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163 lines
5.3 KiB
163 lines
5.3 KiB
/***************************************************************************** |
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* sched/group_signal.c |
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* |
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* Copyright (C) 2013 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 <sched.h> |
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#include <assert.h> |
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#include <signal.h> |
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#include <errno.h> |
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#include <debug.h> |
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#include "os_internal.h" |
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#include "group_internal.h" |
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#include "sig_internal.h" |
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#if defined(HAVE_TASK_GROUP) && !defined(CONFIG_DISABLE_SIGNALS) |
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/***************************************************************************** |
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* Pre-processor Definitions |
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*****************************************************************************/ |
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/***************************************************************************** |
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* Private Types |
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*****************************************************************************/ |
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/***************************************************************************** |
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* Private Data |
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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: group_signal |
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* |
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* Description: |
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* Send a signal to every member of the group. |
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* |
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* Parameters: |
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* group - The task group that needs to be signalled. |
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* |
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* Return Value: |
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* 0 (OK) on success; a negated errno value on failure. |
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* |
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* Assumptions: |
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* Called during task terminatino in a safe context. No special precautions |
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* are required here. |
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* |
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*****************************************************************************/ |
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int group_signal(FAR struct task_group_s *group, FAR siginfo_t *info) |
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{ |
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#ifdef HAVE_GROUP_MEMBERS |
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FAR _TCB *gtcb; |
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int i; |
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DEBUGASSERT(group && info); |
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/* Make sure that pre-emption is disabled to that we signal all of teh |
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* members of the group before any of them actually run. |
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*/ |
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sched_lock(); |
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/* Send the signal to each member of the group */ |
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for (i = 0; i < group->tg_nmembers; i++) |
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{ |
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gtcb = sched_gettcb(group->tg_members[i]); |
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DEBUGASSERT(gtcb); |
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if (gtcb) |
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{ |
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/* Use the sig_received interface so that it does not muck with |
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* the siginfo_t. |
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*/ |
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#ifdef CONFIG_DEBUG |
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int ret = sig_received(gtcb, info); |
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DEBUGASSERT(ret == 0); |
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#else |
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(void)sig_received(gtcb, info); |
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#endif |
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} |
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} |
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/* Re-enable pre-emption an return success */ |
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sched_unlock(); |
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return OK; |
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#else |
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return -ENOSYS; |
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#endif |
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} |
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/***************************************************************************** |
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* Name: group_signalmember |
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* |
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* Description: |
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* Send a signal to every member of the group to which task belongs. |
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* |
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* Parameters: |
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* tcb - The tcb of one task in the task group that needs to be signalled. |
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* |
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* Return Value: |
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* 0 (OK) on success; a negated errno value on failure. |
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* |
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* Assumptions: |
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* Called during task terminatino in a safe context. No special precautions |
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* are required here. |
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* |
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*****************************************************************************/ |
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int group_signalmember(FAR _TCB *tcb, FAR siginfo_t *info) |
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{ |
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#ifdef HAVE_GROUP_MEMBERS |
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DEBUGASSERT(tcb); |
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return group_signal(tcb->group, info); |
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#else |
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return sig_received(tcb, info); |
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#endif |
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} |
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#endif /* HAVE_TASK_GROUP && !CONFIG_DISABLE_SIGNALS */
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