73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
/****************************************************************************
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* sched/signal/sig_findaction.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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/sched.h>
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#include <nuttx/spinlock.h>
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#include "signal/signal.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxsig_find_action
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*
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* Description:
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* Allocate a new element for a signal queue
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*
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****************************************************************************/
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FAR sigactq_t *nxsig_find_action(FAR struct task_group_s *group, int signo)
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{
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FAR sigactq_t *sigact = NULL;
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irqstate_t flags;
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/* Verify the caller's sanity */
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if (group)
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{
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/* Sigactions can only be assigned to the currently executing
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* thread. So, a simple lock ought to give us sufficient
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* protection.
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*/
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flags = spin_lock_irqsave(NULL);
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/* Search the list for a sigaction on this signal */
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for (sigact = (FAR sigactq_t *)group->tg_sigactionq.head;
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((sigact) && (sigact->signo != signo));
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sigact = sigact->flink);
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spin_unlock_irqrestore(NULL, flags);
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}
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return sigact;
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}
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