111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
/****************************************************************************
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* fs/aio/aio_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 <sys/types.h>
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#include <sched.h>
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#include <signal.h>
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#include <aio.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/signal.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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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: aio_signal
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*
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* Description:
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* Signal the client that an I/O has completed.
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*
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* Input Parameters:
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* pid - ID of the task to signal
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* aiocbp - Pointer to the asynchronous I/O state structure that includes
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* information about how to signal the client
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*
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* Returned Value:
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* Zero (OK) if the client was successfully signalled. Otherwise, a
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* negated errno value is returned.
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*
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* Assumptions:
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* This function runs only in the context of the worker thread.
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*
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****************************************************************************/
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int aio_signal(pid_t pid, FAR struct aiocb *aiocbp)
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{
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union sigval value;
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int status;
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int ret;
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DEBUGASSERT(aiocbp);
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ret = OK; /* Assume success */
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/* Signal the client */
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ret = nxsig_notification(pid, &aiocbp->aio_sigevent,
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SI_ASYNCIO, &aiocbp->aio_sigwork);
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if (ret < 0)
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{
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ferr("ERROR: nxsig_notification failed: %d\n", ret);
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}
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/* Send the poll signal in any event in case the caller is waiting
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* on sig_suspend();
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*/
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value.sival_ptr = aiocbp;
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status = nxsig_queue(pid, SIGPOLL, value);
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if (status < 0)
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{
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ferr("ERROR: nxsig_queue #2 failed: %d\n", status);
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if (ret >= OK)
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{
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ret = status;
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}
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}
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/* Make sure that errno is set correctly on return */
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if (ret < 0)
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{
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set_errno(-ret);
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return ERROR;
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}
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return OK;
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}
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#endif /* CONFIG_FS_AIO */
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