def run(t1: Place) -> None:
Requires(token(t1, 2) and listener_io(t1))
Ensures(False)
Open(listener_io(t1))
server_socket, t_loop = create_server_socket(t1)
while True:
Invariant(
token(t_loop, 1) and
listener_loop_io(t_loop, server_socket) and
server_socket != None
)
Open(listener_loop_io(t_loop, server_socket))
client_socket, t3 = accept(t_loop, server_socket)
data, t4 = read_all(t3, client_socket, timeout=1)
Open(output_io(t4, client_socket, data))
if data is not None:
t5, t6 = Split(t4)
t7 = print_int(t6, get_address(client_socket))
t8 = send(t5, client_socket, data)
t9 = Join(t8, t7)
else:
t9 = NoOp(t4)
t_loop = close(t9, client_socket)
def handle_client(client_socket: Socket, t1: Place) -> None:
Requires(client_socket is not None)
Requires(token(t1, 2) and handle_client_io(t1, client_socket))
Requires(MustTerminate(2))
Open(handle_client_io(t1, client_socket))
data, t4 = read_all(t1, client_socket, timeout=1)
Open(output_io(t4, client_socket, data))
if data is not None:
t5, t6 = Split(t4)
t7 = print_int(t6, get_address(client_socket))
t8 = send(t5, client_socket, data)
t9 = Join(t8, t7)
else:
t9 = NoOp(t4)
t10 = close(t9, client_socket)
End(t10)
def test(t1: Place) -> Place:
IOExists1(Place)(lambda t_end: (
Requires(token(t1, 2) and test_io(t1, t_end)),
Ensures(token(t_end) and t_end == Result()),
))
Open(test_io(t1))
t2 = NoOp(t1)
t3, t4 = Split(t2)
res, t5 = SetVar(t4, 1)
t6 = Join(t3, t5)
t_end = NoOp(t6)
Assert(res == 1)
return t_end
def run(t1: Place) -> None:
Requires(token(t1, 2) and listener_io(t1))
Ensures(False)
Open(listener_io(t1))
server_socket, t_loop = create_server_socket(t1)
while True:
Invariant(
token(t_loop, 1) and listener_loop_io(t_loop, server_socket)
and server_socket != None)
Open(listener_loop_io(t_loop, server_socket))
client_socket, t3 = accept(t_loop, server_socket)
t4, t_loop = Split(t3)
handle_client(client_socket, t4)