ssize_t mongoc_socket_sendv (mongoc_socket_t *sock, mongoc_iovec_t *iov, size_t iovcnt, int64_t expire_at);
- sock: A mongoc_socket_t.
- iov: A mongoc_iovec_t.
- iovcnt: A size_t containing the number of elements in iov.
- expire_at: A int64_t with absolute timeout in monotonic time. The monotonic clock is in microseconds and can be fetched using System Clock.
Sends a vector of buffers to the destination. This uses sendmsg() when available to perform a gathered write. If IOV_MAX is reached, a fallback will be used.
the number of bytes sent on success, or -1 on failure and errno is set.
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