132 lines
4.5 KiB
C
132 lines
4.5 KiB
C
/****************************************************************************
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* mm/mm_heap/mm_mallinfo.c
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*
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* Copyright (C) 2007, 2009, 2013-2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 <stdlib.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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/****************************************************************************
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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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FAR struct mm_allocnode_s *node;
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size_t mxordblk = 0;
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int ordblks = 0; /* Number of non-inuse chunks */
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size_t uordblks = 0; /* Total allocated space */
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size_t fordblks = 0; /* Total non-inuse space */
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#if CONFIG_MM_REGIONS > 1
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int region;
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#else
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# define region 0
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#endif
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DEBUGASSERT(info);
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/* Visit each region */
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#if CONFIG_MM_REGIONS > 1
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for (region = 0; region < heap->mm_nregions; region++)
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#endif
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{
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/* Visit each node in the region
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* Retake the semaphore for each region to reduce latencies
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*/
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mm_takesemaphore(heap);
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for (node = heap->mm_heapstart[region];
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node < heap->mm_heapend[region];
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node = (FAR struct mm_allocnode_s *)((FAR char *)node + node->size))
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{
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minfo("region=%d node=%p size=%u preceding=%u (%c)\n",
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region, 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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uordblks += node->size;
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}
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else
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{
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ordblks++;
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fordblks += node->size;
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if (node->size > mxordblk)
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{
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mxordblk = node->size;
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}
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}
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}
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minfo("region=%d node=%p heapend=%p\n",
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region, node, heap->mm_heapend[region]);
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DEBUGASSERT(node == heap->mm_heapend[region]);
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mm_givesemaphore(heap);
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uordblks += SIZEOF_MM_ALLOCNODE; /* account for the tail node */
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}
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#undef region
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DEBUGASSERT(uordblks + fordblks == heap->mm_heapsize);
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info->arena = heap->mm_heapsize;
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info->ordblks = ordblks;
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info->mxordblk = mxordblk;
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info->uordblks = uordblks;
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info->fordblks = fordblks;
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return OK;
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}
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