… | |
… | |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | */ |
28 | */ |
29 | |
29 | |
30 | #ifndef EV_H |
30 | #ifndef EV_H__ |
31 | #define EV_H |
31 | #define EV_H__ |
32 | |
32 | |
33 | #ifdef __cplusplus |
33 | #ifdef __cplusplus |
34 | extern "C" { |
34 | extern "C" { |
35 | #endif |
35 | #endif |
36 | |
36 | |
… | |
… | |
40 | #ifndef EV_MINPRI |
40 | #ifndef EV_MINPRI |
41 | # define EV_MINPRI -2 |
41 | # define EV_MINPRI -2 |
42 | #endif |
42 | #endif |
43 | #ifndef EV_MAXPRI |
43 | #ifndef EV_MAXPRI |
44 | # define EV_MAXPRI +2 |
44 | # define EV_MAXPRI +2 |
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45 | #endif |
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46 | |
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47 | #ifndef EV_MULTIPLICITY |
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48 | # define EV_MULTIPLICITY 1 |
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49 | #endif |
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50 | |
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51 | /* support multiple event loops? */ |
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52 | #if EV_MULTIPLICITY |
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53 | struct ev_loop; |
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54 | # define EV_P struct ev_loop *loop |
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55 | # define EV_P_ EV_P, |
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56 | # define EV_A loop |
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57 | # define EV_A_ EV_A, |
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58 | #else |
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59 | # define EV_P void |
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60 | # define EV_P_ |
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61 | # define EV_A |
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62 | # define EV_A_ |
45 | #endif |
63 | #endif |
46 | |
64 | |
47 | /* eventmask, revents, events... */ |
65 | /* eventmask, revents, events... */ |
48 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
66 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
49 | #define EV_NONE 0x00 |
67 | #define EV_NONE 0x00 |
… | |
… | |
78 | |
96 | |
79 | /* shared by all watchers */ |
97 | /* shared by all watchers */ |
80 | #define EV_WATCHER(type) \ |
98 | #define EV_WATCHER(type) \ |
81 | int active; /* private */ \ |
99 | int active; /* private */ \ |
82 | int pending; /* private */ \ |
100 | int pending; /* private */ \ |
83 | int priority; /* ro */ \ |
101 | int priority; /* private */ \ |
84 | EV_COMMON; /* rw */ \ |
102 | EV_COMMON; /* rw */ \ |
85 | void (*cb)(struct type *, int revents); /* rw */ /* gets invoked with an eventmask */ |
103 | void (*cb)(EV_P_ struct type *, int revents) /* private */ /* gets invoked with an eventmask */ |
86 | |
104 | |
87 | #define EV_WATCHER_LIST(type) \ |
105 | #define EV_WATCHER_LIST(type) \ |
88 | EV_WATCHER (type); \ |
106 | EV_WATCHER (type); \ |
89 | struct type *next /* private */ |
107 | struct ev_watcher_list *next /* private */ |
90 | |
108 | |
91 | #define EV_WATCHER_TIME(type) \ |
109 | #define EV_WATCHER_TIME(type) \ |
92 | EV_WATCHER (type); \ |
110 | EV_WATCHER (type); \ |
93 | ev_tstamp at /* private */ |
111 | ev_tstamp at /* private */ |
94 | |
112 | |
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121 | struct ev_periodic |
139 | struct ev_periodic |
122 | { |
140 | { |
123 | EV_WATCHER_TIME (ev_periodic); |
141 | EV_WATCHER_TIME (ev_periodic); |
124 | |
142 | |
125 | ev_tstamp interval; /* rw */ |
143 | ev_tstamp interval; /* rw */ |
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144 | ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */ |
126 | }; |
145 | }; |
127 | |
146 | |
128 | /* invoked when fd is either EV_READable or EV_WRITEable */ |
147 | /* invoked when fd is either EV_READable or EV_WRITEable */ |
129 | /* revent EV_READ, EV_WRITE */ |
148 | /* revent EV_READ, EV_WRITE */ |
130 | struct ev_io |
149 | struct ev_io |
… | |
… | |
166 | EV_WATCHER (ev_check); |
185 | EV_WATCHER (ev_check); |
167 | }; |
186 | }; |
168 | |
187 | |
169 | /* invoked when sigchld is received and waitpid indicates the givne pid */ |
188 | /* invoked when sigchld is received and waitpid indicates the givne pid */ |
170 | /* revent EV_CHILD */ |
189 | /* revent EV_CHILD */ |
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190 | /* does not support priorities */ |
171 | struct ev_child |
191 | struct ev_child |
172 | { |
192 | { |
173 | EV_WATCHER_LIST (ev_child); |
193 | EV_WATCHER_LIST (ev_child); |
174 | |
194 | |
175 | int pid; /* ro */ |
195 | int pid; /* ro */ |
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196 | int rpid; /* rw, holds the received pid */ |
176 | int status; /* rw, holds the exit status, use the macros from sys/wait.h */ |
197 | int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ |
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198 | }; |
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199 | |
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200 | /* the presence of this union forces similar struct layout */ |
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201 | union ev_any_watcher |
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202 | { |
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203 | struct ev_watcher w; |
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204 | struct ev_watcher_list wl; |
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205 | struct ev_io io; |
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206 | struct ev_timer timer; |
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207 | struct ev_periodic periodic; |
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208 | struct ev_signal signal; |
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209 | struct ev_idle idle; |
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210 | struct ev_child child; |
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211 | struct ev_prepare prepare; |
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212 | struct ev_check check; |
177 | }; |
213 | }; |
178 | |
214 | |
179 | #define EVMETHOD_AUTO 0 /* consults environment */ |
215 | #define EVMETHOD_AUTO 0 /* consults environment */ |
180 | #define EVMETHOD_SELECT 1 |
216 | #define EVMETHOD_SELECT 1 |
181 | #define EVMETHOD_POLL 2 |
217 | #define EVMETHOD_POLL 2 |
182 | #define EVMETHOD_EPOLL 4 |
218 | #define EVMETHOD_EPOLL 4 |
183 | #define EVMETHOD_KQUEUE 8 |
219 | #define EVMETHOD_KQUEUE 8 |
184 | #define EVMETHOD_DEVPOLL 16 /* NYI */ |
220 | #define EVMETHOD_DEVPOLL 16 /* NYI */ |
185 | #define EVMETHOD_PORT 32 /* NYI */ |
221 | #define EVMETHOD_PORT 32 /* NYI */ |
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222 | #define EVMETHOD_WIN32 64 /* NYI */ |
186 | #define EVMETHOD_ANY ~0 /* any method, do not consult env */ |
223 | #define EVMETHOD_ANY ~0 /* any method, do not consult env */ |
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224 | |
187 | #if EV_PROTOTYPES |
225 | #if EV_PROTOTYPES |
188 | extern int ev_method; |
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189 | int ev_init (int methods); /* returns ev_method */ |
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190 | int ev_version_major (void); |
226 | int ev_version_major (void); |
191 | int ev_version_minor (void); |
227 | int ev_version_minor (void); |
192 | |
228 | |
193 | /* these three calls are suitable for plugging into pthread_atfork */ |
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194 | void ev_fork_prepare (void); |
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195 | void ev_fork_parent (void); |
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196 | void ev_fork_child (void); |
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197 | |
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198 | extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */ |
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199 | ev_tstamp ev_time (void); |
229 | ev_tstamp ev_time (void); |
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230 | |
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231 | /* Sets the allocation function to use, works like realloc. |
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232 | * It is used to allocate and free memory. |
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233 | * If it returns zero when memory needs to be allocated, the library might abort |
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234 | * or take some potentially destructive action. |
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235 | * The default is your system realloc function. |
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236 | */ |
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237 | void ev_set_allocator (void *(*cb)(void *ptr, long size)); |
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238 | |
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239 | /* set the callback function to call on a |
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240 | * retryable syscall error |
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241 | * (such as failed select, poll, epoll_wait) |
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242 | */ |
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243 | void ev_set_syserr_cb (void (*cb)(const char *msg)); |
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244 | |
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245 | # if EV_MULTIPLICITY |
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246 | /* the default loop is the only one that handles signals and child watchers */ |
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247 | /* you can call this as often as you like */ |
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248 | struct ev_loop *ev_default_loop (int methods); /* returns default loop */ |
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249 | |
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250 | /* create and destroy alternative loops that don't handle signals */ |
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251 | struct ev_loop *ev_loop_new (int methods); |
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252 | void ev_loop_destroy (EV_P); |
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253 | void ev_loop_fork (EV_P); |
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254 | # else |
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255 | int ev_default_loop (int methods); /* returns true when successful */ |
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256 | # endif |
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257 | |
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258 | void ev_default_destroy (void); /* destroy the default loop */ |
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259 | /* this needs to be called after fork, to duplicate the default loop */ |
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260 | /* if you create alternative loops you have to call ev_loop_fork on them */ |
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261 | /* you can call it in either the parent or the child */ |
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262 | /* you can actually call it at any time, anywhere :) */ |
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263 | void ev_default_fork (void); |
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264 | |
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265 | int ev_method (EV_P); |
200 | #endif |
266 | #endif |
201 | |
267 | |
202 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
268 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
203 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
269 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
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270 | #define EVUNLOOP_ONCE 1 /* unloop once */ |
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271 | #define EVUNLOOP_ALL 2 /* unloop all loops */ |
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272 | |
204 | #if EV_PROTOTYPES |
273 | #if EV_PROTOTYPES |
205 | void ev_loop (int flags); |
274 | void ev_loop (EV_P_ int flags); |
206 | extern int ev_loop_done; /* set to 1 to break out of event loop, set to 2 to break out of all event loops */ |
275 | 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 */ |
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276 | |
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277 | ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */ |
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278 | |
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279 | /* |
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280 | * ref/unref can be used to add or remove a refcount on the mainloop. every watcher |
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281 | * keeps one reference. if you have a long-runing watcher you never unregister that |
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282 | * should not keep ev_loop from running, unref() after starting, and ref() before stopping. |
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283 | */ |
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284 | void ev_ref (EV_P); |
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285 | void ev_unref (EV_P); |
207 | |
286 | |
208 | /* convinience function, wait for a single event, without registering an event watcher */ |
287 | /* convinience function, wait for a single event, without registering an event watcher */ |
209 | /* if timeout is < 0, do wait indefinitely */ |
288 | /* if timeout is < 0, do wait indefinitely */ |
210 | void ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
289 | void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
211 | #endif |
290 | #endif |
212 | |
291 | |
213 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
292 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
214 | /* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ |
293 | /* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ |
215 | #define ev_watcher_init(ev,cb_) do { (ev)->active = (ev)->pending = (ev)->priority = 0; (ev)->cb = (cb_); } while (0) |
294 | #define ev_watcher_init(ev,cb_) do { \ |
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295 | ((struct ev_watcher *)(void *)(ev))->active = \ |
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296 | ((struct ev_watcher *)(void *)(ev))->pending = \ |
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297 | ((struct ev_watcher *)(void *)(ev))->priority = 0; \ |
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298 | (ev)->cb = (cb_); \ |
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299 | } while (0) |
216 | |
300 | |
217 | #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
301 | #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
218 | #define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
302 | #define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
219 | #define ev_periodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) |
303 | #define ev_periodic_set(ev,at_,ival_,res_) do { (ev)->at = (at_); (ev)->interval = (ival_); (ev)->reschedule_cb= (res_); } while (0) |
220 | #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
304 | #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
221 | #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ |
305 | #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ |
222 | #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ |
306 | #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ |
223 | #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ |
307 | #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ |
224 | #define ev_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) |
308 | #define ev_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) |
225 | |
309 | |
226 | #define ev_io_init(ev,cb,fd,events) do { ev_watcher_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) |
310 | #define ev_io_init(ev,cb,fd,events) do { ev_watcher_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) |
227 | #define ev_timer_init(ev,cb,after,repeat) do { ev_watcher_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) |
311 | #define ev_timer_init(ev,cb,after,repeat) do { ev_watcher_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) |
228 | #define ev_periodic_init(ev,cb,at,interval) do { ev_watcher_init ((ev), (cb)); ev_periodic_set ((ev),(at),(interval)); } while (0) |
312 | #define ev_periodic_init(ev,cb,at,ival,res) do { ev_watcher_init ((ev), (cb)); ev_periodic_set ((ev),(at),(ival),(res)); } while (0) |
229 | #define ev_signal_init(ev,cb,signum) do { ev_watcher_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) |
313 | #define ev_signal_init(ev,cb,signum) do { ev_watcher_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) |
230 | #define ev_idle_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) |
314 | #define ev_idle_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) |
231 | #define ev_prepare_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
315 | #define ev_prepare_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
232 | #define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
316 | #define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
233 | #define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0) |
317 | #define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0) |
234 | |
318 | |
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319 | #define ev_is_pending(ev) (0 + ((struct ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */ |
235 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
320 | #define ev_is_active(ev) (0 + ((struct ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */ |
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321 | |
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322 | #define ev_priority(ev) ((struct ev_watcher *)(void *)(ev))->priority /* rw */ |
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323 | #define ev_cb(ev) (ev)->cb /* rw */ |
236 | #define ev_set_priority(ev,pri) (ev)->priority = pri |
324 | #define ev_set_priority(ev,pri) ev_priority (ev) = (pri) |
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325 | #define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_) |
237 | |
326 | |
238 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
327 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
239 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
328 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
240 | #if EV_PROTOTYPES |
329 | #if EV_PROTOTYPES |
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330 | |
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331 | /* feeds an event into a watcher as if the event actually occured */ |
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332 | /* accepts any ev_watcher type */ |
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333 | void ev_feed_event (EV_P_ void *w, int revents); |
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334 | void ev_feed_fd_event (EV_P_ int fd, int revents); |
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335 | void ev_feed_signal_event (EV_P_ int signum); |
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336 | |
241 | void ev_io_start (struct ev_io *w); |
337 | void ev_io_start (EV_P_ struct ev_io *w); |
242 | void ev_io_stop (struct ev_io *w); |
338 | void ev_io_stop (EV_P_ struct ev_io *w); |
243 | |
339 | |
244 | void ev_timer_start (struct ev_timer *w); |
340 | void ev_timer_start (EV_P_ struct ev_timer *w); |
245 | void ev_timer_stop (struct ev_timer *w); |
341 | void ev_timer_stop (EV_P_ struct ev_timer *w); |
246 | void ev_timer_again (struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ |
342 | /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ |
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343 | void ev_timer_again (EV_P_ struct ev_timer *w); |
247 | |
344 | |
248 | void ev_periodic_start (struct ev_periodic *w); |
345 | void ev_periodic_start (EV_P_ struct ev_periodic *w); |
249 | void ev_periodic_stop (struct ev_periodic *w); |
346 | void ev_periodic_stop (EV_P_ struct ev_periodic *w); |
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347 | void ev_periodic_again (EV_P_ struct ev_periodic *w); |
250 | |
348 | |
251 | void ev_signal_start (struct ev_signal *w); |
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252 | void ev_signal_stop (struct ev_signal *w); |
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253 | |
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254 | void ev_idle_start (struct ev_idle *w); |
349 | void ev_idle_start (EV_P_ struct ev_idle *w); |
255 | void ev_idle_stop (struct ev_idle *w); |
350 | void ev_idle_stop (EV_P_ struct ev_idle *w); |
256 | |
351 | |
257 | void ev_prepare_start (struct ev_prepare *w); |
352 | void ev_prepare_start (EV_P_ struct ev_prepare *w); |
258 | void ev_prepare_stop (struct ev_prepare *w); |
353 | void ev_prepare_stop (EV_P_ struct ev_prepare *w); |
259 | |
354 | |
260 | void ev_check_start (struct ev_check *w); |
355 | void ev_check_start (EV_P_ struct ev_check *w); |
261 | void ev_check_stop (struct ev_check *w); |
356 | void ev_check_stop (EV_P_ struct ev_check *w); |
262 | |
357 | |
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358 | /* only supported in the default loop */ |
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359 | void ev_signal_start (EV_P_ struct ev_signal *w); |
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360 | void ev_signal_stop (EV_P_ struct ev_signal *w); |
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361 | |
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362 | /* only supported in the default loop */ |
263 | void ev_child_start (struct ev_child *w); |
363 | void ev_child_start (EV_P_ struct ev_child *w); |
264 | void ev_child_stop (struct ev_child *w); |
364 | void ev_child_stop (EV_P_ struct ev_child *w); |
265 | #endif |
365 | #endif |
266 | |
366 | |
267 | #ifdef __cplusplus |
367 | #ifdef __cplusplus |
268 | } |
368 | } |
269 | #endif |
369 | #endif |