io_prep_pwrite
Section: Linux (3)
Updated: 2002-09-12
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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)