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- /****************************************************************************
- * sched/wqueue/work_signal.c
- *
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership. The
- * ASF licenses this file to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the
- * License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <signal.h>
- #include <errno.h>
- #include <nuttx/wqueue.h>
- #include <nuttx/signal.h>
- #include "wqueue/wqueue.h"
- #ifdef CONFIG_SCHED_WORKQUEUE
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: work_signal
- *
- * Description:
- * Signal the worker thread to process the work queue now. This function
- * is used internally by the work logic but could also be used by the
- * user to force an immediate re-assessment of pending work.
- *
- * Input Parameters:
- * qid - The work queue ID
- *
- * Returned Value:
- * Zero (OK) on success, a negated errno value on failure
- *
- ****************************************************************************/
- int work_signal(int qid)
- {
- FAR struct kwork_wqueue_s *work;
- int threads;
- int i;
- /* Get the process ID of the worker thread */
- #ifdef CONFIG_SCHED_HPWORK
- if (qid == HPWORK)
- {
- work = (FAR struct kwork_wqueue_s *)&g_hpwork;
- threads = CONFIG_SCHED_HPNTHREADS;
- }
- else
- #endif
- #ifdef CONFIG_SCHED_LPWORK
- if (qid == LPWORK)
- {
- work = (FAR struct kwork_wqueue_s *)&g_lpwork;
- threads = CONFIG_SCHED_LPNTHREADS;
- }
- else
- #endif
- {
- return -EINVAL;
- }
- /* Find an IDLE worker thread */
- for (i = 0; i < threads; i++)
- {
- /* Is this worker thread busy? */
- if (!work->worker[i].busy)
- {
- /* No.. select this thread */
- break;
- }
- }
- /* If all of the IDLE threads are busy, then just return successfully */
- if (i >= threads)
- {
- return OK;
- }
- /* Otherwise, signal the first IDLE thread found */
- return nxsig_kill(work->worker[i].pid, SIGWORK);
- }
- #endif /* CONFIG_SCHED_WORKQUEUE */
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