./" static inline void io_prep_pread(struct iocb *iocb, int fd, void *buf, size_t count, long long offset)
./" {
./" memset(iocb, 0, sizeof(*iocb));
./" iocb->aio_fildes = fd;
./" iocb->aio_lio_opcode = IO_CMD_PREAD;
./" iocb->aio_reqprio = 0;
./" iocb->u.c.buf = buf;
./" iocb->u.c.nbytes = count;
./" iocb->u.c.offset = offset;
./" }
NAME
io_prep_pread - Set up asynchronous read
SYNOPSYS
#include <errno.h>
#include <libaio.h>
I 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
R io_prep_pread
is an inline convenience function designed to facilitate the initialization of
the iocb for an asynchronous read operation.
The first
R iocb->u.c.nbytes = count
bytes of the file for which
R iocb->aio_fildes = fd
is a descriptor are written to the buffer
starting at
R iocb->u.c.buf = buf
.
Reading starts at the absolute position
R ioc->u.c.offset = offset
in the file.
This function returns immediately . To schedule the operation, the
function
R io_submit
must be called.
Simultaneous asynchronous operations using the same iocb produce
undefined results.
RETURN VALUES
None
ERRORS
None
SEE ALSO
R io(3),
R io_cancel(3),
R io_fsync(3),
R io_getevents(3),
R io_prep_fsync(3),
R io_prep_pwrite(3),
R io_queue_init(3),
R io_queue_release(3),
R io_queue_run(3),
R io_queue_wait(3),
R io_set_callback(3),
R io_submit(3),
R errno(3)
