Commit | Line | Data |
---|---|---|
982ec720 | 1 | -module(life_time). |
d2a0e2f9 SK |
2 | -behaviour(gen_server). |
3 | ||
4 | ||
5 | %% API | |
1aa9333c | 6 | -export([start_link/3 |
29199e7e | 7 | ,report_state/3 |
d2a0e2f9 SK |
8 | ]). |
9 | ||
10 | %% Callbacks | |
11 | -export([init/1 | |
12 | ,handle_call/3 | |
13 | ,handle_cast/2 | |
14 | ,handle_info/2 | |
15 | ,terminate/2 | |
16 | ,code_change/3 | |
17 | ]). | |
18 | ||
19 | ||
a43ebd2e | 20 | -define(INTERVAL, 100). % In milliseconds |
d2a0e2f9 SK |
21 | |
22 | -define(CHAR_DEAD, 32). % Space | |
23 | -define(CHAR_ALIVE, 111). % o | |
eec4cd1f | 24 | -define(CHAR_BAR, 45). % - |
d2a0e2f9 SK |
25 | |
26 | ||
27 | -record(state, {x :: integer() | |
1aa9333c | 28 | ,y :: integer() |
d2a0e2f9 SK |
29 | ,cells :: list(atom()) |
30 | ,num_cells :: integer() | |
31 | ,state_pairs :: list(tuple(integer(), integer())) | [] | |
32 | ,replies_pending :: integer() | |
0a9b8c17 | 33 | ,gen_id :: integer() |
d2a0e2f9 SK |
34 | }). |
35 | ||
36 | ||
37 | %% ============================================================================ | |
38 | %% API | |
39 | %% ============================================================================ | |
40 | ||
1aa9333c | 41 | start_link(X, Y, Cells) -> |
d2a0e2f9 | 42 | ServerName = {local, ?MODULE}, |
1aa9333c | 43 | Args = [X, Y, Cells], |
d2a0e2f9 SK |
44 | Opts = [], |
45 | gen_server:start_link(ServerName, ?MODULE, Args, Opts). | |
46 | ||
47 | ||
29199e7e SK |
48 | report_state(CellID, GenID, CellState) -> |
49 | gen_server:cast(?MODULE, {report_state, {CellID, GenID, CellState}}). | |
d2a0e2f9 SK |
50 | |
51 | ||
52 | %% ============================================================================ | |
53 | %% Callbacks | |
54 | %% ============================================================================ | |
55 | ||
1aa9333c | 56 | init([X, Y, Cells]) -> |
0a9b8c17 SK |
57 | State = #state{x = X |
58 | ,y = Y | |
59 | ,cells = Cells | |
60 | ,num_cells = length(Cells) | |
61 | ,state_pairs = [] | |
62 | ,replies_pending = 0 | |
63 | ,gen_id = 0 | |
d2a0e2f9 | 64 | }, |
1d121bcf | 65 | ok = schedule_next_gen(), |
d2a0e2f9 SK |
66 | {ok, State}. |
67 | ||
68 | ||
69 | terminate(_Reason, State) -> | |
70 | {ok, State}. | |
71 | ||
72 | ||
73 | code_change(_Old, State, _Other) -> | |
74 | {ok, State}. | |
75 | ||
76 | ||
77 | handle_call(_Msg, _From, State) -> | |
78 | {reply, ok, State}. | |
79 | ||
80 | ||
0a9b8c17 | 81 | handle_cast(next_gen, |
172421cb SK |
82 | #state{cells=Cells |
83 | ,num_cells=NumCells | |
84 | ,state_pairs=[] | |
0a9b8c17 | 85 | ,gen_id=GenID |
172421cb SK |
86 | }=State) -> |
87 | ||
0a9b8c17 SK |
88 | NewGenID = GenID + 1, |
89 | ok = cast_all(Cells, {next_gen, NewGenID}), | |
90 | {noreply, State#state{replies_pending=NumCells, gen_id=NewGenID}}; | |
d2a0e2f9 | 91 | |
29199e7e | 92 | handle_cast({report_state, {CellID, GenID, CellState}}, |
d2a0e2f9 | 93 | #state{x=X |
1aa9333c | 94 | ,y=Y |
d2a0e2f9 SK |
95 | ,state_pairs=StatePairs |
96 | ,replies_pending=RepliesPending | |
0a9b8c17 | 97 | ,gen_id=GenID |
812a14ea | 98 | ,num_cells=NumCells |
d2a0e2f9 SK |
99 | }=State) -> |
100 | ||
29199e7e | 101 | NewStatePairs = [{CellID, CellState} | StatePairs], |
d2a0e2f9 SK |
102 | NewRepliesPending = RepliesPending - 1, |
103 | NewState = State#state{replies_pending=NewRepliesPending}, | |
104 | ||
105 | case NewRepliesPending of | |
106 | 0 -> | |
3803d7be SK |
107 | SortedStatePairs = lists:sort( |
108 | fun({A, _}, {B, _}) -> A < B end, | |
109 | NewStatePairs | |
110 | ), | |
d2a0e2f9 | 111 | StateChars = [state_to_char(S) || {_, S} <- SortedStatePairs], |
eec4cd1f | 112 | |
812a14ea | 113 | ok = io:format( |
a88b2916 | 114 | "X: ~b Y: ~b CELLS: ~b GENERATION: ~b~n", |
0a9b8c17 | 115 | [X, Y, NumCells, GenID] |
812a14ea | 116 | ), |
f7349482 | 117 | ok = do_print_bar(X), |
d2a0e2f9 | 118 | ok = do_print_state_chars(X, StateChars), |
d2a0e2f9 | 119 | ok = timer:sleep(?INTERVAL), |
1d121bcf | 120 | ok = schedule_next_gen(), |
a88b2916 | 121 | {noreply, NewState#state{state_pairs=[]}}; |
d2a0e2f9 SK |
122 | |
123 | _N -> | |
124 | {noreply, NewState#state{state_pairs=NewStatePairs}} | |
125 | end; | |
126 | ||
127 | handle_cast(_Msg, State) -> | |
128 | {noreply, State}. | |
129 | ||
130 | ||
131 | handle_info(_Msg, State) -> | |
132 | {noreply, State}. | |
133 | ||
134 | ||
135 | %% ============================================================================ | |
136 | %% Internal | |
137 | %% ============================================================================ | |
138 | ||
0a9b8c17 | 139 | schedule_next_gen() -> |
1d121bcf | 140 | ok = gen_server:cast(?MODULE, next_gen). |
172421cb SK |
141 | |
142 | ||
143 | cast_all([], _) -> ok; | |
144 | cast_all([Server | Servers], Msg) -> | |
145 | ok = gen_server:cast(Server, Msg), | |
146 | cast_all(Servers, Msg). | |
d2a0e2f9 SK |
147 | |
148 | ||
149 | state_to_char(0) -> ?CHAR_DEAD; | |
150 | state_to_char(1) -> ?CHAR_ALIVE. | |
151 | ||
152 | ||
153 | do_print_state_chars(_, []) -> ok; | |
154 | do_print_state_chars(X, Chars) -> | |
155 | {XChars, RestChars} = lists:split(X, Chars), | |
156 | ok = io:format([XChars, $\n]), | |
157 | do_print_state_chars(X, RestChars). | |
158 | ||
159 | ||
160 | do_print_bar(X) -> | |
161 | io:format("~s~n", [[?CHAR_BAR || _ <- lists:seq(1, X - 1)]]). |