1 | /* |
1 | /* |
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2 | * libev event processing core, watcher management |
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3 | * |
2 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
4 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
3 | * All rights reserved. |
5 | * All rights reserved. |
4 | * |
6 | * |
5 | * Redistribution and use in source and binary forms, with or without |
7 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions are |
8 | * modification, are permitted provided that the following conditions are |
… | |
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24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
26 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
28 | * (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. |
29 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | */ |
30 | */ |
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31 | #if EV_USE_CONFIG_H |
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32 | # include "config.h" |
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33 | #endif |
29 | |
34 | |
30 | #include <math.h> |
35 | #include <math.h> |
31 | #include <stdlib.h> |
36 | #include <stdlib.h> |
32 | #include <unistd.h> |
37 | #include <unistd.h> |
33 | #include <fcntl.h> |
38 | #include <fcntl.h> |
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41 | #include <sys/types.h> |
46 | #include <sys/types.h> |
42 | #include <sys/wait.h> |
47 | #include <sys/wait.h> |
43 | #include <sys/time.h> |
48 | #include <sys/time.h> |
44 | #include <time.h> |
49 | #include <time.h> |
45 | |
50 | |
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51 | /**/ |
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52 | |
46 | #ifndef HAVE_MONOTONIC |
53 | #ifndef EV_USE_MONOTONIC |
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54 | # define EV_USE_MONOTONIC 1 |
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55 | #endif |
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56 | |
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57 | #ifndef EV_USE_SELECT |
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58 | # define EV_USE_SELECT 1 |
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59 | #endif |
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60 | |
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61 | #ifndef EV_USE_POLL |
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62 | # define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ |
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63 | #endif |
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64 | |
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65 | #ifndef EV_USE_EPOLL |
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66 | # define EV_USE_EPOLL 0 |
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67 | #endif |
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68 | |
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69 | #ifndef EV_USE_REALTIME |
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70 | # define EV_USE_REALTIME 1 |
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71 | #endif |
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72 | |
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73 | /**/ |
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74 | |
47 | # ifdef CLOCK_MONOTONIC |
75 | #ifndef CLOCK_MONOTONIC |
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76 | # undef EV_USE_MONOTONIC |
48 | # define HAVE_MONOTONIC 1 |
77 | # define EV_USE_MONOTONIC 0 |
49 | # endif |
78 | #endif |
50 | #endif |
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51 | |
79 | |
52 | #ifndef HAVE_SELECT |
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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 |
80 | #ifndef CLOCK_REALTIME |
61 | # define HAVE_REALTIME 1 /* posix requirement, but might be slower */ |
81 | # undef EV_USE_REALTIME |
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82 | # define EV_USE_REALTIME 0 |
62 | #endif |
83 | #endif |
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84 | |
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85 | /**/ |
63 | |
86 | |
64 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
87 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
65 | #define MAX_BLOCKTIME 60. |
88 | #define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ |
66 | #define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ |
89 | #define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */ |
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90 | /*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ |
67 | |
91 | |
68 | #include "ev.h" |
92 | #include "ev.h" |
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93 | |
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94 | #if __GNUC__ >= 3 |
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95 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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96 | # define inline inline |
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97 | #else |
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98 | # define expect(expr,value) (expr) |
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99 | # define inline static |
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100 | #endif |
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101 | |
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102 | #define expect_false(expr) expect ((expr) != 0, 0) |
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103 | #define expect_true(expr) expect ((expr) != 0, 1) |
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104 | |
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105 | #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) |
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106 | #define ABSPRI(w) ((w)->priority - EV_MINPRI) |
69 | |
107 | |
70 | typedef struct ev_watcher *W; |
108 | typedef struct ev_watcher *W; |
71 | typedef struct ev_watcher_list *WL; |
109 | typedef struct ev_watcher_list *WL; |
72 | typedef struct ev_watcher_time *WT; |
110 | typedef struct ev_watcher_time *WT; |
73 | |
111 | |
74 | static ev_tstamp now, diff; /* monotonic clock */ |
112 | static ev_tstamp now_floor, now, diff; /* monotonic clock */ |
75 | ev_tstamp ev_now; |
113 | ev_tstamp ev_now; |
76 | int ev_method; |
114 | int ev_method; |
77 | |
115 | |
78 | static int have_monotonic; /* runtime */ |
116 | static int have_monotonic; /* runtime */ |
79 | |
117 | |
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84 | /*****************************************************************************/ |
122 | /*****************************************************************************/ |
85 | |
123 | |
86 | ev_tstamp |
124 | ev_tstamp |
87 | ev_time (void) |
125 | ev_time (void) |
88 | { |
126 | { |
89 | #if HAVE_REALTIME |
127 | #if EV_USE_REALTIME |
90 | struct timespec ts; |
128 | struct timespec ts; |
91 | clock_gettime (CLOCK_REALTIME, &ts); |
129 | clock_gettime (CLOCK_REALTIME, &ts); |
92 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
130 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
93 | #else |
131 | #else |
94 | struct timeval tv; |
132 | struct timeval tv; |
… | |
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98 | } |
136 | } |
99 | |
137 | |
100 | static ev_tstamp |
138 | static ev_tstamp |
101 | get_clock (void) |
139 | get_clock (void) |
102 | { |
140 | { |
103 | #if HAVE_MONOTONIC |
141 | #if EV_USE_MONOTONIC |
104 | if (have_monotonic) |
142 | if (expect_true (have_monotonic)) |
105 | { |
143 | { |
106 | struct timespec ts; |
144 | struct timespec ts; |
107 | clock_gettime (CLOCK_MONOTONIC, &ts); |
145 | clock_gettime (CLOCK_MONOTONIC, &ts); |
108 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
146 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
109 | } |
147 | } |
110 | #endif |
148 | #endif |
111 | |
149 | |
112 | return ev_time (); |
150 | return ev_time (); |
113 | } |
151 | } |
114 | |
152 | |
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153 | #define array_roundsize(base,n) ((n) | 4 & ~3) |
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154 | |
115 | #define array_needsize(base,cur,cnt,init) \ |
155 | #define array_needsize(base,cur,cnt,init) \ |
116 | if ((cnt) > cur) \ |
156 | if (expect_false ((cnt) > cur)) \ |
117 | { \ |
157 | { \ |
118 | int newcnt = cur; \ |
158 | int newcnt = cur; \ |
119 | do \ |
159 | do \ |
120 | { \ |
160 | { \ |
121 | newcnt = (newcnt << 1) | 4 & ~3; \ |
161 | newcnt = array_roundsize (base, newcnt << 1); \ |
122 | } \ |
162 | } \ |
123 | while ((cnt) > newcnt); \ |
163 | while ((cnt) > newcnt); \ |
124 | \ |
164 | \ |
125 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
165 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
126 | init (base + cur, newcnt - cur); \ |
166 | init (base + cur, newcnt - cur); \ |
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130 | /*****************************************************************************/ |
170 | /*****************************************************************************/ |
131 | |
171 | |
132 | typedef struct |
172 | typedef struct |
133 | { |
173 | { |
134 | struct ev_io *head; |
174 | struct ev_io *head; |
135 | int events; |
175 | unsigned char events; |
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176 | unsigned char reify; |
136 | } ANFD; |
177 | } ANFD; |
137 | |
178 | |
138 | static ANFD *anfds; |
179 | static ANFD *anfds; |
139 | static int anfdmax; |
180 | static int anfdmax; |
140 | |
181 | |
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143 | { |
184 | { |
144 | while (count--) |
185 | while (count--) |
145 | { |
186 | { |
146 | base->head = 0; |
187 | base->head = 0; |
147 | base->events = EV_NONE; |
188 | base->events = EV_NONE; |
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189 | base->reify = 0; |
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190 | |
148 | ++base; |
191 | ++base; |
149 | } |
192 | } |
150 | } |
193 | } |
151 | |
194 | |
152 | typedef struct |
195 | typedef struct |
153 | { |
196 | { |
154 | W w; |
197 | W w; |
155 | int events; |
198 | int events; |
156 | } ANPENDING; |
199 | } ANPENDING; |
157 | |
200 | |
158 | static ANPENDING *pendings; |
201 | static ANPENDING *pendings [NUMPRI]; |
159 | static int pendingmax, pendingcnt; |
202 | static int pendingmax [NUMPRI], pendingcnt [NUMPRI]; |
160 | |
203 | |
161 | static void |
204 | static void |
162 | event (W w, int events) |
205 | event (W w, int events) |
163 | { |
206 | { |
164 | if (w->active) |
207 | if (w->pending) |
165 | { |
208 | { |
166 | w->pending = ++pendingcnt; |
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167 | array_needsize (pendings, pendingmax, pendingcnt, ); |
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168 | pendings [pendingcnt - 1].w = w; |
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169 | pendings [pendingcnt - 1].events = events; |
209 | pendings [ABSPRI (w)][w->pending - 1].events |= events; |
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210 | return; |
170 | } |
211 | } |
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212 | |
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213 | w->pending = ++pendingcnt [ABSPRI (w)]; |
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214 | array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], ); |
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215 | pendings [ABSPRI (w)][w->pending - 1].w = w; |
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216 | pendings [ABSPRI (w)][w->pending - 1].events = events; |
171 | } |
217 | } |
172 | |
218 | |
173 | static void |
219 | static void |
174 | queue_events (W *events, int eventcnt, int type) |
220 | queue_events (W *events, int eventcnt, int type) |
175 | { |
221 | { |
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213 | int events = 0; |
259 | int events = 0; |
214 | |
260 | |
215 | for (w = anfd->head; w; w = w->next) |
261 | for (w = anfd->head; w; w = w->next) |
216 | events |= w->events; |
262 | events |= w->events; |
217 | |
263 | |
218 | anfd->events &= ~EV_REIFY; |
264 | anfd->reify = 0; |
219 | |
265 | |
220 | if (anfd->events != events) |
266 | if (anfd->events != events) |
221 | { |
267 | { |
222 | method_modify (fd, anfd->events, events); |
268 | method_modify (fd, anfd->events, events); |
223 | anfd->events = events; |
269 | anfd->events = events; |
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228 | } |
274 | } |
229 | |
275 | |
230 | static void |
276 | static void |
231 | fd_change (int fd) |
277 | fd_change (int fd) |
232 | { |
278 | { |
233 | if (anfds [fd].events & EV_REIFY) |
279 | if (anfds [fd].reify || fdchangecnt < 0) |
234 | return; |
280 | return; |
235 | |
281 | |
236 | anfds [fd].events |= EV_REIFY; |
282 | anfds [fd].reify = 1; |
237 | |
283 | |
238 | ++fdchangecnt; |
284 | ++fdchangecnt; |
239 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
285 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
240 | fdchanges [fdchangecnt - 1] = fd; |
286 | fdchanges [fdchangecnt - 1] = fd; |
241 | } |
287 | } |
242 | |
288 | |
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289 | static void |
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290 | fd_kill (int fd) |
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291 | { |
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292 | struct ev_io *w; |
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293 | |
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294 | printf ("killing fd %d\n", fd);//D |
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295 | while ((w = anfds [fd].head)) |
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296 | { |
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297 | ev_io_stop (w); |
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298 | event ((W)w, EV_ERROR | EV_READ | EV_WRITE); |
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299 | } |
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300 | } |
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301 | |
243 | /* called on EBADF to verify fds */ |
302 | /* called on EBADF to verify fds */ |
244 | static void |
303 | static void |
245 | fd_recheck (void) |
304 | fd_ebadf (void) |
246 | { |
305 | { |
247 | int fd; |
306 | int fd; |
248 | |
307 | |
249 | for (fd = 0; fd < anfdmax; ++fd) |
308 | for (fd = 0; fd < anfdmax; ++fd) |
250 | if (anfds [fd].events) |
309 | if (anfds [fd].events) |
251 | if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) |
310 | if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) |
252 | while (anfds [fd].head) |
311 | fd_kill (fd); |
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312 | } |
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313 | |
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314 | /* called on ENOMEM in select/poll to kill some fds and retry */ |
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315 | static void |
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316 | fd_enomem (void) |
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317 | { |
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318 | int fd = anfdmax; |
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319 | |
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320 | while (fd--) |
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321 | if (anfds [fd].events) |
253 | { |
322 | { |
254 | event ((W)anfds [fd].head, EV_ERROR); |
323 | close (fd); |
255 | ev_io_stop (anfds [fd].head); |
324 | fd_kill (fd); |
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325 | return; |
256 | } |
326 | } |
257 | } |
327 | } |
258 | |
328 | |
259 | /*****************************************************************************/ |
329 | /*****************************************************************************/ |
260 | |
330 | |
261 | static struct ev_timer **timers; |
331 | static struct ev_timer **timers; |
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308 | /*****************************************************************************/ |
378 | /*****************************************************************************/ |
309 | |
379 | |
310 | typedef struct |
380 | typedef struct |
311 | { |
381 | { |
312 | struct ev_signal *head; |
382 | struct ev_signal *head; |
313 | sig_atomic_t gotsig; |
383 | sig_atomic_t volatile gotsig; |
314 | } ANSIG; |
384 | } ANSIG; |
315 | |
385 | |
316 | static ANSIG *signals; |
386 | static ANSIG *signals; |
317 | static int signalmax; |
387 | static int signalmax; |
318 | |
388 | |
319 | static int sigpipe [2]; |
389 | static int sigpipe [2]; |
320 | static sig_atomic_t gotsig; |
390 | static sig_atomic_t volatile gotsig; |
321 | static struct ev_io sigev; |
391 | static struct ev_io sigev; |
322 | |
392 | |
323 | static void |
393 | static void |
324 | signals_init (ANSIG *base, int count) |
394 | signals_init (ANSIG *base, int count) |
325 | { |
395 | { |
326 | while (count--) |
396 | while (count--) |
327 | { |
397 | { |
328 | base->head = 0; |
398 | base->head = 0; |
329 | base->gotsig = 0; |
399 | base->gotsig = 0; |
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400 | |
330 | ++base; |
401 | ++base; |
331 | } |
402 | } |
332 | } |
403 | } |
333 | |
404 | |
334 | static void |
405 | static void |
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337 | signals [signum - 1].gotsig = 1; |
408 | signals [signum - 1].gotsig = 1; |
338 | |
409 | |
339 | if (!gotsig) |
410 | if (!gotsig) |
340 | { |
411 | { |
341 | gotsig = 1; |
412 | gotsig = 1; |
342 | write (sigpipe [1], &gotsig, 1); |
413 | write (sigpipe [1], &signum, 1); |
343 | } |
414 | } |
344 | } |
415 | } |
345 | |
416 | |
346 | static void |
417 | static void |
347 | sigcb (struct ev_io *iow, int revents) |
418 | sigcb (struct ev_io *iow, int revents) |
348 | { |
419 | { |
349 | struct ev_signal *w; |
420 | struct ev_signal *w; |
350 | int sig; |
421 | int signum; |
351 | |
422 | |
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423 | read (sigpipe [0], &revents, 1); |
352 | gotsig = 0; |
424 | gotsig = 0; |
353 | read (sigpipe [0], &revents, 1); |
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354 | |
425 | |
355 | for (sig = signalmax; sig--; ) |
426 | for (signum = signalmax; signum--; ) |
356 | if (signals [sig].gotsig) |
427 | if (signals [signum].gotsig) |
357 | { |
428 | { |
358 | signals [sig].gotsig = 0; |
429 | signals [signum].gotsig = 0; |
359 | |
430 | |
360 | for (w = signals [sig].head; w; w = w->next) |
431 | for (w = signals [signum].head; w; w = w->next) |
361 | event ((W)w, EV_SIGNAL); |
432 | event ((W)w, EV_SIGNAL); |
362 | } |
433 | } |
363 | } |
434 | } |
364 | |
435 | |
365 | static void |
436 | static void |
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402 | struct ev_child *w; |
473 | struct ev_child *w; |
403 | int pid, status; |
474 | int pid, status; |
404 | |
475 | |
405 | while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) |
476 | while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) |
406 | for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) |
477 | for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) |
407 | if (w->pid == pid || w->pid == -1) |
478 | if (w->pid == pid || !w->pid) |
408 | { |
479 | { |
409 | w->status = status; |
480 | w->status = status; |
410 | event ((W)w, EV_CHILD); |
481 | event ((W)w, EV_CHILD); |
411 | } |
482 | } |
412 | } |
483 | } |
413 | |
484 | |
414 | /*****************************************************************************/ |
485 | /*****************************************************************************/ |
415 | |
486 | |
416 | #if HAVE_EPOLL |
487 | #if EV_USE_EPOLL |
417 | # include "ev_epoll.c" |
488 | # include "ev_epoll.c" |
418 | #endif |
489 | #endif |
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490 | #if EV_USE_POLL |
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491 | # include "ev_poll.c" |
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492 | #endif |
419 | #if HAVE_SELECT |
493 | #if EV_USE_SELECT |
420 | # include "ev_select.c" |
494 | # include "ev_select.c" |
421 | #endif |
495 | #endif |
422 | |
496 | |
423 | int |
497 | int |
424 | ev_version_major (void) |
498 | ev_version_major (void) |
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430 | ev_version_minor (void) |
504 | ev_version_minor (void) |
431 | { |
505 | { |
432 | return EV_VERSION_MINOR; |
506 | return EV_VERSION_MINOR; |
433 | } |
507 | } |
434 | |
508 | |
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509 | /* return true if we are running with elevated privileges and ignore env variables */ |
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510 | static int |
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511 | enable_secure () |
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512 | { |
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513 | return getuid () != geteuid () |
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514 | || getgid () != getegid (); |
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515 | } |
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516 | |
435 | int ev_init (int flags) |
517 | int ev_init (int methods) |
436 | { |
518 | { |
437 | if (!ev_method) |
519 | if (!ev_method) |
438 | { |
520 | { |
439 | #if HAVE_MONOTONIC |
521 | #if EV_USE_MONOTONIC |
440 | { |
522 | { |
441 | struct timespec ts; |
523 | struct timespec ts; |
442 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
524 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
443 | have_monotonic = 1; |
525 | have_monotonic = 1; |
444 | } |
526 | } |
445 | #endif |
527 | #endif |
446 | |
528 | |
447 | ev_now = ev_time (); |
529 | ev_now = ev_time (); |
448 | now = get_clock (); |
530 | now = get_clock (); |
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531 | now_floor = now; |
449 | diff = ev_now - now; |
532 | diff = ev_now - now; |
450 | |
533 | |
451 | if (pipe (sigpipe)) |
534 | if (pipe (sigpipe)) |
452 | return 0; |
535 | return 0; |
453 | |
536 | |
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537 | if (methods == EVMETHOD_AUTO) |
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538 | if (!enable_secure () && getenv ("LIBEV_METHODS")) |
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539 | methods = atoi (getenv ("LIBEV_METHODS")); |
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540 | else |
454 | ev_method = EVMETHOD_NONE; |
541 | methods = EVMETHOD_ANY; |
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542 | |
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543 | ev_method = 0; |
455 | #if HAVE_EPOLL |
544 | #if EV_USE_EPOLL |
456 | if (ev_method == EVMETHOD_NONE) epoll_init (flags); |
545 | if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods); |
457 | #endif |
546 | #endif |
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547 | #if EV_USE_POLL |
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548 | if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods); |
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549 | #endif |
458 | #if HAVE_SELECT |
550 | #if EV_USE_SELECT |
459 | if (ev_method == EVMETHOD_NONE) select_init (flags); |
551 | if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods); |
460 | #endif |
552 | #endif |
461 | |
553 | |
462 | if (ev_method) |
554 | if (ev_method) |
463 | { |
555 | { |
464 | ev_watcher_init (&sigev, sigcb); |
556 | ev_watcher_init (&sigev, sigcb); |
… | |
… | |
473 | } |
565 | } |
474 | |
566 | |
475 | /*****************************************************************************/ |
567 | /*****************************************************************************/ |
476 | |
568 | |
477 | void |
569 | void |
478 | ev_prefork (void) |
570 | ev_fork_prepare (void) |
479 | { |
571 | { |
480 | /* nop */ |
572 | /* nop */ |
481 | } |
573 | } |
482 | |
574 | |
483 | void |
575 | void |
484 | ev_postfork_parent (void) |
576 | ev_fork_parent (void) |
485 | { |
577 | { |
486 | /* nop */ |
578 | /* nop */ |
487 | } |
579 | } |
488 | |
580 | |
489 | void |
581 | void |
490 | ev_postfork_child (void) |
582 | ev_fork_child (void) |
491 | { |
583 | { |
492 | #if HAVE_EPOLL |
584 | #if EV_USE_EPOLL |
493 | if (ev_method == EVMETHOD_EPOLL) |
585 | if (ev_method == EVMETHOD_EPOLL) |
494 | epoll_postfork_child (); |
586 | epoll_postfork_child (); |
495 | #endif |
587 | #endif |
496 | |
588 | |
497 | ev_io_stop (&sigev); |
589 | ev_io_stop (&sigev); |
… | |
… | |
504 | /*****************************************************************************/ |
596 | /*****************************************************************************/ |
505 | |
597 | |
506 | static void |
598 | static void |
507 | call_pending (void) |
599 | call_pending (void) |
508 | { |
600 | { |
|
|
601 | int pri; |
|
|
602 | |
|
|
603 | for (pri = NUMPRI; pri--; ) |
509 | while (pendingcnt) |
604 | while (pendingcnt [pri]) |
510 | { |
605 | { |
511 | ANPENDING *p = pendings + --pendingcnt; |
606 | ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
512 | |
607 | |
513 | if (p->w) |
608 | if (p->w) |
514 | { |
609 | { |
515 | p->w->pending = 0; |
610 | p->w->pending = 0; |
516 | p->w->cb (p->w, p->events); |
611 | p->w->cb (p->w, p->events); |
517 | } |
612 | } |
518 | } |
613 | } |
519 | } |
614 | } |
520 | |
615 | |
521 | static void |
616 | static void |
522 | timers_reify (void) |
617 | timers_reify (void) |
523 | { |
618 | { |
524 | while (timercnt && timers [0]->at <= now) |
619 | while (timercnt && timers [0]->at <= now) |
525 | { |
620 | { |
526 | struct ev_timer *w = timers [0]; |
621 | struct ev_timer *w = timers [0]; |
527 | |
|
|
528 | event ((W)w, EV_TIMEOUT); |
|
|
529 | |
622 | |
530 | /* first reschedule or stop timer */ |
623 | /* first reschedule or stop timer */ |
531 | if (w->repeat) |
624 | if (w->repeat) |
532 | { |
625 | { |
|
|
626 | assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
533 | w->at = now + w->repeat; |
627 | w->at = now + w->repeat; |
534 | assert (("timer timeout in the past, negative repeat?", w->at > now)); |
|
|
535 | downheap ((WT *)timers, timercnt, 0); |
628 | downheap ((WT *)timers, timercnt, 0); |
536 | } |
629 | } |
537 | else |
630 | else |
538 | ev_timer_stop (w); /* nonrepeating: stop timer */ |
631 | ev_timer_stop (w); /* nonrepeating: stop timer */ |
|
|
632 | |
|
|
633 | event ((W)w, EV_TIMEOUT); |
539 | } |
634 | } |
540 | } |
635 | } |
541 | |
636 | |
542 | static void |
637 | static void |
543 | periodics_reify (void) |
638 | periodics_reify (void) |
… | |
… | |
548 | |
643 | |
549 | /* first reschedule or stop timer */ |
644 | /* first reschedule or stop timer */ |
550 | if (w->interval) |
645 | if (w->interval) |
551 | { |
646 | { |
552 | w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; |
647 | w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; |
553 | assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); |
648 | assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); |
554 | downheap ((WT *)periodics, periodiccnt, 0); |
649 | downheap ((WT *)periodics, periodiccnt, 0); |
555 | } |
650 | } |
556 | else |
651 | else |
557 | ev_periodic_stop (w); /* nonrepeating: stop timer */ |
652 | ev_periodic_stop (w); /* nonrepeating: stop timer */ |
558 | |
653 | |
559 | event ((W)w, EV_TIMEOUT); |
654 | event ((W)w, EV_PERIODIC); |
560 | } |
655 | } |
561 | } |
656 | } |
562 | |
657 | |
563 | static void |
658 | static void |
564 | periodics_reschedule (ev_tstamp diff) |
659 | periodics_reschedule (ev_tstamp diff) |
… | |
… | |
583 | } |
678 | } |
584 | } |
679 | } |
585 | } |
680 | } |
586 | } |
681 | } |
587 | |
682 | |
|
|
683 | static int |
|
|
684 | time_update_monotonic (void) |
|
|
685 | { |
|
|
686 | now = get_clock (); |
|
|
687 | |
|
|
688 | if (expect_true (now - now_floor < MIN_TIMEJUMP * .5)) |
|
|
689 | { |
|
|
690 | ev_now = now + diff; |
|
|
691 | return 0; |
|
|
692 | } |
|
|
693 | else |
|
|
694 | { |
|
|
695 | now_floor = now; |
|
|
696 | ev_now = ev_time (); |
|
|
697 | return 1; |
|
|
698 | } |
|
|
699 | } |
|
|
700 | |
588 | static void |
701 | static void |
589 | time_update (void) |
702 | time_update (void) |
590 | { |
703 | { |
591 | int i; |
704 | int i; |
592 | |
705 | |
593 | ev_now = ev_time (); |
706 | #if EV_USE_MONOTONIC |
594 | |
|
|
595 | if (have_monotonic) |
707 | if (expect_true (have_monotonic)) |
596 | { |
708 | { |
|
|
709 | if (time_update_monotonic ()) |
|
|
710 | { |
597 | ev_tstamp odiff = diff; |
711 | ev_tstamp odiff = diff; |
598 | |
712 | |
599 | for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
713 | for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
600 | { |
714 | { |
601 | now = get_clock (); |
|
|
602 | diff = ev_now - now; |
715 | diff = ev_now - now; |
603 | |
716 | |
604 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
717 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
605 | return; /* all is well */ |
718 | return; /* all is well */ |
606 | |
719 | |
607 | ev_now = ev_time (); |
720 | ev_now = ev_time (); |
|
|
721 | now = get_clock (); |
|
|
722 | now_floor = now; |
608 | } |
723 | } |
609 | |
724 | |
610 | periodics_reschedule (diff - odiff); |
725 | periodics_reschedule (diff - odiff); |
611 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
726 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
|
|
727 | } |
612 | } |
728 | } |
613 | else |
729 | else |
|
|
730 | #endif |
614 | { |
731 | { |
|
|
732 | ev_now = ev_time (); |
|
|
733 | |
615 | if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) |
734 | if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) |
616 | { |
735 | { |
617 | periodics_reschedule (ev_now - now); |
736 | periodics_reschedule (ev_now - now); |
618 | |
737 | |
619 | /* adjust timers. this is easy, as the offset is the same for all */ |
738 | /* adjust timers. this is easy, as the offset is the same for all */ |
620 | for (i = 0; i < timercnt; ++i) |
739 | for (i = 0; i < timercnt; ++i) |
… | |
… | |
633 | ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; |
752 | ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; |
634 | |
753 | |
635 | do |
754 | do |
636 | { |
755 | { |
637 | /* queue check watchers (and execute them) */ |
756 | /* queue check watchers (and execute them) */ |
638 | if (preparecnt) |
757 | if (expect_false (preparecnt)) |
639 | { |
758 | { |
640 | queue_events ((W *)prepares, preparecnt, EV_PREPARE); |
759 | queue_events ((W *)prepares, preparecnt, EV_PREPARE); |
641 | call_pending (); |
760 | call_pending (); |
642 | } |
761 | } |
643 | |
762 | |
… | |
… | |
646 | |
765 | |
647 | /* calculate blocking time */ |
766 | /* calculate blocking time */ |
648 | |
767 | |
649 | /* we only need this for !monotonic clockor timers, but as we basically |
768 | /* we only need this for !monotonic clockor timers, but as we basically |
650 | always have timers, we just calculate it always */ |
769 | always have timers, we just calculate it always */ |
|
|
770 | #if EV_USE_MONOTONIC |
|
|
771 | if (expect_true (have_monotonic)) |
|
|
772 | time_update_monotonic (); |
|
|
773 | else |
|
|
774 | #endif |
|
|
775 | { |
651 | ev_now = ev_time (); |
776 | ev_now = ev_time (); |
|
|
777 | now = ev_now; |
|
|
778 | } |
652 | |
779 | |
653 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
780 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
654 | block = 0.; |
781 | block = 0.; |
655 | else |
782 | else |
656 | { |
783 | { |
657 | block = MAX_BLOCKTIME; |
784 | block = MAX_BLOCKTIME; |
658 | |
785 | |
659 | if (timercnt) |
786 | if (timercnt) |
660 | { |
787 | { |
661 | ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; |
788 | ev_tstamp to = timers [0]->at - now + method_fudge; |
662 | if (block > to) block = to; |
789 | if (block > to) block = to; |
663 | } |
790 | } |
664 | |
791 | |
665 | if (periodiccnt) |
792 | if (periodiccnt) |
666 | { |
793 | { |
… | |
… | |
719 | head = &(*head)->next; |
846 | head = &(*head)->next; |
720 | } |
847 | } |
721 | } |
848 | } |
722 | |
849 | |
723 | static void |
850 | static void |
724 | ev_clear (W w) |
851 | ev_clear_pending (W w) |
725 | { |
852 | { |
726 | if (w->pending) |
853 | if (w->pending) |
727 | { |
854 | { |
728 | pendings [w->pending - 1].w = 0; |
855 | pendings [ABSPRI (w)][w->pending - 1].w = 0; |
729 | w->pending = 0; |
856 | w->pending = 0; |
730 | } |
857 | } |
731 | } |
858 | } |
732 | |
859 | |
733 | static void |
860 | static void |
734 | ev_start (W w, int active) |
861 | ev_start (W w, int active) |
735 | { |
862 | { |
|
|
863 | if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; |
|
|
864 | if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI; |
|
|
865 | |
736 | w->active = active; |
866 | w->active = active; |
737 | } |
867 | } |
738 | |
868 | |
739 | static void |
869 | static void |
740 | ev_stop (W w) |
870 | ev_stop (W w) |
… | |
… | |
745 | /*****************************************************************************/ |
875 | /*****************************************************************************/ |
746 | |
876 | |
747 | void |
877 | void |
748 | ev_io_start (struct ev_io *w) |
878 | ev_io_start (struct ev_io *w) |
749 | { |
879 | { |
|
|
880 | int fd = w->fd; |
|
|
881 | |
750 | if (ev_is_active (w)) |
882 | if (ev_is_active (w)) |
751 | return; |
883 | return; |
752 | |
884 | |
753 | int fd = w->fd; |
885 | assert (("ev_io_start called with negative fd", fd >= 0)); |
754 | |
886 | |
755 | ev_start ((W)w, 1); |
887 | ev_start ((W)w, 1); |
756 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
888 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
757 | wlist_add ((WL *)&anfds[fd].head, (WL)w); |
889 | wlist_add ((WL *)&anfds[fd].head, (WL)w); |
758 | |
890 | |
… | |
… | |
760 | } |
892 | } |
761 | |
893 | |
762 | void |
894 | void |
763 | ev_io_stop (struct ev_io *w) |
895 | ev_io_stop (struct ev_io *w) |
764 | { |
896 | { |
765 | ev_clear ((W)w); |
897 | ev_clear_pending ((W)w); |
766 | if (!ev_is_active (w)) |
898 | if (!ev_is_active (w)) |
767 | return; |
899 | return; |
768 | |
900 | |
769 | wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
901 | wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
770 | ev_stop ((W)w); |
902 | ev_stop ((W)w); |
… | |
… | |
778 | if (ev_is_active (w)) |
910 | if (ev_is_active (w)) |
779 | return; |
911 | return; |
780 | |
912 | |
781 | w->at += now; |
913 | w->at += now; |
782 | |
914 | |
783 | assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); |
915 | assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
784 | |
916 | |
785 | ev_start ((W)w, ++timercnt); |
917 | ev_start ((W)w, ++timercnt); |
786 | array_needsize (timers, timermax, timercnt, ); |
918 | array_needsize (timers, timermax, timercnt, ); |
787 | timers [timercnt - 1] = w; |
919 | timers [timercnt - 1] = w; |
788 | upheap ((WT *)timers, timercnt - 1); |
920 | upheap ((WT *)timers, timercnt - 1); |
789 | } |
921 | } |
790 | |
922 | |
791 | void |
923 | void |
792 | ev_timer_stop (struct ev_timer *w) |
924 | ev_timer_stop (struct ev_timer *w) |
793 | { |
925 | { |
794 | ev_clear ((W)w); |
926 | ev_clear_pending ((W)w); |
795 | if (!ev_is_active (w)) |
927 | if (!ev_is_active (w)) |
796 | return; |
928 | return; |
797 | |
929 | |
798 | if (w->active < timercnt--) |
930 | if (w->active < timercnt--) |
799 | { |
931 | { |
… | |
… | |
827 | ev_periodic_start (struct ev_periodic *w) |
959 | ev_periodic_start (struct ev_periodic *w) |
828 | { |
960 | { |
829 | if (ev_is_active (w)) |
961 | if (ev_is_active (w)) |
830 | return; |
962 | return; |
831 | |
963 | |
832 | assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); |
964 | assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); |
833 | |
965 | |
834 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
966 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
835 | if (w->interval) |
967 | if (w->interval) |
836 | w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; |
968 | w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; |
837 | |
969 | |
… | |
… | |
842 | } |
974 | } |
843 | |
975 | |
844 | void |
976 | void |
845 | ev_periodic_stop (struct ev_periodic *w) |
977 | ev_periodic_stop (struct ev_periodic *w) |
846 | { |
978 | { |
847 | ev_clear ((W)w); |
979 | ev_clear_pending ((W)w); |
848 | if (!ev_is_active (w)) |
980 | if (!ev_is_active (w)) |
849 | return; |
981 | return; |
850 | |
982 | |
851 | if (w->active < periodiccnt--) |
983 | if (w->active < periodiccnt--) |
852 | { |
984 | { |
… | |
… | |
860 | void |
992 | void |
861 | ev_signal_start (struct ev_signal *w) |
993 | ev_signal_start (struct ev_signal *w) |
862 | { |
994 | { |
863 | if (ev_is_active (w)) |
995 | if (ev_is_active (w)) |
864 | return; |
996 | return; |
|
|
997 | |
|
|
998 | assert (("ev_signal_start called with illegal signal number", w->signum > 0)); |
865 | |
999 | |
866 | ev_start ((W)w, 1); |
1000 | ev_start ((W)w, 1); |
867 | array_needsize (signals, signalmax, w->signum, signals_init); |
1001 | array_needsize (signals, signalmax, w->signum, signals_init); |
868 | wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
1002 | wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
869 | |
1003 | |
… | |
… | |
878 | } |
1012 | } |
879 | |
1013 | |
880 | void |
1014 | void |
881 | ev_signal_stop (struct ev_signal *w) |
1015 | ev_signal_stop (struct ev_signal *w) |
882 | { |
1016 | { |
883 | ev_clear ((W)w); |
1017 | ev_clear_pending ((W)w); |
884 | if (!ev_is_active (w)) |
1018 | if (!ev_is_active (w)) |
885 | return; |
1019 | return; |
886 | |
1020 | |
887 | wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
1021 | wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
888 | ev_stop ((W)w); |
1022 | ev_stop ((W)w); |
… | |
… | |
903 | } |
1037 | } |
904 | |
1038 | |
905 | void |
1039 | void |
906 | ev_idle_stop (struct ev_idle *w) |
1040 | ev_idle_stop (struct ev_idle *w) |
907 | { |
1041 | { |
908 | ev_clear ((W)w); |
1042 | ev_clear_pending ((W)w); |
909 | if (ev_is_active (w)) |
1043 | if (ev_is_active (w)) |
910 | return; |
1044 | return; |
911 | |
1045 | |
912 | idles [w->active - 1] = idles [--idlecnt]; |
1046 | idles [w->active - 1] = idles [--idlecnt]; |
913 | ev_stop ((W)w); |
1047 | ev_stop ((W)w); |
… | |
… | |
925 | } |
1059 | } |
926 | |
1060 | |
927 | void |
1061 | void |
928 | ev_prepare_stop (struct ev_prepare *w) |
1062 | ev_prepare_stop (struct ev_prepare *w) |
929 | { |
1063 | { |
930 | ev_clear ((W)w); |
1064 | ev_clear_pending ((W)w); |
931 | if (ev_is_active (w)) |
1065 | if (ev_is_active (w)) |
932 | return; |
1066 | return; |
933 | |
1067 | |
934 | prepares [w->active - 1] = prepares [--preparecnt]; |
1068 | prepares [w->active - 1] = prepares [--preparecnt]; |
935 | ev_stop ((W)w); |
1069 | ev_stop ((W)w); |
… | |
… | |
947 | } |
1081 | } |
948 | |
1082 | |
949 | void |
1083 | void |
950 | ev_check_stop (struct ev_check *w) |
1084 | ev_check_stop (struct ev_check *w) |
951 | { |
1085 | { |
952 | ev_clear ((W)w); |
1086 | ev_clear_pending ((W)w); |
953 | if (ev_is_active (w)) |
1087 | if (ev_is_active (w)) |
954 | return; |
1088 | return; |
955 | |
1089 | |
956 | checks [w->active - 1] = checks [--checkcnt]; |
1090 | checks [w->active - 1] = checks [--checkcnt]; |
957 | ev_stop ((W)w); |
1091 | ev_stop ((W)w); |
… | |
… | |
968 | } |
1102 | } |
969 | |
1103 | |
970 | void |
1104 | void |
971 | ev_child_stop (struct ev_child *w) |
1105 | ev_child_stop (struct ev_child *w) |
972 | { |
1106 | { |
973 | ev_clear ((W)w); |
1107 | ev_clear_pending ((W)w); |
974 | if (ev_is_active (w)) |
1108 | if (ev_is_active (w)) |
975 | return; |
1109 | return; |
976 | |
1110 | |
977 | wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
1111 | wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
978 | ev_stop ((W)w); |
1112 | ev_stop ((W)w); |
… | |
… | |
1017 | ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
1151 | ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
1018 | { |
1152 | { |
1019 | struct ev_once *once = malloc (sizeof (struct ev_once)); |
1153 | struct ev_once *once = malloc (sizeof (struct ev_once)); |
1020 | |
1154 | |
1021 | if (!once) |
1155 | if (!once) |
1022 | cb (EV_ERROR, arg); |
1156 | cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
1023 | else |
1157 | else |
1024 | { |
1158 | { |
1025 | once->cb = cb; |
1159 | once->cb = cb; |
1026 | once->arg = arg; |
1160 | once->arg = arg; |
1027 | |
1161 | |
1028 | ev_watcher_init (&once->io, once_cb_io); |
1162 | ev_watcher_init (&once->io, once_cb_io); |
1029 | |
|
|
1030 | if (fd >= 0) |
1163 | if (fd >= 0) |
1031 | { |
1164 | { |
1032 | ev_io_set (&once->io, fd, events); |
1165 | ev_io_set (&once->io, fd, events); |
1033 | ev_io_start (&once->io); |
1166 | ev_io_start (&once->io); |
1034 | } |
1167 | } |
1035 | |
1168 | |
1036 | ev_watcher_init (&once->to, once_cb_to); |
1169 | ev_watcher_init (&once->to, once_cb_to); |
1037 | |
|
|
1038 | if (timeout >= 0.) |
1170 | if (timeout >= 0.) |
1039 | { |
1171 | { |
1040 | ev_timer_set (&once->to, timeout, 0.); |
1172 | ev_timer_set (&once->to, timeout, 0.); |
1041 | ev_timer_start (&once->to); |
1173 | ev_timer_start (&once->to); |
1042 | } |
1174 | } |