147 lines
4.8 KiB
C
147 lines
4.8 KiB
C
/****************************************************************************
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* mm/mm_mallinfo.c
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*
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* Copyright (C) 2007, 2009 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 <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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* Pre-processor 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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* Name: 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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#ifdef CONFIG_CAN_PASS_STRUCTS
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struct mallinfo mallinfo(void)
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#else
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int mallinfo(struct mallinfo *info)
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#endif
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{
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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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#ifdef CONFIG_CAN_PASS_STRUCTS
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static struct mallinfo info;
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#else
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if (!info)
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{
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return ERROR;
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}
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#endif
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/* Visit each region */
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#if CONFIG_MM_REGIONS > 1
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for (region = 0; region < g_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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for (node = g_heapstart[region];
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node < g_heapend[region];
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node = (struct mm_allocnode_s *)((char*)node + node->size))
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{
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mvdbg("region=%d node=%p preceding=%p\n", region, node, node->preceding);
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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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mvdbg("region=%d node=%p g_heapend=%p\n", region, node, g_heapend[region]);
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DEBUGASSERT(node == g_heapend[region]);
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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 == g_heapsize);
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#ifdef CONFIG_CAN_PASS_STRUCTS
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info.arena = g_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 info;
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#else
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info->arena = g_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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#endif
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}
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