NAME¶

io_uring_wait_cqes_min_timeout - wait for completions with both batch and normal timeout

SYNOPSIS¶

#include <liburing.h>

int io_uring_wait_cqes_min_timeout(struct io_uring *ring,
                                   struct io_uring_cqe **cqe_ptr,
                                   unsigned wait_nr,
                                   struct __kernel_timespec *ts,
                                   unsigned int min_wait_usec,
                                   sigset_t *sigmask);

DESCRIPTION¶

The io_uring_wait_cqes_min_timeout(3) waits for completions from the submission queue belonging to the ring and waits for wait_nr completion events, or until the timeout ts expires. The completion events are stored in the cqe_ptr array. If non-zero, min_wait_usec denotes a timeout for the wait_nr batch.

The sigmask specifies the set of signals to block. If set, it is equivalent to atomically executing the following calls:

sigset_t origmask;
pthread_sigmask(SIG_SETMASK, &sigmask, &origmask);
ret = io_uring_wait_cqes_min_timeout(ring, cqe, wait_nr, ts, min_wait, NULL);
pthread_sigmask(SIG_SETMASK, &origmask, NULL);

This works like io_uring_submit_and_wait_min_timeout(3) except that it doesn't submit requests. See that man page for a description for how the min timeout waiting works.

Available since 6.12.

RETURN VALUE¶

On success io_uring_wait_cqes_min_timeout(3) returns the 0.On failure it returns -errno. If the kernel doesn't support this functionality, -EINVAL will be returned. See note on the feature flag. The most common failure case is not receiving a completion within the specified timeout, -ETIME is returned in this case.

SEE ALSO¶

io_uring_wait_cqe(3), io_uring_wait_cqes(3), io_uring_wait_cqe_timeout(3), io_uring_wait_cqes(3), io_uring_submit_and_wait_min_timeout(3)