84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
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/****************************************************************************
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* sched/group/group_realloc.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 <sys/types.h>
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#include <assert.h>
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#include <nuttx/sched.h>
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#include <nuttx/kmalloc.h>
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#include "sched/sched.h"
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#include "group/group.h"
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#ifdef CONFIG_MM_KERNEL_HEAP
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: group_realloc
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*
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* Description:
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* Re-allocate memory appropriate for the group type. If the memory is
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* part of a privileged group, then it should be allocated so that it
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* is only accessible by privileged code; Otherwise, it is a user mode
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* group and must be allocated so that it accessible by unprivileged
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* code.
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*
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****************************************************************************/
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FAR void *group_realloc(FAR struct task_group_s *group, FAR void *oldmem,
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size_t newsize)
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{
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/* A NULL group pointer means the current group */
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if (group == NULL)
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{
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FAR struct tcb_s *tcb = this_task();
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DEBUGASSERT(tcb && tcb->group);
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group = tcb->group;
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}
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/* Check the group type */
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if ((group->tg_flags & GROUP_FLAG_PRIVILEGED) != 0)
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{
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/* It is a privileged group... use the kernel mode memory allocator */
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return kmm_realloc(oldmem, newsize);
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}
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else
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{
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/* This is an unprivileged group... use the user mode memory
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* allocator.
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*/
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return kumm_realloc(oldmem, newsize);
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}
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}
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#endif /* CONFIG_MM_KERNEL_HEAP */
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