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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [posix/] [include/] [aio.h] - Blame information for rev 484

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/* aio.h
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 *
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 *  $Id: aio.h,v 1.2 2001-09-27 11:59:13 chris Exp $
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 */
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#ifndef __POSIX_ASYNCHRONOUS_IO_h
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#define __POSIX_ASYNCHRONOUS_IO_h
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <sys/features.h>
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#if defined(_POSIX_ASYNCHRONOUS_IO)
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/*
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 *  6.7.1 Data Definitions for Asynchronous Input and Output,
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 *        P1003.1b-1993, p. 151
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 */
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#include <sys/types.h>
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#include <signal.h>
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#include <time.h>
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#include <fcntl.h>
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/*
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 *  6.7.1.2 Manifest Constants, P1003.1b-1993, p. 153
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 */
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#define AIO_CANCELED    0 /* all requested operations have been canceled */
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#define AIO_NOTCANCELED 1 /* some of the operations could not be canceled */
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                          /*   since they are in progress */
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#define AIO_ALLDONE     2 /* none of the requested operations could be */
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                          /*   canceled since they are already complete */
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/* lio_listio() options */
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#define LIO_WAIT        0 /* calling process is to suspend until the */
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                          /*   operation is complete */
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#define LIO_NOWAIT      1 /* calling process is to continue execution while */
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                          /*   the operation is performed and no notification */
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                          /*   shall be given when the operation is completed */
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#define LIO_READ        2 /* request a read() */
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#define LIO_WRITE       3 /* request a write() */
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#define LIO_NOP         4 /* no transfer is requested */
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/*
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 *  6.7.1.1 Asynchronous I/O Control Block, P1003.1b-1993, p. 151
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 */
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struct aiocb {
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  int             aio_fildes;     /* File descriptor */
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  off_t           aio_offset;     /* File offset */
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  volatile void  *aio_buf;        /* Location of buffer */
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  size_t          aio_nbytes;     /* Length of transfer */
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  int             aio_reqprio;    /* Request priority offset */
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  struct sigevent aio_sigevent;   /* Signal number and value */
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  int             aoi_lio_opcode; /* Operation to be performed */
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};
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/*
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 *  6.7.2 Asynchronous Read, P1003.1b-1993, p. 154
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 */
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int aio_read(
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  struct aiocb  *aiocbp
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);
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/*
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 *  6.7.3 Asynchronous Write, P1003.1b-1993, p. 155
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 */
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int aio_write(
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  struct aiocb  *aiocbp
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);
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/*
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 *  6.7.4 List Directed I/O, P1003.1b-1993, p. 158
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 */
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int lio_listio(
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  int                    mode,
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  struct aiocb  * const  list[],
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  int                    nent,
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  struct sigevent       *sig
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);
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/*
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 *  6.7.5 Retrieve Error of Asynchronous I/O Operation, P1003.1b-1993, p. 161
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 */
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int aio_error(
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  const struct aiocb  *aiocbp
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);
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/*
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 *  6.7.6 Retrieve Return Status of Asynchronous I/O Operation,
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 *        P1003.1b-1993, p. 162
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 */
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int aio_return(
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  const struct aiocb  *aiocbp
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);
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/*
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 *  6.7.7 Cancel Asynchronous I/O Operation, P1003.1b-1993, p. 163
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 */
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int aio_cancel(
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  int            filedes,
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  struct aiocb  *aiocbp
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);
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/*
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 *  6.7.7 Wait for Asynchronous I/O Request, P1003.1b-1993, p. 164
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 */
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int aio_suspend(
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  struct aiocb  * const   list[],
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  int                     nent,
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  const struct timespec  *timeout
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);
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#if defined(_POSIX_SYNCHRONIZED_IO)
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/*
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 *  6.7.9 Asynchronous File Synchronization, P1003.1b-1993, p. 166
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 */
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int aio_fsync(
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  int            op,
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  struct aiocb  *aiocbp
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);
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#endif /* _POSIX_SYNCHRONIZED_IO */
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#endif /* _POSIX_ASYNCHRONOUS_IO */
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#ifdef __cplusplus
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}
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#endif
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#endif
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/* end of include file */

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