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NAME

       io_prep_pwrite - Set up iocb for asynchronous writes

SYNOPSYS

       #include <errno.h>

       #include <libaio.h>

       inline void io_prep_pwrite(struct iocb *iocb, int fd, void *buf, size_t count, long long offset);

       struct iocb {
            void      *data;
            unsigned  key;
            short          aio_lio_opcode;
            short          aio_reqprio;
            int       aio_fildes;
       };

DESCRIPTION

       io_prep_write  is  a  convenicence  function  for  setting  up parallel
       writes.

       The first  iocb->u.c.nbytes  =  count  bytes  of  the  file  for  which
       iocb->aio_fildes  =  fd  is  a  descriptor  are written from the buffer
       starting at iocb->u.c.buf  =  buf.   Writing  starts  at  the  absolute
       position ioc->u.c.offset = offset in the file.

       This  function  returns  immediately.  To  schedule  the operation, the
       function io_submit must be called.

       Simultaneous  asynchronous  operations  using  the  same  iocb  produce
       undefined results.

RETURN VALUES

       None.

ERRORS

       None.

SEE ALSO

       io(3),  io_cancel(3),  io_fsync(3),  io_getevents(3), io_prep_fsync(3),
       io_prep_pread(3),        io_queue_init(3),         io_queue_release(3),
       io_queue_run(3),  io_queue_wait(3),  io_set_callback(3),  io_submit(3),
       errno(3).



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