94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/****************************************************************************
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* mm/mm_heap/mm_heapmember.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <nuttx/config.h>
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#include <assert.h>
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#include <debug.h>
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#include <nuttx/mm/mm.h>
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#include "mm_heap/mm.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: mm_heapmember
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*
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* Description:
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* Check if an address lies in the heap.
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*
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* Parameters:
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* heap - The heap to check
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* mem - The address to check
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*
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* Return Value:
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* true if the address is a member of the heap. false if not
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* not. If the address is not a member of the heap, then it
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* must be a member of the user-space heap (unchecked)
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*
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****************************************************************************/
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bool mm_heapmember(FAR struct mm_heap_s *heap, FAR void *mem)
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{
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#if CONFIG_MM_REGIONS > 1
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int i;
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/* A valid address from the heap for this region would have to lie
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* between the region's two guard nodes.
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*/
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for (i = 0; i < heap->mm_nregions; i++)
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{
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if (mem > (FAR void *)heap->mm_heapstart[i] &&
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mem < (FAR void *)heap->mm_heapend[i])
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{
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return true;
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}
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}
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/* The address does not like any any region assigned to the heap */
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return false;
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#else
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/* A valid address from the heap would have to lie between the
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* two guard nodes.
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*/
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if (mem > (FAR void *)heap->mm_heapstart[0] &&
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mem < (FAR void *)heap->mm_heapend[0])
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{
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return true;
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}
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/* Otherwise, the address does not lie in the heap */
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return false;
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#endif
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}
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