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Diffstat (limited to 'libaio-0.3.109/man/io_prep_pwrite.3')
| -rw-r--r-- | libaio-0.3.109/man/io_prep_pwrite.3 | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/libaio-0.3.109/man/io_prep_pwrite.3 b/libaio-0.3.109/man/io_prep_pwrite.3 new file mode 100644 index 0000000..68b3500 --- /dev/null +++ b/libaio-0.3.109/man/io_prep_pwrite.3 @@ -0,0 +1,77 @@ +./" static inline void io_prep_pwrite(struct iocb *iocb, int fd, void *buf, size_t count, long long offset) +./" { +./" memset(iocb, 0, sizeof(*iocb)); +./" iocb->aio_fildes = fd; +./" iocb->aio_lio_opcode = IO_CMD_PWRITE; +./" iocb->aio_reqprio = 0; +./" iocb->u.c.buf = buf; +./" iocb->u.c.nbytes = count; +./" iocb->u.c.offset = offset; +./" } +.TH io_prep_pwrite 3 2002-09-12 "Linux 2.4" Linux AIO" +.SH NAME +io_prep_pwrite \- Set up iocb for asynchronous writes +.SH SYNOPSYS +.nf +.B #include <errno.h> +.br +.sp +.B #include <libaio.h> +.br +.sp +.BI "inline void io_prep_pwrite(struct iocb *iocb, int fd, void *buf, size_t count, long long offset) +" +.sp +struct iocb { + void *data; + unsigned key; + short aio_lio_opcode; + short aio_reqprio; + int aio_fildes; +}; +.fi +.SH DESCRIPTION +io_prep_write is a convenicence function for setting up parallel writes. + +The first +.TP +.IR "iocb->u.c.nbytes = count" +bytes of the file for which +.TP +.IR "iocb->aio_fildes = fd" +is a descriptor are written from the buffer +starting at +.TP +.IR "iocb->u.c.buf = buf" +. +.br +Writing starts at the absolute position +.TP +.IR "ioc->u.c.offset = offset" +in the file. +.PP +This function returns immediately . To schedule the operation, the +function +.IR io_submit +must be called. +.PP +Simultaneous asynchronous operations using the same iocb produce +undefined results. +.SH "RETURN VALUES" +None +.SH ERRORS +None +.SH "SEE ALSO" +.BR io(3), +.BR io_cancel(3), +.BR io_fsync(3), +.BR io_getevents(3), +.BR io_prep_fsync(3), +.BR io_prep_pread(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) |