diff options
Diffstat (limited to 'cpukit/score')
-rw-r--r-- | cpukit/score/include/rtems/score/heap.h | 16 | ||||
-rw-r--r-- | cpukit/score/src/heapgreedy.c | 13 |
2 files changed, 28 insertions, 1 deletions
diff --git a/cpukit/score/include/rtems/score/heap.h b/cpukit/score/include/rtems/score/heap.h index 2937490896..bea9f3ec25 100644 --- a/cpukit/score/include/rtems/score/heap.h +++ b/cpukit/score/include/rtems/score/heap.h @@ -595,7 +595,7 @@ void _Heap_Iterate( /** * @brief Greedy allocate that empties the heap. * - * Afterward the heap has at most @a block_count allocateable blocks of sizes + * Afterwards the heap has at most @a block_count allocatable blocks of sizes * specified by @a block_sizes. The @a block_sizes must point to an array with * @a block_count members. All other blocks are used. * @@ -608,6 +608,20 @@ Heap_Block *_Heap_Greedy_allocate( ); /** + * @brief Greedy allocate all blocks except the largest free block. + * + * Afterwards the heap has at most one allocatable block. This block is the + * largest free block if it exists. The allocatable size of this block is + * stored in @a allocatable_size. All other blocks are used. + * + * @see _Heap_Greedy_free(). + */ +Heap_Block *_Heap_Greedy_allocate_all_except_largest( + Heap_Control *heap, + uintptr_t *allocatable_size +); + +/** * @brief Frees blocks of a greedy allocation. * * The @a blocks must be the return value of _Heap_Greedy_allocate(). diff --git a/cpukit/score/src/heapgreedy.c b/cpukit/score/src/heapgreedy.c index 23eb4cdd3a..b5c61a4e64 100644 --- a/cpukit/score/src/heapgreedy.c +++ b/cpukit/score/src/heapgreedy.c @@ -75,6 +75,19 @@ Heap_Block *_Heap_Greedy_allocate( return blocks; } +Heap_Block *_Heap_Greedy_allocate_all_except_largest( + Heap_Control *heap, + uintptr_t *allocatable_size +) +{ + Heap_Information info; + + _Heap_Get_free_information( heap, &info ); + *allocatable_size = info.largest - HEAP_BLOCK_HEADER_SIZE + HEAP_ALLOC_BONUS; + + return _Heap_Greedy_allocate( heap, allocatable_size, 1 ); +} + void _Heap_Greedy_free( Heap_Control *heap, Heap_Block *blocks |