready_major = _mask; \
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    (_the_priority_map)->block_major = ~_mask; \
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    \
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    _mask = _Priority_Mask( _minor ); \
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    (_the_priority_map)->ready_minor = _mask; \
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    (_the_priority_map)->block_minor = ~_mask; \
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  }
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/*PAGE
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 *
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 *  _Priority_Is_group_empty
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 *
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 */
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#define _Priority_Is_group_empty ( _the_priority ) \
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  ( (_the_priority) == 0 )
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#endif
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/* end of include file */

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