c9752dfb87
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5564 42af7a65-404d-4744-a932-0658087f49c3
136 lines
4.6 KiB
C
136 lines
4.6 KiB
C
/*****************************************************************************
|
|
* sched/group_signal.c
|
|
*
|
|
* Copyright (C) 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 <sched.h>
|
|
#include <assert.h>
|
|
#include <signal.h>
|
|
#include <debug.h>
|
|
|
|
#include "sig_internal.h"
|
|
|
|
#if defined(HAVE_TASK_GROUP) && !defined(CONFIG_DISABLE_SIGNALS)
|
|
|
|
/*****************************************************************************
|
|
* Pre-processor Definitions
|
|
*****************************************************************************/
|
|
|
|
/*****************************************************************************
|
|
* Private Types
|
|
*****************************************************************************/
|
|
|
|
/*****************************************************************************
|
|
* Private Data
|
|
*****************************************************************************/
|
|
|
|
/*****************************************************************************
|
|
* Private Functions
|
|
*****************************************************************************/
|
|
|
|
/*****************************************************************************
|
|
* Public Functions
|
|
*****************************************************************************/
|
|
|
|
/*****************************************************************************
|
|
* Name: group_signal
|
|
*
|
|
* Description:
|
|
* Send a signal to every member of the group to which task belongs.
|
|
*
|
|
* Parameters:
|
|
* tcb - The tcb of one task in the task group that needs to be signalled.
|
|
*
|
|
* Return Value:
|
|
* 0 (OK) on success; a negated errno value on failure.
|
|
*
|
|
* Assumptions:
|
|
* Called during task terminatino in a safe context. No special precautions
|
|
* are required here.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
int group_signal(FAR _TCB *tcb, FAR siginfo_t *info)
|
|
{
|
|
#ifdef HAVE_GROUP_MEMBERS
|
|
FAR struct task_group_s *group;
|
|
FAR _TCB *gtcb;
|
|
int i;
|
|
|
|
DEBUGASSERT(tcb && tcb->group && info);
|
|
group = tcb->group;
|
|
|
|
/* Make sure that pre-emption is disabled to that we signal all of teh
|
|
* members of the group before any of them actually run.
|
|
*/
|
|
|
|
sched_lock();
|
|
|
|
/* Send the signal to each member of the group */
|
|
|
|
for (i = 0; i < group->tg_nmembers; i++)
|
|
{
|
|
gtcb = sched_gettcb(group->tg_members[i]);
|
|
DEBUGASSERT(gtcb);
|
|
if (gtcb)
|
|
{
|
|
/* Use the sig_received interface so that it does not muck with
|
|
* the siginfo_t.
|
|
*/
|
|
|
|
#ifdef CONFIG_DEBUG
|
|
int ret = sig_received(gtcb, info);
|
|
DEBUGASSERT(ret == 0);
|
|
#else
|
|
(void)sig_received(gtcb, info);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/* Re-enable pre-emption an return success */
|
|
|
|
sched_unlock();
|
|
return OK;
|
|
#else
|
|
return sig_received(tcb, info);
|
|
#endif
|
|
}
|
|
|
|
#endif /* HAVE_TASK_GROUP && !CONFIG_DISABLE_SIGNALS */
|