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io_prep_pwrite

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).