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/****************************************************************************
* mm/mm_mallinfo.c
*
* Copyright (C) 2007, 2009, 2013 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.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: mm_mallinfo
*
* Description:
* mallinfo returns a copy of updated current heap information.
*
****************************************************************************/
#ifndef CONFIG_MM_MULTIHEAP
static inline
#endif
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\n", region, node, node->size, node->preceding);
if (node->preceding & MM_ALLOC_BIT)
{
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;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: kmallinfo and mallinfo
*
* Description:
* mallinfo returns a copy of updated current heap information for either
* the user heap (mallinfo) or the kernel heap (kmallinfo).
*
****************************************************************************/
#if !defined(CONFIG_NUTTX_KERNEL) || !defined(__KERNEL__)
# ifdef CONFIG_CAN_PASS_STRUCTS
struct mallinfo mallinfo(void)
{
struct mallinfo info;
mm_mallinfo(&g_mmheap, &info);
return info;
}
# else
int mallinfo(struct mallinfo *info)
{
return mm_mallinfo(&g_mmheap, info);
}
#endif
#endif /* !CONFIG_NUTTX_KERNEL || !__KERNEL__ */
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