110 lines
3.5 KiB
C
110 lines
3.5 KiB
C
/****************************************************************************
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* mm/mm_heap/mm_mallinfo.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <malloc.h>
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#include <assert.h>
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#include <debug.h>
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#include <nuttx/mm/mm.h>
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#include "mm_heap/mm.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static void mallinfo_handler(FAR struct mm_allocnode_s *node, FAR void *arg)
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{
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FAR struct mallinfo *info = arg;
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minfo("node=%p size=%u preceding=%u (%c)\n",
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node, (unsigned int)node->size,
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(unsigned int)(node->preceding & ~MM_ALLOC_BIT),
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(node->preceding & MM_ALLOC_BIT) ? 'A' : 'F');
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/* Check if the node corresponds to an allocated memory chunk */
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if ((node->preceding & MM_ALLOC_BIT) != 0)
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{
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DEBUGASSERT(node->size >= SIZEOF_MM_ALLOCNODE);
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info->aordblks++;
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info->uordblks += node->size;
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}
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else
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{
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FAR struct mm_freenode_s *fnode = (FAR void *)node;
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DEBUGASSERT(node->size >= SIZEOF_MM_FREENODE);
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DEBUGASSERT(fnode->blink->flink == fnode);
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DEBUGASSERT(fnode->blink->size <= fnode->size);
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DEBUGASSERT(fnode->flink == NULL ||
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fnode->flink->blink == fnode);
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DEBUGASSERT(fnode->flink == NULL ||
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fnode->flink->size == 0 ||
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fnode->flink->size >= fnode->size);
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info->ordblks++;
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info->fordblks += node->size;
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if (node->size > info->mxordblk)
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{
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info->mxordblk = node->size;
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}
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}
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: mm_mallinfo
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*
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* Description:
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* mallinfo returns a copy of updated current heap information.
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*
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****************************************************************************/
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int mm_mallinfo(FAR struct mm_heap_s *heap, FAR struct mallinfo *info)
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{
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#if CONFIG_MM_REGIONS > 1
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int region = heap->mm_nregions;
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#else
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# define region 1
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#endif
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DEBUGASSERT(info);
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memset(info, 0, sizeof(*info));
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mm_foreach(heap, mallinfo_handler, info);
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info->arena = heap->mm_heapsize;
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info->uordblks += region * SIZEOF_MM_ALLOCNODE; /* account for the tail node */
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DEBUGASSERT(info->uordblks + info->fordblks == heap->mm_heapsize);
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return OK;
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}
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