#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
must be called.
Simultaneous asynchronous operations using the same iocb produce
undefined results.