diff options
author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2000-10-18 14:57:12 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2000-10-18 14:57:12 +0000 |
commit | 252565f24da1ca21bd681acf621201b5318d95d7 (patch) | |
tree | 0b35eb16e1f3871d3fa9e0d5071397247ab8cb88 /cpukit/score/src/heapgetinfo.c | |
parent | 2000-09-14 Ralf Corsepius <corsepiu@faw.uni-ulm.de> (diff) | |
download | rtems-252565f24da1ca21bd681acf621201b5318d95d7.tar.bz2 |
2000-10-18 Nick Simon <Nick.SIMON@syntegra.bt.co.uk>
* src/heapgetinfo.c, include/rtems/score/heap.h, src/Makefile.am:
Added _Heap_Get_information() and information control block.
* src/heapgetinfo.c: New file.
Diffstat (limited to 'cpukit/score/src/heapgetinfo.c')
-rw-r--r-- | cpukit/score/src/heapgetinfo.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/cpukit/score/src/heapgetinfo.c b/cpukit/score/src/heapgetinfo.c new file mode 100644 index 0000000000..a55348c3c8 --- /dev/null +++ b/cpukit/score/src/heapgetinfo.c @@ -0,0 +1,101 @@ +/* + * Heap Handler + * + * COPYRIGHT (c) 1989-2000. + * 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. + * + */ + + +#include <rtems/system.h> +#include <rtems/score/sysstate.h> +#include <rtems/score/heap.h> + +/*PAGE + * + * _Heap_Get_information + * + * This kernel routine walks the heap and tots up the free and allocated + * sizes. Derived from _Heap_Walk. + * + * Input parameters: + * the_heap - pointer to heap header + * + * Output parameters: + * free_sz - Pointer for free amount return + * used_sz - Pointer for used amount return + * return 0=success, otherwise heap is corrupt. + */ + + +Heap_Get_information_status _Heap_Get_information( + Heap_Control *the_heap, + Heap_Information_block *the_info +) +{ + Heap_Block *the_block = 0; /* avoid warnings */ + Heap_Block *next_block = 0; /* avoid warnings */ + int notdone = 1; + + + the_info->free_blocks = 0; + the_info->free_size = 0; + the_info->used_blocks = 0; + the_info->used_size = 0; + + /* + * We don't want to allow walking the heap until we have + * transferred control to the user task so we watch the + * system state. + */ + + if ( !_System_state_Is_up( _System_state_Get() ) ) + return HEAP_GET_INFORMATION_SYSTEM_STATE_ERROR; + + the_block = the_heap->start; + + /* + * Handle the 1st block + */ + + if ( the_block->back_flag != HEAP_DUMMY_FLAG ) { + return HEAP_GET_INFORMATION_BLOCK_ERROR; + } + + while (notdone) { + + /* + * Accumulate size + */ + + if ( _Heap_Is_block_free(the_block) ) { + the_info->free_blocks++; + the_info->free_size += _Heap_Block_size(the_block); + } else { + the_info->used_blocks++; + the_info->used_size += _Heap_Block_size(the_block); + } + + /* + * Handle the last block + */ + + if ( the_block->front_flag != HEAP_DUMMY_FLAG ) { + next_block = _Heap_Next_block(the_block); + if ( the_block->front_flag != next_block->back_flag ) { + return HEAP_GET_INFORMATION_BLOCK_ERROR; + } + } + + if ( the_block->front_flag == HEAP_DUMMY_FLAG ) + notdone = 0; + else + the_block = next_block; + } /* while(notdone) */ + + return HEAP_GET_INFORMATION_SUCCESSFUL; +} |