| /**************************************************************************** |
| * mm/mm_heap/mm_malloc_size.c |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. The |
| * ASF licenses this file to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the |
| * License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations |
| * under the License. |
| * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <nuttx/config.h> |
| |
| #include <assert.h> |
| #include <debug.h> |
| |
| #include <nuttx/mm/mm.h> |
| |
| #include "mm_heap/mm.h" |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| size_t mm_malloc_size(FAR struct mm_heap_s *heap, FAR void *mem) |
| { |
| FAR struct mm_freenode_s *node; |
| #ifdef CONFIG_MM_HEAP_MEMPOOL |
| if (heap->mm_mpool) |
| { |
| ssize_t size = mempool_multiple_alloc_size(heap->mm_mpool, mem); |
| if (size >= 0) |
| { |
| return size; |
| } |
| } |
| #endif |
| |
| /* Protect against attempts to query a NULL reference */ |
| |
| if (!mem) |
| { |
| return 0; |
| } |
| |
| /* Map the memory chunk into a free node */ |
| |
| node = (FAR struct mm_freenode_s *)((FAR char *)mem - MM_SIZEOF_ALLOCNODE); |
| |
| /* Sanity check against double-frees */ |
| |
| DEBUGASSERT(MM_NODE_IS_ALLOC(node)); |
| |
| return MM_SIZEOF_NODE(node) - MM_ALLOCNODE_OVERHEAD; |
| } |