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/* heap.inl
*
* This file contains the static inline 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/address.h>
/*PAGE
*
* _Heap_Head
*
*/
STATIC INLINE Heap_Block *_Heap_Head (
Heap_Control *the_heap
)
{
return (Heap_Block *)&the_heap->start;
}
/*PAGE
*
* _Heap_Tail
*
*/
STATIC INLINE Heap_Block *_Heap_Tail (
Heap_Control *the_heap
)
{
return (Heap_Block *)&the_heap->final;
}
/*PAGE
*
* _Heap_Previous_block
*
*/
STATIC INLINE Heap_Block *_Heap_Previous_block (
Heap_Block *the_block
)
{
return (Heap_Block *) _Addresses_Subtract_offset(
(void *)the_block,
the_block->back_flag & ~ HEAP_BLOCK_USED
);
}
/*PAGE
*
* _Heap_Next_block
*
* NOTE: Next_block assumes that the block is free.
*/
STATIC INLINE Heap_Block *_Heap_Next_block (
Heap_Block *the_block
)
{
return (Heap_Block *) _Addresses_Add_offset(
(void *)the_block,
the_block->front_flag & ~ HEAP_BLOCK_USED
);
}
/*PAGE
*
* _Heap_Block_at
*
*/
STATIC INLINE Heap_Block *_Heap_Block_at(
void *base,
unsigned32 offset
)
{
return (Heap_Block *) _Addresses_Add_offset( (void *)base, offset );
}
/*PAGE
*
* _Heap_Is_previous_block_free
*
*/
STATIC INLINE boolean _Heap_Is_previous_block_free (
Heap_Block *the_block
)
{
return !(the_block->back_flag & HEAP_BLOCK_USED);
}
/*PAGE
*
* _Heap_Is_block_free
*
*/
STATIC INLINE boolean _Heap_Is_block_free (
Heap_Block *the_block
)
{
return !(the_block->front_flag & HEAP_BLOCK_USED);
}
/*PAGE
*
* _Heap_Is_block_used
*
*/
STATIC INLINE boolean _Heap_Is_block_used (
Heap_Block *the_block
)
{
return (the_block->front_flag & HEAP_BLOCK_USED);
}
/*PAGE
*
* _Heap_Block_size
*
*/
STATIC INLINE unsigned32 _Heap_Block_size (
Heap_Block *the_block
)
{
return (the_block->front_flag & ~HEAP_BLOCK_USED);
}
/*PAGE
*
* _Heap_Start_of_user_area
*
*/
STATIC INLINE void *_Heap_Start_of_user_area (
Heap_Block *the_block
)
{
return (void *) &the_block->next;
}
/*PAGE
*
* _Heap_Is_block_in
*
*/
STATIC INLINE boolean _Heap_Is_block_in (
Heap_Control *the_heap,
Heap_Block *the_block
)
{
return _Addresses_Is_in_range( the_block, the_heap->start, the_heap->final );
}
/*PAGE
*
* _Heap_Is_page_size_valid
*
*/
STATIC INLINE boolean _Heap_Is_page_size_valid(
unsigned32 page_size
)
{
return ((page_size != 0) &&
((page_size % CPU_HEAP_ALIGNMENT) == 0));
}
/*PAGE
*
* _Heap_Build_flag
*
*/
STATIC INLINE unsigned32 _Heap_Build_flag (
unsigned32 size,
unsigned32 in_use_flag
)
{
return size | in_use_flag;
}
#endif
/* end of include file */
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