aio.h, aio - asynchronous input and output
The <aio.h> header defines the aiocb structure
which includes the following members:
int aio_fildes file descriptor
off_t aio_offset file offset
volatile void* aio_buf location of buffer
size_t aio_nbytes length of transfer
int aio_reqprio request priority offset
struct sigevent aio_sigevent notification type
int aio_lio_opcode listio operation
This header also includes the following constants:
AIO_ALLDONE
A return value indicating that none of the requested
operations could be canceled since they are already complete.
AIO_CANCELED
A return value indicating that all requested operations
have been canceled.
AIO_NOTCANCELED
A return value indicating that some of the requested
operations could not be canceled since they are in progress.
LIO_NOP
A
lio_listio(3C) element operation option
indicating that no transfer is requested.
LIO_NOWAIT
A lio_listio() synchronization operation
indicating that the calling thread is to continue execution while the
lio_listio() operation is being performed, and notification is to be
given when the operation is complete.
LIO_READ
A lio_listio() element operation option requesting
a read.
LIO_WAIT
A lio_listio() synchronization operation
indicating that the calling thread is to suspend until the lio_listio()
operation is complete.
LIO_WRITE
A lio_listio() element operation option requesting
a write.