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/****************************************************************************
* libc/aio/aio_signal.c
*
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <signal.h>
#include <aio.h>
#include <assert.h>
#include "aio/aio.h"
#ifndef CONFIG_LIBC_AIO
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Variables
****************************************************************************/
/****************************************************************************
* Public Variables
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: aio_signal
*
* Description:
* Signal the client that an I/O has completed.
*
* Input Parameters:
* aiocbp - Pointer to the asynchronous I/O state structure that includes
* information about how to signal the client
*
* Returned Value:
* Zero (OK) if the client was successfully signalled. Otherwise, a
* negated errno value is returned.
*
* Assumptions:
* This function runs only in the context of the worker thread.
*
****************************************************************************/
int aio_signal(FAR struct aiocb *aiocbp)
{
int errcode;
int status;
int ret;
DEBUGASSERT(aiocbp);
ret = OK; /* Assume success */
/* Signal the client */
if (aiocbp->aio_sigevent.sigev_notify == SIGEV_SIGNAL)
{
#ifdef CONFIG_CAN_PASS_STRUCTS
status = sigqueue(aiocbp->aio_pid, aiocbp->aio_sigevent.sigev_signo,
aiocbp->aio_sigevent.sigev_value);
#else
status = sigqueue(aiocbp->aio_pid, aiocbp->aio_sigevent.sigev_sign,
aiocbp->aio_sigevent.sigev_value.sival_ptr);
#endif
if (ret < 0)
{
errcode = get_errno();
fdbg("ERROR: sigqueue failed: %d\n", errcode);
ret = ERROR;
}
}
/* Send the poll signal in any event in case the caller is waiting
* on sig_suspend();
*/
status = kill(aiocbp->aio_pid, SIGPOLL);
if (status && ret == OK)
{
errcode = get_errno();
fdbg("ERROR: kill failed: %d\n", errcode);
ret = ERROR;
}
/* Make sure that errno is set correctly on return */
if (ret < 0)
{
set_errno(errcode);
return ERROR;
}
return OK;
}
#endif /* CONFIG_LIBC_AIO */
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