109 lines
3.8 KiB
C
109 lines
3.8 KiB
C
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/************************************************************
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* mm_mallinfo.c
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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 Gregory Nutt 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 <assert.h>
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#include "mm_environment.h"
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#include "mm_internal.h"
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/************************************************************
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* Definitions
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************************************************************/
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/************************************************************
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* Private Data
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************************************************************/
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/************************************************************
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* Private Functions
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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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* mallinfo
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*
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* Description:
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* mallinfo returns a copy of updated current mallinfo.
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*
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************************************************************/
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struct mallinfo mallinfo(void)
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{
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static struct mallinfo stats;
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struct mm_allocnode_s *node;
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uint32 mxordblk = 0;
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int ordblks = 0; /* Number of non-inuse chunks */
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uint32 uordblks = 0; /* Total allocated space */
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uint32 fordblks = 0; /* Total non-inuse space */
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/* Visit each node in physical memory */
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for (node = g_heapstart;
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node < g_heapend;
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node = (struct mm_allocnode_s *)((char*)node + node->size))
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{
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if (node->preceding & MM_ALLOC_BIT)
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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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DEBUGASSERT(node == g_heapend);
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uordblks += SIZEOF_MM_ALLOCNODE; /* account for the tail node */
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DEBUGASSERT(uordblks + fordblks == g_heapsize);
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stats.arena = g_heapsize;
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stats.ordblks = ordblks;
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stats.mxordblk = mxordblk;
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stats.uordblks = uordblks;
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stats.fordblks = fordblks;
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return stats;
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}
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