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#ifndef __BS_AIO_H
#define __BS_AIO_H
/* this file is a workaround */
/*
* eventfd-aio-test by Davide Libenzi (test app for eventfd hooked into KAIO)
* Copyright (C) 2007 Davide Libenzi
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Davide Libenzi <davidel@xmailserver.org>
*
*/
enum {
IOCB_CMD_PREAD = 0,
IOCB_CMD_PWRITE = 1,
IOCB_CMD_FSYNC = 2,
IOCB_CMD_FDSYNC = 3,
/* These two are experimental.
* IOCB_CMD_PREADX = 4,
* IOCB_CMD_POLL = 5,
*/
IOCB_CMD_NOOP = 6,
IOCB_CMD_PREADV = 7,
IOCB_CMD_PWRITEV = 8,
};
#define IOCB_FLAG_RESFD (1 << 0)
#if defined(__LITTLE_ENDIAN)
#define PADDED(x, y) x, y
#elif defined(__BIG_ENDIAN)
#define PADDED(x, y) y, x
#else
#error edit for your odd byteorder.
#endif
typedef unsigned long io_context_t;
struct io_event {
uint64_t data; /* the data field from the iocb */
uint64_t obj; /* what iocb this event came from */
int64_t res; /* result code for this event */
int64_t res2; /* secondary result */
};
struct iocb {
/* these are internal to the kernel/libc. */
uint64_t aio_data; /* data to be returned in event's data */
int32_t PADDED(aio_key, aio_reserved1);
/* the kernel sets aio_key to the req # */
/* common fields */
uint16_t aio_lio_opcode; /* see IOCB_CMD_ above */
int16_t aio_reqprio;
int32_t aio_fildes;
uint64_t aio_buf;
uint64_t aio_nbytes;
int64_t aio_offset;
/* extra parameters */
uint64_t aio_reserved2; /* TODO: use this for a (struct sigevent *) */
/* flags for the "struct iocb" */
int32_t aio_flags;
/*
* if the IOCB_FLAG_RESFD flag of "aio_flags" is set, this is an
* eventfd to signal AIO readiness to
*/
int32_t aio_resfd;
}; /* 64 bytes */
static inline int io_setup(unsigned nr_reqs, io_context_t *ctx)
{
return syscall(__NR_io_setup, nr_reqs, ctx);
}
static inline long io_destroy(io_context_t ctx)
{
return syscall(__NR_io_destroy, ctx);
}
static inline int io_submit(io_context_t ctx, long n, struct iocb **paiocb)
{
return syscall(__NR_io_submit, ctx, n, paiocb);
}
static inline long io_cancel(io_context_t ctx, struct iocb *aiocb,
struct io_event *res)
{
return syscall(__NR_io_cancel, ctx, aiocb, res);
}
static inline long io_getevents(io_context_t ctx, long min_nr, long nr,
struct io_event *events, struct timespec *tmo)
{
return syscall(__NR_io_getevents, ctx, min_nr, nr, events, tmo);
}
static inline int eventfd(int count)
{
return syscall(__NR_eventfd, count);
}
#endif
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