111 lines
3.6 KiB
C
111 lines
3.6 KiB
C
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/****************************************************************************
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* fs/aio/aio_queue.c
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*
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* Copyright (C) 2014 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 <aio.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/wqueue.h>
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#include "aio/aio.h"
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#ifdef CONFIG_FS_AIO
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: aio_queue
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*
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* Description:
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* Schedule the asynchronous I/O on the low priority work queue
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*
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* Input Parameters:
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* arg - Worker argument. In this case, a pointer to an instance of
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* struct aiocb cast to void *.
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*
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* Returned Value:
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* Zero (OK) on success. Otherwise, -1 is returned and the errno is set
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* appropriately.
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*
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****************************************************************************/
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int aio_queue(FAR struct aio_container_s *aioc, worker_t worker)
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{
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int ret;
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#ifdef CONFIG_PRIORITY_INHERITANCE
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/* Prohibit context switches until we complete the queuing */
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sched_lock();
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/* Make sure that the low-priority worker thread is running at at least
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* the priority specified for this action.
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*/
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lpwork_boostpriority(aioc->aioc_prio);
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#endif
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/* Schedule the work on the low priority worker thread */
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ret = work_queue(LPWORK, &aioc->aioc_work, worker, aioc, 0);
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if (ret < 0)
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{
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FAR struct aiocb *aiocbp = aioc->aioc_aiocbp;
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DEBUGASSERT(aiocbp);
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aiocbp->aio_result = ret;
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set_errno(-ret);
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ret = ERROR;
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}
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#ifdef CONFIG_PRIORITY_INHERITANCE
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/* Now the low-priority work queue might run at its new priority */
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sched_unlock();
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#endif
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return ret;
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}
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#endif /* CONFIG_FS_AIO */
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