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7c673cae FG |
1 | /* |
2 | * C eventloop example (c_eventloop.c). | |
3 | * | |
4 | * Ecmascript code to initialize the exposed API (setTimeout() etc) when | |
5 | * using the C eventloop. | |
6 | * | |
7 | * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Timers | |
8 | */ | |
9 | ||
10 | /* | |
11 | * Timer API | |
12 | */ | |
13 | ||
14 | function setTimeout(func, delay) { | |
15 | var cb_func; | |
16 | var bind_args; | |
17 | var timer_id; | |
18 | ||
19 | if (typeof delay !== 'number') { | |
20 | throw new TypeError('delay is not a number'); | |
21 | } | |
22 | ||
23 | if (typeof func === 'string') { | |
24 | // Legacy case: callback is a string. | |
25 | cb_func = eval.bind(this, func); | |
26 | } else if (typeof func !== 'function') { | |
27 | throw new TypeError('callback is not a function/string'); | |
28 | } else if (arguments.length > 2) { | |
29 | // Special case: callback arguments are provided. | |
30 | bind_args = Array.prototype.slice.call(arguments, 2); // [ arg1, arg2, ... ] | |
31 | bind_args.unshift(this); // [ global(this), arg1, arg2, ... ] | |
32 | cb_func = func.bind.apply(func, bind_args); | |
33 | } else { | |
34 | // Normal case: callback given as a function without arguments. | |
35 | cb_func = func; | |
36 | } | |
37 | ||
38 | timer_id = EventLoop.createTimer(cb_func, delay, true /*oneshot*/); | |
39 | ||
40 | return timer_id; | |
41 | } | |
42 | ||
43 | function clearTimeout(timer_id) { | |
44 | if (typeof timer_id !== 'number') { | |
45 | throw new TypeError('timer ID is not a number'); | |
46 | } | |
47 | var success = EventLoop.deleteTimer(timer_id); /* retval ignored */ | |
48 | } | |
49 | ||
50 | function setInterval(func, delay) { | |
51 | var cb_func; | |
52 | var bind_args; | |
53 | var timer_id; | |
54 | ||
55 | if (typeof delay !== 'number') { | |
56 | throw new TypeError('delay is not a number'); | |
57 | } | |
58 | ||
59 | if (typeof func === 'string') { | |
60 | // Legacy case: callback is a string. | |
61 | cb_func = eval.bind(this, func); | |
62 | } else if (typeof func !== 'function') { | |
63 | throw new TypeError('callback is not a function/string'); | |
64 | } else if (arguments.length > 2) { | |
65 | // Special case: callback arguments are provided. | |
66 | bind_args = Array.prototype.slice.call(arguments, 2); // [ arg1, arg2, ... ] | |
67 | bind_args.unshift(this); // [ global(this), arg1, arg2, ... ] | |
68 | cb_func = func.bind.apply(func, bind_args); | |
69 | } else { | |
70 | // Normal case: callback given as a function without arguments. | |
71 | cb_func = func; | |
72 | } | |
73 | ||
74 | timer_id = EventLoop.createTimer(cb_func, delay, false /*oneshot*/); | |
75 | ||
76 | return timer_id; | |
77 | } | |
78 | ||
79 | function clearInterval(timer_id) { | |
80 | if (typeof timer_id !== 'number') { | |
81 | throw new TypeError('timer ID is not a number'); | |
82 | } | |
83 | EventLoop.deleteTimer(timer_id); | |
84 | } | |
85 | ||
86 | function requestEventLoopExit() { | |
87 | EventLoop.requestExit(); | |
88 | } | |
89 | ||
90 | /* | |
91 | * Socket handling | |
92 | * | |
93 | * Ideally this would be implemented more in C than here for more speed | |
94 | * and smaller footprint: C code would directly maintain the callback state | |
95 | * and such. | |
96 | * | |
97 | * Also for more optimal I/O, the buffer churn caused by allocating and | |
98 | * freeing a lot of buffer values could be eliminated by reusing buffers. | |
99 | * Socket reads would then go into a pre-allocated buffer, for instance. | |
100 | */ | |
101 | ||
102 | EventLoop.socketListening = {}; | |
103 | EventLoop.socketReading = {}; | |
104 | EventLoop.socketConnecting = {}; | |
105 | ||
106 | EventLoop.fdPollHandler = function(fd, revents) { | |
107 | var data; | |
108 | var cb; | |
109 | var rc; | |
110 | var acc_res; | |
111 | ||
112 | //print('activity on fd', fd, 'revents', revents); | |
113 | ||
114 | if (revents & Poll.POLLIN) { | |
115 | cb = this.socketReading[fd]; | |
116 | if (cb) { | |
117 | data = Socket.read(fd); // no size control now | |
118 | //print('READ', Duktape.enc('jx', data)); | |
119 | if (data.length === 0) { | |
120 | this.close(fd); | |
121 | return; | |
122 | } | |
123 | cb(fd, data); | |
124 | } else { | |
125 | cb = this.socketListening[fd]; | |
126 | if (cb) { | |
127 | acc_res = Socket.accept(fd); | |
128 | //print('ACCEPT:', Duktape.enc('jx', acc_res)); | |
129 | cb(acc_res.fd, acc_res.addr, acc_res.port); | |
130 | } else { | |
131 | //print('UNKNOWN'); | |
132 | } | |
133 | } | |
134 | } | |
135 | ||
136 | if (revents & Poll.POLLOUT) { | |
137 | // Connected | |
138 | cb = this.socketConnecting[fd]; | |
139 | if (cb) { | |
140 | delete this.socketConnecting[fd]; | |
141 | cb(fd); | |
142 | } | |
143 | } | |
144 | ||
145 | if ((revents & ~(Poll.POLLIN | Poll.POLLOUT)) !== 0) { | |
146 | //print('unexpected revents, close fd'); | |
147 | this.close(fd); | |
148 | } | |
149 | } | |
150 | ||
151 | EventLoop.server = function(address, port, cb_accepted) { | |
152 | var fd = Socket.createServerSocket(address, port); | |
153 | this.socketListening[fd] = cb_accepted; | |
154 | this.listenFd(fd, Poll.POLLIN); | |
155 | } | |
156 | ||
157 | EventLoop.connect = function(address, port, cb_connected) { | |
158 | var fd = Socket.connect(address, port); | |
159 | this.socketConnecting[fd] = cb_connected; | |
160 | this.listenFd(fd, Poll.POLLOUT); | |
161 | } | |
162 | ||
163 | EventLoop.close = function(fd) { | |
164 | EventLoop.listenFd(fd, 0); | |
165 | delete this.socketListening[fd]; | |
166 | delete this.socketReading[fd]; | |
167 | delete this.socketConnecting[fd]; | |
168 | Socket.close(fd); | |
169 | } | |
170 | ||
171 | EventLoop.setReader = function(fd, cb_read) { | |
172 | this.socketReading[fd] = cb_read; | |
173 | this.listenFd(fd, Poll.POLLIN); | |
174 | } | |
175 | ||
176 | EventLoop.write = function(fd, data) { | |
177 | // This simple example doesn't have support for write blocking / draining | |
178 | var rc = Socket.write(fd, Duktape.Buffer(data)); | |
179 | } |