135 lines
4.9 KiB
C
135 lines
4.9 KiB
C
/************************************************************************
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* sched/signal/sig_cleanup.c
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*
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* Copyright (C) 2007, 2009 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 <nuttx/config.h>
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#include <nuttx/arch.h>
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#include "os_internal.h"
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#include "signal/signal.h"
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/************************************************************************
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* 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 Functions
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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: sig_cleanup
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*
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* Description:
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* Deallocate all signal-related lists in a TCB. This function is
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* called only at task deletion time. The caller is expected to have
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* assured the critical section necessary to perform this action.
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*
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************************************************************************/
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void sig_cleanup(FAR struct tcb_s *stcb)
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{
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FAR sigactq_t *sigact;
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FAR sigq_t *sigq;
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/* Deallocate all entries in the list of signal actions */
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while ((sigact = (FAR sigactq_t*)sq_remfirst(&stcb->sigactionq)) != NULL)
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{
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sig_releaseaction(sigact);
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}
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/* Deallocate all entries in the list of pending signal actions */
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while ((sigq = (FAR sigq_t*)sq_remfirst(&stcb->sigpendactionq)) != NULL)
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{
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sig_releasependingsigaction(sigq);
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}
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/* Deallocate all entries in the list of posted signal actions */
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while ((sigq = (FAR sigq_t*)sq_remfirst(&stcb->sigpostedq)) != NULL)
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{
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sig_releasependingsigaction(sigq);
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}
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/* Misc. signal-related clean-up */
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stcb->sigprocmask = ALL_SIGNAL_SET;
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stcb->sigwaitmask = NULL_SIGNAL_SET;
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}
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/************************************************************************
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* Name: sig_release
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*
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* Description:
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* Deallocate all signal-related lists in a group. This function is
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* called only when the last thread leaves the group. The caller is
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* expected to have assured the critical section necessary to perform
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* this action.
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*
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************************************************************************/
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void sig_release(FAR struct task_group_s *group)
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{
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FAR sigpendq_t *sigpend;
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/* Deallocate all entries in the list of pending signals */
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while ((sigpend = (FAR sigpendq_t*)sq_remfirst(&group->sigpendingq)) != NULL)
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{
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sig_releasependingsignal(sigpend);
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}
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}
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