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/* aio.h
*
* $Id$
*/
#ifndef __POSIX_ASYNCHRONOUS_IO_h
#define __POSIX_ASYNCHRONOUS_IO_h
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/features.h>
#if defined(_POSIX_ASYNCHRONOUS_IO)
/*
* 6.7.1 Data Definitions for Asynchronous Input and Output,
* P1003.1b-1993, p. 151
*/
#include <sys/types.h>
#include <signal.h>
#include <time.h>
#include <fcntl.h>
/*
* 6.7.1.2 Manifest Constants, P1003.1b-1993, p. 153
*/
#define AIO_CANCELED 0 /* all requested operations have been canceled */
#define AIO_NOTCANCELED 1 /* some of the operations could not be canceled */
/* since they are in progress */
#define AIO_ALLDONE 2 /* none of the requested operations could be */
/* canceled since they are already complete */
/* lio_listio() options */
#define LIO_WAIT 0 /* calling process is to suspend until the */
/* operation is complete */
#define LIO_NOWAIT 1 /* calling process is to continue execution while */
/* the operation is performed and no notification */
/* shall be given when the operation is completed */
#define LIO_READ 2 /* request a read() */
#define LIO_WRITE 3 /* request a write() */
#define LIO_NOP 4 /* no transfer is requested */
/*
* 6.7.1.1 Asynchronous I/O Control Block, P1003.1b-1993, p. 151
*/
struct aiocb {
int aio_fildes; /* File descriptor */
off_t aio_offset; /* File offset */
volatile void *aio_buf; /* Location of buffer */
size_t aio_nbytes; /* Length of transfer */
int aio_reqprio; /* Request priority offset */
struct sigevent aio_sigevent; /* Signal number and value */
int aoi_lio_opcode; /* Operation to be performed */
};
/*
* 6.7.2 Asynchronous Read, P1003.1b-1993, p. 154
*/
int aio_read(
struct aiocb *aiocbp
);
/*
* 6.7.3 Asynchronous Write, P1003.1b-1993, p. 155
*/
int aio_write(
struct aiocb *aiocbp
);
/*
* 6.7.4 List Directed I/O, P1003.1b-1993, p. 158
*/
int lio_listio(
int mode,
struct aiocb * const list[],
int nent,
struct sigevent *sig
);
/*
* 6.7.5 Retrieve Error of Asynchronous I/O Operation, P1003.1b-1993, p. 161
*/
int aio_error(
const struct aiocb *aiocbp
);
/*
* 6.7.6 Retrieve Return Status of Asynchronous I/O Operation,
* P1003.1b-1993, p. 162
*/
int aio_return(
const struct aiocb *aiocbp
);
/*
* 6.7.7 Cancel Asynchronous I/O Operation, P1003.1b-1993, p. 163
*/
int aio_cancel(
int filedes,
struct aiocb *aiocbp
);
/*
* 6.7.7 Wait for Asynchronous I/O Request, P1003.1b-1993, p. 164
*/
int aio_suspend(
struct aiocb * const list[],
int nent,
const struct timespec *timeout
);
#if defined(_POSIX_SYNCHRONIZED_IO)
/*
* 6.7.9 Asynchronous File Synchronization, P1003.1b-1993, p. 166
*/
int aio_fsync(
int op,
struct aiocb *aiocbp
);
#endif /* _POSIX_SYNCHRONIZED_IO */
#endif /* _POSIX_ASYNCHRONOUS_IO */
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
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