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. /* pre-4.0 compatibility */
  46. #ifndef EV_COMPAT3
  47. # define EV_COMPAT3 1
  48. #endif
  49. #ifndef EV_FEATURES
  50. # define EV_FEATURES 0x7f
  51. #endif
  52. #define EV_FEATURE_CODE ((EV_FEATURES) & 1)
  53. #define EV_FEATURE_DATA ((EV_FEATURES) & 2)
  54. #define EV_FEATURE_CONFIG ((EV_FEATURES) & 4)
  55. #define EV_FEATURE_API ((EV_FEATURES) & 8)
  56. #define EV_FEATURE_WATCHERS ((EV_FEATURES) & 16)
  57. #define EV_FEATURE_BACKENDS ((EV_FEATURES) & 32)
  58. #define EV_FEATURE_OS ((EV_FEATURES) & 64)
  59. /* these priorities are inclusive, higher priorities will be invoked earlier */
  60. #ifndef EV_MINPRI
  61. # define EV_MINPRI (EV_FEATURE_CONFIG ? -2 : 0)
  62. #endif
  63. #ifndef EV_MAXPRI
  64. # define EV_MAXPRI (EV_FEATURE_CONFIG ? +2 : 0)
  65. #endif
  66. #ifndef EV_MULTIPLICITY
  67. # define EV_MULTIPLICITY EV_FEATURE_CONFIG
  68. #endif
  69. #ifndef EV_PERIODIC_ENABLE
  70. # define EV_PERIODIC_ENABLE EV_FEATURE_WATCHERS
  71. #endif
  72. #ifndef EV_STAT_ENABLE
  73. # define EV_STAT_ENABLE EV_FEATURE_WATCHERS
  74. #endif
  75. #ifndef EV_PREPARE_ENABLE
  76. # define EV_PREPARE_ENABLE EV_FEATURE_WATCHERS
  77. #endif
  78. #ifndef EV_CHECK_ENABLE
  79. # define EV_CHECK_ENABLE EV_FEATURE_WATCHERS
  80. #endif
  81. #ifndef EV_IDLE_ENABLE
  82. # define EV_IDLE_ENABLE EV_FEATURE_WATCHERS
  83. #endif
  84. #ifndef EV_FORK_ENABLE
  85. # define EV_FORK_ENABLE EV_FEATURE_WATCHERS
  86. #endif
  87. #ifndef EV_SIGNAL_ENABLE
  88. # define EV_SIGNAL_ENABLE EV_FEATURE_WATCHERS
  89. #endif
  90. #ifndef EV_CHILD_ENABLE
  91. # ifdef _WIN32
  92. # define EV_CHILD_ENABLE 0
  93. # else
  94. # define EV_CHILD_ENABLE EV_FEATURE_WATCHERS
  95. #endif
  96. #endif
  97. #ifndef EV_ASYNC_ENABLE
  98. # define EV_ASYNC_ENABLE EV_FEATURE_WATCHERS
  99. #endif
  100. #ifndef EV_EMBED_ENABLE
  101. # define EV_EMBED_ENABLE EV_FEATURE_WATCHERS
  102. #endif
  103. #ifndef EV_WALK_ENABLE
  104. # define EV_WALK_ENABLE 0 /* not yet */
  105. #endif
  106. /*****************************************************************************/
  107. #if EV_CHILD_ENABLE && !EV_SIGNAL_ENABLE
  108. # undef EV_SIGNAL_ENABLE
  109. # define EV_SIGNAL_ENABLE 1
  110. #endif
  111. /*****************************************************************************/
  112. typedef double ev_tstamp;
  113. #ifndef EV_ATOMIC_T
  114. # include <signal.h>
  115. # define EV_ATOMIC_T sig_atomic_t volatile
  116. #endif
  117. #if EV_STAT_ENABLE
  118. # ifdef _WIN32
  119. # include <time.h>
  120. # include <sys/types.h>
  121. # endif
  122. # include <sys/stat.h>
  123. #endif
  124. /* support multiple event loops? */
  125. #if EV_MULTIPLICITY
  126. struct ev_loop;
  127. # define EV_P struct ev_loop *loop
  128. # define EV_P_ EV_P,
  129. # define EV_A loop
  130. # define EV_A_ EV_A,
  131. # define EV_DEFAULT_UC ev_default_loop_uc ()
  132. # define EV_DEFAULT_UC_ EV_DEFAULT_UC,
  133. # define EV_DEFAULT ev_default_loop (0)
  134. # define EV_DEFAULT_ EV_DEFAULT,
  135. #else
  136. # define EV_P void
  137. # define EV_P_
  138. # define EV_A
  139. # define EV_A_
  140. # define EV_DEFAULT
  141. # define EV_DEFAULT_
  142. # define EV_DEFAULT_UC
  143. # define EV_DEFAULT_UC_
  144. # undef EV_EMBED_ENABLE
  145. #endif
  146. #if __STDC_VERSION__ >= 199901L || __GNUC__ >= 3
  147. # define EV_INLINE static inline
  148. #else
  149. # define EV_INLINE static
  150. #endif
  151. #ifndef EV_PROTOTYPES
  152. # define EV_PROTOTYPES 1
  153. #endif
  154. /*****************************************************************************/
  155. #define EV_VERSION_MAJOR 4
  156. #define EV_VERSION_MINOR 0
  157. /* eventmask, revents, events... */
  158. enum {
  159. EV_UNDEF = -1, /* guaranteed to be invalid */
  160. EV_NONE = 0x00, /* no events */
  161. EV_READ = 0x01, /* ev_io detected read will not block */
  162. EV_WRITE = 0x02, /* ev_io detected write will not block */
  163. EV__IOFDSET = 0x80, /* internal use only */
  164. EV_IO = EV_READ, /* alias for type-detection */
  165. EV_TIMER = 0x00000100, /* timer timed out */
  166. EV_TIMEOUT = EV_TIMER, /* pre 4.0 API compatibility */
  167. EV_PERIODIC = 0x00000200, /* periodic timer timed out */
  168. EV_SIGNAL = 0x00000400, /* signal was received */
  169. EV_CHILD = 0x00000800, /* child/pid had status change */
  170. EV_STAT = 0x00001000, /* stat data changed */
  171. EV_IDLE = 0x00002000, /* event loop is idling */
  172. EV_PREPARE = 0x00004000, /* event loop about to poll */
  173. EV_CHECK = 0x00008000, /* event loop finished poll */
  174. EV_EMBED = 0x00010000, /* embedded event loop needs sweep */
  175. EV_FORK = 0x00020000, /* event loop resumed in child */
  176. EV_ASYNC = 0x00040000, /* async intra-loop signal */
  177. EV_CUSTOM = 0x01000000, /* for use by user code */
  178. EV_ERROR = 0x80000000 /* sent when an error occurs */
  179. };
  180. /* can be used to add custom fields to all watchers, while losing binary compatibility */
  181. #ifndef EV_COMMON
  182. # define EV_COMMON void *data;
  183. #endif
  184. #ifndef EV_CB_DECLARE
  185. # define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents);
  186. #endif
  187. #ifndef EV_CB_INVOKE
  188. # define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents))
  189. #endif
  190. /* not official, do not use */
  191. #define EV_CB(type,name) void name (EV_P_ struct ev_ ## type *w, int revents)
  192. /*
  193. * struct member types:
  194. * private: you may look at them, but not change them,
  195. * and they might not mean anything to you.
  196. * ro: can be read anytime, but only changed when the watcher isn't active.
  197. * rw: can be read and modified anytime, even when the watcher is active.
  198. *
  199. * some internal details that might be helpful for debugging:
  200. *
  201. * active is either 0, which means the watcher is not active,
  202. * or the array index of the watcher (periodics, timers)
  203. * or the array index + 1 (most other watchers)
  204. * or simply 1 for watchers that aren't in some array.
  205. * pending is either 0, in which case the watcher isn't,
  206. * or the array index + 1 in the pendings array.
  207. */
  208. #if EV_MINPRI == EV_MAXPRI
  209. # define EV_DECL_PRIORITY
  210. #elif !defined (EV_DECL_PRIORITY)
  211. # define EV_DECL_PRIORITY int priority;
  212. #endif
  213. /* shared by all watchers */
  214. #define EV_WATCHER(type) \
  215. int active; /* private */ \
  216. int pending; /* private */ \
  217. EV_DECL_PRIORITY /* private */ \
  218. EV_COMMON /* rw */ \
  219. EV_CB_DECLARE (type) /* private */
  220. #define EV_WATCHER_LIST(type) \
  221. EV_WATCHER (type) \
  222. struct ev_watcher_list *next; /* private */
  223. #define EV_WATCHER_TIME(type) \
  224. EV_WATCHER (type) \
  225. ev_tstamp at; /* private */
  226. /* base class, nothing to see here unless you subclass */
  227. typedef struct ev_watcher
  228. {
  229. EV_WATCHER (ev_watcher)
  230. } ev_watcher;
  231. /* base class, nothing to see here unless you subclass */
  232. typedef struct ev_watcher_list
  233. {
  234. EV_WATCHER_LIST (ev_watcher_list)
  235. } ev_watcher_list;
  236. /* base class, nothing to see here unless you subclass */
  237. typedef struct ev_watcher_time
  238. {
  239. EV_WATCHER_TIME (ev_watcher_time)
  240. } ev_watcher_time;
  241. /* invoked when fd is either EV_READable or EV_WRITEable */
  242. /* revent EV_READ, EV_WRITE */
  243. typedef struct ev_io
  244. {
  245. EV_WATCHER_LIST (ev_io)
  246. int fd; /* ro */
  247. int events; /* ro */
  248. } ev_io;
  249. /* invoked after a specific time, repeatable (based on monotonic clock) */
  250. /* revent EV_TIMEOUT */
  251. typedef struct ev_timer
  252. {
  253. EV_WATCHER_TIME (ev_timer)
  254. ev_tstamp repeat; /* rw */
  255. } ev_timer;
  256. /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */
  257. /* revent EV_PERIODIC */
  258. typedef struct ev_periodic
  259. {
  260. EV_WATCHER_TIME (ev_periodic)
  261. ev_tstamp offset; /* rw */
  262. ev_tstamp interval; /* rw */
  263. ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */
  264. } ev_periodic;
  265. /* invoked when the given signal has been received */
  266. /* revent EV_SIGNAL */
  267. typedef struct ev_signal
  268. {
  269. EV_WATCHER_LIST (ev_signal)
  270. int signum; /* ro */
  271. } ev_signal;
  272. /* invoked when sigchld is received and waitpid indicates the given pid */
  273. /* revent EV_CHILD */
  274. /* does not support priorities */
  275. typedef struct ev_child
  276. {
  277. EV_WATCHER_LIST (ev_child)
  278. int flags; /* private */
  279. int pid; /* ro */
  280. int rpid; /* rw, holds the received pid */
  281. int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */
  282. } ev_child;
  283. #if EV_STAT_ENABLE
  284. /* st_nlink = 0 means missing file or other error */
  285. # ifdef _WIN32
  286. typedef struct _stati64 ev_statdata;
  287. # else
  288. typedef struct stat ev_statdata;
  289. # endif
  290. /* invoked each time the stat data changes for a given path */
  291. /* revent EV_STAT */
  292. typedef struct ev_stat
  293. {
  294. EV_WATCHER_LIST (ev_stat)
  295. ev_timer timer; /* private */
  296. ev_tstamp interval; /* ro */
  297. const char *path; /* ro */
  298. ev_statdata prev; /* ro */
  299. ev_statdata attr; /* ro */
  300. int wd; /* wd for inotify, fd for kqueue */
  301. } ev_stat;
  302. #endif
  303. #if EV_IDLE_ENABLE
  304. /* invoked when the nothing else needs to be done, keeps the process from blocking */
  305. /* revent EV_IDLE */
  306. typedef struct ev_idle
  307. {
  308. EV_WATCHER (ev_idle)
  309. } ev_idle;
  310. #endif
  311. /* invoked for each run of the mainloop, just before the blocking call */
  312. /* you can still change events in any way you like */
  313. /* revent EV_PREPARE */
  314. typedef struct ev_prepare
  315. {
  316. EV_WATCHER (ev_prepare)
  317. } ev_prepare;
  318. /* invoked for each run of the mainloop, just after the blocking call */
  319. /* revent EV_CHECK */
  320. typedef struct ev_check
  321. {
  322. EV_WATCHER (ev_check)
  323. } ev_check;
  324. #if EV_FORK_ENABLE
  325. /* the callback gets invoked before check in the child process when a fork was detected */
  326. typedef struct ev_fork
  327. {
  328. EV_WATCHER (ev_fork)
  329. } ev_fork;
  330. #endif
  331. #if EV_EMBED_ENABLE
  332. /* used to embed an event loop inside another */
  333. /* the callback gets invoked when the event loop has handled events, and can be 0 */
  334. typedef struct ev_embed
  335. {
  336. EV_WATCHER (ev_embed)
  337. struct ev_loop *other; /* ro */
  338. ev_io io; /* private */
  339. ev_prepare prepare; /* private */
  340. ev_check check; /* unused */
  341. ev_timer timer; /* unused */
  342. ev_periodic periodic; /* unused */
  343. ev_idle idle; /* unused */
  344. ev_fork fork; /* private */
  345. } ev_embed;
  346. #endif
  347. #if EV_ASYNC_ENABLE
  348. /* invoked when somebody calls ev_async_send on the watcher */
  349. /* revent EV_ASYNC */
  350. typedef struct ev_async
  351. {
  352. EV_WATCHER (ev_async)
  353. EV_ATOMIC_T sent; /* private */
  354. } ev_async;
  355. # define ev_async_pending(w) (+(w)->sent)
  356. #endif
  357. /* the presence of this union forces similar struct layout */
  358. union ev_any_watcher
  359. {
  360. struct ev_watcher w;
  361. struct ev_watcher_list wl;
  362. struct ev_io io;
  363. struct ev_timer timer;
  364. struct ev_periodic periodic;
  365. struct ev_signal signal;
  366. struct ev_child child;
  367. #if EV_STAT_ENABLE
  368. struct ev_stat stat;
  369. #endif
  370. #if EV_IDLE_ENABLE
  371. struct ev_idle idle;
  372. #endif
  373. struct ev_prepare prepare;
  374. struct ev_check check;
  375. #if EV_FORK_ENABLE
  376. struct ev_fork fork;
  377. #endif
  378. #if EV_EMBED_ENABLE
  379. struct ev_embed embed;
  380. #endif
  381. #if EV_ASYNC_ENABLE
  382. struct ev_async async;
  383. #endif
  384. };
  385. /* flag bits for ev_default_loop and ev_loop_new */
  386. enum {
  387. /* the default */
  388. EVFLAG_AUTO = 0x00000000U, /* not quite a mask */
  389. /* flag bits */
  390. EVFLAG_NOENV = 0x01000000U, /* do NOT consult environment */
  391. EVFLAG_FORKCHECK = 0x02000000U, /* check for a fork in each iteration */
  392. /* debugging/feature disable */
  393. EVFLAG_NOINOTIFY = 0x00100000U, /* do not attempt to use inotify */
  394. #if EV_COMPAT3
  395. EVFLAG_NOSIGFD = 0, /* compatibility to pre-3.9 */
  396. #endif
  397. EVFLAG_SIGNALFD = 0x00200000U /* attempt to use signalfd */
  398. };
  399. /* method bits to be ored together */
  400. enum {
  401. EVBACKEND_SELECT = 0x00000001U, /* about anywhere */
  402. EVBACKEND_POLL = 0x00000002U, /* !win */
  403. EVBACKEND_EPOLL = 0x00000004U, /* linux */
  404. EVBACKEND_KQUEUE = 0x00000008U, /* bsd */
  405. EVBACKEND_DEVPOLL = 0x00000010U, /* solaris 8 */ /* NYI */
  406. EVBACKEND_PORT = 0x00000020U, /* solaris 10 */
  407. EVBACKEND_ALL = 0x0000003FU
  408. };
  409. #if EV_PROTOTYPES
  410. int ev_version_major (void);
  411. int ev_version_minor (void);
  412. unsigned int ev_supported_backends (void);
  413. unsigned int ev_recommended_backends (void);
  414. unsigned int ev_embeddable_backends (void);
  415. ev_tstamp ev_time (void);
  416. void ev_sleep (ev_tstamp delay); /* sleep for a while */
  417. /* Sets the allocation function to use, works like realloc.
  418. * It is used to allocate and free memory.
  419. * If it returns zero when memory needs to be allocated, the library might abort
  420. * or take some potentially destructive action.
  421. * The default is your system realloc function.
  422. */
  423. void ev_set_allocator (void *(*cb)(void *ptr, long size));
  424. /* set the callback function to call on a
  425. * retryable syscall error
  426. * (such as failed select, poll, epoll_wait)
  427. */
  428. void ev_set_syserr_cb (void (*cb)(const char *msg));
  429. #if EV_MULTIPLICITY
  430. EV_INLINE struct ev_loop *
  431. ev_default_loop_uc (void)
  432. {
  433. extern struct ev_loop *ev_default_loop_ptr;
  434. return ev_default_loop_ptr;
  435. }
  436. /* the default loop is the only one that handles signals and child watchers */
  437. /* you can call this as often as you like */
  438. EV_INLINE struct ev_loop *
  439. ev_default_loop (unsigned int flags)
  440. {
  441. struct ev_loop *loop = ev_default_loop_uc ();
  442. if (!loop)
  443. {
  444. extern struct ev_loop *ev_default_loop_init (unsigned int flags);
  445. loop = ev_default_loop_init (flags);
  446. }
  447. return loop;
  448. }
  449. /* create and destroy alternative loops that don't handle signals */
  450. struct ev_loop *ev_loop_new (unsigned int flags);
  451. void ev_loop_destroy (EV_P);
  452. void ev_loop_fork (EV_P);
  453. ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */
  454. #else
  455. int ev_default_loop (unsigned int flags); /* returns true when successful */
  456. EV_INLINE ev_tstamp
  457. ev_now (void)
  458. {
  459. extern ev_tstamp ev_rt_now;
  460. return ev_rt_now;
  461. }
  462. #endif /* multiplicity */
  463. EV_INLINE int
  464. ev_is_default_loop (EV_P)
  465. {
  466. #if EV_MULTIPLICITY
  467. extern struct ev_loop *ev_default_loop_ptr;
  468. return !!(EV_A == ev_default_loop_ptr);
  469. #else
  470. return 1;
  471. #endif
  472. }
  473. void ev_default_destroy (void); /* destroy the default loop */
  474. /* this needs to be called after fork, to duplicate the default loop */
  475. /* if you create alternative loops you have to call ev_loop_fork on them */
  476. /* you can call it in either the parent or the child */
  477. /* you can actually call it at any time, anywhere :) */
  478. void ev_default_fork (void);
  479. unsigned int ev_backend (EV_P); /* backend in use by loop */
  480. void ev_now_update (EV_P); /* update event loop time */
  481. #if EV_WALK_ENABLE
  482. /* walk (almost) all watchers in the loop of a given type, invoking the */
  483. /* callback on every such watcher. The callback might stop the watcher, */
  484. /* but do nothing else with the loop */
  485. void ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w));
  486. #endif
  487. #endif /* prototypes */
  488. /* ev_run flags values */
  489. enum {
  490. EVRUN_NOWAIT = 1, /* do not block/wait */
  491. EVRUN_ONCE = 2 /* block *once* only */
  492. };
  493. /* ev_break how values */
  494. enum {
  495. EVBREAK_CANCEL = 0, /* undo unloop */
  496. EVBREAK_ONE = 1, /* unloop once */
  497. EVBREAK_ALL = 2 /* unloop all loops */
  498. };
  499. #if EV_PROTOTYPES
  500. void ev_run (EV_P_ int flags);
  501. void ev_break (EV_P_ int how); /* set to 1 to break out of event loop, set to 2 to break out of all event loops */
  502. /*
  503. * ref/unref can be used to add or remove a refcount on the mainloop. every watcher
  504. * keeps one reference. if you have a long-running watcher you never unregister that
  505. * should not keep ev_loop from running, unref() after starting, and ref() before stopping.
  506. */
  507. void ev_ref (EV_P);
  508. void ev_unref (EV_P);
  509. /*
  510. * convenience function, wait for a single event, without registering an event watcher
  511. * if timeout is < 0, do wait indefinitely
  512. */
  513. void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg);
  514. # if EV_FEATURE_API
  515. unsigned int ev_iteration (EV_P); /* number of loop iterations */
  516. unsigned int ev_depth (EV_P); /* #ev_loop enters - #ev_loop leaves */
  517. void ev_verify (EV_P); /* abort if loop data corrupted */
  518. void ev_set_io_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */
  519. void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */
  520. /* advanced stuff for threading etc. support, see docs */
  521. void ev_set_userdata (EV_P_ void *data);
  522. void *ev_userdata (EV_P);
  523. void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P));
  524. void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P));
  525. unsigned int ev_pending_count (EV_P); /* number of pending events, if any */
  526. void ev_invoke_pending (EV_P); /* invoke all pending watchers */
  527. /*
  528. * stop/start the timer handling.
  529. */
  530. void ev_suspend (EV_P);
  531. void ev_resume (EV_P);
  532. #endif
  533. #endif
  534. /* these may evaluate ev multiple times, and the other arguments at most once */
  535. /* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */
  536. #define ev_init(ev,cb_) do { \
  537. ((ev_watcher *)(void *)(ev))->active = \
  538. ((ev_watcher *)(void *)(ev))->pending = 0; \
  539. ev_set_priority ((ev), 0); \
  540. ev_set_cb ((ev), cb_); \
  541. } while (0)
  542. #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_) | EV__IOFDSET; } while (0)
  543. #define ev_timer_set(ev,after_,repeat_) do { ((ev_watcher_time *)(ev))->at = (after_); (ev)->repeat = (repeat_); } while (0)
  544. #define ev_periodic_set(ev,ofs_,ival_,rcb_) do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb = (rcb_); } while (0)
  545. #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0)
  546. #define ev_child_set(ev,pid_,trace_) do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0)
  547. #define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0)
  548. #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */
  549. #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */
  550. #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */
  551. #define ev_embed_set(ev,other_) do { (ev)->other = (other_); } while (0)
  552. #define ev_fork_set(ev) /* nop, yes, this is a serious in-joke */
  553. #define ev_async_set(ev) /* nop, yes, this is a serious in-joke */
  554. #define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0)
  555. #define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0)
  556. #define ev_periodic_init(ev,cb,ofs,ival,rcb) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(ofs),(ival),(rcb)); } while (0)
  557. #define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0)
  558. #define ev_child_init(ev,cb,pid,trace) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid),(trace)); } while (0)
  559. #define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0)
  560. #define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0)
  561. #define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0)
  562. #define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0)
  563. #define ev_embed_init(ev,cb,other) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0)
  564. #define ev_fork_init(ev,cb) do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0)
  565. #define ev_async_init(ev,cb) do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0)
  566. #define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */
  567. #define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */
  568. #define ev_cb(ev) (ev)->cb /* rw */
  569. #if EV_MINPRI == EV_MAXPRI
  570. # define ev_priority(ev) ((ev), EV_MINPRI)
  571. # define ev_set_priority(ev,pri) ((ev), (pri))
  572. #else
  573. # define ev_priority(ev) (+(((ev_watcher *)(void *)(ev))->priority))
  574. # define ev_set_priority(ev,pri) ( (ev_watcher *)(void *)(ev))->priority = (pri)
  575. #endif
  576. #define ev_periodic_at(ev) (+((ev_watcher_time *)(ev))->at)
  577. #ifndef ev_set_cb
  578. # define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_)
  579. #endif
  580. /* stopping (enabling, adding) a watcher does nothing if it is already running */
  581. /* stopping (disabling, deleting) a watcher does nothing unless its already running */
  582. #if EV_PROTOTYPES
  583. /* feeds an event into a watcher as if the event actually occured */
  584. /* accepts any ev_watcher type */
  585. void ev_feed_event (EV_P_ void *w, int revents);
  586. void ev_feed_fd_event (EV_P_ int fd, int revents);
  587. #if EV_SIGNAL_ENABLE
  588. void ev_feed_signal_event (EV_P_ int signum);
  589. #endif
  590. void ev_invoke (EV_P_ void *w, int revents);
  591. int ev_clear_pending (EV_P_ void *w);
  592. void ev_io_start (EV_P_ ev_io *w);
  593. void ev_io_stop (EV_P_ ev_io *w);
  594. void ev_timer_start (EV_P_ ev_timer *w);
  595. void ev_timer_stop (EV_P_ ev_timer *w);
  596. /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */
  597. void ev_timer_again (EV_P_ ev_timer *w);
  598. /* return remaining time */
  599. ev_tstamp ev_timer_remaining (EV_P_ ev_timer *w);
  600. #if EV_PERIODIC_ENABLE
  601. void ev_periodic_start (EV_P_ ev_periodic *w);
  602. void ev_periodic_stop (EV_P_ ev_periodic *w);
  603. void ev_periodic_again (EV_P_ ev_periodic *w);
  604. #endif
  605. /* only supported in the default loop */
  606. #if EV_SIGNAL_ENABLE
  607. void ev_signal_start (EV_P_ ev_signal *w);
  608. void ev_signal_stop (EV_P_ ev_signal *w);
  609. #endif
  610. /* only supported in the default loop */
  611. # if EV_CHILD_ENABLE
  612. void ev_child_start (EV_P_ ev_child *w);
  613. void ev_child_stop (EV_P_ ev_child *w);
  614. # endif
  615. # if EV_STAT_ENABLE
  616. void ev_stat_start (EV_P_ ev_stat *w);
  617. void ev_stat_stop (EV_P_ ev_stat *w);
  618. void ev_stat_stat (EV_P_ ev_stat *w);
  619. # endif
  620. # if EV_IDLE_ENABLE
  621. void ev_idle_start (EV_P_ ev_idle *w);
  622. void ev_idle_stop (EV_P_ ev_idle *w);
  623. # endif
  624. #if EV_PREPARE_ENABLE
  625. void ev_prepare_start (EV_P_ ev_prepare *w);
  626. void ev_prepare_stop (EV_P_ ev_prepare *w);
  627. #endif
  628. #if EV_CHECK_ENABLE
  629. void ev_check_start (EV_P_ ev_check *w);
  630. void ev_check_stop (EV_P_ ev_check *w);
  631. #endif
  632. # if EV_FORK_ENABLE
  633. void ev_fork_start (EV_P_ ev_fork *w);
  634. void ev_fork_stop (EV_P_ ev_fork *w);
  635. # endif
  636. # if EV_EMBED_ENABLE
  637. /* only supported when loop to be embedded is in fact embeddable */
  638. void ev_embed_start (EV_P_ ev_embed *w);
  639. void ev_embed_stop (EV_P_ ev_embed *w);
  640. void ev_embed_sweep (EV_P_ ev_embed *w);
  641. # endif
  642. # if EV_ASYNC_ENABLE
  643. void ev_async_start (EV_P_ ev_async *w);
  644. void ev_async_stop (EV_P_ ev_async *w);
  645. void ev_async_send (EV_P_ ev_async *w);
  646. # endif
  647. #if EV_COMPAT3
  648. #define EVLOOP_NONBLOCK EVRUN_NOWAIT
  649. #define EVLOOP_ONESHOT EVRUN_ONCE
  650. #define EVUNLOOP_CANCEL EVBREAK_CANCEL
  651. #define EVUNLOOP_ONE EVBREAK_ONE
  652. #define EVUNLOOP_ALL EVBREAK_ALL
  653. #if EV_PROTOTYPES
  654. EV_INLINE void ev_loop (EV_P_ int flags) { ev_run (EV_A_ flags); }
  655. EV_INLINE void ev_unloop (EV_P_ int how ) { ev_break (EV_A_ how ); }
  656. #if EV_FEATURE_API
  657. EV_INLINE void ev_loop_count (EV_P) { ev_iteration (EV_A); }
  658. EV_INLINE void ev_loop_depth (EV_P) { ev_depth (EV_A); }
  659. EV_INLINE void ev_loop_verify (EV_P) { ev_verify (EV_A); }
  660. #endif
  661. #endif
  662. #else
  663. typedef struct ev_loop ev_loop;
  664. #endif
  665. #endif
  666. #ifdef __cplusplus
  667. }
  668. #endif
  669. #endif