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138 lines
5.5 KiB
138 lines
5.5 KiB
/**************************************************************************** |
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* sched/work_queue.c |
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* |
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* Copyright (C) 2009-2011 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 <stdint.h> |
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#include <queue.h> |
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#include <assert.h> |
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#include <errno.h> |
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#include <debug.h> |
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#include <nuttx/arch.h> |
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#include <nuttx/clock.h> |
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#include <nuttx/wqueue.h> |
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#include "work_internal.h" |
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#ifdef CONFIG_SCHED_WORKQUEUE |
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/**************************************************************************** |
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* Pre-processor Definitions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Type Declarations |
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****************************************************************************/ |
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/**************************************************************************** |
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* Public Variables |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Variables |
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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: work_queue |
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* |
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* Description: |
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* Queue work to be performed at a later time. All queued work will be |
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* performed on the worker thread of of execution (not the caller's). |
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* |
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* The work structure is allocated by caller, but completely managed by |
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* the work queue logic. The caller should never modify the contents of |
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* the work queue structure; the caller should not call work_queue() |
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* again until either (1) the previous work has been performed and removed |
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* from the queue, or (2) work_cancel() has been called to cancel the work |
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* and remove it from the work queue. |
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* |
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* Input parameters: |
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* qid - The work queue ID (index) |
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* work - The work structure to queue |
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* worker - The worker callback to be invoked. The callback will invoked |
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* on the worker thread of execution. |
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* arg - The argument that will be passed to the workder callback when |
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* int is invoked. |
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* delay - Delay (in clock ticks) from the time queue until the worker |
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* is invoked. Zero means to perform the work immediately. |
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* |
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* Returned Value: |
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* Zero on success, a negated errno on failure |
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* |
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****************************************************************************/ |
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int work_queue(int qid, FAR struct work_s *work, worker_t worker, |
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FAR void *arg, uint32_t delay) |
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{ |
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FAR struct wqueue_s *wqueue = &g_work[qid]; |
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irqstate_t flags; |
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DEBUGASSERT(work != NULL && (unsigned)qid < NWORKERS); |
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/* First, initialize the work structure */ |
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work->worker = worker; /* Work callback */ |
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work->arg = arg; /* Callback argument */ |
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work->delay = delay; /* Delay until work performed */ |
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/* Now, time-tag that entry and put it in the work queue. This must be |
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* done with interrupts disabled. This permits this function to be called |
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* from with task logic or interrupt handlers. |
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*/ |
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flags = irqsave(); |
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work->qtime = clock_systimer(); /* Time work queued */ |
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dq_addlast((FAR dq_entry_t *)work, &wqueue->q); |
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kill(wqueue->pid, SIGWORK); /* Wake up the worker thread */ |
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irqrestore(flags); |
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return OK; |
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} |
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#endif /* CONFIG_SCHED_WORKQUEUE */
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