ngx_nonblocking    27 src/os/unix/ngx_socket.c ngx_nonblocking(ngx_socket_t s)
ngx_nonblocking    33 src/os/unix/ngx_socket.h #define ngx_nonblocking(s)  fcntl(s, F_SETFL, fcntl(s, F_GETFL) | O_NONBLOCK)