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.\" Copyright (C) 2021 Stefan Roesch <shr@fb.com> .\" .\" SPDX-License-Identifier: LGPL-2.0-or-later .\" .TH io_uring_wait_cqes 3 "November 15, 2021" "liburing-2.1" "liburing Manual" .SH NAME io_uring_wait_cqes \- wait for one or more io_uring completion events .SH SYNOPSIS .nf .B #include <liburing.h> .PP .BI "int io_uring_wait_cqes(struct io_uring *" ring "," .BI " struct io_uring_cqe **" cqe_ptr "," .BI " unsigned " wait_nr "," .BI " struct __kernel_timespec *" ts "," .BI " sigset_t *" sigmask "); .fi .SH DESCRIPTION .PP The .BR io_uring_wait_cqes (3) function returns .I wait_nr IO completions from the queue belonging to the .I ring param, waiting for them if necessary or until the timeout .I ts expires. The .I sigmask specifies the set of signals to block. The prevailing signal mask is restored before returning. The .I cqe_ptr param is filled in on success. If .I ts is specified and an older kernel without .B IORING_FEAT_EXT_ARG is used, the application does not need to call .BR io_uring_submit (3) before calling .BR io_uring_wait_cqes (3). For newer kernels with that feature flag set, there is no implied submit when waiting for a request. .SH RETURN VALUE On success .BR io_uring_wait_cqes (3) returns 0 and the cqe_ptr param is filled in. On failure it returns .BR -errno . .SH SEE ALSO .BR io_uring_submit (3), .BR io_uring_wait_cqe_timeout (3), .BR io_uring_wait_cqe (3)
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13 entries across 13 versions & 1 rubygems