nuttx/arch/sim/src/up_releasestack.c

105 lines
4.0 KiB
C

/****************************************************************************
* arch/sim/src/up_releasestack.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 <nuttx/arch.h>
#include <nuttx/kmalloc.h>
#include "up_internal.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_release_stack
*
* Description:
* A task has been stopped. Free all stack related resources retained in
* the defunct TCB.
*
* Input Parmeters
* - dtcb: The TCB containing information about the stack to be released
* - ttype: The thread type. This may be one of following (defined in
* include/nuttx/sched.h):
*
* TCB_FLAG_TTYPE_TASK Normal user task
* TCB_FLAG_TTYPE_PTHREAD User pthread
* TCB_FLAG_TTYPE_KERNEL Kernel thread
*
* This thread type is normally available in the flags field of the TCB,
* however, there are certain error recovery contexts where the TCB may
* not be fully initialized when up_release_stack is called.
*
* Returned Value:
* None
*
****************************************************************************/
void up_release_stack(FAR struct tcb_s *dtcb, uint8_t ttype)
{
/* Is there a stack allocated? */
if (dtcb->stack_alloc_ptr)
{
sched_ufree(dtcb->stack_alloc_ptr);
}
/* Mark the stack freed */
dtcb->stack_alloc_ptr = NULL;
dtcb->adj_stack_size = 0;
dtcb->adj_stack_ptr = NULL;
}