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Diffstat (limited to 'libaio-0.3.109/man/io_fsync.3')
| -rw-r--r-- | libaio-0.3.109/man/io_fsync.3 | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/libaio-0.3.109/man/io_fsync.3 b/libaio-0.3.109/man/io_fsync.3 new file mode 100644 index 0000000..53eb63d --- /dev/null +++ b/libaio-0.3.109/man/io_fsync.3 @@ -0,0 +1,82 @@ +./" static inline int io_fsync(io_context_t ctx, struct iocb *iocb, io_callback_t cb, int fd) +./" { +./" io_prep_fsync(iocb, fd); +./" io_set_callback(iocb, cb); +./" return io_submit(ctx, 1, &iocb); +./" } +.TH io_fsync 3 2002-09-12 "Linux 2.4" Linux AIO" +.SH NAME +io_fsync \- Synchronize a file's complete in-core state with that on disk +.SH SYNOPSYS +.nf +.B #include <errno.h> +.sp +.br +.B #include <libaio.h> +.sp +.br +.BI "int io_fsync(io_context_t ctx, struct iocb *iocb, io_callback_t cb, int fd)" +.sp +struct iocb { + void *data; + unsigned key; + short aio_lio_opcode; + short aio_reqprio; + int aio_fildes; +}; +.sp +typedef void (*io_callback_t)(io_context_t ctx, struct iocb *iocb, long res, long res2); +.sp +.fi +.SH DESCRIPTION +When dealing with asynchronous operations it is sometimes necessary to +get into a consistent state. This would mean for AIO that one wants to +know whether a certain request or a group of request were processed. +This could be done by waiting for the notification sent by the system +after the operation terminated, but this sometimes would mean wasting +resources (mainly computation time). +.PP +Calling this function forces all I/O operations operating queued at the +time of the function call operating on the file descriptor +.IR "iocb->io_fildes" +into the synchronized I/O completion state . The +.IR "io_fsync" +function returns +immediately but the notification through the method described in +.IR "io_callback" +will happen only after all requests for this +file descriptor have terminated and the file is synchronized. This also +means that requests for this very same file descriptor which are queued +after the synchronization request are not affected. +.SH "RETURN VALUES" +Returns 0, otherwise returns errno. +.SH ERRORS +.TP +.B EFAULT +.I iocbs +referenced data outside of the program's accessible address space. +.TP +.B EINVAL +.I ctx +refers to an unitialized aio context, the iocb pointed to by +.I iocbs +contains an improperly initialized iocb, +.TP +.B EBADF +The iocb contains a file descriptor that does not exist. +.TP +.B EINVAL +The file specified in the iocb does not support the given io operation. +.SH "SEE ALSO" +.BR io(3), +.BR io_cancel(3), +.BR io_getevents(3), +.BR io_prep_pread(3), +.BR io_prep_pwrite(3), +.BR io_queue_init(3), +.BR io_queue_release(3), +.BR io_queue_run(3), +.BR io_queue_wait(3), +.BR io_set_callback(3), +.BR io_submit(3), +.BR errno(3) |