io_uring_wait_cqe_timeout(3) liburing Manualio_uring_wait_cqe_timeout(3)
io_uring_wait_cqe_timeout - wait for one io_uring completion event with timeout
#include <liburing.h> int io_uring_wait_cqe_timeout(struct io_uring *ring, struct io_uring_cqe **cqe_ptr, struct __kernel_timespec *ts);
The io_uring_wait_cqe_timeout(3) function waits for one IO completion to be available from the queue belonging to the ring param, waiting for it if necessary or until the timeout ts expires. If an event is already available in the ring when invoked, no waiting will occur. The cqe_ptr param is filled in on success. If ts is specified and an older kernel without IORING_FEAT_EXT_ARG is used, the application does not need to call io_uring_submit(3) before calling io_uring_wait_cqes(3). For newer kernels with that feature flag set, there is no implied submit when waiting for a request.
On success io_uring_wait_cqe_timeout(3) returns 0 and the cqe_ptr param is filled in. On failure it returns -errno. The return value indicates the result of waiting for a CQE, and it has no relation to the CQE result itself.
io_uring_submit(3), io_uring_wait_cqes(3), io_uring_wait_cqe(3)
This page is part of the liburing (A library for io_uring) project. Information about the project can be found at ⟨https://github.com/axboe/liburing⟩. If you have a bug report for this manual page, send it to firstname.lastname@example.org. This page was obtained from the project's upstream Git repository ⟨https://github.com/axboe/liburing⟩ on 2023-06-23. (At that time, the date of the most recent commit that was found in the repository was 2023-06-22.) If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to email@example.com liburing-2.1 November 15, 2021io_uring_wait_cqe_timeout(3)
Pages that refer to this page: io_uring_cq_advance(3), io_uring_cqe_seen(3), io_uring_for_each_cqe(3), io_uring_wait_cqe(3), io_uring_wait_cqes(3), io_uring_wait_cqe_timeout(3)