1 | /* |
1 | /* |
2 | * libev native API header |
2 | * libev native API header |
3 | * |
3 | * |
4 | * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de> |
5 | * All rights reserved. |
5 | * All rights reserved. |
6 | * |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
8 | * tion, are permitted provided that the following conditions are met: |
8 | * tion, are permitted provided that the following conditions are met: |
9 | * |
9 | * |
… | |
… | |
88 | #endif |
88 | #endif |
89 | |
89 | |
90 | /*****************************************************************************/ |
90 | /*****************************************************************************/ |
91 | |
91 | |
92 | #if EV_STAT_ENABLE |
92 | #if EV_STAT_ENABLE |
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93 | # ifdef _WIN32 |
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94 | # include <time.h> |
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95 | # include <sys/types.h> |
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96 | # endif |
93 | # include <sys/stat.h> |
97 | # include <sys/stat.h> |
94 | #endif |
98 | #endif |
95 | |
99 | |
96 | /* support multiple event loops? */ |
100 | /* support multiple event loops? */ |
97 | #if EV_MULTIPLICITY |
101 | #if EV_MULTIPLICITY |
… | |
… | |
123 | #endif |
127 | #endif |
124 | |
128 | |
125 | /*****************************************************************************/ |
129 | /*****************************************************************************/ |
126 | |
130 | |
127 | /* eventmask, revents, events... */ |
131 | /* eventmask, revents, events... */ |
128 | #define EV_UNDEF -1L /* guaranteed to be invalid */ |
132 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
129 | #define EV_NONE 0x00L /* no events */ |
133 | #define EV_NONE 0x00 /* no events */ |
130 | #define EV_READ 0x01L /* ev_io detected read will not block */ |
134 | #define EV_READ 0x01 /* ev_io detected read will not block */ |
131 | #define EV_WRITE 0x02L /* ev_io detected write will not block */ |
135 | #define EV_WRITE 0x02 /* ev_io detected write will not block */ |
132 | #define EV_IOFDSET 0x80L /* internal use only */ |
136 | #define EV__IOFDSET 0x80 /* internal use only */ |
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137 | #define EV_IO EV_READ /* alias for type-detection */ |
133 | #define EV_TIMEOUT 0x00000100L /* timer timed out */ |
138 | #define EV_TIMEOUT 0x00000100 /* timer timed out */ |
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139 | #define EV_TIMER EV_TIMEOUT /* alias for type-detection */ |
134 | #define EV_PERIODIC 0x00000200L /* periodic timer timed out */ |
140 | #define EV_PERIODIC 0x00000200 /* periodic timer timed out */ |
135 | #define EV_SIGNAL 0x00000400L /* signal was received */ |
141 | #define EV_SIGNAL 0x00000400 /* signal was received */ |
136 | #define EV_CHILD 0x00000800L /* child/pid had status change */ |
142 | #define EV_CHILD 0x00000800 /* child/pid had status change */ |
137 | #define EV_STAT 0x00001000L /* stat data changed */ |
143 | #define EV_STAT 0x00001000 /* stat data changed */ |
138 | #define EV_IDLE 0x00002000L /* event loop is idling */ |
144 | #define EV_IDLE 0x00002000 /* event loop is idling */ |
139 | #define EV_PREPARE 0x00004000L /* event loop about to poll */ |
145 | #define EV_PREPARE 0x00004000 /* event loop about to poll */ |
140 | #define EV_CHECK 0x00008000L /* event loop finished poll */ |
146 | #define EV_CHECK 0x00008000 /* event loop finished poll */ |
141 | #define EV_EMBED 0x00010000L /* embedded event loop needs sweep */ |
147 | #define EV_EMBED 0x00010000 /* embedded event loop needs sweep */ |
142 | #define EV_FORK 0x00020000L /* event loop resumed in child */ |
148 | #define EV_FORK 0x00020000 /* event loop resumed in child */ |
143 | #define EV_ASYNC 0x00040000L /* async intra-loop signal */ |
149 | #define EV_ASYNC 0x00040000 /* async intra-loop signal */ |
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150 | #define EV_CUSTOM 0x01000000 /* for use by user code */ |
144 | #define EV_ERROR 0x80000000L /* sent when an error occurs */ |
151 | #define EV_ERROR 0x80000000 /* sent when an error occurs */ |
145 | |
152 | |
146 | /* can be used to add custom fields to all watchers, while losing binary compatibility */ |
153 | /* can be used to add custom fields to all watchers, while losing binary compatibility */ |
147 | #ifndef EV_COMMON |
154 | #ifndef EV_COMMON |
148 | # define EV_COMMON void *data; |
155 | # define EV_COMMON void *data; |
149 | #endif |
156 | #endif |
… | |
… | |
161 | # define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents)) |
168 | # define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents)) |
162 | #endif |
169 | #endif |
163 | |
170 | |
164 | /* |
171 | /* |
165 | * struct member types: |
172 | * struct member types: |
166 | * private: you can look at them, but not change them, and they might not mean anything to you. |
173 | * private: you may look at them, but not change them, |
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174 | * and they might not mean anything to you. |
167 | * ro: can be read anytime, but only changed when the watcher isn't active |
175 | * ro: can be read anytime, but only changed when the watcher isn't active. |
168 | * rw: can be read and modified anytime, even when the watcher is active |
176 | * rw: can be read and modified anytime, even when the watcher is active. |
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177 | * |
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178 | * some internal details that might be helpful for debugging: |
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179 | * |
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180 | * active is either 0, which means the watcher is not active, |
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181 | * or the array index of the watcher (periodics, timers) |
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182 | * or the array index + 1 (most other watchers) |
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183 | * or simply 1 for watchers that aren't in some array. |
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184 | * pending is either 0, in which case the watcher isn't, |
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185 | * or the array index + 1 in the pendings array. |
169 | */ |
186 | */ |
170 | |
187 | |
171 | /* shared by all watchers */ |
188 | /* shared by all watchers */ |
172 | #define EV_WATCHER(type) \ |
189 | #define EV_WATCHER(type) \ |
173 | int active; /* private */ \ |
190 | int active; /* private */ \ |
… | |
… | |
322 | ev_prepare prepare; /* private */ |
339 | ev_prepare prepare; /* private */ |
323 | ev_check check; /* unused */ |
340 | ev_check check; /* unused */ |
324 | ev_timer timer; /* unused */ |
341 | ev_timer timer; /* unused */ |
325 | ev_periodic periodic; /* unused */ |
342 | ev_periodic periodic; /* unused */ |
326 | ev_idle idle; /* unused */ |
343 | ev_idle idle; /* unused */ |
327 | ev_fork fork; /* unused */ |
344 | ev_fork fork; /* private */ |
328 | } ev_embed; |
345 | } ev_embed; |
329 | #endif |
346 | #endif |
330 | |
347 | |
331 | #if EV_ASYNC_ENABLE |
348 | #if EV_ASYNC_ENABLE |
332 | /* invoked when somebody calls ev_async_send on the watcher */ |
349 | /* invoked when somebody calls ev_async_send on the watcher */ |
… | |
… | |
371 | #endif |
388 | #endif |
372 | }; |
389 | }; |
373 | |
390 | |
374 | /* bits for ev_default_loop and ev_loop_new */ |
391 | /* bits for ev_default_loop and ev_loop_new */ |
375 | /* the default */ |
392 | /* the default */ |
376 | #define EVFLAG_AUTO 0x00000000UL /* not quite a mask */ |
393 | #define EVFLAG_AUTO 0x00000000U /* not quite a mask */ |
377 | /* flag bits */ |
394 | /* flag bits */ |
378 | #define EVFLAG_NOENV 0x01000000UL /* do NOT consult environment */ |
395 | #define EVFLAG_NOENV 0x01000000U /* do NOT consult environment */ |
379 | #define EVFLAG_FORKCHECK 0x02000000UL /* check for a fork in each iteration */ |
396 | #define EVFLAG_FORKCHECK 0x02000000U /* check for a fork in each iteration */ |
380 | /* method bits to be ored together */ |
397 | /* method bits to be ored together */ |
381 | #define EVBACKEND_SELECT 0x00000001UL /* about anywhere */ |
398 | #define EVBACKEND_SELECT 0x00000001U /* about anywhere */ |
382 | #define EVBACKEND_POLL 0x00000002UL /* !win */ |
399 | #define EVBACKEND_POLL 0x00000002U /* !win */ |
383 | #define EVBACKEND_EPOLL 0x00000004UL /* linux */ |
400 | #define EVBACKEND_EPOLL 0x00000004U /* linux */ |
384 | #define EVBACKEND_KQUEUE 0x00000008UL /* bsd */ |
401 | #define EVBACKEND_KQUEUE 0x00000008U /* bsd */ |
385 | #define EVBACKEND_DEVPOLL 0x00000010UL /* solaris 8 */ /* NYI */ |
402 | #define EVBACKEND_DEVPOLL 0x00000010U /* solaris 8 */ /* NYI */ |
386 | #define EVBACKEND_PORT 0x00000020UL /* solaris 10 */ |
403 | #define EVBACKEND_PORT 0x00000020U /* solaris 10 */ |
387 | |
404 | |
388 | #if EV_PROTOTYPES |
405 | #if EV_PROTOTYPES |
389 | int ev_version_major (void); |
406 | int ev_version_major (void); |
390 | int ev_version_minor (void); |
407 | int ev_version_minor (void); |
391 | |
408 | |
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408 | * retryable syscall error |
425 | * retryable syscall error |
409 | * (such as failed select, poll, epoll_wait) |
426 | * (such as failed select, poll, epoll_wait) |
410 | */ |
427 | */ |
411 | void ev_set_syserr_cb (void (*cb)(const char *msg)); |
428 | void ev_set_syserr_cb (void (*cb)(const char *msg)); |
412 | |
429 | |
413 | # if EV_MULTIPLICITY |
430 | #if EV_MULTIPLICITY |
414 | EV_INLINE struct ev_loop * |
431 | EV_INLINE struct ev_loop * |
415 | ev_default_loop_uc (void) |
432 | ev_default_loop_uc (void) |
416 | { |
433 | { |
417 | extern struct ev_loop *ev_default_loop_ptr; |
434 | extern struct ev_loop *ev_default_loop_ptr; |
418 | |
435 | |
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438 | |
455 | |
439 | /* create and destroy alternative loops that don't handle signals */ |
456 | /* create and destroy alternative loops that don't handle signals */ |
440 | struct ev_loop *ev_loop_new (unsigned int flags); |
457 | struct ev_loop *ev_loop_new (unsigned int flags); |
441 | void ev_loop_destroy (EV_P); |
458 | void ev_loop_destroy (EV_P); |
442 | void ev_loop_fork (EV_P); |
459 | void ev_loop_fork (EV_P); |
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460 | void ev_loop_verify (EV_P); |
443 | |
461 | |
444 | ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */ |
462 | ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */ |
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463 | void ev_now_update (EV_P); |
445 | |
464 | |
446 | # else |
465 | #else |
447 | |
466 | |
448 | int ev_default_loop (unsigned int flags); /* returns true when successful */ |
467 | int ev_default_loop (unsigned int flags); /* returns true when successful */ |
449 | |
468 | |
450 | EV_INLINE ev_tstamp |
469 | EV_INLINE ev_tstamp |
451 | ev_now (void) |
470 | ev_now (void) |
452 | { |
471 | { |
453 | extern ev_tstamp ev_rt_now; |
472 | extern ev_tstamp ev_rt_now; |
454 | |
473 | |
455 | return ev_rt_now; |
474 | return ev_rt_now; |
456 | } |
475 | } |
457 | # endif |
476 | #endif /* multiplicity */ |
458 | |
477 | |
459 | EV_INLINE int |
478 | EV_INLINE int |
460 | ev_is_default_loop (EV_P) |
479 | ev_is_default_loop (EV_P) |
461 | { |
480 | { |
462 | #if EV_MULTIPLICITY |
481 | #if EV_MULTIPLICITY |
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473 | /* if you create alternative loops you have to call ev_loop_fork on them */ |
492 | /* if you create alternative loops you have to call ev_loop_fork on them */ |
474 | /* you can call it in either the parent or the child */ |
493 | /* you can call it in either the parent or the child */ |
475 | /* you can actually call it at any time, anywhere :) */ |
494 | /* you can actually call it at any time, anywhere :) */ |
476 | void ev_default_fork (void); |
495 | void ev_default_fork (void); |
477 | |
496 | |
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497 | #if 0 |
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498 | /* walk (almost) all watchers in the loop of a given type, invoking the */ |
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499 | /* callback on every such watcher. The callback might stop the watcher, */ |
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500 | /* but do nothing else with the loop */ |
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501 | void ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)); |
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502 | #endif |
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503 | |
478 | unsigned int ev_backend (EV_P); /* backend in use by loop */ |
504 | unsigned int ev_backend (EV_P); /* backend in use by loop */ |
479 | unsigned int ev_loop_count (EV_P); /* number of loop iterations */ |
505 | unsigned int ev_loop_count (EV_P); /* number of loop iterations */ |
480 | #endif |
506 | #endif /* prototypes */ |
481 | |
507 | |
482 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
508 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
483 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
509 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
484 | #define EVUNLOOP_CANCEL 0 /* undo unloop */ |
510 | #define EVUNLOOP_CANCEL 0 /* undo unloop */ |
485 | #define EVUNLOOP_ONE 1 /* unloop once */ |
511 | #define EVUNLOOP_ONE 1 /* unloop once */ |
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498 | * should not keep ev_loop from running, unref() after starting, and ref() before stopping. |
524 | * should not keep ev_loop from running, unref() after starting, and ref() before stopping. |
499 | */ |
525 | */ |
500 | void ev_ref (EV_P); |
526 | void ev_ref (EV_P); |
501 | void ev_unref (EV_P); |
527 | void ev_unref (EV_P); |
502 | |
528 | |
503 | /* convinience function, wait for a single event, without registering an event watcher */ |
529 | /* convenience function, wait for a single event, without registering an event watcher */ |
504 | /* if timeout is < 0, do wait indefinitely */ |
530 | /* if timeout is < 0, do wait indefinitely */ |
505 | void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
531 | void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
506 | #endif |
532 | #endif |
507 | |
533 | |
508 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
534 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
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512 | ((ev_watcher *)(void *)(ev))->pending = \ |
538 | ((ev_watcher *)(void *)(ev))->pending = \ |
513 | ((ev_watcher *)(void *)(ev))->priority = 0; \ |
539 | ((ev_watcher *)(void *)(ev))->priority = 0; \ |
514 | ev_set_cb ((ev), cb_); \ |
540 | ev_set_cb ((ev), cb_); \ |
515 | } while (0) |
541 | } while (0) |
516 | |
542 | |
517 | #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_) | EV_IOFDSET; } while (0) |
543 | #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_) | EV__IOFDSET; } while (0) |
518 | #define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
544 | #define ev_timer_set(ev,after_,repeat_) do { ((ev_watcher_time *)(ev))->at = (after_); (ev)->repeat = (repeat_); } while (0) |
519 | #define ev_periodic_set(ev,ofs_,ival_,res_) do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb= (res_); } while (0) |
545 | #define ev_periodic_set(ev,ofs_,ival_,rcb_) do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb = (rcb_); } while (0) |
520 | #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
546 | #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
521 | #define ev_child_set(ev,pid_,trace_) do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0) |
547 | #define ev_child_set(ev,pid_,trace_) do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0) |
522 | #define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0) |
548 | #define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0) |
523 | #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ |
549 | #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ |
524 | #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ |
550 | #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ |
525 | #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ |
551 | #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ |
526 | #define ev_embed_set(ev,other_) do { (ev)->other = (other_); } while (0) |
552 | #define ev_embed_set(ev,other_) do { (ev)->other = (other_); } while (0) |
527 | #define ev_fork_set(ev) /* nop, yes, this is a serious in-joke */ |
553 | #define ev_fork_set(ev) /* nop, yes, this is a serious in-joke */ |
528 | #define ev_async_set(ev) do { (ev)->sent = 0; } while (0) |
554 | #define ev_async_set(ev) do { (ev)->sent = 0; } while (0) |
529 | |
555 | |
530 | #define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) |
556 | #define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) |
531 | #define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) |
557 | #define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) |
532 | #define ev_periodic_init(ev,cb,at,ival,res) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(at),(ival),(res)); } while (0) |
558 | #define ev_periodic_init(ev,cb,ofs,ival,rcb) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(ofs),(ival),(rcb)); } while (0) |
533 | #define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) |
559 | #define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) |
534 | #define ev_child_init(ev,cb,pid,trace) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid),(trace)); } while (0) |
560 | #define ev_child_init(ev,cb,pid,trace) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid),(trace)); } while (0) |
535 | #define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0) |
561 | #define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0) |
536 | #define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) |
562 | #define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) |
537 | #define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
563 | #define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
538 | #define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
564 | #define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
539 | #define ev_embed_init(ev,cb,other) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0) |
565 | #define ev_embed_init(ev,cb,other) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0) |
540 | #define ev_fork_init(ev,cb) do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0) |
566 | #define ev_fork_init(ev,cb) do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0) |
541 | #define ev_async_init(ev,cb) do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0) |
567 | #define ev_async_init(ev,cb) do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0) |
542 | |
568 | |
543 | #define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */ |
569 | #define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */ |
544 | #define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */ |
570 | #define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */ |
545 | |
571 | |
546 | #define ev_priority(ev) ((((ev_watcher *)(void *)(ev))->priority) + 0) |
572 | #define ev_priority(ev) ((((ev_watcher *)(void *)(ev))->priority) + 0) |
547 | #define ev_cb(ev) (ev)->cb /* rw */ |
573 | #define ev_cb(ev) (ev)->cb /* rw */ |
548 | #define ev_set_priority(ev,pri) ((ev_watcher *)(void *)(ev))->priority = (pri) |
574 | #define ev_set_priority(ev,pri) ((ev_watcher *)(void *)(ev))->priority = (pri) |
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575 | |
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576 | #define ev_periodic_at(ev) (((ev_watcher_time *)(ev))->at + 0.) |
549 | |
577 | |
550 | #ifndef ev_set_cb |
578 | #ifndef ev_set_cb |
551 | # define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_) |
579 | # define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_) |
552 | #endif |
580 | #endif |
553 | |
581 | |
554 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
582 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
555 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
583 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
556 | #if EV_PROTOTYPES |
584 | #if EV_PROTOTYPES |