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/****************************************************************************
* examples/ostest/aio.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 <stdbool.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <fcntl.h>
#include <aio.h>
#include <errno.h>
#include "ostest.h"
#ifdef CONFIG_LIBC_AIO
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define AIO_RDBUFFER_SIZE 128
#define AIO_WRBUFFER1_SIZE sizeof(g_wrbuffer1)
#define AIO_WRBUFFER2_SIZE sizeof(g_wrbuffer2)
#define AIO_NCTRLBLKS 5
#define AIO_FILEPATH CONFIG_EXAMPLES_OSTEST_AIOPATH "/aio_test.dat"
/****************************************************************************
* Private Data
****************************************************************************/
/* Constant write buffers */
static const char g_wrbuffer1[] = "This is write buffer #1\n";
static const char g_wrbuffer2[] = "This second write buffer is this line\n";
static char g_rdbuffer[AIO_RDBUFFER_SIZE];
/* AIO control blocks: write, nop, write, NULL, read */
static struct aiocb g_aiocbs[AIO_NCTRLBLKS-1];
static struct aiocb *g_aiocb[AIO_NCTRLBLKS] =
{
&g_aiocbs[0], &g_aiocbs[1], &g_aiocbs[2], NULL, &g_aiocbs[3]
};
static FAR void * const g_buffers[AIO_NCTRLBLKS] =
{
(FAR void *)g_wrbuffer1,
(FAR void *)NULL,
(FAR void *)g_wrbuffer2,
(FAR void *)NULL,
(FAR void *)g_rdbuffer
};
static const FAR uint8_t g_offsets[AIO_NCTRLBLKS] =
{
0, 0, AIO_WRBUFFER1_SIZE, 0, 0
};
static const FAR uint8_t g_nbytes[AIO_NCTRLBLKS] =
{
AIO_WRBUFFER1_SIZE, 0, AIO_WRBUFFER1_SIZE, 0, AIO_RDBUFFER_SIZE
};
static const FAR uint8_t g_opcode[AIO_NCTRLBLKS] =
{
LIO_WRITE, LIO_NOP, LIO_WRITE, LIO_NOP, LIO_READ
};
static int g_fildes;
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
static void init_aiocb(bool signal)
{
FAR struct aiocb *aiocbp;
int i;
memset(g_aiocbs, 0xff, (AIO_NCTRLBLKS-1)*sizeof(struct aiocb));
memset(g_rdbuffer, 0xff, AIO_RDBUFFER_SIZE);
for (i = 0; i < AIO_NCTRLBLKS; i++)
{
aiocbp = g_aiocb[i];
if (aiocbp)
{
aiocbp->aio_sigevent.sigev_notify = signal ? SIGEV_SIGNAL : SIGEV_NONE;
aiocbp->aio_sigevent.sigev_signo = SIGUSR1;
aiocbp->aio_buf = g_buffers[i];
aiocbp->aio_offset = (off_t)g_offsets[i];
aiocbp->aio_nbytes = (size_t)g_nbytes[i];
aiocbp->aio_fildes = g_fildes;
aiocbp->aio_reqprio = 0;
aiocbp->aio_lio_opcode = g_opcode[i];
}
}
}
static int check_done(void)
{
FAR struct aiocb *aiocbp;
int i;
/* Check each entry in the list. Break out of the loop if any entry
* has not completed.
*/
for (i = 0; i < AIO_NCTRLBLKS; i++)
{
/* Skip over NULL entries */
aiocbp = g_aiocb[i];
if (aiocbp)
{
/* Check if the I/O has completed */
printf("%d. result = %d\n", i, aiocbp->aio_result);
if (aiocbp->aio_result == -EINPROGRESS)
{
/* No.. return -EINPROGRESS */
printf(" --- NOT finished ---\n");
return -EINPROGRESS;
}
/* Check for an I/O error */
else if (aiocbp->aio_result < 0)
{
printf(" --- Failed I/O transfer ---\n");
}
}
}
/* All of the I/Os have completed */
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
void aio_test(void)
{
int ret;
/* Case 1: Poll for transfer complete */
printf("AIO test case 1: Poll for transfer complete\n");
g_fildes = open(AIO_FILEPATH, O_RDWR|O_CREAT|O_TRUNC);
if (g_fildes < 0)
{
printf("aio_test: Failed to open %s: %d\n", AIO_FILEPATH, errno);
return;
}
init_aiocb(false);
ret = lio_listio(LIO_NOWAIT, g_aiocb, AIO_NCTRLBLKS, NULL);
if (ret < 0)
{
printf("aio_test: lio_listio failed: %d\n", errno);
return;
}
do
{
sleep(1);
ret = check_done();
}
while (ret < 0);
close(g_fildes);
g_fildes = -1;
/* Case 2: Use aio_suspend() until complete */
/* REVISIT: Not yet implemented */
/* Case 3: Use individual signals */
/* REVISIT: Not yet implemented */
}
#endif /* CONFIG_LIBC_AIO */
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