File:
[ELWIX - Embedded LightWeight unIX -] /
libaitio /
src /
aio.c
Revision
1.9:
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Sat Feb 8 22:06:17 2014 UTC (10 years, 8 months ago) by
misho
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MAIN
CVS tags:
io7_4,
io7_3,
io7_2,
io7_1,
io7_0,
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version 6.9
/*************************************************************************
* (C) 2010 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
* by Michael Pounov <misho@elwix.org>
*
* $Author: misho $
* $Id: aio.c,v 1.9 2014/02/08 22:06:17 misho Exp $
*
**************************************************************************
The ELWIX and AITNET software is distributed under the following
terms:
All of the documentation and software included in the ELWIX and AITNET
Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
Copyright 2004 - 2014
by Michael Pounov <misho@elwix.org>. All rights reserved.
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. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by Michael Pounov <misho@elwix.org>
ELWIX - Embedded LightWeight unIX and its contributors.
4. Neither the name of AITNET 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 AITNET 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 REGENTS 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.
*/
#include "global.h"
/* default AIO completion request timeout */
struct timespec aiots = { 10, 0 };
/*
* io_rread() - Raw VFS read function
*
* @fd = File handle
* @buf = Read buffer
* @nbytes = Read buffer size
* @offset = Read from position, if -1 read nbytes from current position
* @update = Update file handle position !0
* return: -1 error or !=-1 readed bytes
*/
int
io_rread(int fd, void * __restrict buf, size_t nbytes, off_t offset, int update)
{
int ret;
#ifdef AIO_OPS
off_t old = 0;
struct aiocb acb, *racb;
#endif
if (!buf) {
io_SetErr(EINVAL, "Invalid arguments");
return -1;
}
if (!nbytes)
return 0;
if (offset == -1) {
offset = lseek(fd, 0, SEEK_CUR);
if (offset == -1) {
LOGERR;
return -1;
}
}
#ifdef AIO_OPS
/* This made for generate EOF for file */
if (!update && (old = lseek(fd, 0, SEEK_CUR)) == -1) {
LOGERR;
return -1;
}
if (offset >= lseek(fd, 0, SEEK_END))
return 0;
if (!update)
lseek(fd, old, SEEK_SET);
memset(buf, 0, nbytes);
memset(&acb, 0, sizeof acb);
acb.aio_fildes = fd;
acb.aio_nbytes = nbytes;
acb.aio_buf = buf;
acb.aio_offset = offset;
if (aio_read(&acb) == -1) {
LOGERR;
return -1;
}
#if 0
while (aio_error(&acb) == EINPROGRESS);
ret = aio_return(&acb);
#endif
ret = aio_waitcomplete(&racb, &aiots);
if (ret == -1) {
LOGERR;
return -1;
}
#else
ret = pread(fd, buf, nbytes, offset);
if (ret == -1) {
LOGERR;
return -1;
}
#endif
if (update)
lseek(fd, offset + ret, SEEK_SET);
return ret;
}
/*
* io_rwrite() - Raw VFS write function
*
* @fd = File handle
* @buf = Write buffer
* @nbytes = Write bytes from buffer
* @offset = Write at position, if -1 write nbytes from current position
* @update = Update file handle position !0
* return: -1 error or !=-1 written bytes
*/
int
io_rwrite(int fd, void * __restrict buf, size_t nbytes, off_t offset, int update)
{
int ret;
#ifdef AIO_OPS
struct aiocb acb, *racb;
#endif
if (!buf) {
io_SetErr(EINVAL, "Invalid arguments");
return -1;
}
if (!nbytes)
return 0;
if (offset == -1) {
offset = lseek(fd, 0, SEEK_CUR);
if (offset == -1) {
LOGERR;
return -1;
}
}
#ifdef AIO_OPS
memset(&acb, 0, sizeof acb);
acb.aio_fildes = fd;
acb.aio_nbytes = nbytes;
acb.aio_buf = buf;
acb.aio_offset = offset;
if (aio_write(&acb) == -1) {
LOGERR;
return -1;
}
#if 0
while (aio_error(&acb) == EINPROGRESS);
ret = aio_return(&acb);
#endif
ret = aio_waitcomplete(&racb, &aiots);
if (ret == -1) {
LOGERR;
return -1;
}
#else
ret = pwrite(fd, buf, nbytes, offset);
if (ret == -1) {
LOGERR;
return -1;
}
#endif
if (update)
lseek(fd, offset + ret, SEEK_SET);
return ret;
}
#ifdef AIO_OPS
/*
* io_aiobulk() - AIO bulk R/W function
*
* @mode = Bulk wait mode
* @acbs = List of aiocb structures
* @nacb = Number of aiocb in list
* @sig = Event for completed operations, may be =NULL
* return: -1 error or 0 ok
*/
int
io_aiobulk(int mode, struct aiocb ** __restrict acbs, int nacb, struct sigevent *sig)
{
int ret;
if (!acbs) {
io_SetErr(EINVAL, "Invalid arguments");
return -1;
}
if (!nacb)
return 0;
if ((ret = lio_listio(mode, acbs, nacb, sig)) == -1)
LOGERR;
return ret;
}
#endif
/*
* io_rreadv() - Raw VFS bulk read function
*
* @fd = File handle
* @bufs = Read buffers
* @nbufs = Number of read buffers
* @offset = Read from position, if -1 read nbytes from current position
* @update = Update file handle position !0
* return: -1 error or !=-1 readed bytes
*/
int
io_rreadv(int fd, struct iovec * __restrict bufs, int nbufs, off_t offset, int update)
{
int ret;
#ifdef AIO_OPS
register int i;
off_t off, old = 0;
struct aiocb **acb;
#endif
if (!bufs) {
io_SetErr(EINVAL, "Invalid arguments");
return -1;
}
if (!nbufs)
return 0;
if (offset == -1) {
offset = lseek(fd, 0, SEEK_CUR);
if (offset == -1) {
LOGERR;
return -1;
}
}
#ifdef AIO_OPS
/* This made for generate EOF for file */
if (!update && (old = lseek(fd, 0, SEEK_CUR)) == -1) {
LOGERR;
return -1;
}
if (offset >= lseek(fd, 0, SEEK_END))
return 0;
if (!update)
lseek(fd, old, SEEK_SET);
acb = e_calloc(sizeof(void*), nbufs);
if (!acb) {
LOGERR;
return -1;
}
memset(acb, 0, sizeof(void*) * nbufs);
for (i = 0, off = offset; i < nbufs; off += bufs[i++].iov_len) {
acb[i] = e_malloc(sizeof(struct aiocb));
if (!acb[i]) {
LOGERR;
for (i = 0; i < nbufs; i++)
if (acb[i])
e_free(acb[i]);
e_free(acb);
return -1;
} else
memset(acb[i], 0, sizeof(struct aiocb));
acb[i]->aio_fildes = fd;
acb[i]->aio_nbytes = bufs[i].iov_len;
acb[i]->aio_buf = bufs[i].iov_base;
acb[i]->aio_offset = off;
acb[i]->aio_lio_opcode = LIO_READ;
}
ret = io_aiobulk(LIO_WAIT, acb, nbufs, NULL);
if (ret == -1) {
LOGERR;
for (i = 0; i < nbufs; i++)
if (acb[i])
e_free(acb[i]);
e_free(acb);
return -1;
}
for (i = 0; i < nbufs; i++) {
bufs[i].iov_len = aio_return(acb[i]);
offset += bufs[i].iov_len;
if (acb[i])
e_free(acb[i]);
}
e_free(acb);
#else
ret = preadv(fd, bufs, nbufs, offset);
if (ret == -1) {
LOGERR;
return -1;
} else
offset += ret;
#endif
if (update)
lseek(fd, offset, SEEK_SET);
return ret;
}
/*
* io_rwritev() - Raw VFS bulk write function
*
* @fd = File handle
* @bufs = Write buffers
* @nbufs = Number of write buffers
* @offset = Write to position, if -1 write nbytes to current position
* @update = Update file handle position !0
* return: -1 error or !=-1 written bytes
*/
int
io_rwritev(int fd, struct iovec * __restrict bufs, int nbufs, off_t offset, int update)
{
int ret;
#ifdef AIO_OPS
register int i;
struct aiocb **acb;
off_t off;
#endif
if (!bufs) {
io_SetErr(EINVAL, "Invalid arguments");
return -1;
}
if (!nbufs)
return 0;
if (offset == -1) {
offset = lseek(fd, 0, SEEK_CUR);
if (offset == -1) {
LOGERR;
return -1;
}
}
#ifdef AIO_OPS
acb = e_calloc(sizeof(void*), nbufs);
if (!acb) {
LOGERR;
return -1;
} else
memset(acb, 0, sizeof(void*) * nbufs);
for (i = 0, off = offset; i < nbufs; off += bufs[i++].iov_len) {
acb[i] = e_malloc(sizeof(struct aiocb));
if (!acb[i]) {
LOGERR;
for (i = 0; i < nbufs; i++)
if (acb[i])
e_free(acb[i]);
e_free(acb);
return -1;
} else
memset(acb[i], 0, sizeof(struct aiocb));
acb[i]->aio_fildes = fd;
acb[i]->aio_nbytes = bufs[i].iov_len;
acb[i]->aio_buf = bufs[i].iov_base;
acb[i]->aio_offset = off;
acb[i]->aio_lio_opcode = LIO_WRITE;
}
ret = io_aiobulk(LIO_WAIT, acb, nbufs, NULL);
if (ret == -1) {
LOGERR;
for (i = 0; i < nbufs; i++)
if (acb[i])
e_free(acb[i]);
e_free(acb);
return -1;
}
for (i = 0; i < nbufs; i++) {
bufs[i].iov_len = aio_return(acb[i]);
offset += bufs[i].iov_len;
if (acb[i])
e_free(acb[i]);
}
e_free(acb);
#else
ret = pwritev(fd, bufs, nbufs, offset);
if (ret == -1) {
LOGERR;
return -1;
} else
offset += ret;
#endif
if (update)
lseek(fd, offset, SEEK_SET);
return ret;
}
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