27 struct EchoState {  struct
34 #define ECHO_STATE(ese) (*(struct EchoState **)(&ese->pad[1]))  argument
37   struct EchoState *es = hw_opts; /* shorter than __attribute */  in echo_open()
38   struct EchoState **es_ptr;  in echo_open()
39   if (sizeof(ese->pad) < sizeof(struct EchoState *)) {  in echo_open()
42           sizeof(struct EchoState *));  in echo_open()
46   *es_ptr = malloc(sizeof(struct EchoState));  in echo_open()
58   struct EchoState *es;  in echo_close()
69   struct EchoState *es = ECHO_STATE(ese);  in echo_receive()
92   struct EchoState *es = ECHO_STATE(ese);  in echo_transmit()
114   struct EchoState *es = ECHO_STATE(ese);  in echo_poll()