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46 | #include <sys/types.h> |
46 | #include <sys/types.h> |
47 | #include <sys/wait.h> |
47 | #include <sys/wait.h> |
48 | #include <sys/time.h> |
48 | #include <sys/time.h> |
49 | #include <time.h> |
49 | #include <time.h> |
50 | |
50 | |
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51 | /**/ |
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52 | |
51 | #ifndef EV_USE_MONOTONIC |
53 | #ifndef EV_USE_MONOTONIC |
52 | # define EV_USE_MONOTONIC 1 |
54 | # define EV_USE_MONOTONIC 1 |
53 | #endif |
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_POLL |
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62 | # define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ |
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63 | #endif |
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64 | |
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65 | #ifndef EV_USE_EPOLL |
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66 | # define EV_USE_EPOLL 0 |
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67 | #endif |
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68 | |
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69 | #ifndef EV_USE_REALTIME |
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70 | # define EV_USE_REALTIME 1 |
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71 | #endif |
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72 | |
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73 | /**/ |
54 | |
74 | |
55 | #ifndef CLOCK_MONOTONIC |
75 | #ifndef CLOCK_MONOTONIC |
56 | # undef EV_USE_MONOTONIC |
76 | # undef EV_USE_MONOTONIC |
57 | # define EV_USE_MONOTONIC 0 |
77 | # define EV_USE_MONOTONIC 0 |
58 | #endif |
78 | #endif |
59 | |
79 | |
60 | #ifndef EV_USE_SELECT |
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61 | # define EV_USE_SELECT 1 |
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62 | #endif |
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63 | |
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64 | #ifndef EV_USE_EPOLL |
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65 | # define EV_USE_EPOLL 0 |
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66 | #endif |
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67 | |
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68 | #ifndef CLOCK_REALTIME |
80 | #ifndef CLOCK_REALTIME |
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81 | # undef EV_USE_REALTIME |
69 | # define EV_USE_REALTIME 0 |
82 | # define EV_USE_REALTIME 0 |
70 | #endif |
83 | #endif |
71 | #ifndef EV_USE_REALTIME |
84 | |
72 | # define EV_USE_REALTIME 1 /* posix requirement, but might be slower */ |
85 | /**/ |
73 | #endif |
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74 | |
86 | |
75 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
87 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
76 | #define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */ |
88 | #define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ |
77 | #define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */ |
89 | #define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */ |
78 | #define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */ |
90 | /*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ |
79 | |
91 | |
80 | #include "ev.h" |
92 | #include "ev.h" |
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93 | |
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94 | #if __GNUC__ >= 3 |
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95 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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96 | # define inline inline |
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97 | #else |
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98 | # define expect(expr,value) (expr) |
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99 | # define inline static |
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100 | #endif |
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101 | |
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102 | #define expect_false(expr) expect ((expr) != 0, 0) |
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103 | #define expect_true(expr) expect ((expr) != 0, 1) |
81 | |
104 | |
82 | typedef struct ev_watcher *W; |
105 | typedef struct ev_watcher *W; |
83 | typedef struct ev_watcher_list *WL; |
106 | typedef struct ev_watcher_list *WL; |
84 | typedef struct ev_watcher_time *WT; |
107 | typedef struct ev_watcher_time *WT; |
85 | |
108 | |
86 | static ev_tstamp now, diff; /* monotonic clock */ |
109 | static ev_tstamp now_floor, now, diff; /* monotonic clock */ |
87 | ev_tstamp ev_now; |
110 | ev_tstamp ev_now; |
88 | int ev_method; |
111 | int ev_method; |
89 | |
112 | |
90 | static int have_monotonic; /* runtime */ |
113 | static int have_monotonic; /* runtime */ |
91 | |
114 | |
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111 | |
134 | |
112 | static ev_tstamp |
135 | static ev_tstamp |
113 | get_clock (void) |
136 | get_clock (void) |
114 | { |
137 | { |
115 | #if EV_USE_MONOTONIC |
138 | #if EV_USE_MONOTONIC |
116 | if (have_monotonic) |
139 | if (expect_true (have_monotonic)) |
117 | { |
140 | { |
118 | struct timespec ts; |
141 | struct timespec ts; |
119 | clock_gettime (CLOCK_MONOTONIC, &ts); |
142 | clock_gettime (CLOCK_MONOTONIC, &ts); |
120 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
143 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
121 | } |
144 | } |
… | |
… | |
125 | } |
148 | } |
126 | |
149 | |
127 | #define array_roundsize(base,n) ((n) | 4 & ~3) |
150 | #define array_roundsize(base,n) ((n) | 4 & ~3) |
128 | |
151 | |
129 | #define array_needsize(base,cur,cnt,init) \ |
152 | #define array_needsize(base,cur,cnt,init) \ |
130 | if ((cnt) > cur) \ |
153 | if (expect_false ((cnt) > cur)) \ |
131 | { \ |
154 | { \ |
132 | int newcnt = cur; \ |
155 | int newcnt = cur; \ |
133 | do \ |
156 | do \ |
134 | { \ |
157 | { \ |
135 | newcnt = array_roundsize (base, newcnt << 1); \ |
158 | newcnt = array_roundsize (base, newcnt << 1); \ |
… | |
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258 | ++fdchangecnt; |
281 | ++fdchangecnt; |
259 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
282 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
260 | fdchanges [fdchangecnt - 1] = fd; |
283 | fdchanges [fdchangecnt - 1] = fd; |
261 | } |
284 | } |
262 | |
285 | |
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286 | static void |
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287 | fd_kill (int fd) |
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288 | { |
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289 | struct ev_io *w; |
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290 | |
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291 | printf ("killing fd %d\n", fd);//D |
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292 | while ((w = anfds [fd].head)) |
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293 | { |
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294 | ev_io_stop (w); |
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295 | event ((W)w, EV_ERROR | EV_READ | EV_WRITE); |
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296 | } |
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297 | } |
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298 | |
263 | /* called on EBADF to verify fds */ |
299 | /* called on EBADF to verify fds */ |
264 | static void |
300 | static void |
265 | fd_recheck (void) |
301 | fd_ebadf (void) |
266 | { |
302 | { |
267 | int fd; |
303 | int fd; |
268 | |
304 | |
269 | for (fd = 0; fd < anfdmax; ++fd) |
305 | for (fd = 0; fd < anfdmax; ++fd) |
270 | if (anfds [fd].events) |
306 | if (anfds [fd].events) |
271 | if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) |
307 | if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) |
272 | while (anfds [fd].head) |
308 | fd_kill (fd); |
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309 | } |
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310 | |
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311 | /* called on ENOMEM in select/poll to kill some fds and retry */ |
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312 | static void |
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313 | fd_enomem (void) |
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314 | { |
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315 | int fd = anfdmax; |
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316 | |
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317 | while (fd--) |
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318 | if (anfds [fd].events) |
273 | { |
319 | { |
274 | ev_io_stop (anfds [fd].head); |
320 | close (fd); |
275 | event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE); |
321 | fd_kill (fd); |
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322 | return; |
276 | } |
323 | } |
277 | } |
324 | } |
278 | |
325 | |
279 | /*****************************************************************************/ |
326 | /*****************************************************************************/ |
280 | |
327 | |
281 | static struct ev_timer **timers; |
328 | static struct ev_timer **timers; |
… | |
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366 | |
413 | |
367 | static void |
414 | static void |
368 | sigcb (struct ev_io *iow, int revents) |
415 | sigcb (struct ev_io *iow, int revents) |
369 | { |
416 | { |
370 | struct ev_signal *w; |
417 | struct ev_signal *w; |
371 | int sig; |
418 | int signum; |
372 | |
419 | |
373 | read (sigpipe [0], &revents, 1); |
420 | read (sigpipe [0], &revents, 1); |
374 | gotsig = 0; |
421 | gotsig = 0; |
375 | |
422 | |
376 | for (sig = signalmax; sig--; ) |
423 | for (signum = signalmax; signum--; ) |
377 | if (signals [sig].gotsig) |
424 | if (signals [signum].gotsig) |
378 | { |
425 | { |
379 | signals [sig].gotsig = 0; |
426 | signals [signum].gotsig = 0; |
380 | |
427 | |
381 | for (w = signals [sig].head; w; w = w->next) |
428 | for (w = signals [signum].head; w; w = w->next) |
382 | event ((W)w, EV_SIGNAL); |
429 | event ((W)w, EV_SIGNAL); |
383 | } |
430 | } |
384 | } |
431 | } |
385 | |
432 | |
386 | static void |
433 | static void |
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423 | struct ev_child *w; |
470 | struct ev_child *w; |
424 | int pid, status; |
471 | int pid, status; |
425 | |
472 | |
426 | while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) |
473 | while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) |
427 | for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) |
474 | for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) |
428 | if (w->pid == pid || w->pid == -1) |
475 | if (w->pid == pid || !w->pid) |
429 | { |
476 | { |
430 | w->status = status; |
477 | w->status = status; |
431 | event ((W)w, EV_CHILD); |
478 | event ((W)w, EV_CHILD); |
432 | } |
479 | } |
433 | } |
480 | } |
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435 | /*****************************************************************************/ |
482 | /*****************************************************************************/ |
436 | |
483 | |
437 | #if EV_USE_EPOLL |
484 | #if EV_USE_EPOLL |
438 | # include "ev_epoll.c" |
485 | # include "ev_epoll.c" |
439 | #endif |
486 | #endif |
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487 | #if EV_USE_POLL |
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488 | # include "ev_poll.c" |
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489 | #endif |
440 | #if EV_USE_SELECT |
490 | #if EV_USE_SELECT |
441 | # include "ev_select.c" |
491 | # include "ev_select.c" |
442 | #endif |
492 | #endif |
443 | |
493 | |
444 | int |
494 | int |
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451 | ev_version_minor (void) |
501 | ev_version_minor (void) |
452 | { |
502 | { |
453 | return EV_VERSION_MINOR; |
503 | return EV_VERSION_MINOR; |
454 | } |
504 | } |
455 | |
505 | |
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506 | /* return true if we are running with elevated privileges and ignore env variables */ |
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507 | static int |
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508 | enable_secure () |
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509 | { |
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510 | return getuid () != geteuid () |
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511 | || getgid () != getegid (); |
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512 | } |
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513 | |
456 | int ev_init (int flags) |
514 | int ev_init (int methods) |
457 | { |
515 | { |
458 | if (!ev_method) |
516 | if (!ev_method) |
459 | { |
517 | { |
460 | #if EV_USE_MONOTONIC |
518 | #if EV_USE_MONOTONIC |
461 | { |
519 | { |
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463 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
521 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
464 | have_monotonic = 1; |
522 | have_monotonic = 1; |
465 | } |
523 | } |
466 | #endif |
524 | #endif |
467 | |
525 | |
468 | ev_now = ev_time (); |
526 | ev_now = ev_time (); |
469 | now = get_clock (); |
527 | now = get_clock (); |
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528 | now_floor = now; |
470 | diff = ev_now - now; |
529 | diff = ev_now - now; |
471 | |
530 | |
472 | if (pipe (sigpipe)) |
531 | if (pipe (sigpipe)) |
473 | return 0; |
532 | return 0; |
474 | |
533 | |
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534 | if (methods == EVMETHOD_AUTO) |
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535 | if (!enable_secure () && getenv ("LIBEV_METHODS")) |
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536 | methods = atoi (getenv ("LIBEV_METHODS")); |
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537 | else |
475 | ev_method = EVMETHOD_NONE; |
538 | methods = EVMETHOD_ANY; |
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539 | |
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540 | ev_method = 0; |
476 | #if EV_USE_EPOLL |
541 | #if EV_USE_EPOLL |
477 | if (ev_method == EVMETHOD_NONE) epoll_init (flags); |
542 | if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods); |
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543 | #endif |
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544 | #if EV_USE_POLL |
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545 | if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods); |
478 | #endif |
546 | #endif |
479 | #if EV_USE_SELECT |
547 | #if EV_USE_SELECT |
480 | if (ev_method == EVMETHOD_NONE) select_init (flags); |
548 | if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods); |
481 | #endif |
549 | #endif |
482 | |
550 | |
483 | if (ev_method) |
551 | if (ev_method) |
484 | { |
552 | { |
485 | ev_watcher_init (&sigev, sigcb); |
553 | ev_watcher_init (&sigev, sigcb); |
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604 | } |
672 | } |
605 | } |
673 | } |
606 | } |
674 | } |
607 | } |
675 | } |
608 | |
676 | |
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677 | static int |
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678 | time_update_monotonic (void) |
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679 | { |
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680 | now = get_clock (); |
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681 | |
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682 | if (expect_true (now - now_floor < MIN_TIMEJUMP * .5)) |
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683 | { |
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684 | ev_now = now + diff; |
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685 | return 0; |
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686 | } |
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687 | else |
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688 | { |
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689 | now_floor = now; |
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690 | ev_now = ev_time (); |
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691 | return 1; |
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692 | } |
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693 | } |
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694 | |
609 | static void |
695 | static void |
610 | time_update (void) |
696 | time_update (void) |
611 | { |
697 | { |
612 | int i; |
698 | int i; |
613 | |
699 | |
614 | ev_now = ev_time (); |
700 | #if EV_USE_MONOTONIC |
615 | |
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616 | if (have_monotonic) |
701 | if (expect_true (have_monotonic)) |
617 | { |
702 | { |
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703 | if (time_update_monotonic ()) |
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704 | { |
618 | ev_tstamp odiff = diff; |
705 | ev_tstamp odiff = diff; |
619 | |
706 | |
620 | for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
707 | for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
621 | { |
708 | { |
622 | now = get_clock (); |
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623 | diff = ev_now - now; |
709 | diff = ev_now - now; |
624 | |
710 | |
625 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
711 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
626 | return; /* all is well */ |
712 | return; /* all is well */ |
627 | |
713 | |
628 | ev_now = ev_time (); |
714 | ev_now = ev_time (); |
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715 | now = get_clock (); |
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716 | now_floor = now; |
629 | } |
717 | } |
630 | |
718 | |
631 | periodics_reschedule (diff - odiff); |
719 | periodics_reschedule (diff - odiff); |
632 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
720 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
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721 | } |
633 | } |
722 | } |
634 | else |
723 | else |
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724 | #endif |
635 | { |
725 | { |
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726 | ev_now = ev_time (); |
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727 | |
636 | if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) |
728 | if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) |
637 | { |
729 | { |
638 | periodics_reschedule (ev_now - now); |
730 | periodics_reschedule (ev_now - now); |
639 | |
731 | |
640 | /* adjust timers. this is easy, as the offset is the same for all */ |
732 | /* adjust timers. this is easy, as the offset is the same for all */ |
641 | for (i = 0; i < timercnt; ++i) |
733 | for (i = 0; i < timercnt; ++i) |
… | |
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654 | ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; |
746 | ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; |
655 | |
747 | |
656 | do |
748 | do |
657 | { |
749 | { |
658 | /* queue check watchers (and execute them) */ |
750 | /* queue check watchers (and execute them) */ |
659 | if (preparecnt) |
751 | if (expect_false (preparecnt)) |
660 | { |
752 | { |
661 | queue_events ((W *)prepares, preparecnt, EV_PREPARE); |
753 | queue_events ((W *)prepares, preparecnt, EV_PREPARE); |
662 | call_pending (); |
754 | call_pending (); |
663 | } |
755 | } |
664 | |
756 | |
… | |
… | |
667 | |
759 | |
668 | /* calculate blocking time */ |
760 | /* calculate blocking time */ |
669 | |
761 | |
670 | /* we only need this for !monotonic clockor timers, but as we basically |
762 | /* we only need this for !monotonic clockor timers, but as we basically |
671 | always have timers, we just calculate it always */ |
763 | always have timers, we just calculate it always */ |
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764 | #if EV_USE_MONOTONIC |
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765 | if (expect_true (have_monotonic)) |
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766 | time_update_monotonic (); |
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767 | else |
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768 | #endif |
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769 | { |
672 | ev_now = ev_time (); |
770 | ev_now = ev_time (); |
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771 | now = ev_now; |
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772 | } |
673 | |
773 | |
674 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
774 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
675 | block = 0.; |
775 | block = 0.; |
676 | else |
776 | else |
677 | { |
777 | { |
678 | block = MAX_BLOCKTIME; |
778 | block = MAX_BLOCKTIME; |
679 | |
779 | |
680 | if (timercnt) |
780 | if (timercnt) |
681 | { |
781 | { |
682 | ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; |
782 | ev_tstamp to = timers [0]->at - now + method_fudge; |
683 | if (block > to) block = to; |
783 | if (block > to) block = to; |
684 | } |
784 | } |
685 | |
785 | |
686 | if (periodiccnt) |
786 | if (periodiccnt) |
687 | { |
787 | { |