No method to shutdown socket

[Sirius902]

I have a race condition between two threads, one trying to close a socket and the other reading from it as shown in the code below, but the thread calling recieve needs to be able to yield an error if the socket is closed.

fn recieveLoop(context: *Context) !void {
    while (true) {
        var buffer: [@sizeOf(Input)]u8 = undefined;

        if ((try context.sock.receive(&buffer)) == buffer.len) {
            const held = context.mutex.acquire();
            defer held.release();

            context.input = Input.deserialize(&buffer);
        } else {
            return;
        }
    }
}

If I call close in the other thread then it hits the .WSAENOTSOCK => unreachable, case in recvfrom. Can a method be exposed to cleanly shutdown a socket so there is no race condition?