1 | /* |
1 | /* |
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2 | * libev event processing core, watcher management |
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3 | * |
2 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
4 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
3 | * All rights reserved. |
5 | * All rights reserved. |
4 | * |
6 | * |
5 | * Redistribution and use in source and binary forms, with or without |
7 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions are |
8 | * modification, are permitted provided that the following conditions are |
… | |
… | |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
26 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
28 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | */ |
30 | */ |
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31 | #if EV_USE_CONFIG_H |
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32 | # include "config.h" |
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33 | #endif |
29 | |
34 | |
30 | #include <math.h> |
35 | #include <math.h> |
31 | #include <stdlib.h> |
36 | #include <stdlib.h> |
32 | #include <unistd.h> |
37 | #include <unistd.h> |
33 | #include <fcntl.h> |
38 | #include <fcntl.h> |
… | |
… | |
41 | #include <sys/types.h> |
46 | #include <sys/types.h> |
42 | #include <sys/wait.h> |
47 | #include <sys/wait.h> |
43 | #include <sys/time.h> |
48 | #include <sys/time.h> |
44 | #include <time.h> |
49 | #include <time.h> |
45 | |
50 | |
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51 | /**/ |
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52 | |
46 | #ifndef HAVE_MONOTONIC |
53 | #ifndef EV_USE_MONOTONIC |
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54 | # define EV_USE_MONOTONIC 1 |
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55 | #endif |
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56 | |
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57 | #ifndef EV_USE_SELECT |
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58 | # define EV_USE_SELECT 1 |
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59 | #endif |
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60 | |
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61 | #ifndef EV_USE_EPOLL |
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62 | # define EV_USE_EPOLL 0 |
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63 | #endif |
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64 | |
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65 | #ifndef EV_USE_REALTIME |
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66 | # define EV_USE_REALTIME 1 |
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67 | #endif |
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68 | |
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69 | /**/ |
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70 | |
47 | # ifdef CLOCK_MONOTONIC |
71 | #ifndef CLOCK_MONOTONIC |
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72 | # undef EV_USE_MONOTONIC |
48 | # define HAVE_MONOTONIC 1 |
73 | # define EV_USE_MONOTONIC 0 |
49 | # endif |
74 | #endif |
50 | #endif |
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51 | |
75 | |
52 | #ifndef HAVE_SELECT |
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53 | # define HAVE_SELECT 1 |
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54 | #endif |
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55 | |
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56 | #ifndef HAVE_EPOLL |
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57 | # define HAVE_EPOLL 0 |
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58 | #endif |
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59 | |
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60 | #ifndef HAVE_REALTIME |
76 | #ifndef CLOCK_REALTIME |
61 | # define HAVE_REALTIME 1 /* posix requirement, but might be slower */ |
77 | # undef EV_USE_REALTIME |
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78 | # define EV_USE_REALTIME 0 |
62 | #endif |
79 | #endif |
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80 | |
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81 | /**/ |
63 | |
82 | |
64 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
83 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
65 | #define MAX_BLOCKTIME 60. |
84 | #define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ |
66 | #define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ |
85 | #define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */ |
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86 | /*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ |
67 | |
87 | |
68 | #include "ev.h" |
88 | #include "ev.h" |
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89 | |
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90 | #if __GNUC__ >= 3 |
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91 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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92 | # define inline inline |
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93 | #else |
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94 | # define expect(expr,value) (expr) |
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95 | # define inline static |
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96 | #endif |
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97 | |
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98 | #define expect_false(expr) expect ((expr) != 0, 0) |
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99 | #define expect_true(expr) expect ((expr) != 0, 1) |
69 | |
100 | |
70 | typedef struct ev_watcher *W; |
101 | typedef struct ev_watcher *W; |
71 | typedef struct ev_watcher_list *WL; |
102 | typedef struct ev_watcher_list *WL; |
72 | typedef struct ev_watcher_time *WT; |
103 | typedef struct ev_watcher_time *WT; |
73 | |
104 | |
74 | static ev_tstamp now, diff; /* monotonic clock */ |
105 | static ev_tstamp now_floor, now, diff; /* monotonic clock */ |
75 | ev_tstamp ev_now; |
106 | ev_tstamp ev_now; |
76 | int ev_method; |
107 | int ev_method; |
77 | |
108 | |
78 | static int have_monotonic; /* runtime */ |
109 | static int have_monotonic; /* runtime */ |
79 | |
110 | |
… | |
… | |
84 | /*****************************************************************************/ |
115 | /*****************************************************************************/ |
85 | |
116 | |
86 | ev_tstamp |
117 | ev_tstamp |
87 | ev_time (void) |
118 | ev_time (void) |
88 | { |
119 | { |
89 | #if HAVE_REALTIME |
120 | #if EV_USE_REALTIME |
90 | struct timespec ts; |
121 | struct timespec ts; |
91 | clock_gettime (CLOCK_REALTIME, &ts); |
122 | clock_gettime (CLOCK_REALTIME, &ts); |
92 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
123 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
93 | #else |
124 | #else |
94 | struct timeval tv; |
125 | struct timeval tv; |
… | |
… | |
98 | } |
129 | } |
99 | |
130 | |
100 | static ev_tstamp |
131 | static ev_tstamp |
101 | get_clock (void) |
132 | get_clock (void) |
102 | { |
133 | { |
103 | #if HAVE_MONOTONIC |
134 | #if EV_USE_MONOTONIC |
104 | if (have_monotonic) |
135 | if (expect_true (have_monotonic)) |
105 | { |
136 | { |
106 | struct timespec ts; |
137 | struct timespec ts; |
107 | clock_gettime (CLOCK_MONOTONIC, &ts); |
138 | clock_gettime (CLOCK_MONOTONIC, &ts); |
108 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
139 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
109 | } |
140 | } |
110 | #endif |
141 | #endif |
111 | |
142 | |
112 | return ev_time (); |
143 | return ev_time (); |
113 | } |
144 | } |
114 | |
145 | |
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146 | #define array_roundsize(base,n) ((n) | 4 & ~3) |
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147 | |
115 | #define array_needsize(base,cur,cnt,init) \ |
148 | #define array_needsize(base,cur,cnt,init) \ |
116 | if ((cnt) > cur) \ |
149 | if (expect_false ((cnt) > cur)) \ |
117 | { \ |
150 | { \ |
118 | int newcnt = cur; \ |
151 | int newcnt = cur; \ |
119 | do \ |
152 | do \ |
120 | { \ |
153 | { \ |
121 | newcnt = (newcnt << 1) | 4 & ~3; \ |
154 | newcnt = array_roundsize (base, newcnt << 1); \ |
122 | } \ |
155 | } \ |
123 | while ((cnt) > newcnt); \ |
156 | while ((cnt) > newcnt); \ |
124 | \ |
157 | \ |
125 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
158 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
126 | init (base + cur, newcnt - cur); \ |
159 | init (base + cur, newcnt - cur); \ |
… | |
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130 | /*****************************************************************************/ |
163 | /*****************************************************************************/ |
131 | |
164 | |
132 | typedef struct |
165 | typedef struct |
133 | { |
166 | { |
134 | struct ev_io *head; |
167 | struct ev_io *head; |
135 | int events; |
168 | unsigned char events; |
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169 | unsigned char reify; |
136 | } ANFD; |
170 | } ANFD; |
137 | |
171 | |
138 | static ANFD *anfds; |
172 | static ANFD *anfds; |
139 | static int anfdmax; |
173 | static int anfdmax; |
140 | |
174 | |
… | |
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143 | { |
177 | { |
144 | while (count--) |
178 | while (count--) |
145 | { |
179 | { |
146 | base->head = 0; |
180 | base->head = 0; |
147 | base->events = EV_NONE; |
181 | base->events = EV_NONE; |
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182 | base->reify = 0; |
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183 | |
148 | ++base; |
184 | ++base; |
149 | } |
185 | } |
150 | } |
186 | } |
151 | |
187 | |
152 | typedef struct |
188 | typedef struct |
… | |
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159 | static int pendingmax, pendingcnt; |
195 | static int pendingmax, pendingcnt; |
160 | |
196 | |
161 | static void |
197 | static void |
162 | event (W w, int events) |
198 | event (W w, int events) |
163 | { |
199 | { |
164 | if (w->active) |
200 | if (w->pending) |
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201 | { |
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202 | pendings [w->pending - 1].events |= events; |
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203 | return; |
165 | { |
204 | } |
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205 | |
166 | w->pending = ++pendingcnt; |
206 | w->pending = ++pendingcnt; |
167 | array_needsize (pendings, pendingmax, pendingcnt, ); |
207 | array_needsize (pendings, pendingmax, pendingcnt, ); |
168 | pendings [pendingcnt - 1].w = w; |
208 | pendings [pendingcnt - 1].w = w; |
169 | pendings [pendingcnt - 1].events = events; |
209 | pendings [pendingcnt - 1].events = events; |
170 | } |
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171 | } |
210 | } |
172 | |
211 | |
173 | static void |
212 | static void |
174 | queue_events (W *events, int eventcnt, int type) |
213 | queue_events (W *events, int eventcnt, int type) |
175 | { |
214 | { |
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213 | int events = 0; |
252 | int events = 0; |
214 | |
253 | |
215 | for (w = anfd->head; w; w = w->next) |
254 | for (w = anfd->head; w; w = w->next) |
216 | events |= w->events; |
255 | events |= w->events; |
217 | |
256 | |
218 | anfd->events &= ~EV_REIFY; |
257 | anfd->reify = 0; |
219 | |
258 | |
220 | if (anfd->events != events) |
259 | if (anfd->events != events) |
221 | { |
260 | { |
222 | method_modify (fd, anfd->events, events); |
261 | method_modify (fd, anfd->events, events); |
223 | anfd->events = events; |
262 | anfd->events = events; |
… | |
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228 | } |
267 | } |
229 | |
268 | |
230 | static void |
269 | static void |
231 | fd_change (int fd) |
270 | fd_change (int fd) |
232 | { |
271 | { |
233 | if (anfds [fd].events & EV_REIFY) |
272 | if (anfds [fd].reify || fdchangecnt < 0) |
234 | return; |
273 | return; |
235 | |
274 | |
236 | anfds [fd].events |= EV_REIFY; |
275 | anfds [fd].reify = 1; |
237 | |
276 | |
238 | ++fdchangecnt; |
277 | ++fdchangecnt; |
239 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
278 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
240 | fdchanges [fdchangecnt - 1] = fd; |
279 | fdchanges [fdchangecnt - 1] = fd; |
241 | } |
280 | } |
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249 | for (fd = 0; fd < anfdmax; ++fd) |
288 | for (fd = 0; fd < anfdmax; ++fd) |
250 | if (anfds [fd].events) |
289 | if (anfds [fd].events) |
251 | if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) |
290 | if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) |
252 | while (anfds [fd].head) |
291 | while (anfds [fd].head) |
253 | { |
292 | { |
254 | event ((W)anfds [fd].head, EV_ERROR); |
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255 | ev_io_stop (anfds [fd].head); |
293 | ev_io_stop (anfds [fd].head); |
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294 | event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE); |
256 | } |
295 | } |
257 | } |
296 | } |
258 | |
297 | |
259 | /*****************************************************************************/ |
298 | /*****************************************************************************/ |
260 | |
299 | |
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308 | /*****************************************************************************/ |
347 | /*****************************************************************************/ |
309 | |
348 | |
310 | typedef struct |
349 | typedef struct |
311 | { |
350 | { |
312 | struct ev_signal *head; |
351 | struct ev_signal *head; |
313 | sig_atomic_t gotsig; |
352 | sig_atomic_t volatile gotsig; |
314 | } ANSIG; |
353 | } ANSIG; |
315 | |
354 | |
316 | static ANSIG *signals; |
355 | static ANSIG *signals; |
317 | static int signalmax; |
356 | static int signalmax; |
318 | |
357 | |
319 | static int sigpipe [2]; |
358 | static int sigpipe [2]; |
320 | static sig_atomic_t gotsig; |
359 | static sig_atomic_t volatile gotsig; |
321 | static struct ev_io sigev; |
360 | static struct ev_io sigev; |
322 | |
361 | |
323 | static void |
362 | static void |
324 | signals_init (ANSIG *base, int count) |
363 | signals_init (ANSIG *base, int count) |
325 | { |
364 | { |
326 | while (count--) |
365 | while (count--) |
327 | { |
366 | { |
328 | base->head = 0; |
367 | base->head = 0; |
329 | base->gotsig = 0; |
368 | base->gotsig = 0; |
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369 | |
330 | ++base; |
370 | ++base; |
331 | } |
371 | } |
332 | } |
372 | } |
333 | |
373 | |
334 | static void |
374 | static void |
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337 | signals [signum - 1].gotsig = 1; |
377 | signals [signum - 1].gotsig = 1; |
338 | |
378 | |
339 | if (!gotsig) |
379 | if (!gotsig) |
340 | { |
380 | { |
341 | gotsig = 1; |
381 | gotsig = 1; |
342 | write (sigpipe [1], &gotsig, 1); |
382 | write (sigpipe [1], &signum, 1); |
343 | } |
383 | } |
344 | } |
384 | } |
345 | |
385 | |
346 | static void |
386 | static void |
347 | sigcb (struct ev_io *iow, int revents) |
387 | sigcb (struct ev_io *iow, int revents) |
348 | { |
388 | { |
349 | struct ev_signal *w; |
389 | struct ev_signal *w; |
350 | int sig; |
390 | int signum; |
351 | |
391 | |
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392 | read (sigpipe [0], &revents, 1); |
352 | gotsig = 0; |
393 | gotsig = 0; |
353 | read (sigpipe [0], &revents, 1); |
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354 | |
394 | |
355 | for (sig = signalmax; sig--; ) |
395 | for (signum = signalmax; signum--; ) |
356 | if (signals [sig].gotsig) |
396 | if (signals [signum].gotsig) |
357 | { |
397 | { |
358 | signals [sig].gotsig = 0; |
398 | signals [signum].gotsig = 0; |
359 | |
399 | |
360 | for (w = signals [sig].head; w; w = w->next) |
400 | for (w = signals [signum].head; w; w = w->next) |
361 | event ((W)w, EV_SIGNAL); |
401 | event ((W)w, EV_SIGNAL); |
362 | } |
402 | } |
363 | } |
403 | } |
364 | |
404 | |
365 | static void |
405 | static void |
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402 | struct ev_child *w; |
442 | struct ev_child *w; |
403 | int pid, status; |
443 | int pid, status; |
404 | |
444 | |
405 | while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) |
445 | while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) |
406 | for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) |
446 | for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) |
407 | if (w->pid == pid || w->pid == -1) |
447 | if (w->pid == pid || !w->pid) |
408 | { |
448 | { |
409 | w->status = status; |
449 | w->status = status; |
410 | event ((W)w, EV_CHILD); |
450 | event ((W)w, EV_CHILD); |
411 | } |
451 | } |
412 | } |
452 | } |
413 | |
453 | |
414 | /*****************************************************************************/ |
454 | /*****************************************************************************/ |
415 | |
455 | |
416 | #if HAVE_EPOLL |
456 | #if EV_USE_EPOLL |
417 | # include "ev_epoll.c" |
457 | # include "ev_epoll.c" |
418 | #endif |
458 | #endif |
419 | #if HAVE_SELECT |
459 | #if EV_USE_SELECT |
420 | # include "ev_select.c" |
460 | # include "ev_select.c" |
421 | #endif |
461 | #endif |
422 | |
462 | |
423 | int |
463 | int |
424 | ev_version_major (void) |
464 | ev_version_major (void) |
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434 | |
474 | |
435 | int ev_init (int flags) |
475 | int ev_init (int flags) |
436 | { |
476 | { |
437 | if (!ev_method) |
477 | if (!ev_method) |
438 | { |
478 | { |
439 | #if HAVE_MONOTONIC |
479 | #if EV_USE_MONOTONIC |
440 | { |
480 | { |
441 | struct timespec ts; |
481 | struct timespec ts; |
442 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
482 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
443 | have_monotonic = 1; |
483 | have_monotonic = 1; |
444 | } |
484 | } |
445 | #endif |
485 | #endif |
446 | |
486 | |
447 | ev_now = ev_time (); |
487 | ev_now = ev_time (); |
448 | now = get_clock (); |
488 | now = get_clock (); |
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489 | now_floor = now; |
449 | diff = ev_now - now; |
490 | diff = ev_now - now; |
450 | |
491 | |
451 | if (pipe (sigpipe)) |
492 | if (pipe (sigpipe)) |
452 | return 0; |
493 | return 0; |
453 | |
494 | |
454 | ev_method = EVMETHOD_NONE; |
495 | ev_method = EVMETHOD_NONE; |
455 | #if HAVE_EPOLL |
496 | #if EV_USE_EPOLL |
456 | if (ev_method == EVMETHOD_NONE) epoll_init (flags); |
497 | if (ev_method == EVMETHOD_NONE) epoll_init (flags); |
457 | #endif |
498 | #endif |
458 | #if HAVE_SELECT |
499 | #if EV_USE_SELECT |
459 | if (ev_method == EVMETHOD_NONE) select_init (flags); |
500 | if (ev_method == EVMETHOD_NONE) select_init (flags); |
460 | #endif |
501 | #endif |
461 | |
502 | |
462 | if (ev_method) |
503 | if (ev_method) |
463 | { |
504 | { |
… | |
… | |
473 | } |
514 | } |
474 | |
515 | |
475 | /*****************************************************************************/ |
516 | /*****************************************************************************/ |
476 | |
517 | |
477 | void |
518 | void |
478 | ev_prefork (void) |
519 | ev_fork_prepare (void) |
479 | { |
520 | { |
480 | /* nop */ |
521 | /* nop */ |
481 | } |
522 | } |
482 | |
523 | |
483 | void |
524 | void |
484 | ev_postfork_parent (void) |
525 | ev_fork_parent (void) |
485 | { |
526 | { |
486 | /* nop */ |
527 | /* nop */ |
487 | } |
528 | } |
488 | |
529 | |
489 | void |
530 | void |
490 | ev_postfork_child (void) |
531 | ev_fork_child (void) |
491 | { |
532 | { |
492 | #if HAVE_EPOLL |
533 | #if EV_USE_EPOLL |
493 | if (ev_method == EVMETHOD_EPOLL) |
534 | if (ev_method == EVMETHOD_EPOLL) |
494 | epoll_postfork_child (); |
535 | epoll_postfork_child (); |
495 | #endif |
536 | #endif |
496 | |
537 | |
497 | ev_io_stop (&sigev); |
538 | ev_io_stop (&sigev); |
… | |
… | |
523 | { |
564 | { |
524 | while (timercnt && timers [0]->at <= now) |
565 | while (timercnt && timers [0]->at <= now) |
525 | { |
566 | { |
526 | struct ev_timer *w = timers [0]; |
567 | struct ev_timer *w = timers [0]; |
527 | |
568 | |
528 | event ((W)w, EV_TIMEOUT); |
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529 | |
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530 | /* first reschedule or stop timer */ |
569 | /* first reschedule or stop timer */ |
531 | if (w->repeat) |
570 | if (w->repeat) |
532 | { |
571 | { |
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572 | assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
533 | w->at = now + w->repeat; |
573 | w->at = now + w->repeat; |
534 | assert (("timer timeout in the past, negative repeat?", w->at > now)); |
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535 | downheap ((WT *)timers, timercnt, 0); |
574 | downheap ((WT *)timers, timercnt, 0); |
536 | } |
575 | } |
537 | else |
576 | else |
538 | ev_timer_stop (w); /* nonrepeating: stop timer */ |
577 | ev_timer_stop (w); /* nonrepeating: stop timer */ |
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578 | |
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579 | event ((W)w, EV_TIMEOUT); |
539 | } |
580 | } |
540 | } |
581 | } |
541 | |
582 | |
542 | static void |
583 | static void |
543 | periodics_reify (void) |
584 | periodics_reify (void) |
… | |
… | |
548 | |
589 | |
549 | /* first reschedule or stop timer */ |
590 | /* first reschedule or stop timer */ |
550 | if (w->interval) |
591 | if (w->interval) |
551 | { |
592 | { |
552 | w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; |
593 | w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; |
553 | assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); |
594 | assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); |
554 | downheap ((WT *)periodics, periodiccnt, 0); |
595 | downheap ((WT *)periodics, periodiccnt, 0); |
555 | } |
596 | } |
556 | else |
597 | else |
557 | ev_periodic_stop (w); /* nonrepeating: stop timer */ |
598 | ev_periodic_stop (w); /* nonrepeating: stop timer */ |
558 | |
599 | |
559 | event ((W)w, EV_TIMEOUT); |
600 | event ((W)w, EV_PERIODIC); |
560 | } |
601 | } |
561 | } |
602 | } |
562 | |
603 | |
563 | static void |
604 | static void |
564 | periodics_reschedule (ev_tstamp diff) |
605 | periodics_reschedule (ev_tstamp diff) |
… | |
… | |
583 | } |
624 | } |
584 | } |
625 | } |
585 | } |
626 | } |
586 | } |
627 | } |
587 | |
628 | |
|
|
629 | static int |
|
|
630 | time_update_monotonic (void) |
|
|
631 | { |
|
|
632 | now = get_clock (); |
|
|
633 | |
|
|
634 | if (expect_true (now - now_floor < MIN_TIMEJUMP * .5)) |
|
|
635 | { |
|
|
636 | ev_now = now + diff; |
|
|
637 | return 0; |
|
|
638 | } |
|
|
639 | else |
|
|
640 | { |
|
|
641 | now_floor = now; |
|
|
642 | ev_now = ev_time (); |
|
|
643 | return 1; |
|
|
644 | } |
|
|
645 | } |
|
|
646 | |
588 | static void |
647 | static void |
589 | time_update (void) |
648 | time_update (void) |
590 | { |
649 | { |
591 | int i; |
650 | int i; |
592 | |
651 | |
593 | ev_now = ev_time (); |
652 | #if EV_USE_MONOTONIC |
594 | |
|
|
595 | if (have_monotonic) |
653 | if (expect_true (have_monotonic)) |
596 | { |
654 | { |
|
|
655 | if (time_update_monotonic ()) |
|
|
656 | { |
597 | ev_tstamp odiff = diff; |
657 | ev_tstamp odiff = diff; |
598 | |
658 | |
599 | for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
659 | for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
600 | { |
660 | { |
601 | now = get_clock (); |
|
|
602 | diff = ev_now - now; |
661 | diff = ev_now - now; |
603 | |
662 | |
604 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
663 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
605 | return; /* all is well */ |
664 | return; /* all is well */ |
606 | |
665 | |
607 | ev_now = ev_time (); |
666 | ev_now = ev_time (); |
|
|
667 | now = get_clock (); |
|
|
668 | now_floor = now; |
608 | } |
669 | } |
609 | |
670 | |
610 | periodics_reschedule (diff - odiff); |
671 | periodics_reschedule (diff - odiff); |
611 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
672 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
|
|
673 | } |
612 | } |
674 | } |
613 | else |
675 | else |
|
|
676 | #endif |
614 | { |
677 | { |
|
|
678 | ev_now = ev_time (); |
|
|
679 | |
615 | if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) |
680 | if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) |
616 | { |
681 | { |
617 | periodics_reschedule (ev_now - now); |
682 | periodics_reschedule (ev_now - now); |
618 | |
683 | |
619 | /* adjust timers. this is easy, as the offset is the same for all */ |
684 | /* adjust timers. this is easy, as the offset is the same for all */ |
620 | for (i = 0; i < timercnt; ++i) |
685 | for (i = 0; i < timercnt; ++i) |
… | |
… | |
633 | ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; |
698 | ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; |
634 | |
699 | |
635 | do |
700 | do |
636 | { |
701 | { |
637 | /* queue check watchers (and execute them) */ |
702 | /* queue check watchers (and execute them) */ |
638 | if (preparecnt) |
703 | if (expect_false (preparecnt)) |
639 | { |
704 | { |
640 | queue_events ((W *)prepares, preparecnt, EV_PREPARE); |
705 | queue_events ((W *)prepares, preparecnt, EV_PREPARE); |
641 | call_pending (); |
706 | call_pending (); |
642 | } |
707 | } |
643 | |
708 | |
… | |
… | |
646 | |
711 | |
647 | /* calculate blocking time */ |
712 | /* calculate blocking time */ |
648 | |
713 | |
649 | /* we only need this for !monotonic clockor timers, but as we basically |
714 | /* we only need this for !monotonic clockor timers, but as we basically |
650 | always have timers, we just calculate it always */ |
715 | always have timers, we just calculate it always */ |
|
|
716 | #if EV_USE_MONOTONIC |
|
|
717 | if (expect_true (have_monotonic)) |
|
|
718 | time_update_monotonic (); |
|
|
719 | else |
|
|
720 | #endif |
|
|
721 | { |
651 | ev_now = ev_time (); |
722 | ev_now = ev_time (); |
|
|
723 | now = ev_now; |
|
|
724 | } |
652 | |
725 | |
653 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
726 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
654 | block = 0.; |
727 | block = 0.; |
655 | else |
728 | else |
656 | { |
729 | { |
657 | block = MAX_BLOCKTIME; |
730 | block = MAX_BLOCKTIME; |
658 | |
731 | |
659 | if (timercnt) |
732 | if (timercnt) |
660 | { |
733 | { |
661 | ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; |
734 | ev_tstamp to = timers [0]->at - now + method_fudge; |
662 | if (block > to) block = to; |
735 | if (block > to) block = to; |
663 | } |
736 | } |
664 | |
737 | |
665 | if (periodiccnt) |
738 | if (periodiccnt) |
666 | { |
739 | { |
… | |
… | |
719 | head = &(*head)->next; |
792 | head = &(*head)->next; |
720 | } |
793 | } |
721 | } |
794 | } |
722 | |
795 | |
723 | static void |
796 | static void |
724 | ev_clear (W w) |
797 | ev_clear_pending (W w) |
725 | { |
798 | { |
726 | if (w->pending) |
799 | if (w->pending) |
727 | { |
800 | { |
728 | pendings [w->pending - 1].w = 0; |
801 | pendings [w->pending - 1].w = 0; |
729 | w->pending = 0; |
802 | w->pending = 0; |
… | |
… | |
745 | /*****************************************************************************/ |
818 | /*****************************************************************************/ |
746 | |
819 | |
747 | void |
820 | void |
748 | ev_io_start (struct ev_io *w) |
821 | ev_io_start (struct ev_io *w) |
749 | { |
822 | { |
|
|
823 | int fd = w->fd; |
|
|
824 | |
750 | if (ev_is_active (w)) |
825 | if (ev_is_active (w)) |
751 | return; |
826 | return; |
752 | |
827 | |
753 | int fd = w->fd; |
828 | assert (("ev_io_start called with negative fd", fd >= 0)); |
754 | |
829 | |
755 | ev_start ((W)w, 1); |
830 | ev_start ((W)w, 1); |
756 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
831 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
757 | wlist_add ((WL *)&anfds[fd].head, (WL)w); |
832 | wlist_add ((WL *)&anfds[fd].head, (WL)w); |
758 | |
833 | |
… | |
… | |
760 | } |
835 | } |
761 | |
836 | |
762 | void |
837 | void |
763 | ev_io_stop (struct ev_io *w) |
838 | ev_io_stop (struct ev_io *w) |
764 | { |
839 | { |
765 | ev_clear ((W)w); |
840 | ev_clear_pending ((W)w); |
766 | if (!ev_is_active (w)) |
841 | if (!ev_is_active (w)) |
767 | return; |
842 | return; |
768 | |
843 | |
769 | wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
844 | wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
770 | ev_stop ((W)w); |
845 | ev_stop ((W)w); |
… | |
… | |
778 | if (ev_is_active (w)) |
853 | if (ev_is_active (w)) |
779 | return; |
854 | return; |
780 | |
855 | |
781 | w->at += now; |
856 | w->at += now; |
782 | |
857 | |
783 | assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); |
858 | assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
784 | |
859 | |
785 | ev_start ((W)w, ++timercnt); |
860 | ev_start ((W)w, ++timercnt); |
786 | array_needsize (timers, timermax, timercnt, ); |
861 | array_needsize (timers, timermax, timercnt, ); |
787 | timers [timercnt - 1] = w; |
862 | timers [timercnt - 1] = w; |
788 | upheap ((WT *)timers, timercnt - 1); |
863 | upheap ((WT *)timers, timercnt - 1); |
789 | } |
864 | } |
790 | |
865 | |
791 | void |
866 | void |
792 | ev_timer_stop (struct ev_timer *w) |
867 | ev_timer_stop (struct ev_timer *w) |
793 | { |
868 | { |
794 | ev_clear ((W)w); |
869 | ev_clear_pending ((W)w); |
795 | if (!ev_is_active (w)) |
870 | if (!ev_is_active (w)) |
796 | return; |
871 | return; |
797 | |
872 | |
798 | if (w->active < timercnt--) |
873 | if (w->active < timercnt--) |
799 | { |
874 | { |
… | |
… | |
827 | ev_periodic_start (struct ev_periodic *w) |
902 | ev_periodic_start (struct ev_periodic *w) |
828 | { |
903 | { |
829 | if (ev_is_active (w)) |
904 | if (ev_is_active (w)) |
830 | return; |
905 | return; |
831 | |
906 | |
832 | assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); |
907 | assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); |
833 | |
908 | |
834 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
909 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
835 | if (w->interval) |
910 | if (w->interval) |
836 | w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; |
911 | w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; |
837 | |
912 | |
… | |
… | |
842 | } |
917 | } |
843 | |
918 | |
844 | void |
919 | void |
845 | ev_periodic_stop (struct ev_periodic *w) |
920 | ev_periodic_stop (struct ev_periodic *w) |
846 | { |
921 | { |
847 | ev_clear ((W)w); |
922 | ev_clear_pending ((W)w); |
848 | if (!ev_is_active (w)) |
923 | if (!ev_is_active (w)) |
849 | return; |
924 | return; |
850 | |
925 | |
851 | if (w->active < periodiccnt--) |
926 | if (w->active < periodiccnt--) |
852 | { |
927 | { |
… | |
… | |
860 | void |
935 | void |
861 | ev_signal_start (struct ev_signal *w) |
936 | ev_signal_start (struct ev_signal *w) |
862 | { |
937 | { |
863 | if (ev_is_active (w)) |
938 | if (ev_is_active (w)) |
864 | return; |
939 | return; |
|
|
940 | |
|
|
941 | assert (("ev_signal_start called with illegal signal number", w->signum > 0)); |
865 | |
942 | |
866 | ev_start ((W)w, 1); |
943 | ev_start ((W)w, 1); |
867 | array_needsize (signals, signalmax, w->signum, signals_init); |
944 | array_needsize (signals, signalmax, w->signum, signals_init); |
868 | wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
945 | wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
869 | |
946 | |
… | |
… | |
878 | } |
955 | } |
879 | |
956 | |
880 | void |
957 | void |
881 | ev_signal_stop (struct ev_signal *w) |
958 | ev_signal_stop (struct ev_signal *w) |
882 | { |
959 | { |
883 | ev_clear ((W)w); |
960 | ev_clear_pending ((W)w); |
884 | if (!ev_is_active (w)) |
961 | if (!ev_is_active (w)) |
885 | return; |
962 | return; |
886 | |
963 | |
887 | wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
964 | wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
888 | ev_stop ((W)w); |
965 | ev_stop ((W)w); |
… | |
… | |
903 | } |
980 | } |
904 | |
981 | |
905 | void |
982 | void |
906 | ev_idle_stop (struct ev_idle *w) |
983 | ev_idle_stop (struct ev_idle *w) |
907 | { |
984 | { |
908 | ev_clear ((W)w); |
985 | ev_clear_pending ((W)w); |
909 | if (ev_is_active (w)) |
986 | if (ev_is_active (w)) |
910 | return; |
987 | return; |
911 | |
988 | |
912 | idles [w->active - 1] = idles [--idlecnt]; |
989 | idles [w->active - 1] = idles [--idlecnt]; |
913 | ev_stop ((W)w); |
990 | ev_stop ((W)w); |
… | |
… | |
925 | } |
1002 | } |
926 | |
1003 | |
927 | void |
1004 | void |
928 | ev_prepare_stop (struct ev_prepare *w) |
1005 | ev_prepare_stop (struct ev_prepare *w) |
929 | { |
1006 | { |
930 | ev_clear ((W)w); |
1007 | ev_clear_pending ((W)w); |
931 | if (ev_is_active (w)) |
1008 | if (ev_is_active (w)) |
932 | return; |
1009 | return; |
933 | |
1010 | |
934 | prepares [w->active - 1] = prepares [--preparecnt]; |
1011 | prepares [w->active - 1] = prepares [--preparecnt]; |
935 | ev_stop ((W)w); |
1012 | ev_stop ((W)w); |
… | |
… | |
947 | } |
1024 | } |
948 | |
1025 | |
949 | void |
1026 | void |
950 | ev_check_stop (struct ev_check *w) |
1027 | ev_check_stop (struct ev_check *w) |
951 | { |
1028 | { |
952 | ev_clear ((W)w); |
1029 | ev_clear_pending ((W)w); |
953 | if (ev_is_active (w)) |
1030 | if (ev_is_active (w)) |
954 | return; |
1031 | return; |
955 | |
1032 | |
956 | checks [w->active - 1] = checks [--checkcnt]; |
1033 | checks [w->active - 1] = checks [--checkcnt]; |
957 | ev_stop ((W)w); |
1034 | ev_stop ((W)w); |
… | |
… | |
968 | } |
1045 | } |
969 | |
1046 | |
970 | void |
1047 | void |
971 | ev_child_stop (struct ev_child *w) |
1048 | ev_child_stop (struct ev_child *w) |
972 | { |
1049 | { |
973 | ev_clear ((W)w); |
1050 | ev_clear_pending ((W)w); |
974 | if (ev_is_active (w)) |
1051 | if (ev_is_active (w)) |
975 | return; |
1052 | return; |
976 | |
1053 | |
977 | wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
1054 | wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
978 | ev_stop ((W)w); |
1055 | ev_stop ((W)w); |
… | |
… | |
1017 | ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
1094 | ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
1018 | { |
1095 | { |
1019 | struct ev_once *once = malloc (sizeof (struct ev_once)); |
1096 | struct ev_once *once = malloc (sizeof (struct ev_once)); |
1020 | |
1097 | |
1021 | if (!once) |
1098 | if (!once) |
1022 | cb (EV_ERROR, arg); |
1099 | cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
1023 | else |
1100 | else |
1024 | { |
1101 | { |
1025 | once->cb = cb; |
1102 | once->cb = cb; |
1026 | once->arg = arg; |
1103 | once->arg = arg; |
1027 | |
1104 | |
1028 | ev_watcher_init (&once->io, once_cb_io); |
1105 | ev_watcher_init (&once->io, once_cb_io); |
1029 | |
|
|
1030 | if (fd >= 0) |
1106 | if (fd >= 0) |
1031 | { |
1107 | { |
1032 | ev_io_set (&once->io, fd, events); |
1108 | ev_io_set (&once->io, fd, events); |
1033 | ev_io_start (&once->io); |
1109 | ev_io_start (&once->io); |
1034 | } |
1110 | } |
1035 | |
1111 | |
1036 | ev_watcher_init (&once->to, once_cb_to); |
1112 | ev_watcher_init (&once->to, once_cb_to); |
1037 | |
|
|
1038 | if (timeout >= 0.) |
1113 | if (timeout >= 0.) |
1039 | { |
1114 | { |
1040 | ev_timer_set (&once->to, timeout, 0.); |
1115 | ev_timer_set (&once->to, timeout, 0.); |
1041 | ev_timer_start (&once->to); |
1116 | ev_timer_start (&once->to); |
1042 | } |
1117 | } |