1io_uring_prep_send_zc(3)        liburing Manual       io_uring_prep_send_zc(3)
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NAME

6       io_uring_prep_send_zc - prepare a zerocopy send request
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SYNOPSIS

9       #include <liburing.h>
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11       void io_uring_prep_send_zc(struct io_uring_sqe *sqe,
12                               int sockfd,
13                               const void *buf,
14                               size_t len,
15                               int flags,
16                               int zc_flags);
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DESCRIPTION

19       The io_uring_prep_send_zc(3) function prepares a zerocopy send request.
20       The submission queue entry sqe is setup  to  use  the  file  descriptor
21       sockfd  to  start sending the data from buf of size len bytes with send
22       modifier flags flags and zerocopy modifier flags zc_flags.
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24       This function prepares an async zerocopy send(2) request. See that  man
25       page  for details. For details on the zerocopy nature of it, see io_ur‐
26       ing_enter(2).
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RETURN VALUE

30       None
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ERRORS

33       The CQE res field will contain the result of the operation. See the re‐
34       lated man page for details on possible values. Note that where synchro‐
35       nous system calls will return -1 on failure and set errno to the actual
36       error value, io_uring never uses errno.  Instead it returns the negated
37       errno directly in the CQE res field.
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SEE ALSO

40       io_uring_get_sqe(3), io_uring_submit(3), io_uring_prep_send(3),  io_ur‐
41       ing_enter(2), send(2)
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45liburing-2.3                   September 6, 2022      io_uring_prep_send_zc(3)