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