Function accept4

app/redis-6.2.6/src/anet_ff.c:279–292

}

int
accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags)
{
    if (unlikely(inited == 0)) {
        INIT_FUNCTION(accept4);
        return real_accept4(sockfd, addr, addrlen, flags);
    }

    if (ff_fdisused(sockfd)) {
        return ff_accept(sockfd, (struct linux_sockaddr *)addr, addrlen);
    } else {
        return real_accept4(sockfd, addr, addrlen, flags);
    }
}

int
close(int sockfd)