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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [posix/] [include/] [aio.h] - Rev 318
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/* aio.h * * $Id: aio.h,v 1.2 2001-09-27 11:59:13 chris Exp $ */ #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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