aio_suspend - wait for asynchronous I/O operation or timeout
int aio_suspend(const struct aiocb * const aiocb_list,
int nitems, const struct timespec *timeout);
Link with -lrt.
() function suspends the calling thread until one of the
- One or more of the asynchronous I/O requests in the list aiocb_list
- A signal is delivered.
- timeout is not NULL and the specified time interval has passed.
(For details of the timespec structure, see
argument specifies the number of items in aiocb_list
Each item in the list pointed to by aiocb_list
must be either NULL (and
then is ignored), or a pointer to a control block on which I/O was initiated
(3), or lio_listio
(7) for a description of the aiocb
is supported, this clock is used to measure the
timeout interval (see clock_gettime
If this function returns after completion of one of the I/O requests specified
, 0 is returned. Otherwise, -1 is returned, and
is set to indicate the error.
- The call timed out before any of the indicated operations had
- The call was ended by signal (possibly the completion signal of one of the
operations we were waiting for); see signal(7).
- aio_suspend() is not implemented.
() function is available since glibc 2.1.
For an explanation of the terms used in this section, see attributes
One can achieve polling by using a non-NULL timeout
that specifies a zero
If one or more of the asynchronous I/O operations specified in aiocb_list
has already completed at the time of the call to aio_suspend
the call returns immediately.
To determine which I/O operations have completed after a successful return from
(), use aio_error
(3) to scan the list of aiocb
structures pointed to by aiocb_list
The glibc implementation of aio_suspend
() is not async-signal-safe, in
violation of the requirements of POSIX.1.