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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | COLOPHON |
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io_uring_get_sqe(3) liburing Manual io_uring_get_sqe(3)
io_uring_get_sqe - get the next available submission queue entry
from the submission queue
#include <liburing.h>
struct io_uring_sqe *io_uring_get_sqe(struct io_uring *ring);
The io_uring_get_sqe(3) function gets the next available
submission queue entry from the submission queue belonging to the
ring param.
On success io_uring_get_sqe(3) returns a pointer to the
submission queue entry. On failure NULL is returned.
If a submission queue entry is returned, it should be filled out
via one of the prep functions such as io_uring_prep_read(3) and
submitted via io_uring_submit(3).
Note that neither io_uring_get_sqe nor the prep functions set (or
clear) the user_data field of the SQE. If the caller expects
io_uring_cqe_get_data(3) or io_uring_cqe_get_data64(3) to return
valid data when reaping IO completions, either
io_uring_sqe_set_data(3) or io_uring_sqe_set_data64(3) MUST have
been called before submitting the request.
io_uring_get_sqe(3) returns a pointer to the next submission
queue event on success and NULL on failure. If NULL is returned,
the SQ ring is currently full and entries must be submitted for
processing before new ones can get allocated.
io_uring_submit(3), io_uring_sqe_set_data(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 io-uring@vger.kernel.org. This page
was obtained from the project's upstream Git repository
⟨https://github.com/axboe/liburing⟩ on 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-06-03.) 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
man-pages@man7.org
liburing-0.7 July 10, 2020 io_uring_get_sqe(3)
Pages that refer to this page: io_uring_cqe_get_data(3), io_uring_cqe_get_data64(3), io_uring_get_events(3), io_uring_get_sqe(3), io_uring_prep_accept(3), io_uring_prep_accept_direct(3), io_uring_prep_cancel(3), io_uring_prep_cancel64(3), io_uring_prep_cancel_fd(3), io_uring_prep_close(3), io_uring_prep_close_direct(3), io_uring_prep_cmd(3), io_uring_prep_connect(3), io_uring_prep_fadvise(3), io_uring_prep_fallocate(3), io_uring_prep_fgetxattr(3), io_uring_prep_files_update(3), io_uring_prep_fixed_fd_install(3), io_uring_prep_fsetxattr(3), io_uring_prep_fsync(3), io_uring_prep_ftruncate(3), io_uring_prep_futex_wait(3), io_uring_prep_futex_waitv(3), io_uring_prep_futex_wake(3), io_uring_prep_getxattr(3), io_uring_prep_link(3), io_uring_prep_linkat(3), io_uring_prep_link_timeout(3), io_uring_prep_madvise(3), io_uring_prep_mkdir(3), io_uring_prep_mkdirat(3), io_uring_prep_multishot_accept(3), io_uring_prep_multishot_accept_direct(3), io_uring_prep_nop(3), io_uring_prep_openat2(3), io_uring_prep_openat2_direct(3), io_uring_prep_openat(3), io_uring_prep_openat_direct(3), io_uring_prep_poll_add(3), io_uring_prep_poll_multishot(3), io_uring_prep_poll_remove(3), io_uring_prep_poll_update(3), io_uring_prep_provide_buffers(3), io_uring_prep_read(3), io_uring_prep_read_multishot(3), io_uring_prep_readv2(3), io_uring_prep_readv(3), io_uring_prep_recv(3), io_uring_prep_recvmsg(3), io_uring_prep_recvmsg_multishot(3), io_uring_prep_recv_multishot(3), io_uring_prep_remove_buffers(3), io_uring_prep_rename(3), io_uring_prep_renameat(3), io_uring_prep_send(3), io_uring_prep_send_bundle(3), io_uring_prep_sendmsg(3), io_uring_prep_sendmsg_zc(3), io_uring_prep_send_set_addr(3), io_uring_prep_sendto(3), io_uring_prep_send_zc(3), io_uring_prep_send_zc_fixed(3), io_uring_prep_setxattr(3), io_uring_prep_shutdown(3), io_uring_prep_socket(3), io_uring_prep_socket_direct(3), io_uring_prep_socket_direct_alloc(3), io_uring_prep_splice(3), io_uring_prep_statx(3), io_uring_prep_symlink(3), io_uring_prep_symlinkat(3), io_uring_prep_sync_file_range(3), io_uring_prep_tee(3), io_uring_prep_timeout(3), io_uring_prep_timeout_remove(3), io_uring_prep_timeout_update(3), io_uring_prep_unlink(3), io_uring_prep_unlinkat(3), io_uring_prep_waitid(3), io_uring_prep_write(3), io_uring_prep_writev2(3), io_uring_prep_writev(3), io_uring_register_buffers(3), io_uring_register_buffers_sparse(3), io_uring_register_buffers_tags(3), io_uring_register_buffers_update_tag(3), io_uring_register_files(3), io_uring_register_files_sparse(3), io_uring_register_files_tags(3), io_uring_register_files_update(3), io_uring_register_files_update_tag(3), io_uring_sqe_set_data(3), io_uring_sqe_set_data64(3), io_uring_submit(3), io_uring_submit_and_wait(3), io_uring_submit_and_wait_timeout(3)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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