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146 lines
4.8 KiB
146 lines
4.8 KiB
/**************************************************************************** |
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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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