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/************************************************************************
* mm/kmm_heap/kmm_heapmember.c
*
* Copyright (C) 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 <stdbool.h>
#include <nuttx/mm.h>
#if defined(CONFIG_MM_KERNEL_HEAP) && defined(CONFIG_DEBUG)
/************************************************************************
* Pre-processor definition
************************************************************************/
/************************************************************************
* Private Types
************************************************************************/
/************************************************************************
* Public Data
************************************************************************/
/************************************************************************
* Private Functions
************************************************************************/
/************************************************************************
* Public Functions
************************************************************************/
/************************************************************************
* Name: kmm_heapmember
*
* Description:
* Check if an address lies in the kernel heap.
*
* Parameters:
* mem - The address to check
*
* Return Value:
* true if the address is a member of the kernel heap. false if not
* not. If the address is not a member of the kernel heap, then it
* must be a member of the user-space heap (unchecked)
*
************************************************************************/
bool kmm_heapmember(FAR void *mem)
{
#if CONFIG_MM_REGIONS > 1
int i;
/* A valid address from the kernel heap for this region would have to lie
* between the region's two guard nodes.
*/
for (i = 0; i < g_kmmheap.mm_nregions; i++)
{
if (mem > (FAR void *)g_kmmheap.mm_heapstart[i] &&
mem < (FAR void *)g_kmmheap.mm_heapend[i])
{
return true;
}
}
/* The address does not like any any region assigned to kernel heap */
return false;
#else
/* A valid address from the kernel heap would have to lie between the
* two guard nodes.
*/
if (mem > (FAR void *)g_kmmheap.mm_heapstart[0] &&
mem < (FAR void *)g_kmmheap.mm_heapend[0])
{
return true;
}
/* Otherwise, the address does not lie in the kernel heap */
return false;
#endif
}
#endif /* CONFIG_MM_KERNEL_HEAP && CONFIG_DEBUG */
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