Mirror of :pserver:anonymous@cvs.schmorp.de/schmorpforge libev http://software.schmorp.de/pkg/libev.html
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  1. /*
  2. * libev native API header
  3. *
  4. * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
  5. * All rights reserved.
  6. *
  7. * Redistribution and use in source and binary forms, with or without modifica-
  8. * tion, are permitted provided that the following conditions are met:
  9. *
  10. * 1. Redistributions of source code must retain the above copyright notice,
  11. * this list of conditions and the following disclaimer.
  12. *
  13. * 2. Redistributions in binary form must reproduce the above copyright
  14. * notice, this list of conditions and the following disclaimer in the
  15. * documentation and/or other materials provided with the distribution.
  16. *
  17. * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  18. * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
  19. * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
  20. * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
  21. * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  22. * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  23. * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  24. * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
  25. * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  26. * OF THE POSSIBILITY OF SUCH DAMAGE.
  27. *
  28. * Alternatively, the contents of this file may be used under the terms of
  29. * the GNU General Public License ("GPL") version 2 or any later version,
  30. * in which case the provisions of the GPL are applicable instead of
  31. * the above. If you wish to allow the use of your version of this file
  32. * only under the terms of the GPL and not to allow others to use your
  33. * version of this file under the BSD license, indicate your decision
  34. * by deleting the provisions above and replace them with the notice
  35. * and other provisions required by the GPL. If you do not delete the
  36. * provisions above, a recipient may use your version of this file under
  37. * either the BSD or the GPL.
  38. */
  39. #ifndef EV_H_
  40. #define EV_H_
  41. #ifdef __cplusplus
  42. extern "C" {
  43. #endif
  44. /*****************************************************************************/
  45. #ifndef EV_FEATURES
  46. # define EV_FEATURES 0x3f
  47. #endif
  48. #define EV_FEATURE_CODE ((EV_FEATURES) & 1)
  49. #define EV_FEATURE_DATA ((EV_FEATURES) & 2)
  50. #define EV_FEATURE_CONFIG ((EV_FEATURES) & 4)
  51. #define EV_FEATURE_API ((EV_FEATURES) & 8)
  52. #define EV_FEATURE_WATCHERS ((EV_FEATURES) & 16)
  53. #define EV_FEATURE_BACKENDS ((EV_FEATURES) & 32)
  54. #define EV_FEATURE_OS ((EV_FEATURES) & 64)
  55. /* these priorities are inclusive, higher priorities will be called earlier */
  56. #ifndef EV_MINPRI
  57. # define EV_MINPRI (EV_FEATURE_CONFIG ? -2 : 0)
  58. #endif
  59. #ifndef EV_MAXPRI
  60. # define EV_MAXPRI (EV_FEATURE_CONFIG ? +2 : 0)
  61. #endif
  62. #ifndef EV_MULTIPLICITY
  63. # define EV_MULTIPLICITY EV_FEATURE_CONFIG
  64. #endif
  65. #ifndef EV_PERIODIC_ENABLE
  66. # define EV_PERIODIC_ENABLE EV_FEATURE_WATCHERS
  67. #endif
  68. #ifndef EV_STAT_ENABLE
  69. # define EV_STAT_ENABLE EV_FEATURE_WATCHERS
  70. #endif
  71. #ifndef EV_PREPARE_ENABLE
  72. # define EV_PREPARE_ENABLE EV_FEATURE_WATCHERS
  73. #endif
  74. #ifndef EV_CHECK_ENABLE
  75. # define EV_CHECK_ENABLE EV_FEATURE_WATCHERS
  76. #endif
  77. #ifndef EV_IDLE_ENABLE
  78. # define EV_IDLE_ENABLE EV_FEATURE_WATCHERS
  79. #endif
  80. #ifndef EV_FORK_ENABLE
  81. # define EV_FORK_ENABLE EV_FEATURE_WATCHERS
  82. #endif
  83. #ifndef EV_SIGNAL_ENABLE
  84. # define EV_SIGNAL_ENABLE EV_FEATURE_WATCHERS
  85. #endif
  86. #ifndef EV_CHILD_ENABLE
  87. # ifdef _WIN32
  88. # define EV_CHILD_ENABLE 0
  89. # else
  90. # define EV_CHILD_ENABLE EV_FEATURE_WATCHERS
  91. #endif
  92. #endif
  93. #ifndef EV_ASYNC_ENABLE
  94. # define EV_ASYNC_ENABLE EV_FEATURE_WATCHERS
  95. #endif
  96. #ifndef EV_EMBED_ENABLE
  97. # define EV_EMBED_ENABLE EV_FEATURE_WATCHERS
  98. #endif
  99. #ifndef EV_WALK_ENABLE
  100. # define EV_WALK_ENABLE 0 /* not yet */
  101. #endif
  102. /*****************************************************************************/
  103. #if EV_CHILD_ENABLE && !EV_SIGNAL_ENABLE
  104. # undef EV_SIGNAL_ENABLE
  105. # define EV_SIGNAL_ENABLE 1
  106. #endif
  107. /*****************************************************************************/
  108. typedef double ev_tstamp;
  109. #ifndef EV_ATOMIC_T
  110. # include <signal.h>
  111. # define EV_ATOMIC_T sig_atomic_t volatile
  112. #endif
  113. #if EV_STAT_ENABLE
  114. # ifdef _WIN32
  115. # include <time.h>
  116. # include <sys/types.h>
  117. # endif
  118. # include <sys/stat.h>
  119. #endif
  120. /* support multiple event loops? */
  121. #if EV_MULTIPLICITY
  122. struct ev_loop;
  123. # define EV_P struct ev_loop *loop
  124. # define EV_P_ EV_P,
  125. # define EV_A loop
  126. # define EV_A_ EV_A,
  127. # define EV_DEFAULT_UC ev_default_loop_uc ()
  128. # define EV_DEFAULT_UC_ EV_DEFAULT_UC,
  129. # define EV_DEFAULT ev_default_loop (0)
  130. # define EV_DEFAULT_ EV_DEFAULT,
  131. #else
  132. # define EV_P void
  133. # define EV_P_
  134. # define EV_A
  135. # define EV_A_
  136. # define EV_DEFAULT
  137. # define EV_DEFAULT_
  138. # define EV_DEFAULT_UC
  139. # define EV_DEFAULT_UC_
  140. # undef EV_EMBED_ENABLE
  141. #endif
  142. #if __STDC_VERSION__ >= 199901L || __GNUC__ >= 3
  143. # define EV_INLINE static inline
  144. #else
  145. # define EV_INLINE static
  146. #endif
  147. /*****************************************************************************/
  148. /* eventmask, revents, events... */
  149. #define EV_UNDEF -1 /* guaranteed to be invalid */
  150. #define EV_NONE 0x00 /* no events */
  151. #define EV_READ 0x01 /* ev_io detected read will not block */
  152. #define EV_WRITE 0x02 /* ev_io detected write will not block */
  153. #define EV__IOFDSET 0x80 /* internal use only */
  154. #define EV_IO EV_READ /* alias for type-detection */
  155. #define EV_TIMEOUT 0x00000100 /* timer timed out */
  156. #define EV_TIMER EV_TIMEOUT /* alias for type-detection */
  157. #define EV_PERIODIC 0x00000200 /* periodic timer timed out */
  158. #define EV_SIGNAL 0x00000400 /* signal was received */
  159. #define EV_CHILD 0x00000800 /* child/pid had status change */
  160. #define EV_STAT 0x00001000 /* stat data changed */
  161. #define EV_IDLE 0x00002000 /* event loop is idling */
  162. #define EV_PREPARE 0x00004000 /* event loop about to poll */
  163. #define EV_CHECK 0x00008000 /* event loop finished poll */
  164. #define EV_EMBED 0x00010000 /* embedded event loop needs sweep */
  165. #define EV_FORK 0x00020000 /* event loop resumed in child */
  166. #define EV_ASYNC 0x00040000 /* async intra-loop signal */
  167. #define EV_CUSTOM 0x01000000 /* for use by user code */
  168. #define EV_ERROR 0x80000000 /* sent when an error occurs */
  169. /* can be used to add custom fields to all watchers, while losing binary compatibility */
  170. #ifndef EV_COMMON
  171. # define EV_COMMON void *data;
  172. #endif
  173. #ifndef EV_PROTOTYPES
  174. # define EV_PROTOTYPES 1
  175. #endif
  176. #define EV_VERSION_MAJOR 3
  177. #define EV_VERSION_MINOR 9
  178. #ifndef EV_CB_DECLARE
  179. # define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents);
  180. #endif
  181. #ifndef EV_CB_INVOKE
  182. # define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents))
  183. #endif
  184. /*
  185. * struct member types:
  186. * private: you may look at them, but not change them,
  187. * and they might not mean anything to you.
  188. * ro: can be read anytime, but only changed when the watcher isn't active.
  189. * rw: can be read and modified anytime, even when the watcher is active.
  190. *
  191. * some internal details that might be helpful for debugging:
  192. *
  193. * active is either 0, which means the watcher is not active,
  194. * or the array index of the watcher (periodics, timers)
  195. * or the array index + 1 (most other watchers)
  196. * or simply 1 for watchers that aren't in some array.
  197. * pending is either 0, in which case the watcher isn't,
  198. * or the array index + 1 in the pendings array.
  199. */
  200. #if EV_MINPRI == EV_MAXPRI
  201. # define EV_DECL_PRIORITY
  202. #else
  203. # define EV_DECL_PRIORITY int priority;
  204. #endif
  205. /* shared by all watchers */
  206. #define EV_WATCHER(type) \
  207. int active; /* private */ \
  208. int pending; /* private */ \
  209. EV_DECL_PRIORITY /* private */ \
  210. EV_COMMON /* rw */ \
  211. EV_CB_DECLARE (type) /* private */
  212. #define EV_WATCHER_LIST(type) \
  213. EV_WATCHER (type) \
  214. struct ev_watcher_list *next; /* private */
  215. #define EV_WATCHER_TIME(type) \
  216. EV_WATCHER (type) \
  217. ev_tstamp at; /* private */
  218. /* base class, nothing to see here unless you subclass */
  219. typedef struct ev_watcher
  220. {
  221. EV_WATCHER (ev_watcher)
  222. } ev_watcher;
  223. /* base class, nothing to see here unless you subclass */
  224. typedef struct ev_watcher_list
  225. {
  226. EV_WATCHER_LIST (ev_watcher_list)
  227. } ev_watcher_list;
  228. /* base class, nothing to see here unless you subclass */
  229. typedef struct ev_watcher_time
  230. {
  231. EV_WATCHER_TIME (ev_watcher_time)
  232. } ev_watcher_time;
  233. /* invoked when fd is either EV_READable or EV_WRITEable */
  234. /* revent EV_READ, EV_WRITE */
  235. typedef struct ev_io
  236. {
  237. EV_WATCHER_LIST (ev_io)
  238. int fd; /* ro */
  239. int events; /* ro */
  240. } ev_io;
  241. /* invoked after a specific time, repeatable (based on monotonic clock) */
  242. /* revent EV_TIMEOUT */
  243. typedef struct ev_timer
  244. {
  245. EV_WATCHER_TIME (ev_timer)
  246. ev_tstamp repeat; /* rw */
  247. } ev_timer;
  248. /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */
  249. /* revent EV_PERIODIC */
  250. typedef struct ev_periodic
  251. {
  252. EV_WATCHER_TIME (ev_periodic)
  253. ev_tstamp offset; /* rw */
  254. ev_tstamp interval; /* rw */
  255. ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */
  256. } ev_periodic;
  257. /* invoked when the given signal has been received */
  258. /* revent EV_SIGNAL */
  259. typedef struct ev_signal
  260. {
  261. EV_WATCHER_LIST (ev_signal)
  262. int signum; /* ro */
  263. } ev_signal;
  264. /* invoked when sigchld is received and waitpid indicates the given pid */
  265. /* revent EV_CHILD */
  266. /* does not support priorities */
  267. typedef struct ev_child
  268. {
  269. EV_WATCHER_LIST (ev_child)
  270. int flags; /* private */
  271. int pid; /* ro */
  272. int rpid; /* rw, holds the received pid */
  273. int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */
  274. } ev_child;
  275. #if EV_STAT_ENABLE
  276. /* st_nlink = 0 means missing file or other error */
  277. # ifdef _WIN32
  278. typedef struct _stati64 ev_statdata;
  279. # else
  280. typedef struct stat ev_statdata;
  281. # endif
  282. /* invoked each time the stat data changes for a given path */
  283. /* revent EV_STAT */
  284. typedef struct ev_stat
  285. {
  286. EV_WATCHER_LIST (ev_stat)
  287. ev_timer timer; /* private */
  288. ev_tstamp interval; /* ro */
  289. const char *path; /* ro */
  290. ev_statdata prev; /* ro */
  291. ev_statdata attr; /* ro */
  292. int wd; /* wd for inotify, fd for kqueue */
  293. } ev_stat;
  294. #endif
  295. #if EV_IDLE_ENABLE
  296. /* invoked when the nothing else needs to be done, keeps the process from blocking */
  297. /* revent EV_IDLE */
  298. typedef struct ev_idle
  299. {
  300. EV_WATCHER (ev_idle)
  301. } ev_idle;
  302. #endif
  303. /* invoked for each run of the mainloop, just before the blocking call */
  304. /* you can still change events in any way you like */
  305. /* revent EV_PREPARE */
  306. typedef struct ev_prepare
  307. {
  308. EV_WATCHER (ev_prepare)
  309. } ev_prepare;
  310. /* invoked for each run of the mainloop, just after the blocking call */
  311. /* revent EV_CHECK */
  312. typedef struct ev_check
  313. {
  314. EV_WATCHER (ev_check)
  315. } ev_check;
  316. #if EV_FORK_ENABLE
  317. /* the callback gets invoked before check in the child process when a fork was detected */
  318. typedef struct ev_fork
  319. {
  320. EV_WATCHER (ev_fork)
  321. } ev_fork;
  322. #endif
  323. #if EV_EMBED_ENABLE
  324. /* used to embed an event loop inside another */
  325. /* the callback gets invoked when the event loop has handled events, and can be 0 */
  326. typedef struct ev_embed
  327. {
  328. EV_WATCHER (ev_embed)
  329. struct ev_loop *other; /* ro */
  330. ev_io io; /* private */
  331. ev_prepare prepare; /* private */
  332. ev_check check; /* unused */
  333. ev_timer timer; /* unused */
  334. ev_periodic periodic; /* unused */
  335. ev_idle idle; /* unused */
  336. ev_fork fork; /* private */
  337. } ev_embed;
  338. #endif
  339. #if EV_ASYNC_ENABLE
  340. /* invoked when somebody calls ev_async_send on the watcher */
  341. /* revent EV_ASYNC */
  342. typedef struct ev_async
  343. {
  344. EV_WATCHER (ev_async)
  345. EV_ATOMIC_T sent; /* private */
  346. } ev_async;
  347. # define ev_async_pending(w) (+(w)->sent)
  348. #endif
  349. /* the presence of this union forces similar struct layout */
  350. union ev_any_watcher
  351. {
  352. struct ev_watcher w;
  353. struct ev_watcher_list wl;
  354. struct ev_io io;
  355. struct ev_timer timer;
  356. struct ev_periodic periodic;
  357. struct ev_signal signal;
  358. struct ev_child child;
  359. #if EV_STAT_ENABLE
  360. struct ev_stat stat;
  361. #endif
  362. #if EV_IDLE_ENABLE
  363. struct ev_idle idle;
  364. #endif
  365. struct ev_prepare prepare;
  366. struct ev_check check;
  367. #if EV_FORK_ENABLE
  368. struct ev_fork fork;
  369. #endif
  370. #if EV_EMBED_ENABLE
  371. struct ev_embed embed;
  372. #endif
  373. #if EV_ASYNC_ENABLE
  374. struct ev_async async;
  375. #endif
  376. };
  377. /* bits for ev_default_loop and ev_loop_new */
  378. /* the default */
  379. #define EVFLAG_AUTO 0x00000000U /* not quite a mask */
  380. /* flag bits */
  381. #define EVFLAG_NOENV 0x01000000U /* do NOT consult environment */
  382. #define EVFLAG_FORKCHECK 0x02000000U /* check for a fork in each iteration */
  383. /* debugging/feature disable */
  384. #define EVFLAG_NOINOTIFY 0x00100000U /* do not attempt to use inotify */
  385. #define EVFLAG_NOSIGFD 0 /* compatibility to pre-3.9 */
  386. #define EVFLAG_SIGNALFD 0x00200000U /* attempt to use signalfd */
  387. /* method bits to be ored together */
  388. #define EVBACKEND_SELECT 0x00000001U /* about anywhere */
  389. #define EVBACKEND_POLL 0x00000002U /* !win */
  390. #define EVBACKEND_EPOLL 0x00000004U /* linux */
  391. #define EVBACKEND_KQUEUE 0x00000008U /* bsd */
  392. #define EVBACKEND_DEVPOLL 0x00000010U /* solaris 8 */ /* NYI */
  393. #define EVBACKEND_PORT 0x00000020U /* solaris 10 */
  394. #define EVBACKEND_ALL 0x0000003FU
  395. #if EV_PROTOTYPES
  396. int ev_version_major (void);
  397. int ev_version_minor (void);
  398. unsigned int ev_supported_backends (void);
  399. unsigned int ev_recommended_backends (void);
  400. unsigned int ev_embeddable_backends (void);
  401. ev_tstamp ev_time (void);
  402. void ev_sleep (ev_tstamp delay); /* sleep for a while */
  403. /* Sets the allocation function to use, works like realloc.
  404. * It is used to allocate and free memory.
  405. * If it returns zero when memory needs to be allocated, the library might abort
  406. * or take some potentially destructive action.
  407. * The default is your system realloc function.
  408. */
  409. void ev_set_allocator (void *(*cb)(void *ptr, long size));
  410. /* set the callback function to call on a
  411. * retryable syscall error
  412. * (such as failed select, poll, epoll_wait)
  413. */
  414. void ev_set_syserr_cb (void (*cb)(const char *msg));
  415. #if EV_MULTIPLICITY
  416. EV_INLINE struct ev_loop *
  417. ev_default_loop_uc (void)
  418. {
  419. extern struct ev_loop *ev_default_loop_ptr;
  420. return ev_default_loop_ptr;
  421. }
  422. /* the default loop is the only one that handles signals and child watchers */
  423. /* you can call this as often as you like */
  424. EV_INLINE struct ev_loop *
  425. ev_default_loop (unsigned int flags)
  426. {
  427. struct ev_loop *loop = ev_default_loop_uc ();
  428. if (!loop)
  429. {
  430. extern struct ev_loop *ev_default_loop_init (unsigned int flags);
  431. loop = ev_default_loop_init (flags);
  432. }
  433. return loop;
  434. }
  435. /* create and destroy alternative loops that don't handle signals */
  436. struct ev_loop *ev_loop_new (unsigned int flags);
  437. void ev_loop_destroy (EV_P);
  438. void ev_loop_fork (EV_P);
  439. ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */
  440. #else
  441. int ev_default_loop (unsigned int flags); /* returns true when successful */
  442. EV_INLINE ev_tstamp
  443. ev_now (void)
  444. {
  445. extern ev_tstamp ev_rt_now;
  446. return ev_rt_now;
  447. }
  448. #endif /* multiplicity */
  449. EV_INLINE int
  450. ev_is_default_loop (EV_P)
  451. {
  452. #if EV_MULTIPLICITY
  453. extern struct ev_loop *ev_default_loop_ptr;
  454. return !!(EV_A == ev_default_loop_ptr);
  455. #else
  456. return 1;
  457. #endif
  458. }
  459. void ev_default_destroy (void); /* destroy the default loop */
  460. /* this needs to be called after fork, to duplicate the default loop */
  461. /* if you create alternative loops you have to call ev_loop_fork on them */
  462. /* you can call it in either the parent or the child */
  463. /* you can actually call it at any time, anywhere :) */
  464. void ev_default_fork (void);
  465. unsigned int ev_backend (EV_P); /* backend in use by loop */
  466. void ev_now_update (EV_P); /* update event loop time */
  467. #if EV_WALK_ENABLE
  468. /* walk (almost) all watchers in the loop of a given type, invoking the */
  469. /* callback on every such watcher. The callback might stop the watcher, */
  470. /* but do nothing else with the loop */
  471. void ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w));
  472. #endif
  473. #endif /* prototypes */
  474. #define EVLOOP_NONBLOCK 1 /* do not block/wait */
  475. #define EVLOOP_ONESHOT 2 /* block *once* only */
  476. #define EVUNLOOP_CANCEL 0 /* undo unloop */
  477. #define EVUNLOOP_ONE 1 /* unloop once */
  478. #define EVUNLOOP_ALL 2 /* unloop all loops */
  479. #if EV_PROTOTYPES
  480. void ev_loop (EV_P_ int flags);
  481. void ev_unloop (EV_P_ int how); /* set to 1 to break out of event loop, set to 2 to break out of all event loops */
  482. /*
  483. * ref/unref can be used to add or remove a refcount on the mainloop. every watcher
  484. * keeps one reference. if you have a long-running watcher you never unregister that
  485. * should not keep ev_loop from running, unref() after starting, and ref() before stopping.
  486. */
  487. void ev_ref (EV_P);
  488. void ev_unref (EV_P);
  489. /*
  490. * convenience function, wait for a single event, without registering an event watcher
  491. * if timeout is < 0, do wait indefinitely
  492. */
  493. void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg);
  494. # if EV_FEATURE_API
  495. unsigned int ev_loop_count (EV_P); /* number of loop iterations */
  496. unsigned int ev_loop_depth (EV_P); /* #ev_loop enters - #ev_loop leaves */
  497. void ev_loop_verify (EV_P); /* abort if loop data corrupted */
  498. void ev_set_io_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */
  499. void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */
  500. /* advanced stuff for threading etc. support, see docs */
  501. void ev_set_userdata (EV_P_ void *data);
  502. void *ev_userdata (EV_P);
  503. void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P));
  504. void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P));
  505. unsigned int ev_pending_count (EV_P); /* number of pending events, if any */
  506. void ev_invoke_pending (EV_P); /* invoke all pending watchers */
  507. /*
  508. * stop/start the timer handling.
  509. */
  510. void ev_suspend (EV_P);
  511. void ev_resume (EV_P);
  512. #endif
  513. #endif
  514. /* these may evaluate ev multiple times, and the other arguments at most once */
  515. /* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */
  516. #define ev_init(ev,cb_) do { \
  517. ((ev_watcher *)(void *)(ev))->active = \
  518. ((ev_watcher *)(void *)(ev))->pending = 0; \
  519. ev_set_priority ((ev), 0); \
  520. ev_set_cb ((ev), cb_); \
  521. } while (0)
  522. #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_) | EV__IOFDSET; } while (0)
  523. #define ev_timer_set(ev,after_,repeat_) do { ((ev_watcher_time *)(ev))->at = (after_); (ev)->repeat = (repeat_); } while (0)
  524. #define ev_periodic_set(ev,ofs_,ival_,rcb_) do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb = (rcb_); } while (0)
  525. #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0)
  526. #define ev_child_set(ev,pid_,trace_) do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0)
  527. #define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0)
  528. #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */
  529. #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */
  530. #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */
  531. #define ev_embed_set(ev,other_) do { (ev)->other = (other_); } while (0)
  532. #define ev_fork_set(ev) /* nop, yes, this is a serious in-joke */
  533. #define ev_async_set(ev) do { (ev)->sent = 0; } while (0)
  534. #define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0)
  535. #define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0)
  536. #define ev_periodic_init(ev,cb,ofs,ival,rcb) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(ofs),(ival),(rcb)); } while (0)
  537. #define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0)
  538. #define ev_child_init(ev,cb,pid,trace) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid),(trace)); } while (0)
  539. #define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0)
  540. #define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0)
  541. #define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0)
  542. #define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0)
  543. #define ev_embed_init(ev,cb,other) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0)
  544. #define ev_fork_init(ev,cb) do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0)
  545. #define ev_async_init(ev,cb) do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0)
  546. #define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */
  547. #define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */
  548. #define ev_cb(ev) (ev)->cb /* rw */
  549. #if EV_MINPRI == EV_MAXPRI
  550. # define ev_priority(ev) ((ev), EV_MINPRI)
  551. # define ev_set_priority(ev,pri) ((ev), (pri))
  552. #else
  553. # define ev_priority(ev) (+(((ev_watcher *)(void *)(ev))->priority))
  554. # define ev_set_priority(ev,pri) ( (ev_watcher *)(void *)(ev))->priority = (pri)
  555. #endif
  556. #define ev_periodic_at(ev) (+((ev_watcher_time *)(ev))->at)
  557. #ifndef ev_set_cb
  558. # define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_)
  559. #endif
  560. /* stopping (enabling, adding) a watcher does nothing if it is already running */
  561. /* stopping (disabling, deleting) a watcher does nothing unless its already running */
  562. #if EV_PROTOTYPES
  563. /* feeds an event into a watcher as if the event actually occured */
  564. /* accepts any ev_watcher type */
  565. void ev_feed_event (EV_P_ void *w, int revents);
  566. void ev_feed_fd_event (EV_P_ int fd, int revents);
  567. #if EV_SIGNAL_ENABLE
  568. void ev_feed_signal_event (EV_P_ int signum);
  569. #endif
  570. void ev_invoke (EV_P_ void *w, int revents);
  571. int ev_clear_pending (EV_P_ void *w);
  572. void ev_io_start (EV_P_ ev_io *w);
  573. void ev_io_stop (EV_P_ ev_io *w);
  574. void ev_timer_start (EV_P_ ev_timer *w);
  575. void ev_timer_stop (EV_P_ ev_timer *w);
  576. /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */
  577. void ev_timer_again (EV_P_ ev_timer *w);
  578. /* return remaining time */
  579. ev_tstamp ev_timer_remaining (EV_P_ ev_timer *w);
  580. #if EV_PERIODIC_ENABLE
  581. void ev_periodic_start (EV_P_ ev_periodic *w);
  582. void ev_periodic_stop (EV_P_ ev_periodic *w);
  583. void ev_periodic_again (EV_P_ ev_periodic *w);
  584. #endif
  585. /* only supported in the default loop */
  586. #if EV_SIGNAL_ENABLE
  587. void ev_signal_start (EV_P_ ev_signal *w);
  588. void ev_signal_stop (EV_P_ ev_signal *w);
  589. #endif
  590. /* only supported in the default loop */
  591. # if EV_CHILD_ENABLE
  592. void ev_child_start (EV_P_ ev_child *w);
  593. void ev_child_stop (EV_P_ ev_child *w);
  594. # endif
  595. # if EV_STAT_ENABLE
  596. void ev_stat_start (EV_P_ ev_stat *w);
  597. void ev_stat_stop (EV_P_ ev_stat *w);
  598. void ev_stat_stat (EV_P_ ev_stat *w);
  599. # endif
  600. # if EV_IDLE_ENABLE
  601. void ev_idle_start (EV_P_ ev_idle *w);
  602. void ev_idle_stop (EV_P_ ev_idle *w);
  603. # endif
  604. #if EV_PREPARE_ENABLE
  605. void ev_prepare_start (EV_P_ ev_prepare *w);
  606. void ev_prepare_stop (EV_P_ ev_prepare *w);
  607. #endif
  608. #if EV_CHECK_ENABLE
  609. void ev_check_start (EV_P_ ev_check *w);
  610. void ev_check_stop (EV_P_ ev_check *w);
  611. #endif
  612. # if EV_FORK_ENABLE
  613. void ev_fork_start (EV_P_ ev_fork *w);
  614. void ev_fork_stop (EV_P_ ev_fork *w);
  615. # endif
  616. # if EV_EMBED_ENABLE
  617. /* only supported when loop to be embedded is in fact embeddable */
  618. void ev_embed_start (EV_P_ ev_embed *w);
  619. void ev_embed_stop (EV_P_ ev_embed *w);
  620. void ev_embed_sweep (EV_P_ ev_embed *w);
  621. # endif
  622. # if EV_ASYNC_ENABLE
  623. void ev_async_start (EV_P_ ev_async *w);
  624. void ev_async_stop (EV_P_ ev_async *w);
  625. void ev_async_send (EV_P_ ev_async *w);
  626. # endif
  627. #endif
  628. #ifdef __cplusplus
  629. }
  630. #endif
  631. #endif