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6 | namespace ev { |
6 | namespace ev { |
7 | |
7 | |
8 | template<class watcher> |
8 | template<class watcher> |
9 | class callback |
9 | class callback |
10 | { |
10 | { |
11 | struct object { }; |
11 | struct klass; // it is vital that this is never defined |
12 | |
12 | |
13 | void *obj; |
13 | klass *o; |
14 | void (object::*meth)(watcher &, int); |
14 | void (klass::*m)(watcher &, int); |
15 | |
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16 | /* a proxy is a kind of recipe on how to call a specific class method */ |
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17 | struct proxy_base { |
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18 | virtual void call (void *obj, void (object::*meth)(watcher &, int), watcher &w, int) const = 0; |
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19 | }; |
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20 | template<class O1, class O2> |
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21 | struct proxy : proxy_base { |
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22 | virtual void call (void *obj, void (object::*meth)(watcher &, int), watcher &w, int e) const |
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23 | { |
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24 | ((reinterpret_cast<O1 *>(obj)) ->* (reinterpret_cast<void (O2::*)(watcher &, int)>(meth))) |
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25 | (w, e); |
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26 | } |
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27 | }; |
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28 | |
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29 | proxy_base *prxy; |
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30 | |
15 | |
31 | public: |
16 | public: |
32 | template<class O1, class O2> |
17 | template<class O1, class O2> |
33 | explicit callback (O1 *object, void (O2::*method)(watcher &, int)) |
18 | explicit callback (O1 *object, void (O2::*method)(watcher &, int)) |
34 | { |
19 | { |
35 | static proxy<O1,O2> p; |
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36 | obj = reinterpret_cast<void *>(object); |
20 | o = reinterpret_cast<klass *>(object); |
37 | meth = reinterpret_cast<void (object::*)(watcher &, int)>(method); |
21 | m = reinterpret_cast<void (klass::*)(watcher &, int)>(method); |
38 | prxy = &p; |
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39 | } |
22 | } |
40 | |
23 | |
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24 | // this works because a standards-compliant C++ compiler |
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25 | // basically can't help it: it doesn't have the knowledge |
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26 | // required to miscompile (klass is not defined anywhere |
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27 | // and nothing is known about the constructor arguments) :) |
41 | void call (watcher *w, int e) const |
28 | void call (watcher *w, int revents) |
42 | { |
29 | { |
43 | return prxy->call (obj, meth, *w, e); |
30 | (o->*m) (*w, revents); |
44 | } |
31 | } |
45 | }; |
32 | }; |
46 | |
33 | |
47 | enum { |
34 | enum { |
48 | UNDEF = EV_UNDEF, |
35 | UNDEF = EV_UNDEF, |
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50 | READ = EV_READ, |
37 | READ = EV_READ, |
51 | WRITE = EV_WRITE, |
38 | WRITE = EV_WRITE, |
52 | TIMEOUT = EV_TIMEOUT, |
39 | TIMEOUT = EV_TIMEOUT, |
53 | PERIODIC = EV_PERIODIC, |
40 | PERIODIC = EV_PERIODIC, |
54 | SIGNAL = EV_SIGNAL, |
41 | SIGNAL = EV_SIGNAL, |
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42 | CHILD = EV_CHILD, |
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43 | STAT = EV_STAT, |
55 | IDLE = EV_IDLE, |
44 | IDLE = EV_IDLE, |
56 | CHECK = EV_CHECK, |
45 | CHECK = EV_CHECK, |
57 | PREPARE = EV_PREPARE, |
46 | PREPARE = EV_PREPARE, |
58 | CHILD = EV_CHILD, |
47 | FORK = EV_FORK, |
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48 | EMBED = EV_EMBED, |
59 | ERROR = EV_ERROR, |
49 | ERROR = EV_ERROR, |
60 | }; |
50 | }; |
61 | |
51 | |
62 | typedef ev_tstamp tstamp; |
52 | typedef ev_tstamp tstamp; |
63 | |
53 | |
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191 | { |
181 | { |
192 | ev_timer_again (EV_A_ static_cast<ev_timer *>(this)); |
182 | ev_timer_again (EV_A_ static_cast<ev_timer *>(this)); |
193 | } |
183 | } |
194 | EV_END_WATCHER (timer, timer) |
184 | EV_END_WATCHER (timer, timer) |
195 | |
185 | |
196 | #if EV_PERIODICS |
186 | #if EV_PERIODIC_ENABLE |
197 | EV_BEGIN_WATCHER (periodic, periodic) |
187 | EV_BEGIN_WATCHER (periodic, periodic) |
198 | void set (ev_tstamp at, ev_tstamp interval = 0.) |
188 | void set (ev_tstamp at, ev_tstamp interval = 0.) |
199 | { |
189 | { |
200 | int active = is_active (); |
190 | int active = is_active (); |
201 | if (active) stop (); |
191 | if (active) stop (); |
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212 | void again () |
202 | void again () |
213 | { |
203 | { |
214 | ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this)); |
204 | ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this)); |
215 | } |
205 | } |
216 | EV_END_WATCHER (periodic, periodic) |
206 | EV_END_WATCHER (periodic, periodic) |
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207 | #endif |
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208 | |
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209 | EV_BEGIN_WATCHER (sig, signal) |
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210 | void set (int signum) |
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211 | { |
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212 | int active = is_active (); |
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213 | if (active) stop (); |
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214 | ev_signal_set (static_cast<ev_signal *>(this), signum); |
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215 | if (active) start (); |
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216 | } |
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217 | |
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218 | void start (int signum) |
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219 | { |
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220 | set (signum); |
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221 | start (); |
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222 | } |
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223 | EV_END_WATCHER (sig, signal) |
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224 | |
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225 | EV_BEGIN_WATCHER (child, child) |
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226 | void set (int pid) |
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227 | { |
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228 | int active = is_active (); |
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229 | if (active) stop (); |
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230 | ev_child_set (static_cast<ev_child *>(this), pid); |
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231 | if (active) start (); |
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232 | } |
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233 | |
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234 | void start (int pid) |
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235 | { |
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236 | set (pid); |
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237 | start (); |
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238 | } |
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239 | EV_END_WATCHER (child, child) |
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240 | |
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241 | #if EV_STAT_ENABLE |
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242 | EV_BEGIN_WATCHER (stat, stat) |
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243 | void set (const char *path, ev_tstamp interval = 0.) |
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244 | { |
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245 | int active = is_active (); |
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246 | if (active) stop (); |
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247 | ev_stat_set (static_cast<ev_stat *>(this), path, interval); |
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248 | if (active) start (); |
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249 | } |
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250 | |
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251 | void start (const char *path, ev_tstamp interval = 0.) |
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252 | { |
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253 | stop (); |
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254 | set (path, interval); |
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255 | start (); |
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256 | } |
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257 | |
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258 | void update () |
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259 | { |
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260 | ev_stat_stat (EV_A_ static_cast<ev_stat *>(this)); |
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261 | } |
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262 | EV_END_WATCHER (stat, stat) |
217 | #endif |
263 | #endif |
218 | |
264 | |
219 | EV_BEGIN_WATCHER (idle, idle) |
265 | EV_BEGIN_WATCHER (idle, idle) |
220 | void set () { } |
266 | void set () { } |
221 | EV_END_WATCHER (idle, idle) |
267 | EV_END_WATCHER (idle, idle) |
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226 | |
272 | |
227 | EV_BEGIN_WATCHER (check, check) |
273 | EV_BEGIN_WATCHER (check, check) |
228 | void set () { } |
274 | void set () { } |
229 | EV_END_WATCHER (check, check) |
275 | EV_END_WATCHER (check, check) |
230 | |
276 | |
231 | EV_BEGIN_WATCHER (sig, signal) |
277 | #if EV_EMBED_ENABLE |
232 | void set (int signum) |
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233 | { |
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234 | int active = is_active (); |
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235 | if (active) stop (); |
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236 | ev_signal_set (static_cast<ev_signal *>(this), signum); |
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237 | if (active) start (); |
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238 | } |
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239 | |
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240 | void start (int signum) |
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241 | { |
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242 | set (signum); |
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243 | start (); |
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244 | } |
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245 | EV_END_WATCHER (sig, signal) |
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246 | |
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247 | EV_BEGIN_WATCHER (child, child) |
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248 | void set (int pid) |
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249 | { |
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250 | int active = is_active (); |
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251 | if (active) stop (); |
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252 | ev_child_set (static_cast<ev_child *>(this), pid); |
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253 | if (active) start (); |
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254 | } |
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255 | |
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256 | void start (int pid) |
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257 | { |
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258 | set (pid); |
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259 | start (); |
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260 | } |
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261 | EV_END_WATCHER (child, child) |
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262 | |
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263 | #if EV_MULTIPLICITY |
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264 | |
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265 | EV_BEGIN_WATCHER (embed, embed) |
278 | EV_BEGIN_WATCHER (embed, embed) |
266 | void set (struct ev_loop *loop) |
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267 | { |
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268 | int active = is_active (); |
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269 | if (active) stop (); |
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270 | ev_embed_set (static_cast<ev_embed *>(this), loop); |
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271 | if (active) start (); |
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272 | } |
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273 | |
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274 | void start (struct ev_loop *embedded_loop) |
279 | void start (struct ev_loop *embedded_loop) |
275 | { |
280 | { |
276 | set (embedded_loop); |
281 | stop (); |
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282 | ev_embed_set (static_cast<ev_embed *>(this), embedded_loop); |
277 | start (); |
283 | start (); |
278 | } |
284 | } |
279 | |
285 | |
280 | void sweep () |
286 | void sweep () |
281 | { |
287 | { |
282 | ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this)); |
288 | ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this)); |
283 | } |
289 | } |
284 | EV_END_WATCHER (embed, embed) |
290 | EV_END_WATCHER (embed, embed) |
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291 | #endif |
285 | |
292 | |
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293 | #if EV_FORK_ENABLE |
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294 | EV_BEGIN_WATCHER (fork, fork) |
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295 | void set () { } |
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296 | EV_END_WATCHER (fork, fork) |
286 | #endif |
297 | #endif |
287 | |
298 | |
288 | #undef EV_CONSTRUCT |
299 | #undef EV_CONSTRUCT |
289 | #undef EV_BEGIN_WATCHER |
300 | #undef EV_BEGIN_WATCHER |
290 | #undef EV_END_WATCHER |
301 | #undef EV_END_WATCHER |