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/* heap.inl
*
* This file contains the macro implementation of the inlined
* routines from the heap handler.
*
* COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
* On-Line Applications Research Corporation (OAR).
* All rights assigned to U.S. Government, 1994.
*
* This material may be reproduced by or for the U.S. Government pursuant
* to the copyright license under the clause at DFARS 252.227-7013. This
* notice must appear in all copies of this file and its derivatives.
*
* $Id$
*/
#ifndef __HEAP_inl
#define __HEAP_inl
#include <rtems/score/address.h>
/*PAGE
*
* _Heap_Head
*/
#define _Heap_Head( _the_heap ) \
((Heap_Block *)&(_the_heap)->start)
/*PAGE
*
* _Heap_Tail
*/
#define _Heap_Tail( _the_heap ) \
((Heap_Block *)&(_the_heap)->final)
/*PAGE
*
* _Heap_Previous_block
*/
#define _Heap_Previous_block( _the_block ) \
( (Heap_Block *) _Addresses_Subtract_offset( \
(void *)(_the_block), \
(_the_block)->back_flag & ~ HEAP_BLOCK_USED \
) \
)
/*PAGE
*
* _Heap_Next_block
*/
#define _Heap_Next_block( _the_block ) \
( (Heap_Block *) _Addresses_Add_offset( \
(void *)(_the_block), \
(_the_block)->front_flag & ~ HEAP_BLOCK_USED \
) \
)
/*PAGE
*
* _Heap_Block_at
*/
#define _Heap_Block_at( _base, _offset ) \
( (Heap_Block *) \
_Addresses_Add_offset( (void *)(_base), (_offset) ) )
/*PAGE
*
* _Heap_User_block_at
*
*/
#define _Heap_User_block_at( _base ) \
_Heap_Block_at( \
(_base), \
-*(((unsigned32 *) (_base)) - 1) + -HEAP_BLOCK_USED_OVERHEAD \
)
/*PAGE
*
* _Heap_Is_previous_block_free
*/
#define _Heap_Is_previous_block_free( _the_block ) \
( !((_the_block)->back_flag & HEAP_BLOCK_USED) )
/*PAGE
*
* _Heap_Is_block_free
*/
#define _Heap_Is_block_free( _the_block ) \
( !((_the_block)->front_flag & HEAP_BLOCK_USED) )
/*PAGE
*
* _Heap_Is_block_used
*/
#define _Heap_Is_block_used( _the_block ) \
((_the_block)->front_flag & HEAP_BLOCK_USED)
/*PAGE
*
* _Heap_Block_size
*/
#define _Heap_Block_size( _the_block ) \
((_the_block)->front_flag & ~HEAP_BLOCK_USED)
/*PAGE
*
* _Heap_Start_of_user_area
*/
#define _Heap_Start_of_user_area( _the_block ) \
((void *) &(_the_block)->next)
/*PAGE
*
* _Heap_Is_block_in
*/
#define _Heap_Is_block_in( _the_heap, _the_block ) \
( ((_the_block) >= (_the_heap)->start) && \
((_the_block) <= (_the_heap)->final) )
/*PAGE
*
* _Heap_Is_page_size_valid
*/
#define _Heap_Is_page_size_valid( _page_size ) \
( ((_page_size) != 0) && \
(((_page_size) % CPU_HEAP_ALIGNMENT) == 0) )
/*PAGE
*
* _Heap_Build_flag
*/
#define _Heap_Build_flag( _size, _in_use_flag ) \
( (_size) | (_in_use_flag))
#endif
/* end of include file */
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