112 lines
3.0 KiB
C
112 lines
3.0 KiB
C
/****************************************************************************
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* sched/wqueue/work_signal.c
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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 <signal.h>
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#include <errno.h>
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#include <nuttx/wqueue.h>
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#include <nuttx/signal.h>
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#include "wqueue/wqueue.h"
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#ifdef CONFIG_SCHED_WORKQUEUE
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: work_signal
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*
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* Description:
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* Signal the worker thread to process the work queue now. This function
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* is used internally by the work logic but could also be used by the
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* user to force an immediate re-assessment of pending work.
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*
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* Input Parameters:
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* qid - The work queue ID
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*
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* Returned Value:
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* Zero (OK) on success, a negated errno value on failure
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*
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****************************************************************************/
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int work_signal(int qid)
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{
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FAR struct kwork_wqueue_s *work;
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int threads;
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int i;
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/* Get the process ID of the worker thread */
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#ifdef CONFIG_SCHED_HPWORK
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if (qid == HPWORK)
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{
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work = (FAR struct kwork_wqueue_s *)&g_hpwork;
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threads = CONFIG_SCHED_HPNTHREADS;
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}
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else
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#endif
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#ifdef CONFIG_SCHED_LPWORK
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if (qid == LPWORK)
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{
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work = (FAR struct kwork_wqueue_s *)&g_lpwork;
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threads = CONFIG_SCHED_LPNTHREADS;
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}
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else
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#endif
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{
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return -EINVAL;
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}
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/* Find an IDLE worker thread */
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for (i = 0; i < threads; i++)
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{
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/* Is this worker thread busy? */
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if (!work->worker[i].busy)
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{
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/* No.. select this thread */
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break;
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}
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}
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/* If all of the IDLE threads are busy, then just return successfully */
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if (i >= threads)
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{
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return OK;
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}
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/* Otherwise, signal the first IDLE thread found */
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return nxsig_kill(work->worker[i].pid, SIGWORK);
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}
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#endif /* CONFIG_SCHED_WORKQUEUE */
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