1 | /* |
1 | /* |
2 | * libev select fd activity backend |
2 | * libev select fd activity backend |
3 | * |
3 | * |
4 | * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de> |
5 | * All rights reserved. |
5 | * All rights reserved. |
6 | * |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
8 | * tion, are permitted provided that the following conditions are met: |
8 | * tion, are permitted provided that the following conditions are met: |
9 | * |
9 | * |
… | |
… | |
106 | #else |
106 | #else |
107 | |
107 | |
108 | int word = fd / NFDBITS; |
108 | int word = fd / NFDBITS; |
109 | fd_mask mask = 1UL << (fd % NFDBITS); |
109 | fd_mask mask = 1UL << (fd % NFDBITS); |
110 | |
110 | |
111 | if (expect_false (vec_max <= word)) |
111 | if (ecb_expect_false (vec_max <= word)) |
112 | { |
112 | { |
113 | int new_max = word + 1; |
113 | int new_max = word + 1; |
114 | |
114 | |
115 | vec_ri = ev_realloc (vec_ri, new_max * NFDBYTES); |
115 | vec_ri = ev_realloc (vec_ri, new_max * NFDBYTES); |
116 | vec_ro = ev_realloc (vec_ro, new_max * NFDBYTES); /* could free/malloc */ |
116 | vec_ro = ev_realloc (vec_ro, new_max * NFDBYTES); /* could free/malloc */ |
… | |
… | |
169 | #else |
169 | #else |
170 | res = select (vec_max * NFDBITS, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv); |
170 | res = select (vec_max * NFDBITS, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv); |
171 | #endif |
171 | #endif |
172 | EV_ACQUIRE_CB; |
172 | EV_ACQUIRE_CB; |
173 | |
173 | |
174 | if (expect_false (res < 0)) |
174 | if (ecb_expect_false (res < 0)) |
175 | { |
175 | { |
176 | #if EV_SELECT_IS_WINSOCKET |
176 | #if EV_SELECT_IS_WINSOCKET |
177 | errno = WSAGetLastError (); |
177 | errno = WSAGetLastError (); |
178 | #endif |
178 | #endif |
179 | #ifdef WSABASEERR |
179 | #ifdef WSABASEERR |
… | |
… | |
193 | * we also get EINVAL when the timeout is invalid, but we ignore this case here |
193 | * we also get EINVAL when the timeout is invalid, but we ignore this case here |
194 | * and assume that EINVAL always means: you have to wait manually. |
194 | * and assume that EINVAL always means: you have to wait manually. |
195 | */ |
195 | */ |
196 | if (errno == EINVAL) |
196 | if (errno == EINVAL) |
197 | { |
197 | { |
198 | ev_sleep (timeout); |
198 | if (timeout) |
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|
199 | { |
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|
200 | unsigned long ms = EV_TS_TO_MSEC (timeout); |
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201 | Sleep (ms ? ms : 1); |
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202 | } |
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203 | |
199 | return; |
204 | return; |
200 | } |
205 | } |
201 | #endif |
206 | #endif |
202 | |
207 | |
203 | if (errno == EBADF) |
208 | if (errno == EBADF) |
… | |
… | |
229 | if (FD_ISSET (handle, (fd_set *)vec_wo)) events |= EV_WRITE; |
234 | if (FD_ISSET (handle, (fd_set *)vec_wo)) events |= EV_WRITE; |
230 | #ifdef _WIN32 |
235 | #ifdef _WIN32 |
231 | if (FD_ISSET (handle, (fd_set *)vec_eo)) events |= EV_WRITE; |
236 | if (FD_ISSET (handle, (fd_set *)vec_eo)) events |= EV_WRITE; |
232 | #endif |
237 | #endif |
233 | |
238 | |
234 | if (expect_true (events)) |
239 | if (ecb_expect_true (events)) |
235 | fd_event (EV_A_ fd, events); |
240 | fd_event (EV_A_ fd, events); |
236 | } |
241 | } |
237 | } |
242 | } |
238 | |
243 | |
239 | #else |
244 | #else |
… | |
… | |
255 | int events = 0; |
260 | int events = 0; |
256 | |
261 | |
257 | events |= word_r & mask ? EV_READ : 0; |
262 | events |= word_r & mask ? EV_READ : 0; |
258 | events |= word_w & mask ? EV_WRITE : 0; |
263 | events |= word_w & mask ? EV_WRITE : 0; |
259 | |
264 | |
260 | if (expect_true (events)) |
265 | if (ecb_expect_true (events)) |
261 | fd_event (EV_A_ word * NFDBITS + bit, events); |
266 | fd_event (EV_A_ word * NFDBITS + bit, events); |
262 | } |
267 | } |
263 | } |
268 | } |
264 | } |
269 | } |
265 | |
270 | |
266 | #endif |
271 | #endif |
267 | } |
272 | } |
268 | |
273 | |
269 | int inline_size |
274 | inline_size |
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|
275 | int |
270 | select_init (EV_P_ int flags) |
276 | select_init (EV_P_ int flags) |
271 | { |
277 | { |
272 | backend_fudge = 0.; /* posix says this is zero */ |
278 | backend_mintime = EV_TS_CONST (1e-6); |
273 | backend_modify = select_modify; |
279 | backend_modify = select_modify; |
274 | backend_poll = select_poll; |
280 | backend_poll = select_poll; |
275 | |
281 | |
276 | #if EV_SELECT_USE_FD_SET |
282 | #if EV_SELECT_USE_FD_SET |
277 | vec_ri = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_ri); |
283 | vec_ri = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_ri); |
278 | vec_ro = ev_malloc (sizeof (fd_set)); |
284 | vec_ro = ev_malloc (sizeof (fd_set)); |
279 | vec_wi = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_wi); |
285 | vec_wi = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_wi); |
… | |
… | |
293 | #endif |
299 | #endif |
294 | |
300 | |
295 | return EVBACKEND_SELECT; |
301 | return EVBACKEND_SELECT; |
296 | } |
302 | } |
297 | |
303 | |
298 | void inline_size |
304 | inline_size |
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305 | void |
299 | select_destroy (EV_P) |
306 | select_destroy (EV_P) |
300 | { |
307 | { |
301 | ev_free (vec_ri); |
308 | ev_free (vec_ri); |
302 | ev_free (vec_ro); |
309 | ev_free (vec_ro); |
303 | ev_free (vec_wi); |
310 | ev_free (vec_wi); |
… | |
… | |
305 | #ifdef _WIN32 |
312 | #ifdef _WIN32 |
306 | ev_free (vec_eo); |
313 | ev_free (vec_eo); |
307 | #endif |
314 | #endif |
308 | } |
315 | } |
309 | |
316 | |
310 | |
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