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1 | /* |
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2 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions are |
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7 | * met: |
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8 | * |
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9 | * * Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * * Redistributions in binary form must reproduce the above |
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13 | * copyright notice, this list of conditions and the following |
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14 | * disclaimer in the documentation and/or other materials provided |
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15 | * with the distribution. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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18 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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19 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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20 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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21 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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22 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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23 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | */ |
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29 | |
| 1 | #include <math.h> |
30 | #include <math.h> |
| 2 | #include <stdlib.h> |
31 | #include <stdlib.h> |
| 3 | #include <unistd.h> |
32 | #include <unistd.h> |
| 4 | #include <fcntl.h> |
33 | #include <fcntl.h> |
| 5 | #include <signal.h> |
34 | #include <signal.h> |
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35 | #include <stddef.h> |
| 6 | |
36 | |
| 7 | #include <stdio.h> |
37 | #include <stdio.h> |
| 8 | |
38 | |
| 9 | #include <assert.h> |
39 | #include <assert.h> |
| 10 | #include <errno.h> |
40 | #include <errno.h> |
| 11 | #include <sys/time.h> |
41 | #include <sys/time.h> |
| 12 | #include <time.h> |
42 | #include <time.h> |
| 13 | |
43 | |
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44 | #ifndef HAVE_MONOTONIC |
| 14 | #ifdef CLOCK_MONOTONIC |
45 | # ifdef CLOCK_MONOTONIC |
| 15 | # define HAVE_MONOTONIC 1 |
46 | # define HAVE_MONOTONIC 1 |
| 16 | #endif |
47 | # endif |
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48 | #endif |
| 17 | |
49 | |
| 18 | #define HAVE_REALTIME 1 |
50 | #ifndef HAVE_SELECT |
| 19 | #define HAVE_EPOLL 1 |
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| 20 | #define HAVE_SELECT 1 |
51 | # define HAVE_SELECT 1 |
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52 | #endif |
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53 | |
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54 | #ifndef HAVE_EPOLL |
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55 | # define HAVE_EPOLL 0 |
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56 | #endif |
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57 | |
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58 | #ifndef HAVE_REALTIME |
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59 | # define HAVE_REALTIME 1 /* posix requirement, but might be slower */ |
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60 | #endif |
| 21 | |
61 | |
| 22 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
62 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
| 23 | #define MAX_BLOCKTIME 60. |
63 | #define MAX_BLOCKTIME 60. |
| 24 | |
64 | |
| 25 | #include "ev.h" |
65 | #include "ev.h" |
| 26 | |
66 | |
| 27 | struct ev_watcher { |
67 | typedef struct ev_watcher *W; |
| 28 | EV_WATCHER (ev_watcher); |
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| 29 | }; |
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| 30 | |
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| 31 | struct ev_watcher_list { |
68 | typedef struct ev_watcher_list *WL; |
| 32 | EV_WATCHER_LIST (ev_watcher_list); |
69 | typedef struct ev_watcher_time *WT; |
| 33 | }; |
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| 34 | |
70 | |
| 35 | static ev_tstamp now, diff; /* monotonic clock */ |
71 | static ev_tstamp now, diff; /* monotonic clock */ |
| 36 | ev_tstamp ev_now; |
72 | ev_tstamp ev_now; |
| 37 | int ev_method; |
73 | int ev_method; |
| 38 | |
74 | |
| … | |
… | |
| 75 | |
111 | |
| 76 | #define array_needsize(base,cur,cnt,init) \ |
112 | #define array_needsize(base,cur,cnt,init) \ |
| 77 | if ((cnt) > cur) \ |
113 | if ((cnt) > cur) \ |
| 78 | { \ |
114 | { \ |
| 79 | int newcnt = cur ? cur << 1 : 16; \ |
115 | int newcnt = cur ? cur << 1 : 16; \ |
| 80 | fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ |
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| 81 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
116 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
| 82 | init (base + cur, newcnt - cur); \ |
117 | init (base + cur, newcnt - cur); \ |
| 83 | cur = newcnt; \ |
118 | cur = newcnt; \ |
| 84 | } |
119 | } |
| 85 | |
120 | |
| … | |
… | |
| 108 | } |
143 | } |
| 109 | } |
144 | } |
| 110 | |
145 | |
| 111 | typedef struct |
146 | typedef struct |
| 112 | { |
147 | { |
| 113 | struct ev_watcher *w; |
148 | W w; |
| 114 | int events; |
149 | int events; |
| 115 | } ANPENDING; |
150 | } ANPENDING; |
| 116 | |
151 | |
| 117 | static ANPENDING *pendings; |
152 | static ANPENDING *pendings; |
| 118 | static int pendingmax, pendingcnt; |
153 | static int pendingmax, pendingcnt; |
| 119 | |
154 | |
| 120 | static void |
155 | static void |
| 121 | event (struct ev_watcher *w, int events) |
156 | event (W w, int events) |
| 122 | { |
157 | { |
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158 | if (w->active) |
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159 | { |
| 123 | w->pending = ++pendingcnt; |
160 | w->pending = ++pendingcnt; |
| 124 | array_needsize (pendings, pendingmax, pendingcnt, ); |
161 | array_needsize (pendings, pendingmax, pendingcnt, ); |
| 125 | pendings [pendingcnt - 1].w = w; |
162 | pendings [pendingcnt - 1].w = w; |
| 126 | pendings [pendingcnt - 1].events = events; |
163 | pendings [pendingcnt - 1].events = events; |
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164 | } |
| 127 | } |
165 | } |
| 128 | |
166 | |
| 129 | static void |
167 | static void |
| 130 | fd_event (int fd, int events) |
168 | fd_event (int fd, int events) |
| 131 | { |
169 | { |
| … | |
… | |
| 135 | for (w = anfd->head; w; w = w->next) |
173 | for (w = anfd->head; w; w = w->next) |
| 136 | { |
174 | { |
| 137 | int ev = w->events & events; |
175 | int ev = w->events & events; |
| 138 | |
176 | |
| 139 | if (ev) |
177 | if (ev) |
| 140 | event ((struct ev_watcher *)w, ev); |
178 | event ((W)w, ev); |
| 141 | } |
179 | } |
| 142 | } |
180 | } |
| 143 | |
181 | |
| 144 | static void |
182 | static void |
| 145 | queue_events (struct ev_watcher **events, int eventcnt, int type) |
183 | queue_events (W *events, int eventcnt, int type) |
| 146 | { |
184 | { |
| 147 | int i; |
185 | int i; |
| 148 | |
186 | |
| 149 | for (i = 0; i < eventcnt; ++i) |
187 | for (i = 0; i < eventcnt; ++i) |
| 150 | event (events [i], type); |
188 | event (events [i], type); |
| 151 | } |
189 | } |
| 152 | |
190 | |
| 153 | /*****************************************************************************/ |
191 | /* called on EBADF to verify fds */ |
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192 | static void |
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193 | fd_recheck () |
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194 | { |
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195 | int fd; |
| 154 | |
196 | |
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197 | for (fd = 0; fd < anfdmax; ++fd) |
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198 | if (anfds [fd].wev) |
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199 | if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) |
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200 | while (anfds [fd].head) |
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201 | evio_stop (anfds [fd].head); |
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202 | } |
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203 | |
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204 | /*****************************************************************************/ |
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205 | |
| 155 | static struct ev_timer **atimers; |
206 | static struct ev_timer **timers; |
| 156 | static int atimermax, atimercnt; |
207 | static int timermax, timercnt; |
| 157 | |
208 | |
| 158 | static struct ev_timer **rtimers; |
209 | static struct ev_periodic **periodics; |
| 159 | static int rtimermax, rtimercnt; |
210 | static int periodicmax, periodiccnt; |
| 160 | |
211 | |
| 161 | static void |
212 | static void |
| 162 | upheap (struct ev_timer **timers, int k) |
213 | upheap (WT *timers, int k) |
| 163 | { |
214 | { |
| 164 | struct ev_timer *w = timers [k]; |
215 | WT w = timers [k]; |
| 165 | |
216 | |
| 166 | while (k && timers [k >> 1]->at > w->at) |
217 | while (k && timers [k >> 1]->at > w->at) |
| 167 | { |
218 | { |
| 168 | timers [k] = timers [k >> 1]; |
219 | timers [k] = timers [k >> 1]; |
| 169 | timers [k]->active = k + 1; |
220 | timers [k]->active = k + 1; |
| … | |
… | |
| 174 | timers [k]->active = k + 1; |
225 | timers [k]->active = k + 1; |
| 175 | |
226 | |
| 176 | } |
227 | } |
| 177 | |
228 | |
| 178 | static void |
229 | static void |
| 179 | downheap (struct ev_timer **timers, int N, int k) |
230 | downheap (WT *timers, int N, int k) |
| 180 | { |
231 | { |
| 181 | struct ev_timer *w = timers [k]; |
232 | WT w = timers [k]; |
| 182 | |
233 | |
| 183 | while (k < (N >> 1)) |
234 | while (k < (N >> 1)) |
| 184 | { |
235 | { |
| 185 | int j = k << 1; |
236 | int j = k << 1; |
| 186 | |
237 | |
| … | |
… | |
| 250 | if (signals [sig].gotsig) |
301 | if (signals [sig].gotsig) |
| 251 | { |
302 | { |
| 252 | signals [sig].gotsig = 0; |
303 | signals [sig].gotsig = 0; |
| 253 | |
304 | |
| 254 | for (w = signals [sig].head; w; w = w->next) |
305 | for (w = signals [sig].head; w; w = w->next) |
| 255 | event ((struct ev_watcher *)w, EV_SIGNAL); |
306 | event ((W)w, EV_SIGNAL); |
| 256 | } |
307 | } |
| 257 | } |
308 | } |
| 258 | |
309 | |
| 259 | static void |
310 | static void |
| 260 | siginit (void) |
311 | siginit (void) |
| … | |
… | |
| 312 | if (ev_method == EVMETHOD_NONE) select_init (flags); |
363 | if (ev_method == EVMETHOD_NONE) select_init (flags); |
| 313 | #endif |
364 | #endif |
| 314 | |
365 | |
| 315 | if (ev_method) |
366 | if (ev_method) |
| 316 | { |
367 | { |
| 317 | evw_init (&sigev, sigcb, 0); |
368 | evw_init (&sigev, sigcb); |
| 318 | siginit (); |
369 | siginit (); |
| 319 | } |
370 | } |
| 320 | |
371 | |
| 321 | return ev_method; |
372 | return ev_method; |
| 322 | } |
373 | } |
| 323 | |
374 | |
| 324 | /*****************************************************************************/ |
375 | /*****************************************************************************/ |
| 325 | |
376 | |
| 326 | void ev_prefork (void) |
377 | void ev_prefork (void) |
| 327 | { |
378 | { |
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379 | /* nop */ |
| 328 | } |
380 | } |
| 329 | |
381 | |
| 330 | void ev_postfork_parent (void) |
382 | void ev_postfork_parent (void) |
| 331 | { |
383 | { |
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384 | /* nop */ |
| 332 | } |
385 | } |
| 333 | |
386 | |
| 334 | void ev_postfork_child (void) |
387 | void ev_postfork_child (void) |
| 335 | { |
388 | { |
| 336 | #if HAVE_EPOLL |
389 | #if HAVE_EPOLL |
| … | |
… | |
| 374 | } |
427 | } |
| 375 | |
428 | |
| 376 | static void |
429 | static void |
| 377 | call_pending () |
430 | call_pending () |
| 378 | { |
431 | { |
| 379 | int i; |
432 | while (pendingcnt) |
| 380 | |
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| 381 | for (i = 0; i < pendingcnt; ++i) |
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| 382 | { |
433 | { |
| 383 | ANPENDING *p = pendings + i; |
434 | ANPENDING *p = pendings + --pendingcnt; |
| 384 | |
435 | |
| 385 | if (p->w) |
436 | if (p->w) |
| 386 | { |
437 | { |
| 387 | p->w->pending = 0; |
438 | p->w->pending = 0; |
| 388 | p->w->cb (p->w, p->events); |
439 | p->w->cb (p->w, p->events); |
| 389 | } |
440 | } |
| 390 | } |
441 | } |
| 391 | |
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| 392 | pendingcnt = 0; |
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| 393 | } |
442 | } |
| 394 | |
443 | |
| 395 | static void |
444 | static void |
| 396 | timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now) |
445 | timers_reify () |
| 397 | { |
446 | { |
| 398 | while (timercnt && timers [0]->at <= now) |
447 | while (timercnt && timers [0]->at <= now) |
| 399 | { |
448 | { |
| 400 | struct ev_timer *w = timers [0]; |
449 | struct ev_timer *w = timers [0]; |
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450 | |
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451 | event ((W)w, EV_TIMEOUT); |
| 401 | |
452 | |
| 402 | /* first reschedule or stop timer */ |
453 | /* first reschedule or stop timer */ |
| 403 | if (w->repeat) |
454 | if (w->repeat) |
| 404 | { |
455 | { |
| 405 | if (w->is_abs) |
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| 406 | w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat; |
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| 407 | else |
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| 408 | w->at = now + w->repeat; |
456 | w->at = now + w->repeat; |
| 409 | |
457 | assert (("timer timeout in the past, negative repeat?", w->at > now)); |
| 410 | assert (w->at > now); |
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| 411 | |
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| 412 | downheap (timers, timercnt, 0); |
458 | downheap ((WT *)timers, timercnt, 0); |
| 413 | } |
459 | } |
| 414 | else |
460 | else |
| 415 | { |
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| 416 | evtimer_stop (w); /* nonrepeating: stop timer */ |
461 | evtimer_stop (w); /* nonrepeating: stop timer */ |
| 417 | --timercnt; /* maybe pass by reference instead? */ |
462 | } |
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463 | } |
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464 | |
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465 | static void |
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466 | periodics_reify () |
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467 | { |
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468 | while (periodiccnt && periodics [0]->at <= ev_now) |
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469 | { |
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470 | struct ev_periodic *w = periodics [0]; |
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471 | |
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472 | /* first reschedule or stop timer */ |
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473 | if (w->interval) |
| 418 | } |
474 | { |
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475 | w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; |
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476 | assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); |
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477 | downheap ((WT *)periodics, periodiccnt, 0); |
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478 | } |
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479 | else |
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480 | evperiodic_stop (w); /* nonrepeating: stop timer */ |
| 419 | |
481 | |
| 420 | event ((struct ev_watcher *)w, EV_TIMEOUT); |
482 | event ((W)w, EV_TIMEOUT); |
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483 | } |
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484 | } |
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485 | |
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486 | static void |
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487 | periodics_reschedule (ev_tstamp diff) |
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488 | { |
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489 | int i; |
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490 | |
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491 | /* adjust periodics after time jump */ |
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492 | for (i = 0; i < periodiccnt; ++i) |
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493 | { |
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494 | struct ev_periodic *w = periodics [i]; |
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495 | |
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496 | if (w->interval) |
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497 | { |
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498 | ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; |
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499 | |
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500 | if (fabs (diff) >= 1e-4) |
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501 | { |
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502 | evperiodic_stop (w); |
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503 | evperiodic_start (w); |
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504 | |
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505 | i = 0; /* restart loop, inefficient, but time jumps should be rare */ |
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506 | } |
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507 | } |
| 421 | } |
508 | } |
| 422 | } |
509 | } |
| 423 | |
510 | |
| 424 | static void |
511 | static void |
| 425 | time_update () |
512 | time_update () |
| 426 | { |
513 | { |
| 427 | int i; |
514 | int i; |
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515 | |
| 428 | ev_now = ev_time (); |
516 | ev_now = ev_time (); |
| 429 | |
517 | |
| 430 | if (have_monotonic) |
518 | if (have_monotonic) |
| 431 | { |
519 | { |
| 432 | ev_tstamp odiff = diff; |
520 | ev_tstamp odiff = diff; |
| 433 | |
521 | |
| 434 | /* detecting time jumps is much more difficult */ |
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| 435 | for (i = 2; --i; ) /* loop a few times, before making important decisions */ |
522 | for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
| 436 | { |
523 | { |
| 437 | now = get_clock (); |
524 | now = get_clock (); |
| 438 | diff = ev_now - now; |
525 | diff = ev_now - now; |
| 439 | |
526 | |
| 440 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
527 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
| 441 | return; /* all is well */ |
528 | return; /* all is well */ |
| 442 | |
529 | |
| 443 | ev_now = ev_time (); |
530 | ev_now = ev_time (); |
| 444 | } |
531 | } |
| 445 | |
532 | |
| 446 | /* time jump detected, reschedule atimers */ |
533 | periodics_reschedule (diff - odiff); |
| 447 | for (i = 0; i < atimercnt; ++i) |
534 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
| 448 | { |
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| 449 | struct ev_timer *w = atimers [i]; |
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| 450 | w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat; |
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| 451 | } |
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| 452 | } |
535 | } |
| 453 | else |
536 | else |
| 454 | { |
537 | { |
| 455 | if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) |
538 | if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) |
| 456 | /* time jump detected, adjust rtimers */ |
539 | { |
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540 | periodics_reschedule (ev_now - now); |
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541 | |
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542 | /* adjust timers. this is easy, as the offset is the same for all */ |
| 457 | for (i = 0; i < rtimercnt; ++i) |
543 | for (i = 0; i < timercnt; ++i) |
| 458 | rtimers [i]->at += ev_now - now; |
544 | timers [i]->at += diff; |
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545 | } |
| 459 | |
546 | |
| 460 | now = ev_now; |
547 | now = ev_now; |
| 461 | } |
548 | } |
| 462 | } |
549 | } |
| 463 | |
550 | |
| 464 | int ev_loop_done; |
551 | int ev_loop_done; |
| 465 | |
552 | |
| 466 | void ev_loop (int flags) |
553 | void ev_loop (int flags) |
| 467 | { |
554 | { |
| 468 | double block; |
555 | double block; |
| 469 | ev_loop_done = flags & EVLOOP_ONESHOT; |
556 | ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0; |
| 470 | |
557 | |
| 471 | if (checkcnt) |
558 | if (checkcnt) |
| 472 | { |
559 | { |
| 473 | queue_events (checks, checkcnt, EV_CHECK); |
560 | queue_events ((W *)checks, checkcnt, EV_CHECK); |
| 474 | call_pending (); |
561 | call_pending (); |
| 475 | } |
562 | } |
| 476 | |
563 | |
| 477 | do |
564 | do |
| 478 | { |
565 | { |
| 479 | /* update fd-related kernel structures */ |
566 | /* update fd-related kernel structures */ |
| 480 | fd_reify (); |
567 | fd_reify (); |
| 481 | |
568 | |
| 482 | /* calculate blocking time */ |
569 | /* calculate blocking time */ |
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570 | |
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571 | /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ |
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572 | ev_now = ev_time (); |
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573 | |
| 483 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
574 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
| 484 | block = 0.; |
575 | block = 0.; |
| 485 | else |
576 | else |
| 486 | { |
577 | { |
| 487 | block = MAX_BLOCKTIME; |
578 | block = MAX_BLOCKTIME; |
| 488 | |
579 | |
| 489 | if (rtimercnt) |
580 | if (timercnt) |
| 490 | { |
581 | { |
| 491 | ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge; |
582 | ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; |
| 492 | if (block > to) block = to; |
583 | if (block > to) block = to; |
| 493 | } |
584 | } |
| 494 | |
585 | |
| 495 | if (atimercnt) |
586 | if (periodiccnt) |
| 496 | { |
587 | { |
| 497 | ev_tstamp to = atimers [0]->at - ev_time () + method_fudge; |
588 | ev_tstamp to = periodics [0]->at - ev_now + method_fudge; |
| 498 | if (block > to) block = to; |
589 | if (block > to) block = to; |
| 499 | } |
590 | } |
| 500 | |
591 | |
| 501 | if (block < 0.) block = 0.; |
592 | if (block < 0.) block = 0.; |
| 502 | } |
593 | } |
| … | |
… | |
| 505 | |
596 | |
| 506 | /* update ev_now, do magic */ |
597 | /* update ev_now, do magic */ |
| 507 | time_update (); |
598 | time_update (); |
| 508 | |
599 | |
| 509 | /* queue pending timers and reschedule them */ |
600 | /* queue pending timers and reschedule them */ |
| 510 | /* absolute timers first */ |
601 | periodics_reify (); /* absolute timers first */ |
| 511 | timers_reify (atimers, atimercnt, ev_now); |
|
|
| 512 | /* relative timers second */ |
602 | timers_reify (); /* relative timers second */ |
| 513 | timers_reify (rtimers, rtimercnt, now); |
|
|
| 514 | |
603 | |
| 515 | /* queue idle watchers unless io or timers are pending */ |
604 | /* queue idle watchers unless io or timers are pending */ |
| 516 | if (!pendingcnt) |
605 | if (!pendingcnt) |
| 517 | queue_events (idles, idlecnt, EV_IDLE); |
606 | queue_events ((W *)idles, idlecnt, EV_IDLE); |
| 518 | |
607 | |
| 519 | /* queue check and possibly idle watchers */ |
608 | /* queue check and possibly idle watchers */ |
| 520 | queue_events (checks, checkcnt, EV_CHECK); |
609 | queue_events ((W *)checks, checkcnt, EV_CHECK); |
| 521 | |
610 | |
| 522 | call_pending (); |
611 | call_pending (); |
| 523 | } |
612 | } |
| 524 | while (!ev_loop_done); |
613 | while (!ev_loop_done); |
| 525 | } |
|
|
| 526 | |
614 | |
| 527 | /*****************************************************************************/ |
615 | if (ev_loop_done != 2) |
|
|
616 | ev_loop_done = 0; |
|
|
617 | } |
| 528 | |
618 | |
|
|
619 | /*****************************************************************************/ |
|
|
620 | |
| 529 | static void |
621 | static void |
| 530 | wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem) |
622 | wlist_add (WL *head, WL elem) |
| 531 | { |
623 | { |
| 532 | elem->next = *head; |
624 | elem->next = *head; |
| 533 | *head = elem; |
625 | *head = elem; |
| 534 | } |
626 | } |
| 535 | |
627 | |
| 536 | static void |
628 | static void |
| 537 | wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem) |
629 | wlist_del (WL *head, WL elem) |
| 538 | { |
630 | { |
| 539 | while (*head) |
631 | while (*head) |
| 540 | { |
632 | { |
| 541 | if (*head == elem) |
633 | if (*head == elem) |
| 542 | { |
634 | { |
| … | |
… | |
| 547 | head = &(*head)->next; |
639 | head = &(*head)->next; |
| 548 | } |
640 | } |
| 549 | } |
641 | } |
| 550 | |
642 | |
| 551 | static void |
643 | static void |
| 552 | ev_start (struct ev_watcher *w, int active) |
644 | ev_clear (W w) |
| 553 | { |
645 | { |
|
|
646 | if (w->pending) |
|
|
647 | { |
|
|
648 | pendings [w->pending - 1].w = 0; |
| 554 | w->pending = 0; |
649 | w->pending = 0; |
|
|
650 | } |
|
|
651 | } |
|
|
652 | |
|
|
653 | static void |
|
|
654 | ev_start (W w, int active) |
|
|
655 | { |
| 555 | w->active = active; |
656 | w->active = active; |
| 556 | } |
657 | } |
| 557 | |
658 | |
| 558 | static void |
659 | static void |
| 559 | ev_stop (struct ev_watcher *w) |
660 | ev_stop (W w) |
| 560 | { |
661 | { |
| 561 | if (w->pending) |
|
|
| 562 | pendings [w->pending - 1].w = 0; |
|
|
| 563 | |
|
|
| 564 | w->active = 0; |
662 | w->active = 0; |
| 565 | /* nop */ |
|
|
| 566 | } |
663 | } |
| 567 | |
664 | |
| 568 | /*****************************************************************************/ |
665 | /*****************************************************************************/ |
| 569 | |
666 | |
| 570 | void |
667 | void |
| … | |
… | |
| 573 | if (ev_is_active (w)) |
670 | if (ev_is_active (w)) |
| 574 | return; |
671 | return; |
| 575 | |
672 | |
| 576 | int fd = w->fd; |
673 | int fd = w->fd; |
| 577 | |
674 | |
| 578 | ev_start ((struct ev_watcher *)w, 1); |
675 | ev_start ((W)w, 1); |
| 579 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
676 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
| 580 | wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w); |
677 | wlist_add ((WL *)&anfds[fd].head, (WL)w); |
| 581 | |
678 | |
| 582 | ++fdchangecnt; |
679 | ++fdchangecnt; |
| 583 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
680 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
| 584 | fdchanges [fdchangecnt - 1] = fd; |
681 | fdchanges [fdchangecnt - 1] = fd; |
| 585 | } |
682 | } |
| 586 | |
683 | |
| 587 | void |
684 | void |
| 588 | evio_stop (struct ev_io *w) |
685 | evio_stop (struct ev_io *w) |
| 589 | { |
686 | { |
|
|
687 | ev_clear ((W)w); |
| 590 | if (!ev_is_active (w)) |
688 | if (!ev_is_active (w)) |
| 591 | return; |
689 | return; |
| 592 | |
690 | |
| 593 | wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w); |
691 | wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
| 594 | ev_stop ((struct ev_watcher *)w); |
692 | ev_stop ((W)w); |
| 595 | |
693 | |
| 596 | ++fdchangecnt; |
694 | ++fdchangecnt; |
| 597 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
695 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
| 598 | fdchanges [fdchangecnt - 1] = w->fd; |
696 | fdchanges [fdchangecnt - 1] = w->fd; |
| 599 | } |
697 | } |
| … | |
… | |
| 602 | evtimer_start (struct ev_timer *w) |
700 | evtimer_start (struct ev_timer *w) |
| 603 | { |
701 | { |
| 604 | if (ev_is_active (w)) |
702 | if (ev_is_active (w)) |
| 605 | return; |
703 | return; |
| 606 | |
704 | |
| 607 | if (w->is_abs) |
705 | w->at += now; |
| 608 | { |
|
|
| 609 | /* this formula differs from the one in timer_reify becuse we do not round up */ |
|
|
| 610 | if (w->repeat) |
|
|
| 611 | w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat; |
|
|
| 612 | |
706 | |
| 613 | ev_start ((struct ev_watcher *)w, ++atimercnt); |
707 | assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); |
|
|
708 | |
|
|
709 | ev_start ((W)w, ++timercnt); |
| 614 | array_needsize (atimers, atimermax, atimercnt, ); |
710 | array_needsize (timers, timermax, timercnt, ); |
| 615 | atimers [atimercnt - 1] = w; |
711 | timers [timercnt - 1] = w; |
| 616 | upheap (atimers, atimercnt - 1); |
712 | upheap ((WT *)timers, timercnt - 1); |
| 617 | } |
|
|
| 618 | else |
|
|
| 619 | { |
|
|
| 620 | w->at += now; |
|
|
| 621 | |
|
|
| 622 | ev_start ((struct ev_watcher *)w, ++rtimercnt); |
|
|
| 623 | array_needsize (rtimers, rtimermax, rtimercnt, ); |
|
|
| 624 | rtimers [rtimercnt - 1] = w; |
|
|
| 625 | upheap (rtimers, rtimercnt - 1); |
|
|
| 626 | } |
|
|
| 627 | |
|
|
| 628 | } |
713 | } |
| 629 | |
714 | |
| 630 | void |
715 | void |
| 631 | evtimer_stop (struct ev_timer *w) |
716 | evtimer_stop (struct ev_timer *w) |
| 632 | { |
717 | { |
|
|
718 | ev_clear ((W)w); |
| 633 | if (!ev_is_active (w)) |
719 | if (!ev_is_active (w)) |
| 634 | return; |
720 | return; |
| 635 | |
721 | |
| 636 | if (w->is_abs) |
|
|
| 637 | { |
|
|
| 638 | if (w->active < atimercnt--) |
722 | if (w->active < timercnt--) |
| 639 | { |
723 | { |
| 640 | atimers [w->active - 1] = atimers [atimercnt]; |
724 | timers [w->active - 1] = timers [timercnt]; |
|
|
725 | downheap ((WT *)timers, timercnt, w->active - 1); |
|
|
726 | } |
|
|
727 | |
|
|
728 | w->at = w->repeat; |
|
|
729 | |
|
|
730 | ev_stop ((W)w); |
|
|
731 | } |
|
|
732 | |
|
|
733 | void |
|
|
734 | evtimer_again (struct ev_timer *w) |
|
|
735 | { |
|
|
736 | if (ev_is_active (w)) |
|
|
737 | { |
|
|
738 | if (w->repeat) |
|
|
739 | { |
|
|
740 | w->at = now + w->repeat; |
| 641 | downheap (atimers, atimercnt, w->active - 1); |
741 | downheap ((WT *)timers, timercnt, w->active - 1); |
| 642 | } |
|
|
| 643 | } |
|
|
| 644 | else |
|
|
| 645 | { |
|
|
| 646 | if (w->active < rtimercnt--) |
|
|
| 647 | { |
742 | } |
| 648 | rtimers [w->active - 1] = rtimers [rtimercnt]; |
743 | else |
| 649 | downheap (rtimers, rtimercnt, w->active - 1); |
744 | evtimer_stop (w); |
| 650 | } |
745 | } |
|
|
746 | else if (w->repeat) |
|
|
747 | evtimer_start (w); |
|
|
748 | } |
|
|
749 | |
|
|
750 | void |
|
|
751 | evperiodic_start (struct ev_periodic *w) |
|
|
752 | { |
|
|
753 | if (ev_is_active (w)) |
|
|
754 | return; |
|
|
755 | |
|
|
756 | assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); |
|
|
757 | |
|
|
758 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
|
|
759 | if (w->interval) |
|
|
760 | w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; |
|
|
761 | |
|
|
762 | ev_start ((W)w, ++periodiccnt); |
|
|
763 | array_needsize (periodics, periodicmax, periodiccnt, ); |
|
|
764 | periodics [periodiccnt - 1] = w; |
|
|
765 | upheap ((WT *)periodics, periodiccnt - 1); |
|
|
766 | } |
|
|
767 | |
|
|
768 | void |
|
|
769 | evperiodic_stop (struct ev_periodic *w) |
|
|
770 | { |
|
|
771 | ev_clear ((W)w); |
|
|
772 | if (!ev_is_active (w)) |
|
|
773 | return; |
|
|
774 | |
|
|
775 | if (w->active < periodiccnt--) |
| 651 | } |
776 | { |
|
|
777 | periodics [w->active - 1] = periodics [periodiccnt]; |
|
|
778 | downheap ((WT *)periodics, periodiccnt, w->active - 1); |
|
|
779 | } |
| 652 | |
780 | |
| 653 | ev_stop ((struct ev_watcher *)w); |
781 | ev_stop ((W)w); |
| 654 | } |
782 | } |
| 655 | |
783 | |
| 656 | void |
784 | void |
| 657 | evsignal_start (struct ev_signal *w) |
785 | evsignal_start (struct ev_signal *w) |
| 658 | { |
786 | { |
| 659 | if (ev_is_active (w)) |
787 | if (ev_is_active (w)) |
| 660 | return; |
788 | return; |
| 661 | |
789 | |
| 662 | ev_start ((struct ev_watcher *)w, 1); |
790 | ev_start ((W)w, 1); |
| 663 | array_needsize (signals, signalmax, w->signum, signals_init); |
791 | array_needsize (signals, signalmax, w->signum, signals_init); |
| 664 | wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w); |
792 | wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
| 665 | |
793 | |
| 666 | if (!w->next) |
794 | if (!w->next) |
| 667 | { |
795 | { |
| 668 | struct sigaction sa; |
796 | struct sigaction sa; |
| 669 | sa.sa_handler = sighandler; |
797 | sa.sa_handler = sighandler; |
| … | |
… | |
| 674 | } |
802 | } |
| 675 | |
803 | |
| 676 | void |
804 | void |
| 677 | evsignal_stop (struct ev_signal *w) |
805 | evsignal_stop (struct ev_signal *w) |
| 678 | { |
806 | { |
|
|
807 | ev_clear ((W)w); |
| 679 | if (!ev_is_active (w)) |
808 | if (!ev_is_active (w)) |
| 680 | return; |
809 | return; |
| 681 | |
810 | |
| 682 | wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w); |
811 | wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
| 683 | ev_stop ((struct ev_watcher *)w); |
812 | ev_stop ((W)w); |
| 684 | |
813 | |
| 685 | if (!signals [w->signum - 1].head) |
814 | if (!signals [w->signum - 1].head) |
| 686 | signal (w->signum, SIG_DFL); |
815 | signal (w->signum, SIG_DFL); |
| 687 | } |
816 | } |
| 688 | |
817 | |
| 689 | void evidle_start (struct ev_idle *w) |
818 | void evidle_start (struct ev_idle *w) |
| 690 | { |
819 | { |
| 691 | if (ev_is_active (w)) |
820 | if (ev_is_active (w)) |
| 692 | return; |
821 | return; |
| 693 | |
822 | |
| 694 | ev_start ((struct ev_watcher *)w, ++idlecnt); |
823 | ev_start ((W)w, ++idlecnt); |
| 695 | array_needsize (idles, idlemax, idlecnt, ); |
824 | array_needsize (idles, idlemax, idlecnt, ); |
| 696 | idles [idlecnt - 1] = w; |
825 | idles [idlecnt - 1] = w; |
| 697 | } |
826 | } |
| 698 | |
827 | |
| 699 | void evidle_stop (struct ev_idle *w) |
828 | void evidle_stop (struct ev_idle *w) |
| 700 | { |
829 | { |
|
|
830 | ev_clear ((W)w); |
|
|
831 | if (ev_is_active (w)) |
|
|
832 | return; |
|
|
833 | |
| 701 | idles [w->active - 1] = idles [--idlecnt]; |
834 | idles [w->active - 1] = idles [--idlecnt]; |
| 702 | ev_stop ((struct ev_watcher *)w); |
835 | ev_stop ((W)w); |
| 703 | } |
836 | } |
| 704 | |
837 | |
| 705 | void evcheck_start (struct ev_check *w) |
838 | void evcheck_start (struct ev_check *w) |
| 706 | { |
839 | { |
| 707 | if (ev_is_active (w)) |
840 | if (ev_is_active (w)) |
| 708 | return; |
841 | return; |
| 709 | |
842 | |
| 710 | ev_start ((struct ev_watcher *)w, ++checkcnt); |
843 | ev_start ((W)w, ++checkcnt); |
| 711 | array_needsize (checks, checkmax, checkcnt, ); |
844 | array_needsize (checks, checkmax, checkcnt, ); |
| 712 | checks [checkcnt - 1] = w; |
845 | checks [checkcnt - 1] = w; |
| 713 | } |
846 | } |
| 714 | |
847 | |
| 715 | void evcheck_stop (struct ev_check *w) |
848 | void evcheck_stop (struct ev_check *w) |
| 716 | { |
849 | { |
|
|
850 | ev_clear ((W)w); |
|
|
851 | if (ev_is_active (w)) |
|
|
852 | return; |
|
|
853 | |
| 717 | checks [w->active - 1] = checks [--checkcnt]; |
854 | checks [w->active - 1] = checks [--checkcnt]; |
| 718 | ev_stop ((struct ev_watcher *)w); |
855 | ev_stop ((W)w); |
| 719 | } |
856 | } |
| 720 | |
857 | |
| 721 | /*****************************************************************************/ |
858 | /*****************************************************************************/ |
|
|
859 | |
|
|
860 | struct ev_once |
|
|
861 | { |
|
|
862 | struct ev_io io; |
|
|
863 | struct ev_timer to; |
|
|
864 | void (*cb)(int revents, void *arg); |
|
|
865 | void *arg; |
|
|
866 | }; |
|
|
867 | |
|
|
868 | static void |
|
|
869 | once_cb (struct ev_once *once, int revents) |
|
|
870 | { |
|
|
871 | void (*cb)(int revents, void *arg) = once->cb; |
|
|
872 | void *arg = once->arg; |
|
|
873 | |
|
|
874 | evio_stop (&once->io); |
|
|
875 | evtimer_stop (&once->to); |
|
|
876 | free (once); |
|
|
877 | |
|
|
878 | cb (revents, arg); |
|
|
879 | } |
|
|
880 | |
|
|
881 | static void |
|
|
882 | once_cb_io (struct ev_io *w, int revents) |
|
|
883 | { |
|
|
884 | once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
|
|
885 | } |
|
|
886 | |
|
|
887 | static void |
|
|
888 | once_cb_to (struct ev_timer *w, int revents) |
|
|
889 | { |
|
|
890 | once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
|
|
891 | } |
|
|
892 | |
|
|
893 | void |
|
|
894 | ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
|
|
895 | { |
|
|
896 | struct ev_once *once = malloc (sizeof (struct ev_once)); |
|
|
897 | |
|
|
898 | if (!once) |
|
|
899 | cb (EV_ERROR, arg); |
|
|
900 | else |
|
|
901 | { |
|
|
902 | once->cb = cb; |
|
|
903 | once->arg = arg; |
|
|
904 | |
|
|
905 | evw_init (&once->io, once_cb_io); |
|
|
906 | |
|
|
907 | if (fd >= 0) |
|
|
908 | { |
|
|
909 | evio_set (&once->io, fd, events); |
|
|
910 | evio_start (&once->io); |
|
|
911 | } |
|
|
912 | |
|
|
913 | evw_init (&once->to, once_cb_to); |
|
|
914 | |
|
|
915 | if (timeout >= 0.) |
|
|
916 | { |
|
|
917 | evtimer_set (&once->to, timeout, 0.); |
|
|
918 | evtimer_start (&once->to); |
|
|
919 | } |
|
|
920 | } |
|
|
921 | } |
|
|
922 | |
|
|
923 | /*****************************************************************************/ |
|
|
924 | |
| 722 | #if 1 |
925 | #if 0 |
|
|
926 | |
|
|
927 | struct ev_io wio; |
| 723 | |
928 | |
| 724 | static void |
929 | static void |
| 725 | sin_cb (struct ev_io *w, int revents) |
930 | sin_cb (struct ev_io *w, int revents) |
| 726 | { |
931 | { |
| 727 | fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); |
932 | fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); |
| … | |
… | |
| 737 | |
942 | |
| 738 | static void |
943 | static void |
| 739 | scb (struct ev_signal *w, int revents) |
944 | scb (struct ev_signal *w, int revents) |
| 740 | { |
945 | { |
| 741 | fprintf (stderr, "signal %x,%d\n", revents, w->signum); |
946 | fprintf (stderr, "signal %x,%d\n", revents, w->signum); |
|
|
947 | evio_stop (&wio); |
|
|
948 | evio_start (&wio); |
| 742 | } |
949 | } |
| 743 | |
950 | |
| 744 | static void |
951 | static void |
| 745 | gcb (struct ev_signal *w, int revents) |
952 | gcb (struct ev_signal *w, int revents) |
| 746 | { |
953 | { |
| 747 | fprintf (stderr, "generic %x\n", revents); |
954 | fprintf (stderr, "generic %x\n", revents); |
|
|
955 | |
| 748 | } |
956 | } |
| 749 | |
957 | |
| 750 | int main (void) |
958 | int main (void) |
| 751 | { |
959 | { |
| 752 | struct ev_io sin; |
|
|
| 753 | |
|
|
| 754 | ev_init (0); |
960 | ev_init (0); |
| 755 | |
961 | |
| 756 | evw_init (&sin, sin_cb, 55); |
|
|
| 757 | evio_set (&sin, 0, EV_READ); |
962 | evio_init (&wio, sin_cb, 0, EV_READ); |
| 758 | evio_start (&sin); |
963 | evio_start (&wio); |
| 759 | |
964 | |
| 760 | struct ev_timer t[10000]; |
965 | struct ev_timer t[10000]; |
| 761 | |
966 | |
| 762 | #if 0 |
967 | #if 0 |
| 763 | int i; |
968 | int i; |
| 764 | for (i = 0; i < 10000; ++i) |
969 | for (i = 0; i < 10000; ++i) |
| 765 | { |
970 | { |
| 766 | struct ev_timer *w = t + i; |
971 | struct ev_timer *w = t + i; |
| 767 | evw_init (w, ocb, i); |
972 | evw_init (w, ocb, i); |
| 768 | evtimer_set_abs (w, drand48 (), 0.99775533); |
973 | evtimer_init_abs (w, ocb, drand48 (), 0.99775533); |
| 769 | evtimer_start (w); |
974 | evtimer_start (w); |
| 770 | if (drand48 () < 0.5) |
975 | if (drand48 () < 0.5) |
| 771 | evtimer_stop (w); |
976 | evtimer_stop (w); |
| 772 | } |
977 | } |
| 773 | #endif |
978 | #endif |
| 774 | |
979 | |
| 775 | struct ev_timer t1; |
980 | struct ev_timer t1; |
| 776 | evw_init (&t1, ocb, 0); |
981 | evtimer_init (&t1, ocb, 5, 10); |
| 777 | evtimer_set_abs (&t1, 5, 10); |
|
|
| 778 | evtimer_start (&t1); |
982 | evtimer_start (&t1); |
| 779 | |
983 | |
| 780 | struct ev_signal sig; |
984 | struct ev_signal sig; |
| 781 | evw_init (&sig, scb, 65535); |
|
|
| 782 | evsignal_set (&sig, SIGQUIT); |
985 | evsignal_init (&sig, scb, SIGQUIT); |
| 783 | evsignal_start (&sig); |
986 | evsignal_start (&sig); |
| 784 | |
987 | |
| 785 | struct ev_check cw; |
988 | struct ev_check cw; |
| 786 | evw_init (&cw, gcb, 0); |
989 | evcheck_init (&cw, gcb); |
| 787 | evcheck_start (&cw); |
990 | evcheck_start (&cw); |
| 788 | |
991 | |
| 789 | struct ev_idle iw; |
992 | struct ev_idle iw; |
| 790 | evw_init (&iw, gcb, 0); |
993 | evidle_init (&iw, gcb); |
| 791 | evidle_start (&iw); |
994 | evidle_start (&iw); |
| 792 | |
995 | |
| 793 | ev_loop (0); |
996 | ev_loop (0); |
| 794 | |
997 | |
| 795 | return 0; |
998 | return 0; |
