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1 | /* |
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2 | * libev event processing core, watcher management |
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3 | * |
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4 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
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5 | * All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions are |
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9 | * met: |
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10 | * |
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11 | * * Redistributions of source code must retain the above copyright |
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12 | * notice, this list of conditions and the following disclaimer. |
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13 | * |
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14 | * * Redistributions in binary form must reproduce the above |
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15 | * copyright notice, this list of conditions and the following |
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16 | * disclaimer in the documentation and/or other materials provided |
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17 | * with the distribution. |
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18 | * |
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19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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20 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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21 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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22 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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23 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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24 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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25 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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26 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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27 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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28 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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29 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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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 |
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34 | |
1 | #include <math.h> |
35 | #include <math.h> |
2 | #include <stdlib.h> |
36 | #include <stdlib.h> |
3 | #include <unistd.h> |
37 | #include <unistd.h> |
4 | #include <fcntl.h> |
38 | #include <fcntl.h> |
5 | #include <signal.h> |
39 | #include <signal.h> |
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40 | #include <stddef.h> |
6 | |
41 | |
7 | #include <stdio.h> |
42 | #include <stdio.h> |
8 | |
43 | |
9 | #include <assert.h> |
44 | #include <assert.h> |
10 | #include <errno.h> |
45 | #include <errno.h> |
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46 | #include <sys/types.h> |
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47 | #ifndef WIN32 |
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48 | # include <sys/wait.h> |
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49 | #endif |
11 | #include <sys/time.h> |
50 | #include <sys/time.h> |
12 | #include <time.h> |
51 | #include <time.h> |
13 | |
52 | |
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53 | /**/ |
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54 | |
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55 | #ifndef EV_USE_MONOTONIC |
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56 | # define EV_USE_MONOTONIC 1 |
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57 | #endif |
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58 | |
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59 | #ifndef EV_USE_SELECT |
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60 | # define EV_USE_SELECT 1 |
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61 | #endif |
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62 | |
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63 | #ifndef EV_USE_POLL |
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64 | # define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ |
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65 | #endif |
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66 | |
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67 | #ifndef EV_USE_EPOLL |
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68 | # define EV_USE_EPOLL 0 |
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69 | #endif |
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70 | |
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71 | #ifndef EV_USE_KQUEUE |
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72 | # define EV_USE_KQUEUE 0 |
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73 | #endif |
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74 | |
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75 | #ifndef EV_USE_REALTIME |
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76 | # define EV_USE_REALTIME 1 |
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77 | #endif |
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78 | |
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79 | /**/ |
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80 | |
14 | #ifdef CLOCK_MONOTONIC |
81 | #ifndef CLOCK_MONOTONIC |
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82 | # undef EV_USE_MONOTONIC |
15 | # define HAVE_MONOTONIC 1 |
83 | # define EV_USE_MONOTONIC 0 |
16 | #endif |
84 | #endif |
17 | |
85 | |
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86 | #ifndef CLOCK_REALTIME |
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87 | # undef EV_USE_REALTIME |
18 | #define HAVE_REALTIME 1 |
88 | # define EV_USE_REALTIME 0 |
19 | #define HAVE_EPOLL 1 |
89 | #endif |
20 | #define HAVE_SELECT 1 |
90 | |
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91 | /**/ |
21 | |
92 | |
22 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
93 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
23 | #define MAX_BLOCKTIME 60. |
94 | #define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ |
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95 | #define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */ |
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96 | /*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ |
24 | |
97 | |
25 | #include "ev.h" |
98 | #include "ev.h" |
26 | |
99 | |
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100 | #if __GNUC__ >= 3 |
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101 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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102 | # define inline inline |
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103 | #else |
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104 | # define expect(expr,value) (expr) |
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105 | # define inline static |
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106 | #endif |
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107 | |
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108 | #define expect_false(expr) expect ((expr) != 0, 0) |
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109 | #define expect_true(expr) expect ((expr) != 0, 1) |
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110 | |
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111 | #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) |
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112 | #define ABSPRI(w) ((w)->priority - EV_MINPRI) |
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113 | |
27 | struct ev_watcher { |
114 | 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 { |
115 | typedef struct ev_watcher_list *WL; |
32 | EV_WATCHER_LIST (ev_watcher_list); |
116 | typedef struct ev_watcher_time *WT; |
33 | }; |
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34 | |
117 | |
35 | static ev_tstamp now, diff; /* monotonic clock */ |
118 | static ev_tstamp now_floor, now, diff; /* monotonic clock */ |
36 | ev_tstamp ev_now; |
119 | ev_tstamp ev_now; |
37 | int ev_method; |
120 | int ev_method; |
38 | |
121 | |
39 | static int have_monotonic; /* runtime */ |
122 | static int have_monotonic; /* runtime */ |
40 | |
123 | |
41 | static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ |
124 | static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ |
42 | static void (*method_modify)(int fd, int oev, int nev); |
125 | static void (*method_modify)(int fd, int oev, int nev); |
43 | static void (*method_poll)(ev_tstamp timeout); |
126 | static void (*method_poll)(ev_tstamp timeout); |
44 | |
127 | |
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128 | /*****************************************************************************/ |
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129 | |
45 | ev_tstamp |
130 | ev_tstamp |
46 | ev_time (void) |
131 | ev_time (void) |
47 | { |
132 | { |
48 | #if HAVE_REALTIME |
133 | #if EV_USE_REALTIME |
49 | struct timespec ts; |
134 | struct timespec ts; |
50 | clock_gettime (CLOCK_REALTIME, &ts); |
135 | clock_gettime (CLOCK_REALTIME, &ts); |
51 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
136 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
52 | #else |
137 | #else |
53 | struct timeval tv; |
138 | struct timeval tv; |
… | |
… | |
57 | } |
142 | } |
58 | |
143 | |
59 | static ev_tstamp |
144 | static ev_tstamp |
60 | get_clock (void) |
145 | get_clock (void) |
61 | { |
146 | { |
62 | #if HAVE_MONOTONIC |
147 | #if EV_USE_MONOTONIC |
63 | if (have_monotonic) |
148 | if (expect_true (have_monotonic)) |
64 | { |
149 | { |
65 | struct timespec ts; |
150 | struct timespec ts; |
66 | clock_gettime (CLOCK_MONOTONIC, &ts); |
151 | clock_gettime (CLOCK_MONOTONIC, &ts); |
67 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
152 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
68 | } |
153 | } |
69 | #endif |
154 | #endif |
70 | |
155 | |
71 | return ev_time (); |
156 | return ev_time (); |
72 | } |
157 | } |
73 | |
158 | |
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159 | #define array_roundsize(base,n) ((n) | 4 & ~3) |
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160 | |
74 | #define array_needsize(base,cur,cnt,init) \ |
161 | #define array_needsize(base,cur,cnt,init) \ |
75 | if ((cnt) > cur) \ |
162 | if (expect_false ((cnt) > cur)) \ |
76 | { \ |
163 | { \ |
77 | int newcnt = cur ? cur << 1 : 16; \ |
164 | int newcnt = cur; \ |
78 | fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ |
165 | do \ |
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166 | { \ |
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167 | newcnt = array_roundsize (base, newcnt << 1); \ |
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168 | } \ |
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169 | while ((cnt) > newcnt); \ |
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170 | \ |
79 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
171 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
80 | init (base + cur, newcnt - cur); \ |
172 | init (base + cur, newcnt - cur); \ |
81 | cur = newcnt; \ |
173 | cur = newcnt; \ |
82 | } |
174 | } |
83 | |
175 | |
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176 | /*****************************************************************************/ |
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177 | |
84 | typedef struct |
178 | typedef struct |
85 | { |
179 | { |
86 | struct ev_io *head; |
180 | struct ev_io *head; |
87 | unsigned char wev, rev; /* want, received event set */ |
181 | unsigned char events; |
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182 | unsigned char reify; |
88 | } ANFD; |
183 | } ANFD; |
89 | |
184 | |
90 | static ANFD *anfds; |
185 | static ANFD *anfds; |
91 | static int anfdmax; |
186 | static int anfdmax; |
92 | |
187 | |
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188 | static void |
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189 | anfds_init (ANFD *base, int count) |
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190 | { |
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191 | while (count--) |
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192 | { |
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193 | base->head = 0; |
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194 | base->events = EV_NONE; |
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195 | base->reify = 0; |
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196 | |
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197 | ++base; |
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198 | } |
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199 | } |
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200 | |
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201 | typedef struct |
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202 | { |
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203 | W w; |
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204 | int events; |
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205 | } ANPENDING; |
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206 | |
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207 | static ANPENDING *pendings [NUMPRI]; |
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208 | static int pendingmax [NUMPRI], pendingcnt [NUMPRI]; |
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209 | |
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210 | static void |
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211 | event (W w, int events) |
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212 | { |
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213 | if (w->pending) |
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214 | { |
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215 | pendings [ABSPRI (w)][w->pending - 1].events |= events; |
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216 | return; |
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217 | } |
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218 | |
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219 | w->pending = ++pendingcnt [ABSPRI (w)]; |
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220 | array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], ); |
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221 | pendings [ABSPRI (w)][w->pending - 1].w = w; |
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222 | pendings [ABSPRI (w)][w->pending - 1].events = events; |
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223 | } |
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224 | |
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225 | static void |
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226 | queue_events (W *events, int eventcnt, int type) |
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227 | { |
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228 | int i; |
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229 | |
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230 | for (i = 0; i < eventcnt; ++i) |
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231 | event (events [i], type); |
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232 | } |
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233 | |
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234 | static void |
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235 | fd_event (int fd, int events) |
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236 | { |
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237 | ANFD *anfd = anfds + fd; |
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238 | struct ev_io *w; |
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239 | |
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240 | for (w = anfd->head; w; w = w->next) |
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241 | { |
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242 | int ev = w->events & events; |
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243 | |
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244 | if (ev) |
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245 | event ((W)w, ev); |
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246 | } |
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247 | } |
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248 | |
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249 | /*****************************************************************************/ |
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250 | |
93 | static int *fdchanges; |
251 | static int *fdchanges; |
94 | static int fdchangemax, fdchangecnt; |
252 | static int fdchangemax, fdchangecnt; |
95 | |
253 | |
96 | static void |
254 | static void |
97 | anfds_init (ANFD *base, int count) |
255 | fd_reify (void) |
98 | { |
256 | { |
99 | while (count--) |
257 | int i; |
100 | { |
258 | |
101 | base->head = 0; |
259 | for (i = 0; i < fdchangecnt; ++i) |
102 | base->wev = base->rev = EV_NONE; |
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103 | ++base; |
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104 | } |
260 | { |
105 | } |
261 | int fd = fdchanges [i]; |
106 | |
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107 | typedef struct |
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108 | { |
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109 | struct ev_watcher *w; |
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110 | int events; |
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111 | } ANPENDING; |
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112 | |
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113 | static ANPENDING *pendings; |
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114 | static int pendingmax, pendingcnt; |
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115 | |
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116 | static void |
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117 | event (struct ev_watcher *w, int events) |
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118 | { |
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119 | w->pending = ++pendingcnt; |
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120 | array_needsize (pendings, pendingmax, pendingcnt, ); |
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121 | pendings [pendingcnt - 1].w = w; |
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122 | pendings [pendingcnt - 1].events = events; |
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123 | } |
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124 | |
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125 | static void |
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126 | fd_event (int fd, int events) |
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127 | { |
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128 | ANFD *anfd = anfds + fd; |
262 | ANFD *anfd = anfds + fd; |
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263 | struct ev_io *w; |
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264 | |
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265 | int events = 0; |
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266 | |
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267 | for (w = anfd->head; w; w = w->next) |
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268 | events |= w->events; |
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269 | |
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270 | anfd->reify = 0; |
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271 | |
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272 | if (anfd->events != events) |
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273 | { |
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274 | method_modify (fd, anfd->events, events); |
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275 | anfd->events = events; |
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276 | } |
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277 | } |
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278 | |
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279 | fdchangecnt = 0; |
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280 | } |
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281 | |
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282 | static void |
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283 | fd_change (int fd) |
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284 | { |
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285 | if (anfds [fd].reify || fdchangecnt < 0) |
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286 | return; |
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287 | |
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288 | anfds [fd].reify = 1; |
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289 | |
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290 | ++fdchangecnt; |
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291 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
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292 | fdchanges [fdchangecnt - 1] = fd; |
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293 | } |
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294 | |
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295 | static void |
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296 | fd_kill (int fd) |
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297 | { |
129 | struct ev_io *w; |
298 | struct ev_io *w; |
130 | |
299 | |
131 | for (w = anfd->head; w; w = w->next) |
300 | printf ("killing fd %d\n", fd);//D |
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301 | while ((w = anfds [fd].head)) |
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302 | { |
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303 | ev_io_stop (w); |
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304 | event ((W)w, EV_ERROR | EV_READ | EV_WRITE); |
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305 | } |
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306 | } |
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307 | |
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308 | /* called on EBADF to verify fds */ |
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309 | static void |
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310 | fd_ebadf (void) |
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311 | { |
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312 | int fd; |
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313 | |
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314 | for (fd = 0; fd < anfdmax; ++fd) |
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315 | if (anfds [fd].events) |
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316 | if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) |
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317 | fd_kill (fd); |
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318 | } |
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319 | |
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320 | /* called on ENOMEM in select/poll to kill some fds and retry */ |
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321 | static void |
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322 | fd_enomem (void) |
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323 | { |
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324 | int fd = anfdmax; |
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325 | |
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326 | while (fd--) |
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327 | if (anfds [fd].events) |
132 | { |
328 | { |
133 | int ev = w->events & events; |
329 | close (fd); |
134 | |
330 | fd_kill (fd); |
135 | if (ev) |
331 | return; |
136 | event ((struct ev_watcher *)w, ev); |
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137 | } |
332 | } |
138 | } |
333 | } |
139 | |
334 | |
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335 | /*****************************************************************************/ |
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336 | |
140 | static struct ev_timer **atimers; |
337 | static struct ev_timer **timers; |
141 | static int atimermax, atimercnt; |
338 | static int timermax, timercnt; |
142 | |
339 | |
143 | static struct ev_timer **rtimers; |
340 | static struct ev_periodic **periodics; |
144 | static int rtimermax, rtimercnt; |
341 | static int periodicmax, periodiccnt; |
145 | |
342 | |
146 | static void |
343 | static void |
147 | upheap (struct ev_timer **timers, int k) |
344 | upheap (WT *timers, int k) |
148 | { |
345 | { |
149 | struct ev_timer *w = timers [k]; |
346 | WT w = timers [k]; |
150 | |
347 | |
151 | while (k && timers [k >> 1]->at > w->at) |
348 | while (k && timers [k >> 1]->at > w->at) |
152 | { |
349 | { |
153 | timers [k] = timers [k >> 1]; |
350 | timers [k] = timers [k >> 1]; |
154 | timers [k]->active = k + 1; |
351 | timers [k]->active = k + 1; |
… | |
… | |
159 | timers [k]->active = k + 1; |
356 | timers [k]->active = k + 1; |
160 | |
357 | |
161 | } |
358 | } |
162 | |
359 | |
163 | static void |
360 | static void |
164 | downheap (struct ev_timer **timers, int N, int k) |
361 | downheap (WT *timers, int N, int k) |
165 | { |
362 | { |
166 | struct ev_timer *w = timers [k]; |
363 | WT w = timers [k]; |
167 | |
364 | |
168 | while (k < (N >> 1)) |
365 | while (k < (N >> 1)) |
169 | { |
366 | { |
170 | int j = k << 1; |
367 | int j = k << 1; |
171 | |
368 | |
… | |
… | |
182 | |
379 | |
183 | timers [k] = w; |
380 | timers [k] = w; |
184 | timers [k]->active = k + 1; |
381 | timers [k]->active = k + 1; |
185 | } |
382 | } |
186 | |
383 | |
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384 | /*****************************************************************************/ |
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385 | |
187 | typedef struct |
386 | typedef struct |
188 | { |
387 | { |
189 | struct ev_signal *head; |
388 | struct ev_signal *head; |
190 | sig_atomic_t gotsig; |
389 | sig_atomic_t volatile gotsig; |
191 | } ANSIG; |
390 | } ANSIG; |
192 | |
391 | |
193 | static ANSIG *signals; |
392 | static ANSIG *signals; |
194 | static int signalmax; |
393 | static int signalmax; |
195 | |
394 | |
196 | static int sigpipe [2]; |
395 | static int sigpipe [2]; |
197 | static sig_atomic_t gotsig; |
396 | static sig_atomic_t volatile gotsig; |
198 | static struct ev_io sigev; |
397 | static struct ev_io sigev; |
199 | |
398 | |
200 | static void |
399 | static void |
201 | signals_init (ANSIG *base, int count) |
400 | signals_init (ANSIG *base, int count) |
202 | { |
401 | { |
203 | while (count--) |
402 | while (count--) |
204 | { |
403 | { |
205 | base->head = 0; |
404 | base->head = 0; |
206 | base->gotsig = 0; |
405 | base->gotsig = 0; |
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406 | |
207 | ++base; |
407 | ++base; |
208 | } |
408 | } |
209 | } |
409 | } |
210 | |
410 | |
211 | static void |
411 | static void |
… | |
… | |
214 | signals [signum - 1].gotsig = 1; |
414 | signals [signum - 1].gotsig = 1; |
215 | |
415 | |
216 | if (!gotsig) |
416 | if (!gotsig) |
217 | { |
417 | { |
218 | gotsig = 1; |
418 | gotsig = 1; |
219 | write (sigpipe [1], &gotsig, 1); |
419 | write (sigpipe [1], &signum, 1); |
220 | } |
420 | } |
221 | } |
421 | } |
222 | |
422 | |
223 | static void |
423 | static void |
224 | sigcb (struct ev_io *iow, int revents) |
424 | sigcb (struct ev_io *iow, int revents) |
225 | { |
425 | { |
226 | struct ev_signal *w; |
426 | struct ev_signal *w; |
227 | int sig; |
427 | int signum; |
228 | |
428 | |
|
|
429 | read (sigpipe [0], &revents, 1); |
229 | gotsig = 0; |
430 | gotsig = 0; |
230 | read (sigpipe [0], &revents, 1); |
|
|
231 | |
431 | |
232 | for (sig = signalmax; sig--; ) |
432 | for (signum = signalmax; signum--; ) |
233 | if (signals [sig].gotsig) |
433 | if (signals [signum].gotsig) |
234 | { |
434 | { |
235 | signals [sig].gotsig = 0; |
435 | signals [signum].gotsig = 0; |
236 | |
436 | |
237 | for (w = signals [sig].head; w; w = w->next) |
437 | for (w = signals [signum].head; w; w = w->next) |
238 | event ((struct ev_watcher *)w, EV_SIGNAL); |
438 | event ((W)w, EV_SIGNAL); |
239 | } |
439 | } |
240 | } |
440 | } |
241 | |
441 | |
242 | static void |
442 | static void |
243 | siginit (void) |
443 | siginit (void) |
244 | { |
444 | { |
|
|
445 | #ifndef WIN32 |
245 | fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); |
446 | fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); |
246 | fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC); |
447 | fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC); |
247 | |
448 | |
248 | /* rather than sort out wether we really need nb, set it */ |
449 | /* rather than sort out wether we really need nb, set it */ |
249 | fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); |
450 | fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); |
250 | fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); |
451 | fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); |
|
|
452 | #endif |
251 | |
453 | |
252 | evio_set (&sigev, sigpipe [0], EV_READ); |
454 | ev_io_set (&sigev, sigpipe [0], EV_READ); |
253 | evio_start (&sigev); |
455 | ev_io_start (&sigev); |
254 | } |
456 | } |
255 | |
457 | |
|
|
458 | /*****************************************************************************/ |
|
|
459 | |
|
|
460 | static struct ev_idle **idles; |
|
|
461 | static int idlemax, idlecnt; |
|
|
462 | |
|
|
463 | static struct ev_prepare **prepares; |
|
|
464 | static int preparemax, preparecnt; |
|
|
465 | |
|
|
466 | static struct ev_check **checks; |
|
|
467 | static int checkmax, checkcnt; |
|
|
468 | |
|
|
469 | /*****************************************************************************/ |
|
|
470 | |
|
|
471 | static struct ev_child *childs [PID_HASHSIZE]; |
|
|
472 | static struct ev_signal childev; |
|
|
473 | |
|
|
474 | #ifndef WIN32 |
|
|
475 | |
|
|
476 | #ifndef WCONTINUED |
|
|
477 | # define WCONTINUED 0 |
|
|
478 | #endif |
|
|
479 | |
|
|
480 | static void |
|
|
481 | childcb (struct ev_signal *sw, int revents) |
|
|
482 | { |
|
|
483 | struct ev_child *w; |
|
|
484 | int pid, status; |
|
|
485 | |
|
|
486 | while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) |
|
|
487 | for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) |
|
|
488 | if (w->pid == pid || !w->pid) |
|
|
489 | { |
|
|
490 | w->rpid = pid; |
|
|
491 | w->rstatus = status; |
|
|
492 | event ((W)w, EV_CHILD); |
|
|
493 | } |
|
|
494 | } |
|
|
495 | |
|
|
496 | #endif |
|
|
497 | |
|
|
498 | /*****************************************************************************/ |
|
|
499 | |
|
|
500 | #if EV_USE_KQUEUE |
|
|
501 | # include "ev_kqueue.c" |
|
|
502 | #endif |
256 | #if HAVE_EPOLL |
503 | #if EV_USE_EPOLL |
257 | # include "ev_epoll.c" |
504 | # include "ev_epoll.c" |
258 | #endif |
505 | #endif |
|
|
506 | #if EV_USE_POLL |
|
|
507 | # include "ev_poll.c" |
|
|
508 | #endif |
259 | #if HAVE_SELECT |
509 | #if EV_USE_SELECT |
260 | # include "ev_select.c" |
510 | # include "ev_select.c" |
261 | #endif |
511 | #endif |
262 | |
512 | |
|
|
513 | int |
|
|
514 | ev_version_major (void) |
|
|
515 | { |
|
|
516 | return EV_VERSION_MAJOR; |
|
|
517 | } |
|
|
518 | |
|
|
519 | int |
|
|
520 | ev_version_minor (void) |
|
|
521 | { |
|
|
522 | return EV_VERSION_MINOR; |
|
|
523 | } |
|
|
524 | |
|
|
525 | /* return true if we are running with elevated privileges and ignore env variables */ |
|
|
526 | static int |
|
|
527 | enable_secure () |
|
|
528 | { |
|
|
529 | return getuid () != geteuid () |
|
|
530 | || getgid () != getegid (); |
|
|
531 | } |
|
|
532 | |
263 | int ev_init (int flags) |
533 | int ev_init (int methods) |
264 | { |
534 | { |
265 | #if HAVE_MONOTONIC |
|
|
266 | { |
|
|
267 | struct timespec ts; |
|
|
268 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
|
|
269 | have_monotonic = 1; |
|
|
270 | } |
|
|
271 | #endif |
|
|
272 | |
|
|
273 | ev_now = ev_time (); |
|
|
274 | now = get_clock (); |
|
|
275 | diff = ev_now - now; |
|
|
276 | |
|
|
277 | if (pipe (sigpipe)) |
|
|
278 | return 0; |
|
|
279 | |
|
|
280 | ev_method = EVMETHOD_NONE; |
|
|
281 | #if HAVE_EPOLL |
|
|
282 | if (ev_method == EVMETHOD_NONE) epoll_init (flags); |
|
|
283 | #endif |
|
|
284 | #if HAVE_SELECT |
|
|
285 | if (ev_method == EVMETHOD_NONE) select_init (flags); |
|
|
286 | #endif |
|
|
287 | |
|
|
288 | if (ev_method) |
535 | if (!ev_method) |
|
|
536 | { |
|
|
537 | #if EV_USE_MONOTONIC |
289 | { |
538 | { |
|
|
539 | struct timespec ts; |
|
|
540 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
|
|
541 | have_monotonic = 1; |
|
|
542 | } |
|
|
543 | #endif |
|
|
544 | |
|
|
545 | ev_now = ev_time (); |
|
|
546 | now = get_clock (); |
|
|
547 | now_floor = now; |
|
|
548 | diff = ev_now - now; |
|
|
549 | |
|
|
550 | if (pipe (sigpipe)) |
|
|
551 | return 0; |
|
|
552 | |
|
|
553 | if (methods == EVMETHOD_AUTO) |
|
|
554 | if (!enable_secure () && getenv ("LIBEV_METHODS")) |
|
|
555 | methods = atoi (getenv ("LIBEV_METHODS")); |
|
|
556 | else |
|
|
557 | methods = EVMETHOD_ANY; |
|
|
558 | |
|
|
559 | ev_method = 0; |
|
|
560 | #if EV_USE_KQUEUE |
|
|
561 | if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods); |
|
|
562 | #endif |
|
|
563 | #if EV_USE_EPOLL |
|
|
564 | if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods); |
|
|
565 | #endif |
|
|
566 | #if EV_USE_POLL |
|
|
567 | if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods); |
|
|
568 | #endif |
|
|
569 | #if EV_USE_SELECT |
|
|
570 | if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods); |
|
|
571 | #endif |
|
|
572 | |
|
|
573 | if (ev_method) |
|
|
574 | { |
290 | evw_init (&sigev, sigcb, 0); |
575 | ev_watcher_init (&sigev, sigcb); |
291 | siginit (); |
576 | siginit (); |
|
|
577 | |
|
|
578 | #ifndef WIN32 |
|
|
579 | ev_signal_init (&childev, childcb, SIGCHLD); |
|
|
580 | ev_signal_start (&childev); |
|
|
581 | #endif |
|
|
582 | } |
292 | } |
583 | } |
293 | |
584 | |
294 | return ev_method; |
585 | return ev_method; |
295 | } |
586 | } |
296 | |
587 | |
297 | void ev_prefork (void) |
588 | /*****************************************************************************/ |
298 | { |
|
|
299 | } |
|
|
300 | |
589 | |
|
|
590 | void |
|
|
591 | ev_fork_prepare (void) |
|
|
592 | { |
|
|
593 | /* nop */ |
|
|
594 | } |
|
|
595 | |
|
|
596 | void |
301 | void ev_postfork_parent (void) |
597 | ev_fork_parent (void) |
302 | { |
598 | { |
|
|
599 | /* nop */ |
303 | } |
600 | } |
304 | |
601 | |
|
|
602 | void |
305 | void ev_postfork_child (void) |
603 | ev_fork_child (void) |
306 | { |
604 | { |
307 | #if HAVE_EPOLL |
605 | #if EV_USE_EPOLL |
308 | if (ev_method == EVMETHOD_EPOLL) |
606 | if (ev_method == EVMETHOD_EPOLL) |
309 | epoll_postfork_child (); |
607 | epoll_postfork_child (); |
310 | #endif |
608 | #endif |
311 | |
609 | |
312 | evio_stop (&sigev); |
610 | ev_io_stop (&sigev); |
313 | close (sigpipe [0]); |
611 | close (sigpipe [0]); |
314 | close (sigpipe [1]); |
612 | close (sigpipe [1]); |
315 | pipe (sigpipe); |
613 | pipe (sigpipe); |
316 | siginit (); |
614 | siginit (); |
317 | } |
615 | } |
318 | |
616 | |
|
|
617 | /*****************************************************************************/ |
|
|
618 | |
319 | static void |
619 | static void |
320 | fd_reify (void) |
620 | call_pending (void) |
321 | { |
621 | { |
322 | int i; |
622 | int pri; |
323 | |
623 | |
324 | for (i = 0; i < fdchangecnt; ++i) |
624 | for (pri = NUMPRI; pri--; ) |
325 | { |
625 | while (pendingcnt [pri]) |
326 | int fd = fdchanges [i]; |
|
|
327 | ANFD *anfd = anfds + fd; |
|
|
328 | struct ev_io *w; |
|
|
329 | |
|
|
330 | int wev = 0; |
|
|
331 | |
|
|
332 | for (w = anfd->head; w; w = w->next) |
|
|
333 | wev |= w->events; |
|
|
334 | |
|
|
335 | if (anfd->wev != wev) |
|
|
336 | { |
626 | { |
337 | method_modify (fd, anfd->wev, wev); |
627 | ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
338 | anfd->wev = wev; |
|
|
339 | } |
|
|
340 | } |
|
|
341 | |
628 | |
342 | fdchangecnt = 0; |
|
|
343 | } |
|
|
344 | |
|
|
345 | static void |
|
|
346 | call_pending () |
|
|
347 | { |
|
|
348 | int i; |
|
|
349 | |
|
|
350 | for (i = 0; i < pendingcnt; ++i) |
|
|
351 | { |
|
|
352 | ANPENDING *p = pendings + i; |
|
|
353 | |
|
|
354 | if (p->w) |
629 | if (p->w) |
355 | { |
630 | { |
356 | p->w->pending = 0; |
631 | p->w->pending = 0; |
357 | p->w->cb (p->w, p->events); |
632 | p->w->cb (p->w, p->events); |
358 | } |
633 | } |
359 | } |
634 | } |
360 | |
|
|
361 | pendingcnt = 0; |
|
|
362 | } |
635 | } |
363 | |
636 | |
364 | static void |
637 | static void |
365 | timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now) |
638 | timers_reify (void) |
366 | { |
639 | { |
367 | while (timercnt && timers [0]->at <= now) |
640 | while (timercnt && timers [0]->at <= now) |
368 | { |
641 | { |
369 | struct ev_timer *w = timers [0]; |
642 | struct ev_timer *w = timers [0]; |
370 | |
643 | |
371 | /* first reschedule or stop timer */ |
644 | /* first reschedule or stop timer */ |
372 | if (w->repeat) |
645 | if (w->repeat) |
373 | { |
646 | { |
374 | if (w->is_abs) |
647 | assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
375 | w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat; |
|
|
376 | else |
|
|
377 | w->at = now + w->repeat; |
648 | w->at = now + w->repeat; |
378 | |
|
|
379 | assert (w->at > now); |
|
|
380 | |
|
|
381 | downheap (timers, timercnt, 0); |
649 | downheap ((WT *)timers, timercnt, 0); |
382 | } |
650 | } |
383 | else |
651 | else |
384 | { |
|
|
385 | evtimer_stop (w); /* nonrepeating: stop timer */ |
652 | ev_timer_stop (w); /* nonrepeating: stop timer */ |
386 | --timercnt; /* maybe pass by reference instead? */ |
653 | |
|
|
654 | event ((W)w, EV_TIMEOUT); |
|
|
655 | } |
|
|
656 | } |
|
|
657 | |
|
|
658 | static void |
|
|
659 | periodics_reify (void) |
|
|
660 | { |
|
|
661 | while (periodiccnt && periodics [0]->at <= ev_now) |
|
|
662 | { |
|
|
663 | struct ev_periodic *w = periodics [0]; |
|
|
664 | |
|
|
665 | /* first reschedule or stop timer */ |
|
|
666 | if (w->interval) |
387 | } |
667 | { |
|
|
668 | w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; |
|
|
669 | assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); |
|
|
670 | downheap ((WT *)periodics, periodiccnt, 0); |
|
|
671 | } |
|
|
672 | else |
|
|
673 | ev_periodic_stop (w); /* nonrepeating: stop timer */ |
388 | |
674 | |
389 | event ((struct ev_watcher *)w, EV_TIMEOUT); |
675 | event ((W)w, EV_PERIODIC); |
390 | } |
676 | } |
391 | } |
677 | } |
392 | |
678 | |
393 | static void |
679 | static void |
394 | time_update () |
680 | periodics_reschedule (ev_tstamp diff) |
395 | { |
681 | { |
396 | int i; |
682 | int i; |
397 | ev_now = ev_time (); |
|
|
398 | |
683 | |
399 | if (have_monotonic) |
684 | /* adjust periodics after time jump */ |
|
|
685 | for (i = 0; i < periodiccnt; ++i) |
400 | { |
686 | { |
401 | ev_tstamp odiff = diff; |
687 | struct ev_periodic *w = periodics [i]; |
402 | |
688 | |
403 | /* detecting time jumps is much more difficult */ |
689 | if (w->interval) |
404 | for (i = 2; --i; ) /* loop a few times, before making important decisions */ |
|
|
405 | { |
|
|
406 | now = get_clock (); |
|
|
407 | diff = ev_now - now; |
|
|
408 | |
|
|
409 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
|
|
410 | return; /* all is well */ |
|
|
411 | |
|
|
412 | ev_now = ev_time (); |
|
|
413 | } |
690 | { |
|
|
691 | ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; |
414 | |
692 | |
415 | /* time jump detected, reschedule atimers */ |
693 | if (fabs (diff) >= 1e-4) |
416 | for (i = 0; i < atimercnt; ++i) |
694 | { |
|
|
695 | ev_periodic_stop (w); |
|
|
696 | ev_periodic_start (w); |
|
|
697 | |
|
|
698 | i = 0; /* restart loop, inefficient, but time jumps should be rare */ |
|
|
699 | } |
417 | { |
700 | } |
418 | struct ev_timer *w = atimers [i]; |
701 | } |
419 | w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat; |
702 | } |
420 | } |
703 | |
|
|
704 | static int |
|
|
705 | time_update_monotonic (void) |
|
|
706 | { |
|
|
707 | now = get_clock (); |
|
|
708 | |
|
|
709 | if (expect_true (now - now_floor < MIN_TIMEJUMP * .5)) |
|
|
710 | { |
|
|
711 | ev_now = now + diff; |
|
|
712 | return 0; |
421 | } |
713 | } |
422 | else |
714 | else |
423 | { |
715 | { |
|
|
716 | now_floor = now; |
|
|
717 | ev_now = ev_time (); |
|
|
718 | return 1; |
|
|
719 | } |
|
|
720 | } |
|
|
721 | |
|
|
722 | static void |
|
|
723 | time_update (void) |
|
|
724 | { |
|
|
725 | int i; |
|
|
726 | |
|
|
727 | #if EV_USE_MONOTONIC |
|
|
728 | if (expect_true (have_monotonic)) |
|
|
729 | { |
|
|
730 | if (time_update_monotonic ()) |
|
|
731 | { |
|
|
732 | ev_tstamp odiff = diff; |
|
|
733 | |
|
|
734 | for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
|
|
735 | { |
|
|
736 | diff = ev_now - now; |
|
|
737 | |
|
|
738 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
|
|
739 | return; /* all is well */ |
|
|
740 | |
|
|
741 | ev_now = ev_time (); |
|
|
742 | now = get_clock (); |
|
|
743 | now_floor = now; |
|
|
744 | } |
|
|
745 | |
|
|
746 | periodics_reschedule (diff - odiff); |
|
|
747 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
|
|
748 | } |
|
|
749 | } |
|
|
750 | else |
|
|
751 | #endif |
|
|
752 | { |
|
|
753 | ev_now = ev_time (); |
|
|
754 | |
424 | if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) |
755 | if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) |
425 | /* time jump detected, adjust rtimers */ |
756 | { |
|
|
757 | periodics_reschedule (ev_now - now); |
|
|
758 | |
|
|
759 | /* adjust timers. this is easy, as the offset is the same for all */ |
426 | for (i = 0; i < rtimercnt; ++i) |
760 | for (i = 0; i < timercnt; ++i) |
427 | rtimers [i]->at += ev_now - now; |
761 | timers [i]->at += diff; |
|
|
762 | } |
428 | |
763 | |
429 | now = ev_now; |
764 | now = ev_now; |
430 | } |
765 | } |
431 | } |
766 | } |
432 | |
767 | |
433 | int ev_loop_done; |
768 | int ev_loop_done; |
434 | |
769 | |
435 | void ev_loop (int flags) |
770 | void ev_loop (int flags) |
436 | { |
771 | { |
437 | double block; |
772 | double block; |
438 | ev_loop_done = flags & EVLOOP_ONESHOT; |
773 | ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; |
439 | |
774 | |
440 | do |
775 | do |
441 | { |
776 | { |
|
|
777 | /* queue check watchers (and execute them) */ |
|
|
778 | if (expect_false (preparecnt)) |
|
|
779 | { |
|
|
780 | queue_events ((W *)prepares, preparecnt, EV_PREPARE); |
|
|
781 | call_pending (); |
|
|
782 | } |
|
|
783 | |
442 | /* update fd-related kernel structures */ |
784 | /* update fd-related kernel structures */ |
443 | fd_reify (); |
785 | fd_reify (); |
444 | |
786 | |
445 | /* calculate blocking time */ |
787 | /* calculate blocking time */ |
|
|
788 | |
|
|
789 | /* we only need this for !monotonic clockor timers, but as we basically |
|
|
790 | always have timers, we just calculate it always */ |
|
|
791 | #if EV_USE_MONOTONIC |
|
|
792 | if (expect_true (have_monotonic)) |
|
|
793 | time_update_monotonic (); |
|
|
794 | else |
|
|
795 | #endif |
|
|
796 | { |
|
|
797 | ev_now = ev_time (); |
|
|
798 | now = ev_now; |
|
|
799 | } |
|
|
800 | |
446 | if (flags & EVLOOP_NONBLOCK) |
801 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
447 | block = 0.; |
802 | block = 0.; |
448 | else |
803 | else |
449 | { |
804 | { |
450 | block = MAX_BLOCKTIME; |
805 | block = MAX_BLOCKTIME; |
451 | |
806 | |
452 | if (rtimercnt) |
807 | if (timercnt) |
453 | { |
808 | { |
454 | ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge; |
809 | ev_tstamp to = timers [0]->at - now + method_fudge; |
455 | if (block > to) block = to; |
810 | if (block > to) block = to; |
456 | } |
811 | } |
457 | |
812 | |
458 | if (atimercnt) |
813 | if (periodiccnt) |
459 | { |
814 | { |
460 | ev_tstamp to = atimers [0]->at - ev_time () + method_fudge; |
815 | ev_tstamp to = periodics [0]->at - ev_now + method_fudge; |
461 | if (block > to) block = to; |
816 | if (block > to) block = to; |
462 | } |
817 | } |
463 | |
818 | |
464 | if (block < 0.) block = 0.; |
819 | if (block < 0.) block = 0.; |
465 | } |
820 | } |
… | |
… | |
467 | method_poll (block); |
822 | method_poll (block); |
468 | |
823 | |
469 | /* update ev_now, do magic */ |
824 | /* update ev_now, do magic */ |
470 | time_update (); |
825 | time_update (); |
471 | |
826 | |
472 | /* put pending timers into pendign queue and reschedule them */ |
827 | /* queue pending timers and reschedule them */ |
473 | /* absolute timers first */ |
828 | timers_reify (); /* relative timers called last */ |
474 | timers_reify (atimers, atimercnt, ev_now); |
829 | periodics_reify (); /* absolute timers called first */ |
475 | /* relative timers second */ |
830 | |
476 | timers_reify (rtimers, rtimercnt, now); |
831 | /* queue idle watchers unless io or timers are pending */ |
|
|
832 | if (!pendingcnt) |
|
|
833 | queue_events ((W *)idles, idlecnt, EV_IDLE); |
|
|
834 | |
|
|
835 | /* queue check watchers, to be executed first */ |
|
|
836 | if (checkcnt) |
|
|
837 | queue_events ((W *)checks, checkcnt, EV_CHECK); |
477 | |
838 | |
478 | call_pending (); |
839 | call_pending (); |
479 | } |
840 | } |
480 | while (!ev_loop_done); |
841 | while (!ev_loop_done); |
481 | } |
|
|
482 | |
842 | |
|
|
843 | if (ev_loop_done != 2) |
|
|
844 | ev_loop_done = 0; |
|
|
845 | } |
|
|
846 | |
|
|
847 | /*****************************************************************************/ |
|
|
848 | |
483 | static void |
849 | static void |
484 | wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem) |
850 | wlist_add (WL *head, WL elem) |
485 | { |
851 | { |
486 | elem->next = *head; |
852 | elem->next = *head; |
487 | *head = elem; |
853 | *head = elem; |
488 | } |
854 | } |
489 | |
855 | |
490 | static void |
856 | static void |
491 | wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem) |
857 | wlist_del (WL *head, WL elem) |
492 | { |
858 | { |
493 | while (*head) |
859 | while (*head) |
494 | { |
860 | { |
495 | if (*head == elem) |
861 | if (*head == elem) |
496 | { |
862 | { |
… | |
… | |
501 | head = &(*head)->next; |
867 | head = &(*head)->next; |
502 | } |
868 | } |
503 | } |
869 | } |
504 | |
870 | |
505 | static void |
871 | static void |
506 | ev_start (struct ev_watcher *w, int active) |
872 | ev_clear_pending (W w) |
507 | { |
873 | { |
|
|
874 | if (w->pending) |
|
|
875 | { |
|
|
876 | pendings [ABSPRI (w)][w->pending - 1].w = 0; |
508 | w->pending = 0; |
877 | w->pending = 0; |
|
|
878 | } |
|
|
879 | } |
|
|
880 | |
|
|
881 | static void |
|
|
882 | ev_start (W w, int active) |
|
|
883 | { |
|
|
884 | if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; |
|
|
885 | if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI; |
|
|
886 | |
509 | w->active = active; |
887 | w->active = active; |
510 | } |
888 | } |
511 | |
889 | |
512 | static void |
890 | static void |
513 | ev_stop (struct ev_watcher *w) |
891 | ev_stop (W w) |
514 | { |
892 | { |
515 | if (w->pending) |
|
|
516 | pendings [w->pending - 1].w = 0; |
|
|
517 | |
|
|
518 | w->active = 0; |
893 | w->active = 0; |
519 | /* nop */ |
|
|
520 | } |
894 | } |
521 | |
895 | |
|
|
896 | /*****************************************************************************/ |
|
|
897 | |
522 | void |
898 | void |
523 | evio_start (struct ev_io *w) |
899 | ev_io_start (struct ev_io *w) |
524 | { |
900 | { |
|
|
901 | int fd = w->fd; |
|
|
902 | |
525 | if (ev_is_active (w)) |
903 | if (ev_is_active (w)) |
526 | return; |
904 | return; |
527 | |
905 | |
528 | int fd = w->fd; |
906 | assert (("ev_io_start called with negative fd", fd >= 0)); |
529 | |
907 | |
530 | ev_start ((struct ev_watcher *)w, 1); |
908 | ev_start ((W)w, 1); |
531 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
909 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
532 | wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w); |
910 | wlist_add ((WL *)&anfds[fd].head, (WL)w); |
533 | |
911 | |
534 | ++fdchangecnt; |
912 | fd_change (fd); |
535 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
|
|
536 | fdchanges [fdchangecnt - 1] = fd; |
|
|
537 | } |
913 | } |
538 | |
914 | |
539 | void |
915 | void |
540 | evio_stop (struct ev_io *w) |
916 | ev_io_stop (struct ev_io *w) |
541 | { |
917 | { |
|
|
918 | ev_clear_pending ((W)w); |
542 | if (!ev_is_active (w)) |
919 | if (!ev_is_active (w)) |
543 | return; |
920 | return; |
544 | |
921 | |
545 | wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w); |
922 | wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
546 | ev_stop ((struct ev_watcher *)w); |
923 | ev_stop ((W)w); |
547 | |
924 | |
548 | ++fdchangecnt; |
925 | fd_change (w->fd); |
549 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
|
|
550 | fdchanges [fdchangecnt - 1] = w->fd; |
|
|
551 | } |
926 | } |
552 | |
927 | |
553 | void |
928 | void |
554 | evtimer_start (struct ev_timer *w) |
929 | ev_timer_start (struct ev_timer *w) |
555 | { |
930 | { |
556 | if (ev_is_active (w)) |
931 | if (ev_is_active (w)) |
557 | return; |
932 | return; |
558 | |
933 | |
559 | if (w->is_abs) |
934 | w->at += now; |
|
|
935 | |
|
|
936 | assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
|
|
937 | |
|
|
938 | ev_start ((W)w, ++timercnt); |
|
|
939 | array_needsize (timers, timermax, timercnt, ); |
|
|
940 | timers [timercnt - 1] = w; |
|
|
941 | upheap ((WT *)timers, timercnt - 1); |
|
|
942 | } |
|
|
943 | |
|
|
944 | void |
|
|
945 | ev_timer_stop (struct ev_timer *w) |
|
|
946 | { |
|
|
947 | ev_clear_pending ((W)w); |
|
|
948 | if (!ev_is_active (w)) |
|
|
949 | return; |
|
|
950 | |
|
|
951 | if (w->active < timercnt--) |
|
|
952 | { |
|
|
953 | timers [w->active - 1] = timers [timercnt]; |
|
|
954 | downheap ((WT *)timers, timercnt, w->active - 1); |
560 | { |
955 | } |
561 | /* this formula differs from the one in timer_reify becuse we do not round up */ |
956 | |
|
|
957 | w->at = w->repeat; |
|
|
958 | |
|
|
959 | ev_stop ((W)w); |
|
|
960 | } |
|
|
961 | |
|
|
962 | void |
|
|
963 | ev_timer_again (struct ev_timer *w) |
|
|
964 | { |
|
|
965 | if (ev_is_active (w)) |
|
|
966 | { |
562 | if (w->repeat) |
967 | if (w->repeat) |
|
|
968 | { |
|
|
969 | w->at = now + w->repeat; |
|
|
970 | downheap ((WT *)timers, timercnt, w->active - 1); |
|
|
971 | } |
|
|
972 | else |
|
|
973 | ev_timer_stop (w); |
|
|
974 | } |
|
|
975 | else if (w->repeat) |
|
|
976 | ev_timer_start (w); |
|
|
977 | } |
|
|
978 | |
|
|
979 | void |
|
|
980 | ev_periodic_start (struct ev_periodic *w) |
|
|
981 | { |
|
|
982 | if (ev_is_active (w)) |
|
|
983 | return; |
|
|
984 | |
|
|
985 | assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); |
|
|
986 | |
|
|
987 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
|
|
988 | if (w->interval) |
563 | w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat; |
989 | w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; |
564 | |
990 | |
565 | ev_start ((struct ev_watcher *)w, ++atimercnt); |
991 | ev_start ((W)w, ++periodiccnt); |
566 | array_needsize (atimers, atimermax, atimercnt, ); |
992 | array_needsize (periodics, periodicmax, periodiccnt, ); |
567 | atimers [atimercnt - 1] = w; |
993 | periodics [periodiccnt - 1] = w; |
568 | upheap (atimers, atimercnt - 1); |
994 | upheap ((WT *)periodics, periodiccnt - 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 | } |
995 | } |
581 | |
996 | |
582 | void |
997 | void |
583 | evtimer_stop (struct ev_timer *w) |
998 | ev_periodic_stop (struct ev_periodic *w) |
584 | { |
999 | { |
|
|
1000 | ev_clear_pending ((W)w); |
585 | if (!ev_is_active (w)) |
1001 | if (!ev_is_active (w)) |
586 | return; |
1002 | return; |
587 | |
1003 | |
588 | if (w->is_abs) |
|
|
589 | { |
|
|
590 | if (w->active < atimercnt--) |
1004 | if (w->active < periodiccnt--) |
591 | { |
|
|
592 | atimers [w->active - 1] = atimers [atimercnt]; |
|
|
593 | downheap (atimers, atimercnt, w->active - 1); |
|
|
594 | } |
|
|
595 | } |
1005 | { |
596 | else |
1006 | periodics [w->active - 1] = periodics [periodiccnt]; |
|
|
1007 | downheap ((WT *)periodics, periodiccnt, w->active - 1); |
597 | { |
1008 | } |
598 | if (w->active < rtimercnt--) |
|
|
599 | { |
|
|
600 | rtimers [w->active - 1] = rtimers [rtimercnt]; |
|
|
601 | downheap (rtimers, rtimercnt, w->active - 1); |
|
|
602 | } |
|
|
603 | } |
|
|
604 | |
1009 | |
605 | ev_stop ((struct ev_watcher *)w); |
1010 | ev_stop ((W)w); |
606 | } |
1011 | } |
607 | |
1012 | |
608 | void |
1013 | void |
609 | evsignal_start (struct ev_signal *w) |
1014 | ev_signal_start (struct ev_signal *w) |
610 | { |
1015 | { |
611 | if (ev_is_active (w)) |
1016 | if (ev_is_active (w)) |
612 | return; |
1017 | return; |
613 | |
1018 | |
614 | ev_start ((struct ev_watcher *)w, 1); |
1019 | assert (("ev_signal_start called with illegal signal number", w->signum > 0)); |
|
|
1020 | |
|
|
1021 | ev_start ((W)w, 1); |
615 | array_needsize (signals, signalmax, w->signum, signals_init); |
1022 | 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); |
1023 | wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
617 | |
1024 | |
618 | if (!w->next) |
1025 | if (!w->next) |
619 | { |
1026 | { |
620 | struct sigaction sa; |
1027 | struct sigaction sa; |
621 | sa.sa_handler = sighandler; |
1028 | sa.sa_handler = sighandler; |
… | |
… | |
624 | sigaction (w->signum, &sa, 0); |
1031 | sigaction (w->signum, &sa, 0); |
625 | } |
1032 | } |
626 | } |
1033 | } |
627 | |
1034 | |
628 | void |
1035 | void |
629 | evsignal_stop (struct ev_signal *w) |
1036 | ev_signal_stop (struct ev_signal *w) |
630 | { |
1037 | { |
|
|
1038 | ev_clear_pending ((W)w); |
631 | if (!ev_is_active (w)) |
1039 | if (!ev_is_active (w)) |
632 | return; |
1040 | return; |
633 | |
1041 | |
634 | wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w); |
1042 | wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
635 | ev_stop ((struct ev_watcher *)w); |
1043 | ev_stop ((W)w); |
636 | |
1044 | |
637 | if (!signals [w->signum - 1].head) |
1045 | if (!signals [w->signum - 1].head) |
638 | signal (w->signum, SIG_DFL); |
1046 | signal (w->signum, SIG_DFL); |
639 | } |
1047 | } |
640 | |
1048 | |
|
|
1049 | void |
|
|
1050 | ev_idle_start (struct ev_idle *w) |
|
|
1051 | { |
|
|
1052 | if (ev_is_active (w)) |
|
|
1053 | return; |
|
|
1054 | |
|
|
1055 | ev_start ((W)w, ++idlecnt); |
|
|
1056 | array_needsize (idles, idlemax, idlecnt, ); |
|
|
1057 | idles [idlecnt - 1] = w; |
|
|
1058 | } |
|
|
1059 | |
|
|
1060 | void |
|
|
1061 | ev_idle_stop (struct ev_idle *w) |
|
|
1062 | { |
|
|
1063 | ev_clear_pending ((W)w); |
|
|
1064 | if (ev_is_active (w)) |
|
|
1065 | return; |
|
|
1066 | |
|
|
1067 | idles [w->active - 1] = idles [--idlecnt]; |
|
|
1068 | ev_stop ((W)w); |
|
|
1069 | } |
|
|
1070 | |
|
|
1071 | void |
|
|
1072 | ev_prepare_start (struct ev_prepare *w) |
|
|
1073 | { |
|
|
1074 | if (ev_is_active (w)) |
|
|
1075 | return; |
|
|
1076 | |
|
|
1077 | ev_start ((W)w, ++preparecnt); |
|
|
1078 | array_needsize (prepares, preparemax, preparecnt, ); |
|
|
1079 | prepares [preparecnt - 1] = w; |
|
|
1080 | } |
|
|
1081 | |
|
|
1082 | void |
|
|
1083 | ev_prepare_stop (struct ev_prepare *w) |
|
|
1084 | { |
|
|
1085 | ev_clear_pending ((W)w); |
|
|
1086 | if (ev_is_active (w)) |
|
|
1087 | return; |
|
|
1088 | |
|
|
1089 | prepares [w->active - 1] = prepares [--preparecnt]; |
|
|
1090 | ev_stop ((W)w); |
|
|
1091 | } |
|
|
1092 | |
|
|
1093 | void |
|
|
1094 | ev_check_start (struct ev_check *w) |
|
|
1095 | { |
|
|
1096 | if (ev_is_active (w)) |
|
|
1097 | return; |
|
|
1098 | |
|
|
1099 | ev_start ((W)w, ++checkcnt); |
|
|
1100 | array_needsize (checks, checkmax, checkcnt, ); |
|
|
1101 | checks [checkcnt - 1] = w; |
|
|
1102 | } |
|
|
1103 | |
|
|
1104 | void |
|
|
1105 | ev_check_stop (struct ev_check *w) |
|
|
1106 | { |
|
|
1107 | ev_clear_pending ((W)w); |
|
|
1108 | if (ev_is_active (w)) |
|
|
1109 | return; |
|
|
1110 | |
|
|
1111 | checks [w->active - 1] = checks [--checkcnt]; |
|
|
1112 | ev_stop ((W)w); |
|
|
1113 | } |
|
|
1114 | |
|
|
1115 | void |
|
|
1116 | ev_child_start (struct ev_child *w) |
|
|
1117 | { |
|
|
1118 | if (ev_is_active (w)) |
|
|
1119 | return; |
|
|
1120 | |
|
|
1121 | ev_start ((W)w, 1); |
|
|
1122 | wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
|
|
1123 | } |
|
|
1124 | |
|
|
1125 | void |
|
|
1126 | ev_child_stop (struct ev_child *w) |
|
|
1127 | { |
|
|
1128 | ev_clear_pending ((W)w); |
|
|
1129 | if (ev_is_active (w)) |
|
|
1130 | return; |
|
|
1131 | |
|
|
1132 | wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
|
|
1133 | ev_stop ((W)w); |
|
|
1134 | } |
|
|
1135 | |
641 | /*****************************************************************************/ |
1136 | /*****************************************************************************/ |
|
|
1137 | |
|
|
1138 | struct ev_once |
|
|
1139 | { |
|
|
1140 | struct ev_io io; |
|
|
1141 | struct ev_timer to; |
|
|
1142 | void (*cb)(int revents, void *arg); |
|
|
1143 | void *arg; |
|
|
1144 | }; |
|
|
1145 | |
|
|
1146 | static void |
|
|
1147 | once_cb (struct ev_once *once, int revents) |
|
|
1148 | { |
|
|
1149 | void (*cb)(int revents, void *arg) = once->cb; |
|
|
1150 | void *arg = once->arg; |
|
|
1151 | |
|
|
1152 | ev_io_stop (&once->io); |
|
|
1153 | ev_timer_stop (&once->to); |
|
|
1154 | free (once); |
|
|
1155 | |
|
|
1156 | cb (revents, arg); |
|
|
1157 | } |
|
|
1158 | |
|
|
1159 | static void |
|
|
1160 | once_cb_io (struct ev_io *w, int revents) |
|
|
1161 | { |
|
|
1162 | once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
|
|
1163 | } |
|
|
1164 | |
|
|
1165 | static void |
|
|
1166 | once_cb_to (struct ev_timer *w, int revents) |
|
|
1167 | { |
|
|
1168 | once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
|
|
1169 | } |
|
|
1170 | |
|
|
1171 | void |
|
|
1172 | ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
|
|
1173 | { |
|
|
1174 | struct ev_once *once = malloc (sizeof (struct ev_once)); |
|
|
1175 | |
|
|
1176 | if (!once) |
|
|
1177 | cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
|
|
1178 | else |
|
|
1179 | { |
|
|
1180 | once->cb = cb; |
|
|
1181 | once->arg = arg; |
|
|
1182 | |
|
|
1183 | ev_watcher_init (&once->io, once_cb_io); |
|
|
1184 | if (fd >= 0) |
|
|
1185 | { |
|
|
1186 | ev_io_set (&once->io, fd, events); |
|
|
1187 | ev_io_start (&once->io); |
|
|
1188 | } |
|
|
1189 | |
|
|
1190 | ev_watcher_init (&once->to, once_cb_to); |
|
|
1191 | if (timeout >= 0.) |
|
|
1192 | { |
|
|
1193 | ev_timer_set (&once->to, timeout, 0.); |
|
|
1194 | ev_timer_start (&once->to); |
|
|
1195 | } |
|
|
1196 | } |
|
|
1197 | } |
|
|
1198 | |
|
|
1199 | /*****************************************************************************/ |
|
|
1200 | |
642 | #if 1 |
1201 | #if 0 |
|
|
1202 | |
|
|
1203 | struct ev_io wio; |
643 | |
1204 | |
644 | static void |
1205 | static void |
645 | sin_cb (struct ev_io *w, int revents) |
1206 | sin_cb (struct ev_io *w, int revents) |
646 | { |
1207 | { |
647 | fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); |
1208 | fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); |
… | |
… | |
649 | |
1210 | |
650 | static void |
1211 | static void |
651 | ocb (struct ev_timer *w, int revents) |
1212 | ocb (struct ev_timer *w, int revents) |
652 | { |
1213 | { |
653 | //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); |
1214 | //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); |
654 | evtimer_stop (w); |
1215 | ev_timer_stop (w); |
655 | evtimer_start (w); |
1216 | ev_timer_start (w); |
656 | } |
1217 | } |
657 | |
1218 | |
658 | static void |
1219 | static void |
659 | scb (struct ev_signal *w, int revents) |
1220 | scb (struct ev_signal *w, int revents) |
660 | { |
1221 | { |
661 | fprintf (stderr, "signal %x,%d\n", revents, w->signum); |
1222 | fprintf (stderr, "signal %x,%d\n", revents, w->signum); |
|
|
1223 | ev_io_stop (&wio); |
|
|
1224 | ev_io_start (&wio); |
|
|
1225 | } |
|
|
1226 | |
|
|
1227 | static void |
|
|
1228 | gcb (struct ev_signal *w, int revents) |
|
|
1229 | { |
|
|
1230 | fprintf (stderr, "generic %x\n", revents); |
|
|
1231 | |
662 | } |
1232 | } |
663 | |
1233 | |
664 | int main (void) |
1234 | int main (void) |
665 | { |
1235 | { |
666 | struct ev_io sin; |
|
|
667 | |
|
|
668 | ev_init (0); |
1236 | ev_init (0); |
669 | |
1237 | |
670 | evw_init (&sin, sin_cb, 55); |
|
|
671 | evio_set (&sin, 0, EV_READ); |
1238 | ev_io_init (&wio, sin_cb, 0, EV_READ); |
672 | evio_start (&sin); |
1239 | ev_io_start (&wio); |
673 | |
1240 | |
674 | struct ev_timer t[10000]; |
1241 | struct ev_timer t[10000]; |
675 | |
1242 | |
676 | #if 0 |
1243 | #if 0 |
677 | int i; |
1244 | int i; |
678 | for (i = 0; i < 10000; ++i) |
1245 | for (i = 0; i < 10000; ++i) |
679 | { |
1246 | { |
680 | struct ev_timer *w = t + i; |
1247 | struct ev_timer *w = t + i; |
681 | evw_init (w, ocb, i); |
1248 | ev_watcher_init (w, ocb, i); |
682 | evtimer_set_abs (w, drand48 (), 0.99775533); |
1249 | ev_timer_init_abs (w, ocb, drand48 (), 0.99775533); |
683 | evtimer_start (w); |
1250 | ev_timer_start (w); |
684 | if (drand48 () < 0.5) |
1251 | if (drand48 () < 0.5) |
685 | evtimer_stop (w); |
1252 | ev_timer_stop (w); |
686 | } |
1253 | } |
687 | #endif |
1254 | #endif |
688 | |
1255 | |
689 | struct ev_timer t1; |
1256 | struct ev_timer t1; |
690 | evw_init (&t1, ocb, 0); |
1257 | ev_timer_init (&t1, ocb, 5, 10); |
691 | evtimer_set_abs (&t1, 5, 10); |
|
|
692 | evtimer_start (&t1); |
1258 | ev_timer_start (&t1); |
693 | |
1259 | |
694 | struct ev_signal sig; |
1260 | struct ev_signal sig; |
695 | evw_init (&sig, scb, 65535); |
|
|
696 | evsignal_set (&sig, SIGQUIT); |
1261 | ev_signal_init (&sig, scb, SIGQUIT); |
697 | evsignal_start (&sig); |
1262 | ev_signal_start (&sig); |
|
|
1263 | |
|
|
1264 | struct ev_check cw; |
|
|
1265 | ev_check_init (&cw, gcb); |
|
|
1266 | ev_check_start (&cw); |
|
|
1267 | |
|
|
1268 | struct ev_idle iw; |
|
|
1269 | ev_idle_init (&iw, gcb); |
|
|
1270 | ev_idle_start (&iw); |
698 | |
1271 | |
699 | ev_loop (0); |
1272 | ev_loop (0); |
700 | |
1273 | |
701 | return 0; |
1274 | return 0; |
702 | } |
1275 | } |