io_prep_pwrite

Section: Linux (3) Updated: 2009-06-10 Local index Up

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