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