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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [score/] [src/] [heapsizeofuserarea.c] - Rev 619
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/* * Heap Handler * * COPYRIGHT (c) 1989-1999. * On-Line Applications Research Corporation (OAR). * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.OARcorp.com/rtems/license.html. * * $Id: heapsizeofuserarea.c,v 1.2 2001-09-27 11:59:34 chris Exp $ */ #include <rtems/system.h> #include <rtems/score/sysstate.h> #include <rtems/score/heap.h> /*PAGE * * _Heap_Size_of_user_area * * This kernel routine returns the size of the memory area * given heap block. * * Input parameters: * the_heap - pointer to heap header * starting_address - starting address of the memory block to free. * size - pointer to size of area * * Output parameters: * size - size of area filled in * TRUE - if starting_address is valid heap address * FALSE - if starting_address is invalid heap address */ boolean _Heap_Size_of_user_area( Heap_Control *the_heap, void *starting_address, unsigned32 *size ) { Heap_Block *the_block; Heap_Block *next_block; unsigned32 the_size; the_block = _Heap_User_block_at( starting_address ); if ( !_Heap_Is_block_in( the_heap, the_block ) || _Heap_Is_block_free( the_block ) ) return( FALSE ); the_size = _Heap_Block_size( the_block ); next_block = _Heap_Block_at( the_block, the_size ); if ( !_Heap_Is_block_in( the_heap, next_block ) || (the_block->front_flag != next_block->back_flag) ) return( FALSE ); *size = the_size; return( TRUE ); }
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