.\" Copyright (C) 2024 Jens Axboe .\" .\" SPDX-License-Identifier: LGPL-2.0-or-later .\" .TH io_uring_wait_cqes_min_timeout 3 "Feb 13, 2024" "liburing-2.8" "liburing Manual" .SH NAME io_uring_wait_cqes_min_timeout \- wait for completions with both batch and normal timeout .SH SYNOPSIS .nf .B #include .PP .BI "int io_uring_wait_cqes_min_timeout(struct io_uring *" ring "," .BI " struct io_uring_cqe **" cqe_ptr "," .BI " unsigned " wait_nr "," .BI " struct __kernel_timespec *" ts "," .BI " unsigned int " min_wait_usec ", .BI " sigset_t *" sigmask ");" .fi .SH DESCRIPTION .PP The .BR io_uring_wait_cqes_min_timeout (3) waits for completions from the submission queue belonging to the .I ring and waits for .I wait_nr completion events, or until the timeout .I ts expires. The completion events are stored in the .I cqe_ptr array. If non-zero, .I min_wait_usec denotes a timeout for the .I wait_nr batch. The .I sigmask specifies the set of signals to block. If set, it is equivalent to atomically executing the following calls: .PP .in +4n .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); .EE .in .PP This works like .BR 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. .SH RETURN VALUE On success .BR io_uring_wait_cqes_min_timeout (3) returns the 0.On failure it returns .BR -errno . If the kernel doesn't support this functionality, .BR -EINVAL will be returned. See note on the feature flag. The most common failure case is not receiving a completion within the specified timeout, .B -ETIME is returned in this case. .SH SEE ALSO .BR io_uring_wait_cqe (3), .BR io_uring_wait_cqes (3), .BR io_uring_wait_cqe_timeout (3), .BR io_uring_wait_cqes (3), .BR io_uring_submit_and_wait_min_timeout (3)