NAME

       io_prep_pread - Set up asynchronous read

SYNOPSIS

       #include <errno.h>

       #include <libaio.h>

       inline void io_prep_pread(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_pread()   is   an   inline   convenience   function  designed  to  facilitate  the
       initialization of the iocb for an asynchronous read operation.

       The first iocb->u.c.nbytes = count bytes of the file for which iocb->aio_fildes = fd is  a
       descriptor  are  written to the buffer starting at iocb->u.c.buf = buf.  Reading 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(3)
       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_pwrite(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).