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1 | /* |
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2 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions are |
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7 | * met: |
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8 | * |
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9 | * * Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * * Redistributions in binary form must reproduce the above |
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13 | * copyright notice, this list of conditions and the following |
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14 | * disclaimer in the documentation and/or other materials provided |
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15 | * with the distribution. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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18 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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19 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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20 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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21 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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22 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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23 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | */ |
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29 | |
1 | #include <math.h> |
30 | #include <math.h> |
2 | #include <stdlib.h> |
31 | #include <stdlib.h> |
3 | #include <unistd.h> |
32 | #include <unistd.h> |
4 | #include <fcntl.h> |
33 | #include <fcntl.h> |
5 | #include <signal.h> |
34 | #include <signal.h> |
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35 | #include <stddef.h> |
6 | |
36 | |
7 | #include <stdio.h> |
37 | #include <stdio.h> |
8 | |
38 | |
9 | #include <assert.h> |
39 | #include <assert.h> |
10 | #include <errno.h> |
40 | #include <errno.h> |
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41 | #include <sys/types.h> |
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42 | #include <sys/wait.h> |
11 | #include <sys/time.h> |
43 | #include <sys/time.h> |
12 | #include <time.h> |
44 | #include <time.h> |
13 | |
45 | |
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46 | #ifndef HAVE_MONOTONIC |
14 | #ifdef CLOCK_MONOTONIC |
47 | # ifdef CLOCK_MONOTONIC |
15 | # define HAVE_MONOTONIC 1 |
48 | # define HAVE_MONOTONIC 1 |
16 | #endif |
49 | # endif |
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50 | #endif |
17 | |
51 | |
18 | #define HAVE_REALTIME 1 |
52 | #ifndef HAVE_SELECT |
19 | #define HAVE_EPOLL 1 |
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20 | #define HAVE_SELECT 1 |
53 | # define HAVE_SELECT 1 |
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54 | #endif |
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55 | |
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56 | #ifndef HAVE_EPOLL |
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57 | # define HAVE_EPOLL 0 |
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58 | #endif |
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59 | |
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60 | #ifndef HAVE_REALTIME |
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61 | # define HAVE_REALTIME 1 /* posix requirement, but might be slower */ |
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62 | #endif |
21 | |
63 | |
22 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
64 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
23 | #define MAX_BLOCKTIME 60. |
65 | #define MAX_BLOCKTIME 60. |
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66 | #define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ |
24 | |
67 | |
25 | #include "ev.h" |
68 | #include "ev.h" |
26 | |
69 | |
27 | struct ev_watcher { |
70 | typedef struct ev_watcher *W; |
28 | EV_WATCHER (ev_watcher); |
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29 | }; |
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30 | |
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31 | struct ev_watcher_list { |
71 | typedef struct ev_watcher_list *WL; |
32 | EV_WATCHER_LIST (ev_watcher_list); |
72 | typedef struct ev_watcher_time *WT; |
33 | }; |
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34 | |
73 | |
35 | static ev_tstamp now, diff; /* monotonic clock */ |
74 | static ev_tstamp now, diff; /* monotonic clock */ |
36 | ev_tstamp ev_now; |
75 | ev_tstamp ev_now; |
37 | int ev_method; |
76 | int ev_method; |
38 | |
77 | |
39 | static int have_monotonic; /* runtime */ |
78 | static int have_monotonic; /* runtime */ |
40 | |
79 | |
41 | static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ |
80 | static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ |
42 | static void (*method_modify)(int fd, int oev, int nev); |
81 | static void (*method_modify)(int fd, int oev, int nev); |
43 | static void (*method_poll)(ev_tstamp timeout); |
82 | static void (*method_poll)(ev_tstamp timeout); |
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83 | |
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84 | /*****************************************************************************/ |
44 | |
85 | |
45 | ev_tstamp |
86 | ev_tstamp |
46 | ev_time (void) |
87 | ev_time (void) |
47 | { |
88 | { |
48 | #if HAVE_REALTIME |
89 | #if HAVE_REALTIME |
… | |
… | |
73 | |
114 | |
74 | #define array_needsize(base,cur,cnt,init) \ |
115 | #define array_needsize(base,cur,cnt,init) \ |
75 | if ((cnt) > cur) \ |
116 | if ((cnt) > cur) \ |
76 | { \ |
117 | { \ |
77 | int newcnt = cur ? cur << 1 : 16; \ |
118 | int newcnt = cur ? cur << 1 : 16; \ |
78 | fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ |
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79 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
119 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
80 | init (base + cur, newcnt - cur); \ |
120 | init (base + cur, newcnt - cur); \ |
81 | cur = newcnt; \ |
121 | cur = newcnt; \ |
82 | } |
122 | } |
83 | |
123 | |
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124 | /*****************************************************************************/ |
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125 | |
84 | typedef struct |
126 | typedef struct |
85 | { |
127 | { |
86 | struct ev_io *head; |
128 | struct ev_io *head; |
87 | unsigned char wev, rev; /* want, received event set */ |
129 | unsigned char wev, rev; /* want, received event set */ |
88 | } ANFD; |
130 | } ANFD; |
… | |
… | |
104 | } |
146 | } |
105 | } |
147 | } |
106 | |
148 | |
107 | typedef struct |
149 | typedef struct |
108 | { |
150 | { |
109 | struct ev_watcher *w; |
151 | W w; |
110 | int events; |
152 | int events; |
111 | } ANPENDING; |
153 | } ANPENDING; |
112 | |
154 | |
113 | static ANPENDING *pendings; |
155 | static ANPENDING *pendings; |
114 | static int pendingmax, pendingcnt; |
156 | static int pendingmax, pendingcnt; |
115 | |
157 | |
116 | static void |
158 | static void |
117 | event (struct ev_watcher *w, int events) |
159 | event (W w, int events) |
118 | { |
160 | { |
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161 | if (w->active) |
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162 | { |
119 | w->pending = ++pendingcnt; |
163 | w->pending = ++pendingcnt; |
120 | array_needsize (pendings, pendingmax, pendingcnt, ); |
164 | array_needsize (pendings, pendingmax, pendingcnt, ); |
121 | pendings [pendingcnt - 1].w = w; |
165 | pendings [pendingcnt - 1].w = w; |
122 | pendings [pendingcnt - 1].events = events; |
166 | pendings [pendingcnt - 1].events = events; |
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167 | } |
123 | } |
168 | } |
124 | |
169 | |
125 | static void |
170 | static void |
126 | fd_event (int fd, int events) |
171 | fd_event (int fd, int events) |
127 | { |
172 | { |
… | |
… | |
131 | for (w = anfd->head; w; w = w->next) |
176 | for (w = anfd->head; w; w = w->next) |
132 | { |
177 | { |
133 | int ev = w->events & events; |
178 | int ev = w->events & events; |
134 | |
179 | |
135 | if (ev) |
180 | if (ev) |
136 | event ((struct ev_watcher *)w, ev); |
181 | event ((W)w, ev); |
137 | } |
182 | } |
138 | } |
183 | } |
139 | |
184 | |
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185 | static void |
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186 | queue_events (W *events, int eventcnt, int type) |
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187 | { |
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188 | int i; |
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189 | |
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190 | for (i = 0; i < eventcnt; ++i) |
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191 | event (events [i], type); |
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192 | } |
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193 | |
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194 | /* called on EBADF to verify fds */ |
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195 | static void |
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196 | fd_recheck () |
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197 | { |
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198 | int fd; |
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199 | |
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200 | for (fd = 0; fd < anfdmax; ++fd) |
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201 | if (anfds [fd].wev) |
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202 | if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) |
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203 | while (anfds [fd].head) |
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204 | evio_stop (anfds [fd].head); |
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205 | } |
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206 | |
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207 | /*****************************************************************************/ |
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208 | |
140 | static struct ev_timer **atimers; |
209 | static struct ev_timer **timers; |
141 | static int atimermax, atimercnt; |
210 | static int timermax, timercnt; |
142 | |
211 | |
143 | static struct ev_timer **rtimers; |
212 | static struct ev_periodic **periodics; |
144 | static int rtimermax, rtimercnt; |
213 | static int periodicmax, periodiccnt; |
145 | |
214 | |
146 | static void |
215 | static void |
147 | upheap (struct ev_timer **timers, int k) |
216 | upheap (WT *timers, int k) |
148 | { |
217 | { |
149 | struct ev_timer *w = timers [k]; |
218 | WT w = timers [k]; |
150 | |
219 | |
151 | while (k && timers [k >> 1]->at > w->at) |
220 | while (k && timers [k >> 1]->at > w->at) |
152 | { |
221 | { |
153 | timers [k] = timers [k >> 1]; |
222 | timers [k] = timers [k >> 1]; |
154 | timers [k]->active = k + 1; |
223 | timers [k]->active = k + 1; |
… | |
… | |
159 | timers [k]->active = k + 1; |
228 | timers [k]->active = k + 1; |
160 | |
229 | |
161 | } |
230 | } |
162 | |
231 | |
163 | static void |
232 | static void |
164 | downheap (struct ev_timer **timers, int N, int k) |
233 | downheap (WT *timers, int N, int k) |
165 | { |
234 | { |
166 | struct ev_timer *w = timers [k]; |
235 | WT w = timers [k]; |
167 | |
236 | |
168 | while (k < (N >> 1)) |
237 | while (k < (N >> 1)) |
169 | { |
238 | { |
170 | int j = k << 1; |
239 | int j = k << 1; |
171 | |
240 | |
… | |
… | |
181 | } |
250 | } |
182 | |
251 | |
183 | timers [k] = w; |
252 | timers [k] = w; |
184 | timers [k]->active = k + 1; |
253 | timers [k]->active = k + 1; |
185 | } |
254 | } |
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255 | |
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256 | /*****************************************************************************/ |
186 | |
257 | |
187 | typedef struct |
258 | typedef struct |
188 | { |
259 | { |
189 | struct ev_signal *head; |
260 | struct ev_signal *head; |
190 | sig_atomic_t gotsig; |
261 | sig_atomic_t gotsig; |
… | |
… | |
233 | if (signals [sig].gotsig) |
304 | if (signals [sig].gotsig) |
234 | { |
305 | { |
235 | signals [sig].gotsig = 0; |
306 | signals [sig].gotsig = 0; |
236 | |
307 | |
237 | for (w = signals [sig].head; w; w = w->next) |
308 | for (w = signals [sig].head; w; w = w->next) |
238 | event ((struct ev_watcher *)w, EV_SIGNAL); |
309 | event ((W)w, EV_SIGNAL); |
239 | } |
310 | } |
240 | } |
311 | } |
241 | |
312 | |
242 | static void |
313 | static void |
243 | siginit (void) |
314 | siginit (void) |
… | |
… | |
250 | fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); |
321 | fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); |
251 | |
322 | |
252 | evio_set (&sigev, sigpipe [0], EV_READ); |
323 | evio_set (&sigev, sigpipe [0], EV_READ); |
253 | evio_start (&sigev); |
324 | evio_start (&sigev); |
254 | } |
325 | } |
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326 | |
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327 | /*****************************************************************************/ |
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328 | |
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329 | static struct ev_idle **idles; |
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330 | static int idlemax, idlecnt; |
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331 | |
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332 | static struct ev_prepare **prepares; |
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333 | static int preparemax, preparecnt; |
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334 | |
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335 | static struct ev_check **checks; |
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336 | static int checkmax, checkcnt; |
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337 | |
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338 | /*****************************************************************************/ |
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339 | |
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340 | static struct ev_child *childs [PID_HASHSIZE]; |
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341 | static struct ev_signal childev; |
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342 | |
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343 | #ifndef WCONTINUED |
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344 | # define WCONTINUED 0 |
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345 | #endif |
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346 | |
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347 | static void |
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348 | childcb (struct ev_signal *sw, int revents) |
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349 | { |
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350 | struct ev_child *w; |
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351 | int pid, status; |
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352 | |
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353 | while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) |
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354 | for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) |
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355 | if (w->pid == pid || w->pid == -1) |
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356 | { |
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357 | w->status = status; |
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358 | event ((W)w, EV_CHILD); |
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359 | } |
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360 | } |
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361 | |
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362 | /*****************************************************************************/ |
255 | |
363 | |
256 | #if HAVE_EPOLL |
364 | #if HAVE_EPOLL |
257 | # include "ev_epoll.c" |
365 | # include "ev_epoll.c" |
258 | #endif |
366 | #endif |
259 | #if HAVE_SELECT |
367 | #if HAVE_SELECT |
… | |
… | |
285 | if (ev_method == EVMETHOD_NONE) select_init (flags); |
393 | if (ev_method == EVMETHOD_NONE) select_init (flags); |
286 | #endif |
394 | #endif |
287 | |
395 | |
288 | if (ev_method) |
396 | if (ev_method) |
289 | { |
397 | { |
290 | evw_init (&sigev, sigcb, 0); |
398 | evw_init (&sigev, sigcb); |
291 | siginit (); |
399 | siginit (); |
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400 | |
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401 | evsignal_init (&childev, childcb, SIGCHLD); |
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402 | evsignal_start (&childev); |
292 | } |
403 | } |
293 | |
404 | |
294 | return ev_method; |
405 | return ev_method; |
295 | } |
406 | } |
296 | |
407 | |
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408 | /*****************************************************************************/ |
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409 | |
297 | void ev_prefork (void) |
410 | void ev_prefork (void) |
298 | { |
411 | { |
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412 | /* nop */ |
299 | } |
413 | } |
300 | |
414 | |
301 | void ev_postfork_parent (void) |
415 | void ev_postfork_parent (void) |
302 | { |
416 | { |
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417 | /* nop */ |
303 | } |
418 | } |
304 | |
419 | |
305 | void ev_postfork_child (void) |
420 | void ev_postfork_child (void) |
306 | { |
421 | { |
307 | #if HAVE_EPOLL |
422 | #if HAVE_EPOLL |
… | |
… | |
314 | close (sigpipe [1]); |
429 | close (sigpipe [1]); |
315 | pipe (sigpipe); |
430 | pipe (sigpipe); |
316 | siginit (); |
431 | siginit (); |
317 | } |
432 | } |
318 | |
433 | |
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434 | /*****************************************************************************/ |
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435 | |
319 | static void |
436 | static void |
320 | fd_reify (void) |
437 | fd_reify (void) |
321 | { |
438 | { |
322 | int i; |
439 | int i; |
323 | |
440 | |
… | |
… | |
343 | } |
460 | } |
344 | |
461 | |
345 | static void |
462 | static void |
346 | call_pending () |
463 | call_pending () |
347 | { |
464 | { |
348 | int i; |
465 | while (pendingcnt) |
349 | |
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350 | for (i = 0; i < pendingcnt; ++i) |
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351 | { |
466 | { |
352 | ANPENDING *p = pendings + i; |
467 | ANPENDING *p = pendings + --pendingcnt; |
353 | |
468 | |
354 | if (p->w) |
469 | if (p->w) |
355 | { |
470 | { |
356 | p->w->pending = 0; |
471 | p->w->pending = 0; |
357 | p->w->cb (p->w, p->events); |
472 | p->w->cb (p->w, p->events); |
358 | } |
473 | } |
359 | } |
474 | } |
360 | |
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361 | pendingcnt = 0; |
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362 | } |
475 | } |
363 | |
476 | |
364 | static void |
477 | static void |
365 | timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now) |
478 | timers_reify () |
366 | { |
479 | { |
367 | while (timercnt && timers [0]->at <= now) |
480 | while (timercnt && timers [0]->at <= now) |
368 | { |
481 | { |
369 | struct ev_timer *w = timers [0]; |
482 | struct ev_timer *w = timers [0]; |
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483 | |
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484 | event ((W)w, EV_TIMEOUT); |
370 | |
485 | |
371 | /* first reschedule or stop timer */ |
486 | /* first reschedule or stop timer */ |
372 | if (w->repeat) |
487 | if (w->repeat) |
373 | { |
488 | { |
374 | if (w->is_abs) |
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375 | w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat; |
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376 | else |
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377 | w->at = now + w->repeat; |
489 | w->at = now + w->repeat; |
378 | |
490 | assert (("timer timeout in the past, negative repeat?", w->at > now)); |
379 | assert (w->at > now); |
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380 | |
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381 | downheap (timers, timercnt, 0); |
491 | downheap ((WT *)timers, timercnt, 0); |
382 | } |
492 | } |
383 | else |
493 | else |
384 | { |
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385 | evtimer_stop (w); /* nonrepeating: stop timer */ |
494 | evtimer_stop (w); /* nonrepeating: stop timer */ |
386 | --timercnt; /* maybe pass by reference instead? */ |
495 | } |
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496 | } |
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497 | |
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498 | static void |
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499 | periodics_reify () |
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500 | { |
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501 | while (periodiccnt && periodics [0]->at <= ev_now) |
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502 | { |
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503 | struct ev_periodic *w = periodics [0]; |
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504 | |
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505 | /* first reschedule or stop timer */ |
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506 | if (w->interval) |
387 | } |
507 | { |
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508 | w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; |
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509 | assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); |
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510 | downheap ((WT *)periodics, periodiccnt, 0); |
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511 | } |
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512 | else |
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513 | evperiodic_stop (w); /* nonrepeating: stop timer */ |
388 | |
514 | |
389 | event ((struct ev_watcher *)w, EV_TIMEOUT); |
515 | event ((W)w, EV_TIMEOUT); |
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516 | } |
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517 | } |
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518 | |
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519 | static void |
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520 | periodics_reschedule (ev_tstamp diff) |
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521 | { |
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522 | int i; |
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523 | |
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524 | /* adjust periodics after time jump */ |
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525 | for (i = 0; i < periodiccnt; ++i) |
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526 | { |
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527 | struct ev_periodic *w = periodics [i]; |
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528 | |
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529 | if (w->interval) |
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530 | { |
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531 | ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; |
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532 | |
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533 | if (fabs (diff) >= 1e-4) |
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534 | { |
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535 | evperiodic_stop (w); |
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536 | evperiodic_start (w); |
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537 | |
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538 | i = 0; /* restart loop, inefficient, but time jumps should be rare */ |
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539 | } |
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540 | } |
390 | } |
541 | } |
391 | } |
542 | } |
392 | |
543 | |
393 | static void |
544 | static void |
394 | time_update () |
545 | time_update () |
395 | { |
546 | { |
396 | int i; |
547 | int i; |
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548 | |
397 | ev_now = ev_time (); |
549 | ev_now = ev_time (); |
398 | |
550 | |
399 | if (have_monotonic) |
551 | if (have_monotonic) |
400 | { |
552 | { |
401 | ev_tstamp odiff = diff; |
553 | ev_tstamp odiff = diff; |
402 | |
554 | |
403 | /* detecting time jumps is much more difficult */ |
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404 | for (i = 2; --i; ) /* loop a few times, before making important decisions */ |
555 | for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
405 | { |
556 | { |
406 | now = get_clock (); |
557 | now = get_clock (); |
407 | diff = ev_now - now; |
558 | diff = ev_now - now; |
408 | |
559 | |
409 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
560 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
410 | return; /* all is well */ |
561 | return; /* all is well */ |
411 | |
562 | |
412 | ev_now = ev_time (); |
563 | ev_now = ev_time (); |
413 | } |
564 | } |
414 | |
565 | |
415 | /* time jump detected, reschedule atimers */ |
566 | periodics_reschedule (diff - odiff); |
416 | for (i = 0; i < atimercnt; ++i) |
567 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
417 | { |
|
|
418 | struct ev_timer *w = atimers [i]; |
|
|
419 | w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat; |
|
|
420 | } |
|
|
421 | } |
568 | } |
422 | else |
569 | else |
423 | { |
570 | { |
424 | if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) |
571 | if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) |
425 | /* time jump detected, adjust rtimers */ |
572 | { |
|
|
573 | periodics_reschedule (ev_now - now); |
|
|
574 | |
|
|
575 | /* adjust timers. this is easy, as the offset is the same for all */ |
426 | for (i = 0; i < rtimercnt; ++i) |
576 | for (i = 0; i < timercnt; ++i) |
427 | rtimers [i]->at += ev_now - now; |
577 | timers [i]->at += diff; |
|
|
578 | } |
428 | |
579 | |
429 | now = ev_now; |
580 | now = ev_now; |
430 | } |
581 | } |
431 | } |
582 | } |
432 | |
583 | |
433 | int ev_loop_done; |
584 | int ev_loop_done; |
434 | |
585 | |
435 | void ev_loop (int flags) |
586 | void ev_loop (int flags) |
436 | { |
587 | { |
437 | double block; |
588 | double block; |
438 | ev_loop_done = flags & EVLOOP_ONESHOT; |
589 | ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0; |
439 | |
590 | |
440 | do |
591 | do |
441 | { |
592 | { |
|
|
593 | /* queue check watchers (and execute them) */ |
|
|
594 | if (preparecnt) |
|
|
595 | { |
|
|
596 | queue_events ((W *)prepares, preparecnt, EV_PREPARE); |
|
|
597 | call_pending (); |
|
|
598 | } |
|
|
599 | |
442 | /* update fd-related kernel structures */ |
600 | /* update fd-related kernel structures */ |
443 | fd_reify (); |
601 | fd_reify (); |
444 | |
602 | |
445 | /* calculate blocking time */ |
603 | /* calculate blocking time */ |
|
|
604 | |
|
|
605 | /* we only need this for !monotonic clockor timers, but as we basically |
|
|
606 | always have timers, we just calculate it always */ |
|
|
607 | ev_now = ev_time (); |
|
|
608 | |
446 | if (flags & EVLOOP_NONBLOCK) |
609 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
447 | block = 0.; |
610 | block = 0.; |
448 | else |
611 | else |
449 | { |
612 | { |
450 | block = MAX_BLOCKTIME; |
613 | block = MAX_BLOCKTIME; |
451 | |
614 | |
452 | if (rtimercnt) |
615 | if (timercnt) |
453 | { |
616 | { |
454 | ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge; |
617 | ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; |
455 | if (block > to) block = to; |
618 | if (block > to) block = to; |
456 | } |
619 | } |
457 | |
620 | |
458 | if (atimercnt) |
621 | if (periodiccnt) |
459 | { |
622 | { |
460 | ev_tstamp to = atimers [0]->at - ev_time () + method_fudge; |
623 | ev_tstamp to = periodics [0]->at - ev_now + method_fudge; |
461 | if (block > to) block = to; |
624 | if (block > to) block = to; |
462 | } |
625 | } |
463 | |
626 | |
464 | if (block < 0.) block = 0.; |
627 | if (block < 0.) block = 0.; |
465 | } |
628 | } |
… | |
… | |
467 | method_poll (block); |
630 | method_poll (block); |
468 | |
631 | |
469 | /* update ev_now, do magic */ |
632 | /* update ev_now, do magic */ |
470 | time_update (); |
633 | time_update (); |
471 | |
634 | |
472 | /* put pending timers into pendign queue and reschedule them */ |
635 | /* queue pending timers and reschedule them */ |
473 | /* absolute timers first */ |
636 | timers_reify (); /* relative timers called last */ |
474 | timers_reify (atimers, atimercnt, ev_now); |
637 | periodics_reify (); /* absolute timers called first */ |
475 | /* relative timers second */ |
638 | |
476 | timers_reify (rtimers, rtimercnt, now); |
639 | /* queue idle watchers unless io or timers are pending */ |
|
|
640 | if (!pendingcnt) |
|
|
641 | queue_events ((W *)idles, idlecnt, EV_IDLE); |
|
|
642 | |
|
|
643 | /* queue check watchers, to be executed first */ |
|
|
644 | if (checkcnt) |
|
|
645 | queue_events ((W *)checks, checkcnt, EV_CHECK); |
477 | |
646 | |
478 | call_pending (); |
647 | call_pending (); |
479 | } |
648 | } |
480 | while (!ev_loop_done); |
649 | while (!ev_loop_done); |
481 | } |
|
|
482 | |
650 | |
|
|
651 | if (ev_loop_done != 2) |
|
|
652 | ev_loop_done = 0; |
|
|
653 | } |
|
|
654 | |
|
|
655 | /*****************************************************************************/ |
|
|
656 | |
483 | static void |
657 | static void |
484 | wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem) |
658 | wlist_add (WL *head, WL elem) |
485 | { |
659 | { |
486 | elem->next = *head; |
660 | elem->next = *head; |
487 | *head = elem; |
661 | *head = elem; |
488 | } |
662 | } |
489 | |
663 | |
490 | static void |
664 | static void |
491 | wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem) |
665 | wlist_del (WL *head, WL elem) |
492 | { |
666 | { |
493 | while (*head) |
667 | while (*head) |
494 | { |
668 | { |
495 | if (*head == elem) |
669 | if (*head == elem) |
496 | { |
670 | { |
… | |
… | |
501 | head = &(*head)->next; |
675 | head = &(*head)->next; |
502 | } |
676 | } |
503 | } |
677 | } |
504 | |
678 | |
505 | static void |
679 | static void |
506 | ev_start (struct ev_watcher *w, int active) |
680 | ev_clear (W w) |
507 | { |
681 | { |
|
|
682 | if (w->pending) |
|
|
683 | { |
|
|
684 | pendings [w->pending - 1].w = 0; |
508 | w->pending = 0; |
685 | w->pending = 0; |
|
|
686 | } |
|
|
687 | } |
|
|
688 | |
|
|
689 | static void |
|
|
690 | ev_start (W w, int active) |
|
|
691 | { |
509 | w->active = active; |
692 | w->active = active; |
510 | } |
693 | } |
511 | |
694 | |
512 | static void |
695 | static void |
513 | ev_stop (struct ev_watcher *w) |
696 | ev_stop (W w) |
514 | { |
697 | { |
515 | if (w->pending) |
|
|
516 | pendings [w->pending - 1].w = 0; |
|
|
517 | |
|
|
518 | w->active = 0; |
698 | w->active = 0; |
519 | /* nop */ |
|
|
520 | } |
699 | } |
|
|
700 | |
|
|
701 | /*****************************************************************************/ |
521 | |
702 | |
522 | void |
703 | void |
523 | evio_start (struct ev_io *w) |
704 | evio_start (struct ev_io *w) |
524 | { |
705 | { |
525 | if (ev_is_active (w)) |
706 | if (ev_is_active (w)) |
526 | return; |
707 | return; |
527 | |
708 | |
528 | int fd = w->fd; |
709 | int fd = w->fd; |
529 | |
710 | |
530 | ev_start ((struct ev_watcher *)w, 1); |
711 | ev_start ((W)w, 1); |
531 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
712 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
532 | wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w); |
713 | wlist_add ((WL *)&anfds[fd].head, (WL)w); |
533 | |
714 | |
534 | ++fdchangecnt; |
715 | ++fdchangecnt; |
535 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
716 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
536 | fdchanges [fdchangecnt - 1] = fd; |
717 | fdchanges [fdchangecnt - 1] = fd; |
537 | } |
718 | } |
538 | |
719 | |
539 | void |
720 | void |
540 | evio_stop (struct ev_io *w) |
721 | evio_stop (struct ev_io *w) |
541 | { |
722 | { |
|
|
723 | ev_clear ((W)w); |
542 | if (!ev_is_active (w)) |
724 | if (!ev_is_active (w)) |
543 | return; |
725 | return; |
544 | |
726 | |
545 | wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w); |
727 | wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
546 | ev_stop ((struct ev_watcher *)w); |
728 | ev_stop ((W)w); |
547 | |
729 | |
548 | ++fdchangecnt; |
730 | ++fdchangecnt; |
549 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
731 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
550 | fdchanges [fdchangecnt - 1] = w->fd; |
732 | fdchanges [fdchangecnt - 1] = w->fd; |
551 | } |
733 | } |
… | |
… | |
554 | evtimer_start (struct ev_timer *w) |
736 | evtimer_start (struct ev_timer *w) |
555 | { |
737 | { |
556 | if (ev_is_active (w)) |
738 | if (ev_is_active (w)) |
557 | return; |
739 | return; |
558 | |
740 | |
559 | if (w->is_abs) |
741 | w->at += now; |
560 | { |
|
|
561 | /* this formula differs from the one in timer_reify becuse we do not round up */ |
|
|
562 | if (w->repeat) |
|
|
563 | w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat; |
|
|
564 | |
742 | |
565 | ev_start ((struct ev_watcher *)w, ++atimercnt); |
743 | assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); |
|
|
744 | |
|
|
745 | ev_start ((W)w, ++timercnt); |
566 | array_needsize (atimers, atimermax, atimercnt, ); |
746 | array_needsize (timers, timermax, timercnt, ); |
567 | atimers [atimercnt - 1] = w; |
747 | timers [timercnt - 1] = w; |
568 | upheap (atimers, atimercnt - 1); |
748 | upheap ((WT *)timers, timercnt - 1); |
569 | } |
|
|
570 | else |
|
|
571 | { |
|
|
572 | w->at += now; |
|
|
573 | |
|
|
574 | ev_start ((struct ev_watcher *)w, ++rtimercnt); |
|
|
575 | array_needsize (rtimers, rtimermax, rtimercnt, ); |
|
|
576 | rtimers [rtimercnt - 1] = w; |
|
|
577 | upheap (rtimers, rtimercnt - 1); |
|
|
578 | } |
|
|
579 | |
|
|
580 | } |
749 | } |
581 | |
750 | |
582 | void |
751 | void |
583 | evtimer_stop (struct ev_timer *w) |
752 | evtimer_stop (struct ev_timer *w) |
584 | { |
753 | { |
|
|
754 | ev_clear ((W)w); |
585 | if (!ev_is_active (w)) |
755 | if (!ev_is_active (w)) |
586 | return; |
756 | return; |
587 | |
757 | |
588 | if (w->is_abs) |
|
|
589 | { |
|
|
590 | if (w->active < atimercnt--) |
758 | if (w->active < timercnt--) |
591 | { |
759 | { |
592 | atimers [w->active - 1] = atimers [atimercnt]; |
760 | timers [w->active - 1] = timers [timercnt]; |
|
|
761 | downheap ((WT *)timers, timercnt, w->active - 1); |
|
|
762 | } |
|
|
763 | |
|
|
764 | w->at = w->repeat; |
|
|
765 | |
|
|
766 | ev_stop ((W)w); |
|
|
767 | } |
|
|
768 | |
|
|
769 | void |
|
|
770 | evtimer_again (struct ev_timer *w) |
|
|
771 | { |
|
|
772 | if (ev_is_active (w)) |
|
|
773 | { |
|
|
774 | if (w->repeat) |
|
|
775 | { |
|
|
776 | w->at = now + w->repeat; |
593 | downheap (atimers, atimercnt, w->active - 1); |
777 | downheap ((WT *)timers, timercnt, w->active - 1); |
594 | } |
|
|
595 | } |
|
|
596 | else |
|
|
597 | { |
|
|
598 | if (w->active < rtimercnt--) |
|
|
599 | { |
778 | } |
600 | rtimers [w->active - 1] = rtimers [rtimercnt]; |
779 | else |
601 | downheap (rtimers, rtimercnt, w->active - 1); |
780 | evtimer_stop (w); |
602 | } |
781 | } |
|
|
782 | else if (w->repeat) |
|
|
783 | evtimer_start (w); |
|
|
784 | } |
|
|
785 | |
|
|
786 | void |
|
|
787 | evperiodic_start (struct ev_periodic *w) |
|
|
788 | { |
|
|
789 | if (ev_is_active (w)) |
|
|
790 | return; |
|
|
791 | |
|
|
792 | assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); |
|
|
793 | |
|
|
794 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
|
|
795 | if (w->interval) |
|
|
796 | w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; |
|
|
797 | |
|
|
798 | ev_start ((W)w, ++periodiccnt); |
|
|
799 | array_needsize (periodics, periodicmax, periodiccnt, ); |
|
|
800 | periodics [periodiccnt - 1] = w; |
|
|
801 | upheap ((WT *)periodics, periodiccnt - 1); |
|
|
802 | } |
|
|
803 | |
|
|
804 | void |
|
|
805 | evperiodic_stop (struct ev_periodic *w) |
|
|
806 | { |
|
|
807 | ev_clear ((W)w); |
|
|
808 | if (!ev_is_active (w)) |
|
|
809 | return; |
|
|
810 | |
|
|
811 | if (w->active < periodiccnt--) |
603 | } |
812 | { |
|
|
813 | periodics [w->active - 1] = periodics [periodiccnt]; |
|
|
814 | downheap ((WT *)periodics, periodiccnt, w->active - 1); |
|
|
815 | } |
604 | |
816 | |
605 | ev_stop ((struct ev_watcher *)w); |
817 | ev_stop ((W)w); |
606 | } |
818 | } |
607 | |
819 | |
608 | void |
820 | void |
609 | evsignal_start (struct ev_signal *w) |
821 | evsignal_start (struct ev_signal *w) |
610 | { |
822 | { |
611 | if (ev_is_active (w)) |
823 | if (ev_is_active (w)) |
612 | return; |
824 | return; |
613 | |
825 | |
614 | ev_start ((struct ev_watcher *)w, 1); |
826 | ev_start ((W)w, 1); |
615 | array_needsize (signals, signalmax, w->signum, signals_init); |
827 | array_needsize (signals, signalmax, w->signum, signals_init); |
616 | wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w); |
828 | wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
617 | |
829 | |
618 | if (!w->next) |
830 | if (!w->next) |
619 | { |
831 | { |
620 | struct sigaction sa; |
832 | struct sigaction sa; |
621 | sa.sa_handler = sighandler; |
833 | sa.sa_handler = sighandler; |
… | |
… | |
626 | } |
838 | } |
627 | |
839 | |
628 | void |
840 | void |
629 | evsignal_stop (struct ev_signal *w) |
841 | evsignal_stop (struct ev_signal *w) |
630 | { |
842 | { |
|
|
843 | ev_clear ((W)w); |
631 | if (!ev_is_active (w)) |
844 | if (!ev_is_active (w)) |
632 | return; |
845 | return; |
633 | |
846 | |
634 | wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w); |
847 | wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
635 | ev_stop ((struct ev_watcher *)w); |
848 | ev_stop ((W)w); |
636 | |
849 | |
637 | if (!signals [w->signum - 1].head) |
850 | if (!signals [w->signum - 1].head) |
638 | signal (w->signum, SIG_DFL); |
851 | signal (w->signum, SIG_DFL); |
639 | } |
852 | } |
640 | |
853 | |
|
|
854 | void evidle_start (struct ev_idle *w) |
|
|
855 | { |
|
|
856 | if (ev_is_active (w)) |
|
|
857 | return; |
|
|
858 | |
|
|
859 | ev_start ((W)w, ++idlecnt); |
|
|
860 | array_needsize (idles, idlemax, idlecnt, ); |
|
|
861 | idles [idlecnt - 1] = w; |
|
|
862 | } |
|
|
863 | |
|
|
864 | void evidle_stop (struct ev_idle *w) |
|
|
865 | { |
|
|
866 | ev_clear ((W)w); |
|
|
867 | if (ev_is_active (w)) |
|
|
868 | return; |
|
|
869 | |
|
|
870 | idles [w->active - 1] = idles [--idlecnt]; |
|
|
871 | ev_stop ((W)w); |
|
|
872 | } |
|
|
873 | |
|
|
874 | void evprepare_start (struct ev_prepare *w) |
|
|
875 | { |
|
|
876 | if (ev_is_active (w)) |
|
|
877 | return; |
|
|
878 | |
|
|
879 | ev_start ((W)w, ++preparecnt); |
|
|
880 | array_needsize (prepares, preparemax, preparecnt, ); |
|
|
881 | prepares [preparecnt - 1] = w; |
|
|
882 | } |
|
|
883 | |
|
|
884 | void evprepare_stop (struct ev_prepare *w) |
|
|
885 | { |
|
|
886 | ev_clear ((W)w); |
|
|
887 | if (ev_is_active (w)) |
|
|
888 | return; |
|
|
889 | |
|
|
890 | prepares [w->active - 1] = prepares [--preparecnt]; |
|
|
891 | ev_stop ((W)w); |
|
|
892 | } |
|
|
893 | |
|
|
894 | void evcheck_start (struct ev_check *w) |
|
|
895 | { |
|
|
896 | if (ev_is_active (w)) |
|
|
897 | return; |
|
|
898 | |
|
|
899 | ev_start ((W)w, ++checkcnt); |
|
|
900 | array_needsize (checks, checkmax, checkcnt, ); |
|
|
901 | checks [checkcnt - 1] = w; |
|
|
902 | } |
|
|
903 | |
|
|
904 | void evcheck_stop (struct ev_check *w) |
|
|
905 | { |
|
|
906 | ev_clear ((W)w); |
|
|
907 | if (ev_is_active (w)) |
|
|
908 | return; |
|
|
909 | |
|
|
910 | checks [w->active - 1] = checks [--checkcnt]; |
|
|
911 | ev_stop ((W)w); |
|
|
912 | } |
|
|
913 | |
|
|
914 | void evchild_start (struct ev_child *w) |
|
|
915 | { |
|
|
916 | if (ev_is_active (w)) |
|
|
917 | return; |
|
|
918 | |
|
|
919 | ev_start ((W)w, 1); |
|
|
920 | wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
|
|
921 | } |
|
|
922 | |
|
|
923 | void evchild_stop (struct ev_child *w) |
|
|
924 | { |
|
|
925 | ev_clear ((W)w); |
|
|
926 | if (ev_is_active (w)) |
|
|
927 | return; |
|
|
928 | |
|
|
929 | wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
|
|
930 | ev_stop ((W)w); |
|
|
931 | } |
|
|
932 | |
641 | /*****************************************************************************/ |
933 | /*****************************************************************************/ |
|
|
934 | |
|
|
935 | struct ev_once |
|
|
936 | { |
|
|
937 | struct ev_io io; |
|
|
938 | struct ev_timer to; |
|
|
939 | void (*cb)(int revents, void *arg); |
|
|
940 | void *arg; |
|
|
941 | }; |
|
|
942 | |
|
|
943 | static void |
|
|
944 | once_cb (struct ev_once *once, int revents) |
|
|
945 | { |
|
|
946 | void (*cb)(int revents, void *arg) = once->cb; |
|
|
947 | void *arg = once->arg; |
|
|
948 | |
|
|
949 | evio_stop (&once->io); |
|
|
950 | evtimer_stop (&once->to); |
|
|
951 | free (once); |
|
|
952 | |
|
|
953 | cb (revents, arg); |
|
|
954 | } |
|
|
955 | |
|
|
956 | static void |
|
|
957 | once_cb_io (struct ev_io *w, int revents) |
|
|
958 | { |
|
|
959 | once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
|
|
960 | } |
|
|
961 | |
|
|
962 | static void |
|
|
963 | once_cb_to (struct ev_timer *w, int revents) |
|
|
964 | { |
|
|
965 | once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
|
|
966 | } |
|
|
967 | |
|
|
968 | void |
|
|
969 | ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
|
|
970 | { |
|
|
971 | struct ev_once *once = malloc (sizeof (struct ev_once)); |
|
|
972 | |
|
|
973 | if (!once) |
|
|
974 | cb (EV_ERROR, arg); |
|
|
975 | else |
|
|
976 | { |
|
|
977 | once->cb = cb; |
|
|
978 | once->arg = arg; |
|
|
979 | |
|
|
980 | evw_init (&once->io, once_cb_io); |
|
|
981 | |
|
|
982 | if (fd >= 0) |
|
|
983 | { |
|
|
984 | evio_set (&once->io, fd, events); |
|
|
985 | evio_start (&once->io); |
|
|
986 | } |
|
|
987 | |
|
|
988 | evw_init (&once->to, once_cb_to); |
|
|
989 | |
|
|
990 | if (timeout >= 0.) |
|
|
991 | { |
|
|
992 | evtimer_set (&once->to, timeout, 0.); |
|
|
993 | evtimer_start (&once->to); |
|
|
994 | } |
|
|
995 | } |
|
|
996 | } |
|
|
997 | |
|
|
998 | /*****************************************************************************/ |
|
|
999 | |
642 | #if 1 |
1000 | #if 0 |
|
|
1001 | |
|
|
1002 | struct ev_io wio; |
643 | |
1003 | |
644 | static void |
1004 | static void |
645 | sin_cb (struct ev_io *w, int revents) |
1005 | sin_cb (struct ev_io *w, int revents) |
646 | { |
1006 | { |
647 | fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); |
1007 | fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); |
… | |
… | |
657 | |
1017 | |
658 | static void |
1018 | static void |
659 | scb (struct ev_signal *w, int revents) |
1019 | scb (struct ev_signal *w, int revents) |
660 | { |
1020 | { |
661 | fprintf (stderr, "signal %x,%d\n", revents, w->signum); |
1021 | fprintf (stderr, "signal %x,%d\n", revents, w->signum); |
|
|
1022 | evio_stop (&wio); |
|
|
1023 | evio_start (&wio); |
|
|
1024 | } |
|
|
1025 | |
|
|
1026 | static void |
|
|
1027 | gcb (struct ev_signal *w, int revents) |
|
|
1028 | { |
|
|
1029 | fprintf (stderr, "generic %x\n", revents); |
|
|
1030 | |
662 | } |
1031 | } |
663 | |
1032 | |
664 | int main (void) |
1033 | int main (void) |
665 | { |
1034 | { |
666 | struct ev_io sin; |
|
|
667 | |
|
|
668 | ev_init (0); |
1035 | ev_init (0); |
669 | |
1036 | |
670 | evw_init (&sin, sin_cb, 55); |
|
|
671 | evio_set (&sin, 0, EV_READ); |
1037 | evio_init (&wio, sin_cb, 0, EV_READ); |
672 | evio_start (&sin); |
1038 | evio_start (&wio); |
673 | |
1039 | |
674 | struct ev_timer t[10000]; |
1040 | struct ev_timer t[10000]; |
675 | |
1041 | |
676 | #if 0 |
1042 | #if 0 |
677 | int i; |
1043 | int i; |
678 | for (i = 0; i < 10000; ++i) |
1044 | for (i = 0; i < 10000; ++i) |
679 | { |
1045 | { |
680 | struct ev_timer *w = t + i; |
1046 | struct ev_timer *w = t + i; |
681 | evw_init (w, ocb, i); |
1047 | evw_init (w, ocb, i); |
682 | evtimer_set_abs (w, drand48 (), 0.99775533); |
1048 | evtimer_init_abs (w, ocb, drand48 (), 0.99775533); |
683 | evtimer_start (w); |
1049 | evtimer_start (w); |
684 | if (drand48 () < 0.5) |
1050 | if (drand48 () < 0.5) |
685 | evtimer_stop (w); |
1051 | evtimer_stop (w); |
686 | } |
1052 | } |
687 | #endif |
1053 | #endif |
688 | |
1054 | |
689 | struct ev_timer t1; |
1055 | struct ev_timer t1; |
690 | evw_init (&t1, ocb, 0); |
1056 | evtimer_init (&t1, ocb, 5, 10); |
691 | evtimer_set_abs (&t1, 5, 10); |
|
|
692 | evtimer_start (&t1); |
1057 | evtimer_start (&t1); |
693 | |
1058 | |
694 | struct ev_signal sig; |
1059 | struct ev_signal sig; |
695 | evw_init (&sig, scb, 65535); |
|
|
696 | evsignal_set (&sig, SIGQUIT); |
1060 | evsignal_init (&sig, scb, SIGQUIT); |
697 | evsignal_start (&sig); |
1061 | evsignal_start (&sig); |
698 | |
1062 | |
|
|
1063 | struct ev_check cw; |
|
|
1064 | evcheck_init (&cw, gcb); |
|
|
1065 | evcheck_start (&cw); |
|
|
1066 | |
|
|
1067 | struct ev_idle iw; |
|
|
1068 | evidle_init (&iw, gcb); |
|
|
1069 | evidle_start (&iw); |
|
|
1070 | |
699 | ev_loop (0); |
1071 | ev_loop (0); |
700 | |
1072 | |
701 | return 0; |
1073 | return 0; |
702 | } |
1074 | } |
703 | |
1075 | |