119 lines
4.4 KiB
C
119 lines
4.4 KiB
C
/************************************************************************
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* sched/group/group_malloc.c
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*
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* Copyright (C) 2014 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 <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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#if (defined(CONFIG_BUILD_PROTECTED) || defined(CONFIG_BUILD_KERNEL)) && \
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defined(CONFIG_MM_KERNEL_HEAP)
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/************************************************************************
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* Pre-processor Definitions
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************************************************************************/
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/************************************************************************
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* Private Type Declarations
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************************************************************************/
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/************************************************************************
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* Global Variables
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************************************************************************/
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/************************************************************************
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* Private Variables
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************************************************************************/
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/************************************************************************
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* Private Function Prototypes
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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: group_malloc
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*
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* Description:
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* 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_malloc(FAR struct task_group_s *group, size_t nbytes)
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{
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/* A NULL group pointer means the current group */
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if (!group)
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{
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FAR struct tcb_s *tcb = (FAR struct tcb_s *)g_readytorun.head;
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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_malloc(nbytes);
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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_malloc(nbytes);
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}
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}
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#endif /* CONFIG_BUILD_PROTECTED || CONFIG_BUILD_KERNEL) && CONFIG_MM_KERNEL_HEAP */
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