Copyright (C) 2024 Jens Axboe <axboe@kernel.dk>

SPDX-License-Identifier: LGPL-2.0-or-later

io_uring_wait_cqes_min_timeout - wait for completions with both batch and normal timeout

 #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 ");" 

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:

.EX 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.

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. 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)