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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 | #ifndef EV_STANDALONE |
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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> |
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37 | #include <unistd.h> |
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38 | #include <fcntl.h> |
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39 | #include <signal.h> |
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40 | #include <stddef.h> |
3 | |
41 | |
4 | #include <stdio.h> |
42 | #include <stdio.h> |
5 | |
43 | |
6 | #include <assert.h> |
44 | #include <assert.h> |
7 | #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 |
8 | #include <sys/time.h> |
50 | #include <sys/time.h> |
9 | #include <time.h> |
51 | #include <time.h> |
10 | |
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_USEV_POLL |
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64 | # define EV_USEV_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 | |
11 | #ifdef CLOCK_MONOTONIC |
81 | #ifndef CLOCK_MONOTONIC |
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82 | # undef EV_USE_MONOTONIC |
12 | # define HAVE_MONOTONIC 1 |
83 | # define EV_USE_MONOTONIC 0 |
13 | #endif |
84 | #endif |
14 | |
85 | |
15 | #define HAVE_EPOLL 1 |
86 | #ifndef CLOCK_REALTIME |
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87 | # undef EV_USE_REALTIME |
16 | #define HAVE_REALTIME 1 |
88 | # define EV_USE_REALTIME 0 |
17 | #define HAVE_SELECT 1 |
89 | #endif |
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90 | |
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91 | /**/ |
18 | |
92 | |
19 | #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) */ |
20 | #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 */ |
21 | |
97 | |
22 | #include "ev.h" |
98 | #include "ev.h" |
23 | |
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 | |
24 | struct ev_watcher { |
114 | typedef struct ev_watcher *W; |
25 | EV_WATCHER (ev_watcher); |
115 | typedef struct ev_watcher_list *WL; |
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116 | typedef struct ev_watcher_time *WT; |
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117 | |
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118 | static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
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119 | |
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120 | /*****************************************************************************/ |
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121 | |
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122 | typedef struct |
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123 | { |
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124 | struct ev_watcher_list *head; |
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125 | unsigned char events; |
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126 | unsigned char reify; |
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127 | } ANFD; |
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128 | |
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129 | typedef struct |
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130 | { |
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131 | W w; |
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132 | int events; |
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133 | } ANPENDING; |
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134 | |
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135 | #if EV_MULTIPLICITY |
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136 | |
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137 | struct ev_loop |
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138 | { |
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139 | # define VAR(name,decl) decl; |
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140 | # include "ev_vars.h" |
26 | }; |
141 | }; |
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142 | # undef VAR |
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143 | # include "ev_wrap.h" |
27 | |
144 | |
28 | struct ev_watcher_list { |
145 | #else |
29 | EV_WATCHER_LIST (ev_watcher_list); |
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30 | }; |
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31 | |
146 | |
32 | static ev_tstamp now, diff; /* monotonic clock */ |
147 | # define VAR(name,decl) static decl; |
33 | ev_tstamp ev_now; |
148 | # include "ev_vars.h" |
34 | int ev_method; |
149 | # undef VAR |
35 | |
150 | |
36 | static int have_monotonic; /* runtime */ |
151 | #endif |
37 | |
152 | |
38 | static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ |
153 | /*****************************************************************************/ |
39 | static void (*method_modify)(int fd, int oev, int nev); |
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40 | static void (*method_poll)(ev_tstamp timeout); |
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41 | |
154 | |
42 | ev_tstamp |
155 | inline ev_tstamp |
43 | ev_time (void) |
156 | ev_time (void) |
44 | { |
157 | { |
45 | #if HAVE_REALTIME |
158 | #if EV_USE_REALTIME |
46 | struct timespec ts; |
159 | struct timespec ts; |
47 | clock_gettime (CLOCK_REALTIME, &ts); |
160 | clock_gettime (CLOCK_REALTIME, &ts); |
48 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
161 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
49 | #else |
162 | #else |
50 | struct timeval tv; |
163 | struct timeval tv; |
51 | gettimeofday (&tv, 0); |
164 | gettimeofday (&tv, 0); |
52 | return tv.tv_sec + tv.tv_usec * 1e-6; |
165 | return tv.tv_sec + tv.tv_usec * 1e-6; |
53 | #endif |
166 | #endif |
54 | } |
167 | } |
55 | |
168 | |
56 | static ev_tstamp |
169 | inline ev_tstamp |
57 | get_clock (void) |
170 | get_clock (void) |
58 | { |
171 | { |
59 | #if HAVE_MONOTONIC |
172 | #if EV_USE_MONOTONIC |
60 | if (have_monotonic) |
173 | if (expect_true (have_monotonic)) |
61 | { |
174 | { |
62 | struct timespec ts; |
175 | struct timespec ts; |
63 | clock_gettime (CLOCK_MONOTONIC, &ts); |
176 | clock_gettime (CLOCK_MONOTONIC, &ts); |
64 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
177 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
65 | } |
178 | } |
66 | #endif |
179 | #endif |
67 | |
180 | |
68 | return ev_time (); |
181 | return ev_time (); |
69 | } |
182 | } |
70 | |
183 | |
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184 | ev_tstamp |
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185 | ev_now (EV_P) |
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186 | { |
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187 | return rt_now; |
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188 | } |
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189 | |
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190 | #define array_roundsize(base,n) ((n) | 4 & ~3) |
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191 | |
71 | #define array_needsize(base,cur,cnt,init) \ |
192 | #define array_needsize(base,cur,cnt,init) \ |
72 | if ((cnt) > cur) \ |
193 | if (expect_false ((cnt) > cur)) \ |
73 | { \ |
194 | { \ |
74 | int newcnt = cur ? cur << 1 : 16; \ |
195 | int newcnt = cur; \ |
75 | fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ |
196 | do \ |
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197 | { \ |
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198 | newcnt = array_roundsize (base, newcnt << 1); \ |
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199 | } \ |
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200 | while ((cnt) > newcnt); \ |
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201 | \ |
76 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
202 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
77 | init (base + cur, newcnt - cur); \ |
203 | init (base + cur, newcnt - cur); \ |
78 | cur = newcnt; \ |
204 | cur = newcnt; \ |
79 | } |
205 | } |
80 | |
206 | |
81 | typedef struct |
207 | /*****************************************************************************/ |
82 | { |
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83 | struct ev_io *head; |
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84 | unsigned char wev, rev; /* want, received event set */ |
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85 | } ANFD; |
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86 | |
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87 | static ANFD *anfds; |
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88 | static int anfdmax; |
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89 | |
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90 | static int *fdchanges; |
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91 | static int fdchangemax, fdchangecnt; |
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92 | |
208 | |
93 | static void |
209 | static void |
94 | anfds_init (ANFD *base, int count) |
210 | anfds_init (ANFD *base, int count) |
95 | { |
211 | { |
96 | while (count--) |
212 | while (count--) |
97 | { |
213 | { |
98 | base->head = 0; |
214 | base->head = 0; |
99 | base->wev = base->rev = EV_NONE; |
215 | base->events = EV_NONE; |
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216 | base->reify = 0; |
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217 | |
100 | ++base; |
218 | ++base; |
101 | } |
219 | } |
102 | } |
220 | } |
103 | |
221 | |
104 | typedef struct |
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105 | { |
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106 | struct ev_watcher *w; |
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107 | int events; |
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108 | } ANPENDING; |
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109 | |
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110 | static ANPENDING *pendings; |
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111 | static int pendingmax, pendingcnt; |
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112 | |
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113 | static void |
222 | static void |
114 | event (struct ev_watcher *w, int events) |
223 | event (EV_P_ W w, int events) |
115 | { |
224 | { |
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225 | if (w->pending) |
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226 | { |
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227 | pendings [ABSPRI (w)][w->pending - 1].events |= events; |
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228 | return; |
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229 | } |
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230 | |
116 | w->pending = ++pendingcnt; |
231 | w->pending = ++pendingcnt [ABSPRI (w)]; |
117 | array_needsize (pendings, pendingmax, pendingcnt, ); |
232 | array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], ); |
118 | pendings [pendingcnt - 1].w = w; |
233 | pendings [ABSPRI (w)][w->pending - 1].w = w; |
119 | pendings [pendingcnt - 1].events = events; |
234 | pendings [ABSPRI (w)][w->pending - 1].events = events; |
120 | } |
235 | } |
121 | |
236 | |
122 | static void |
237 | static void |
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238 | queue_events (EV_P_ W *events, int eventcnt, int type) |
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239 | { |
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240 | int i; |
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241 | |
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242 | for (i = 0; i < eventcnt; ++i) |
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243 | event (EV_A_ events [i], type); |
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244 | } |
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245 | |
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246 | static void |
123 | fd_event (int fd, int events) |
247 | fd_event (EV_P_ int fd, int events) |
124 | { |
248 | { |
125 | ANFD *anfd = anfds + fd; |
249 | ANFD *anfd = anfds + fd; |
126 | struct ev_io *w; |
250 | struct ev_io *w; |
127 | |
251 | |
128 | for (w = anfd->head; w; w = w->next) |
252 | for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) |
129 | { |
253 | { |
130 | int ev = w->events & events; |
254 | int ev = w->events & events; |
131 | |
255 | |
132 | if (ev) |
256 | if (ev) |
133 | event ((struct ev_watcher *)w, ev); |
257 | event (EV_A_ (W)w, ev); |
134 | } |
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135 | } |
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136 | |
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137 | static struct ev_timer **atimers; |
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138 | static int atimermax, atimercnt; |
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139 | |
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140 | static struct ev_timer **rtimers; |
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141 | static int rtimermax, rtimercnt; |
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142 | |
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143 | static void |
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144 | upheap (struct ev_timer **timers, int k) |
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145 | { |
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146 | struct ev_timer *w = timers [k]; |
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147 | |
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148 | while (k && timers [k >> 1]->at > w->at) |
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149 | { |
258 | } |
150 | timers [k] = timers [k >> 1]; |
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151 | timers [k]->active = k + 1; |
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152 | k >>= 1; |
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153 | } |
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154 | |
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155 | timers [k] = w; |
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156 | timers [k]->active = k + 1; |
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157 | |
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158 | } |
259 | } |
159 | |
260 | |
160 | static void |
261 | /*****************************************************************************/ |
161 | downheap (struct ev_timer **timers, int N, int k) |
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162 | { |
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163 | struct ev_timer *w = timers [k]; |
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164 | |
262 | |
165 | while (k < (N >> 1)) |
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166 | { |
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167 | int j = k << 1; |
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168 | |
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169 | if (j + 1 < N && timers [j]->at > timers [j + 1]->at) |
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170 | ++j; |
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171 | |
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172 | if (w->at <= timers [j]->at) |
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173 | break; |
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174 | |
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175 | timers [k] = timers [j]; |
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176 | timers [k]->active = k + 1; |
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177 | k = j; |
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178 | } |
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179 | |
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180 | timers [k] = w; |
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181 | timers [k]->active = k + 1; |
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182 | } |
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183 | |
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184 | static struct ev_signal **signals; |
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185 | static int signalmax; |
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186 | |
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187 | static void |
263 | static void |
188 | signals_init (struct ev_signal **base, int count) |
264 | fd_reify (EV_P) |
189 | { |
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190 | while (count--) |
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191 | *base++ = 0; |
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192 | } |
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193 | |
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194 | #if HAVE_EPOLL |
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195 | # include "ev_epoll.c" |
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196 | #endif |
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197 | #if HAVE_SELECT |
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198 | # include "ev_select.c" |
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199 | #endif |
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200 | |
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201 | int ev_init (int flags) |
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202 | { |
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203 | #if HAVE_MONOTONIC |
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204 | { |
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205 | struct timespec ts; |
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206 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
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207 | have_monotonic = 1; |
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208 | } |
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209 | #endif |
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210 | |
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211 | ev_now = ev_time (); |
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212 | now = get_clock (); |
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213 | diff = ev_now - now; |
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214 | |
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215 | #if HAVE_EPOLL |
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216 | if (epoll_init (flags)) |
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217 | return ev_method; |
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218 | #endif |
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219 | #if HAVE_SELECT |
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220 | if (select_init (flags)) |
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221 | return ev_method; |
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222 | #endif |
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223 | |
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224 | ev_method = EVMETHOD_NONE; |
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225 | return ev_method; |
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226 | } |
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227 | |
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228 | void ev_prefork (void) |
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229 | { |
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230 | } |
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231 | |
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232 | void ev_postfork_parent (void) |
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233 | { |
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234 | } |
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235 | |
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236 | void ev_postfork_child (void) |
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237 | { |
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238 | #if HAVE_EPOLL |
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239 | if (ev_method == EVMETHOD_EPOLL) |
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240 | epoll_postfork_child (); |
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241 | #endif |
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242 | } |
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243 | |
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244 | static void |
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245 | fd_reify (void) |
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246 | { |
265 | { |
247 | int i; |
266 | int i; |
248 | |
267 | |
249 | for (i = 0; i < fdchangecnt; ++i) |
268 | for (i = 0; i < fdchangecnt; ++i) |
250 | { |
269 | { |
251 | int fd = fdchanges [i]; |
270 | int fd = fdchanges [i]; |
252 | ANFD *anfd = anfds + fd; |
271 | ANFD *anfd = anfds + fd; |
253 | struct ev_io *w; |
272 | struct ev_io *w; |
254 | |
273 | |
255 | int wev = 0; |
274 | int events = 0; |
256 | |
275 | |
257 | for (w = anfd->head; w; w = w->next) |
276 | for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) |
258 | wev |= w->events; |
277 | events |= w->events; |
259 | |
278 | |
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279 | anfd->reify = 0; |
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280 | |
260 | if (anfd->wev != wev) |
281 | if (anfd->events != events) |
261 | { |
282 | { |
262 | method_modify (fd, anfd->wev, wev); |
283 | method_modify (EV_A_ fd, anfd->events, events); |
263 | anfd->wev = wev; |
284 | anfd->events = events; |
264 | } |
285 | } |
265 | } |
286 | } |
266 | |
287 | |
267 | fdchangecnt = 0; |
288 | fdchangecnt = 0; |
268 | } |
289 | } |
269 | |
290 | |
270 | static void |
291 | static void |
271 | call_pending () |
292 | fd_change (EV_P_ int fd) |
272 | { |
293 | { |
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294 | if (anfds [fd].reify || fdchangecnt < 0) |
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295 | return; |
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296 | |
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297 | anfds [fd].reify = 1; |
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298 | |
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299 | ++fdchangecnt; |
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300 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
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301 | fdchanges [fdchangecnt - 1] = fd; |
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302 | } |
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303 | |
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304 | static void |
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305 | fd_kill (EV_P_ int fd) |
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306 | { |
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307 | struct ev_io *w; |
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308 | |
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309 | while ((w = (struct ev_io *)anfds [fd].head)) |
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310 | { |
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311 | ev_io_stop (EV_A_ w); |
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312 | event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
|
|
313 | } |
|
|
314 | } |
|
|
315 | |
|
|
316 | /* called on EBADF to verify fds */ |
|
|
317 | static void |
|
|
318 | fd_ebadf (EV_P) |
|
|
319 | { |
273 | int i; |
320 | int fd; |
274 | |
321 | |
275 | for (i = 0; i < pendingcnt; ++i) |
322 | for (fd = 0; fd < anfdmax; ++fd) |
|
|
323 | if (anfds [fd].events) |
|
|
324 | if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) |
|
|
325 | fd_kill (EV_A_ fd); |
|
|
326 | } |
|
|
327 | |
|
|
328 | /* called on ENOMEM in select/poll to kill some fds and retry */ |
|
|
329 | static void |
|
|
330 | fd_enomem (EV_P) |
|
|
331 | { |
|
|
332 | int fd = anfdmax; |
|
|
333 | |
|
|
334 | while (fd--) |
|
|
335 | if (anfds [fd].events) |
276 | { |
336 | { |
277 | ANPENDING *p = pendings + i; |
337 | close (fd); |
|
|
338 | fd_kill (EV_A_ fd); |
|
|
339 | return; |
|
|
340 | } |
|
|
341 | } |
278 | |
342 | |
279 | if (p->w) |
343 | /*****************************************************************************/ |
|
|
344 | |
|
|
345 | static void |
|
|
346 | upheap (WT *heap, int k) |
|
|
347 | { |
|
|
348 | WT w = heap [k]; |
|
|
349 | |
|
|
350 | while (k && heap [k >> 1]->at > w->at) |
|
|
351 | { |
|
|
352 | heap [k] = heap [k >> 1]; |
|
|
353 | heap [k]->active = k + 1; |
|
|
354 | k >>= 1; |
|
|
355 | } |
|
|
356 | |
|
|
357 | heap [k] = w; |
|
|
358 | heap [k]->active = k + 1; |
|
|
359 | |
|
|
360 | } |
|
|
361 | |
|
|
362 | static void |
|
|
363 | downheap (WT *heap, int N, int k) |
|
|
364 | { |
|
|
365 | WT w = heap [k]; |
|
|
366 | |
|
|
367 | while (k < (N >> 1)) |
|
|
368 | { |
|
|
369 | int j = k << 1; |
|
|
370 | |
|
|
371 | if (j + 1 < N && heap [j]->at > heap [j + 1]->at) |
|
|
372 | ++j; |
|
|
373 | |
|
|
374 | if (w->at <= heap [j]->at) |
|
|
375 | break; |
|
|
376 | |
|
|
377 | heap [k] = heap [j]; |
|
|
378 | heap [k]->active = k + 1; |
|
|
379 | k = j; |
|
|
380 | } |
|
|
381 | |
|
|
382 | heap [k] = w; |
|
|
383 | heap [k]->active = k + 1; |
|
|
384 | } |
|
|
385 | |
|
|
386 | /*****************************************************************************/ |
|
|
387 | |
|
|
388 | typedef struct |
|
|
389 | { |
|
|
390 | struct ev_watcher_list *head; |
|
|
391 | sig_atomic_t volatile gotsig; |
|
|
392 | } ANSIG; |
|
|
393 | |
|
|
394 | static ANSIG *signals; |
|
|
395 | static int signalmax; |
|
|
396 | |
|
|
397 | static int sigpipe [2]; |
|
|
398 | static sig_atomic_t volatile gotsig; |
|
|
399 | |
|
|
400 | static void |
|
|
401 | signals_init (ANSIG *base, int count) |
|
|
402 | { |
|
|
403 | while (count--) |
|
|
404 | { |
|
|
405 | base->head = 0; |
|
|
406 | base->gotsig = 0; |
|
|
407 | |
|
|
408 | ++base; |
|
|
409 | } |
|
|
410 | } |
|
|
411 | |
|
|
412 | static void |
|
|
413 | sighandler (int signum) |
|
|
414 | { |
|
|
415 | signals [signum - 1].gotsig = 1; |
|
|
416 | |
|
|
417 | if (!gotsig) |
|
|
418 | { |
|
|
419 | int old_errno = errno; |
|
|
420 | gotsig = 1; |
|
|
421 | write (sigpipe [1], &signum, 1); |
|
|
422 | errno = old_errno; |
|
|
423 | } |
|
|
424 | } |
|
|
425 | |
|
|
426 | static void |
|
|
427 | sigcb (EV_P_ struct ev_io *iow, int revents) |
|
|
428 | { |
|
|
429 | struct ev_watcher_list *w; |
|
|
430 | int signum; |
|
|
431 | |
|
|
432 | read (sigpipe [0], &revents, 1); |
|
|
433 | gotsig = 0; |
|
|
434 | |
|
|
435 | for (signum = signalmax; signum--; ) |
|
|
436 | if (signals [signum].gotsig) |
|
|
437 | { |
|
|
438 | signals [signum].gotsig = 0; |
|
|
439 | |
|
|
440 | for (w = signals [signum].head; w; w = w->next) |
|
|
441 | event (EV_A_ (W)w, EV_SIGNAL); |
|
|
442 | } |
|
|
443 | } |
|
|
444 | |
|
|
445 | static void |
|
|
446 | siginit (EV_P) |
|
|
447 | { |
|
|
448 | #ifndef WIN32 |
|
|
449 | fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); |
|
|
450 | fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC); |
|
|
451 | |
|
|
452 | /* rather than sort out wether we really need nb, set it */ |
|
|
453 | fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); |
|
|
454 | fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); |
|
|
455 | #endif |
|
|
456 | |
|
|
457 | ev_io_set (&sigev, sigpipe [0], EV_READ); |
|
|
458 | ev_io_start (EV_A_ &sigev); |
|
|
459 | ev_unref (EV_A); /* child watcher should not keep loop alive */ |
|
|
460 | } |
|
|
461 | |
|
|
462 | /*****************************************************************************/ |
|
|
463 | |
|
|
464 | #ifndef WIN32 |
|
|
465 | |
|
|
466 | #ifndef WCONTINUED |
|
|
467 | # define WCONTINUED 0 |
|
|
468 | #endif |
|
|
469 | |
|
|
470 | static void |
|
|
471 | child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status) |
|
|
472 | { |
|
|
473 | struct ev_child *w; |
|
|
474 | |
|
|
475 | for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next) |
|
|
476 | if (w->pid == pid || !w->pid) |
|
|
477 | { |
|
|
478 | w->priority = sw->priority; /* need to do it *now* */ |
|
|
479 | w->rpid = pid; |
|
|
480 | w->rstatus = status; |
|
|
481 | event (EV_A_ (W)w, EV_CHILD); |
|
|
482 | } |
|
|
483 | } |
|
|
484 | |
|
|
485 | static void |
|
|
486 | childcb (EV_P_ struct ev_signal *sw, int revents) |
|
|
487 | { |
|
|
488 | int pid, status; |
|
|
489 | |
|
|
490 | if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
|
|
491 | { |
|
|
492 | /* make sure we are called again until all childs have been reaped */ |
|
|
493 | event (EV_A_ (W)sw, EV_SIGNAL); |
|
|
494 | |
|
|
495 | child_reap (EV_A_ sw, pid, pid, status); |
|
|
496 | child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ |
|
|
497 | } |
|
|
498 | } |
|
|
499 | |
|
|
500 | #endif |
|
|
501 | |
|
|
502 | /*****************************************************************************/ |
|
|
503 | |
|
|
504 | #if EV_USE_KQUEUE |
|
|
505 | # include "ev_kqueue.c" |
|
|
506 | #endif |
|
|
507 | #if EV_USE_EPOLL |
|
|
508 | # include "ev_epoll.c" |
|
|
509 | #endif |
|
|
510 | #if EV_USEV_POLL |
|
|
511 | # include "ev_poll.c" |
|
|
512 | #endif |
|
|
513 | #if EV_USE_SELECT |
|
|
514 | # include "ev_select.c" |
|
|
515 | #endif |
|
|
516 | |
|
|
517 | int |
|
|
518 | ev_version_major (void) |
|
|
519 | { |
|
|
520 | return EV_VERSION_MAJOR; |
|
|
521 | } |
|
|
522 | |
|
|
523 | int |
|
|
524 | ev_version_minor (void) |
|
|
525 | { |
|
|
526 | return EV_VERSION_MINOR; |
|
|
527 | } |
|
|
528 | |
|
|
529 | /* return true if we are running with elevated privileges and should ignore env variables */ |
|
|
530 | static int |
|
|
531 | enable_secure (void) |
|
|
532 | { |
|
|
533 | #ifdef WIN32 |
|
|
534 | return 0; |
|
|
535 | #else |
|
|
536 | return getuid () != geteuid () |
|
|
537 | || getgid () != getegid (); |
|
|
538 | #endif |
|
|
539 | } |
|
|
540 | |
|
|
541 | int |
|
|
542 | ev_method (EV_P) |
|
|
543 | { |
|
|
544 | return method; |
|
|
545 | } |
|
|
546 | |
|
|
547 | inline int |
|
|
548 | loop_init (EV_P_ int methods) |
|
|
549 | { |
|
|
550 | if (!method) |
|
|
551 | { |
|
|
552 | #if EV_USE_MONOTONIC |
|
|
553 | { |
|
|
554 | struct timespec ts; |
|
|
555 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
|
|
556 | have_monotonic = 1; |
|
|
557 | } |
|
|
558 | #endif |
|
|
559 | |
|
|
560 | rt_now = ev_time (); |
|
|
561 | mn_now = get_clock (); |
|
|
562 | now_floor = mn_now; |
|
|
563 | rtmn_diff = rt_now - mn_now; |
|
|
564 | |
|
|
565 | if (pipe (sigpipe)) |
|
|
566 | return 0; |
|
|
567 | |
|
|
568 | if (methods == EVMETHOD_AUTO) |
|
|
569 | if (!enable_secure () && getenv ("LIBmethodS")) |
|
|
570 | methods = atoi (getenv ("LIBmethodS")); |
|
|
571 | else |
|
|
572 | methods = EVMETHOD_ANY; |
|
|
573 | |
|
|
574 | method = 0; |
|
|
575 | #if EV_USE_KQUEUE |
|
|
576 | if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); |
|
|
577 | #endif |
|
|
578 | #if EV_USE_EPOLL |
|
|
579 | if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); |
|
|
580 | #endif |
|
|
581 | #if EV_USEV_POLL |
|
|
582 | if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); |
|
|
583 | #endif |
|
|
584 | #if EV_USE_SELECT |
|
|
585 | if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); |
|
|
586 | #endif |
|
|
587 | |
|
|
588 | if (method) |
280 | { |
589 | { |
281 | p->w->pending = 0; |
590 | ev_watcher_init (&sigev, sigcb); |
282 | p->w->cb (p->w, p->events); |
591 | ev_set_priority (&sigev, EV_MAXPRI); |
|
|
592 | siginit (EV_A); |
|
|
593 | |
|
|
594 | #ifndef WIN32 |
|
|
595 | ev_signal_init (&childev, childcb, SIGCHLD); |
|
|
596 | ev_set_priority (&childev, EV_MAXPRI); |
|
|
597 | ev_signal_start (EV_A_ &childev); |
|
|
598 | ev_unref (EV_A); /* child watcher should not keep loop alive */ |
|
|
599 | #endif |
283 | } |
600 | } |
284 | } |
601 | } |
285 | |
602 | |
286 | pendingcnt = 0; |
603 | return method; |
287 | } |
604 | } |
288 | |
605 | |
289 | static void |
606 | #if EV_MULTIPLICITY |
290 | timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now) |
607 | |
|
|
608 | struct ev_loop * |
|
|
609 | ev_loop_new (int methods) |
291 | { |
610 | { |
|
|
611 | struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop)); |
|
|
612 | |
|
|
613 | if (loop_init (EV_A_ methods)) |
|
|
614 | return loop; |
|
|
615 | |
|
|
616 | ev_loop_delete (loop); |
|
|
617 | |
|
|
618 | return 0; |
|
|
619 | } |
|
|
620 | |
|
|
621 | void |
|
|
622 | ev_loop_delete (EV_P) |
|
|
623 | { |
|
|
624 | /*TODO*/ |
|
|
625 | free (loop); |
|
|
626 | } |
|
|
627 | |
|
|
628 | #else |
|
|
629 | |
|
|
630 | int |
|
|
631 | ev_init (int methods) |
|
|
632 | { |
|
|
633 | return loop_init (methods); |
|
|
634 | } |
|
|
635 | |
|
|
636 | #endif |
|
|
637 | |
|
|
638 | /*****************************************************************************/ |
|
|
639 | |
|
|
640 | void |
|
|
641 | ev_fork_prepare (void) |
|
|
642 | { |
|
|
643 | /* nop */ |
|
|
644 | } |
|
|
645 | |
|
|
646 | void |
|
|
647 | ev_fork_parent (void) |
|
|
648 | { |
|
|
649 | /* nop */ |
|
|
650 | } |
|
|
651 | |
|
|
652 | void |
|
|
653 | ev_fork_child (void) |
|
|
654 | { |
|
|
655 | /*TODO*/ |
|
|
656 | #if !EV_MULTIPLICITY |
|
|
657 | #if EV_USE_EPOLL |
|
|
658 | if (method == EVMETHOD_EPOLL) |
|
|
659 | epoll_postfork_child (EV_A); |
|
|
660 | #endif |
|
|
661 | |
|
|
662 | ev_io_stop (EV_A_ &sigev); |
|
|
663 | close (sigpipe [0]); |
|
|
664 | close (sigpipe [1]); |
|
|
665 | pipe (sigpipe); |
|
|
666 | siginit (EV_A); |
|
|
667 | #endif |
|
|
668 | } |
|
|
669 | |
|
|
670 | /*****************************************************************************/ |
|
|
671 | |
|
|
672 | static void |
|
|
673 | call_pending (EV_P) |
|
|
674 | { |
|
|
675 | int pri; |
|
|
676 | |
|
|
677 | for (pri = NUMPRI; pri--; ) |
|
|
678 | while (pendingcnt [pri]) |
|
|
679 | { |
|
|
680 | ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
|
|
681 | |
|
|
682 | if (p->w) |
|
|
683 | { |
|
|
684 | p->w->pending = 0; |
|
|
685 | p->w->cb (EV_A_ p->w, p->events); |
|
|
686 | } |
|
|
687 | } |
|
|
688 | } |
|
|
689 | |
|
|
690 | static void |
|
|
691 | timers_reify (EV_P) |
|
|
692 | { |
292 | while (timercnt && timers [0]->at <= now) |
693 | while (timercnt && timers [0]->at <= mn_now) |
293 | { |
694 | { |
294 | struct ev_timer *w = timers [0]; |
695 | struct ev_timer *w = timers [0]; |
295 | |
696 | |
296 | /* first reschedule or stop timer */ |
697 | /* first reschedule or stop timer */ |
297 | if (w->repeat) |
698 | if (w->repeat) |
298 | { |
699 | { |
299 | if (w->is_abs) |
700 | assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
300 | w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat; |
|
|
301 | else |
|
|
302 | w->at = now + w->repeat; |
701 | w->at = mn_now + w->repeat; |
303 | |
|
|
304 | assert (w->at > now); |
|
|
305 | |
|
|
306 | downheap (timers, timercnt, 0); |
702 | downheap ((WT *)timers, timercnt, 0); |
307 | } |
703 | } |
308 | else |
704 | else |
|
|
705 | ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
|
|
706 | |
|
|
707 | event (EV_A_ (W)w, EV_TIMEOUT); |
|
|
708 | } |
|
|
709 | } |
|
|
710 | |
|
|
711 | static void |
|
|
712 | periodics_reify (EV_P) |
|
|
713 | { |
|
|
714 | while (periodiccnt && periodics [0]->at <= rt_now) |
|
|
715 | { |
|
|
716 | struct ev_periodic *w = periodics [0]; |
|
|
717 | |
|
|
718 | /* first reschedule or stop timer */ |
|
|
719 | if (w->interval) |
309 | { |
720 | { |
310 | evtimer_stop (w); /* nonrepeating: stop timer */ |
721 | w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval; |
311 | --timercnt; /* maybe pass by reference instead? */ |
722 | assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now)); |
|
|
723 | downheap ((WT *)periodics, periodiccnt, 0); |
312 | } |
724 | } |
|
|
725 | else |
|
|
726 | ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
313 | |
727 | |
314 | event ((struct ev_watcher *)w, EV_TIMEOUT); |
728 | event (EV_A_ (W)w, EV_PERIODIC); |
315 | } |
729 | } |
316 | } |
730 | } |
317 | |
731 | |
318 | static void |
732 | static void |
319 | time_update () |
733 | periodics_reschedule (EV_P) |
320 | { |
734 | { |
321 | int i; |
735 | int i; |
322 | ev_now = ev_time (); |
|
|
323 | |
736 | |
324 | if (have_monotonic) |
737 | /* adjust periodics after time jump */ |
|
|
738 | for (i = 0; i < periodiccnt; ++i) |
325 | { |
739 | { |
326 | ev_tstamp odiff = diff; |
740 | struct ev_periodic *w = periodics [i]; |
327 | |
741 | |
328 | /* detecting time jumps is much more difficult */ |
742 | if (w->interval) |
329 | for (i = 2; --i; ) /* loop a few times, before making important decisions */ |
|
|
330 | { |
743 | { |
331 | now = get_clock (); |
744 | ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval; |
332 | diff = ev_now - now; |
|
|
333 | |
745 | |
334 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
746 | if (fabs (diff) >= 1e-4) |
335 | return; /* all is well */ |
747 | { |
|
|
748 | ev_periodic_stop (EV_A_ w); |
|
|
749 | ev_periodic_start (EV_A_ w); |
336 | |
750 | |
337 | ev_now = ev_time (); |
751 | i = 0; /* restart loop, inefficient, but time jumps should be rare */ |
|
|
752 | } |
338 | } |
753 | } |
|
|
754 | } |
|
|
755 | } |
339 | |
756 | |
340 | /* time jump detected, reschedule atimers */ |
757 | inline int |
341 | for (i = 0; i < atimercnt; ++i) |
758 | time_update_monotonic (EV_P) |
|
|
759 | { |
|
|
760 | mn_now = get_clock (); |
|
|
761 | |
|
|
762 | if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
|
|
763 | { |
|
|
764 | rt_now = rtmn_diff + mn_now; |
|
|
765 | return 0; |
|
|
766 | } |
|
|
767 | else |
|
|
768 | { |
|
|
769 | now_floor = mn_now; |
|
|
770 | rt_now = ev_time (); |
|
|
771 | return 1; |
|
|
772 | } |
|
|
773 | } |
|
|
774 | |
|
|
775 | static void |
|
|
776 | time_update (EV_P) |
|
|
777 | { |
|
|
778 | int i; |
|
|
779 | |
|
|
780 | #if EV_USE_MONOTONIC |
|
|
781 | if (expect_true (have_monotonic)) |
|
|
782 | { |
|
|
783 | if (time_update_monotonic (EV_A)) |
342 | { |
784 | { |
343 | struct ev_timer *w = atimers [i]; |
785 | ev_tstamp odiff = rtmn_diff; |
344 | w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat; |
786 | |
|
|
787 | for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
|
|
788 | { |
|
|
789 | rtmn_diff = rt_now - mn_now; |
|
|
790 | |
|
|
791 | if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) |
|
|
792 | return; /* all is well */ |
|
|
793 | |
|
|
794 | rt_now = ev_time (); |
|
|
795 | mn_now = get_clock (); |
|
|
796 | now_floor = mn_now; |
|
|
797 | } |
|
|
798 | |
|
|
799 | periodics_reschedule (EV_A); |
|
|
800 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
|
|
801 | /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ |
345 | } |
802 | } |
346 | } |
803 | } |
347 | else |
804 | else |
|
|
805 | #endif |
348 | { |
806 | { |
349 | if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) |
807 | rt_now = ev_time (); |
350 | /* time jump detected, adjust rtimers */ |
808 | |
|
|
809 | if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) |
|
|
810 | { |
|
|
811 | periodics_reschedule (EV_A); |
|
|
812 | |
|
|
813 | /* adjust timers. this is easy, as the offset is the same for all */ |
351 | for (i = 0; i < rtimercnt; ++i) |
814 | for (i = 0; i < timercnt; ++i) |
352 | rtimers [i]->at += ev_now - now; |
815 | timers [i]->at += rt_now - mn_now; |
|
|
816 | } |
353 | |
817 | |
354 | now = ev_now; |
818 | mn_now = rt_now; |
355 | } |
819 | } |
356 | } |
820 | } |
357 | |
821 | |
358 | int ev_loop_done; |
822 | void |
|
|
823 | ev_ref (EV_P) |
|
|
824 | { |
|
|
825 | ++activecnt; |
|
|
826 | } |
359 | |
827 | |
|
|
828 | void |
|
|
829 | ev_unref (EV_P) |
|
|
830 | { |
|
|
831 | --activecnt; |
|
|
832 | } |
|
|
833 | |
|
|
834 | static int loop_done; |
|
|
835 | |
|
|
836 | void |
360 | void ev_loop (int flags) |
837 | ev_loop (EV_P_ int flags) |
361 | { |
838 | { |
362 | double block; |
839 | double block; |
363 | ev_loop_done = flags & EVLOOP_ONESHOT; |
840 | loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; |
364 | |
841 | |
365 | do |
842 | do |
366 | { |
843 | { |
|
|
844 | /* queue check watchers (and execute them) */ |
|
|
845 | if (expect_false (preparecnt)) |
|
|
846 | { |
|
|
847 | queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
|
|
848 | call_pending (EV_A); |
|
|
849 | } |
|
|
850 | |
367 | /* update fd-related kernel structures */ |
851 | /* update fd-related kernel structures */ |
368 | fd_reify (); |
852 | fd_reify (EV_A); |
369 | |
853 | |
370 | /* calculate blocking time */ |
854 | /* calculate blocking time */ |
|
|
855 | |
|
|
856 | /* we only need this for !monotonic clockor timers, but as we basically |
|
|
857 | always have timers, we just calculate it always */ |
|
|
858 | #if EV_USE_MONOTONIC |
|
|
859 | if (expect_true (have_monotonic)) |
|
|
860 | time_update_monotonic (EV_A); |
|
|
861 | else |
|
|
862 | #endif |
|
|
863 | { |
|
|
864 | rt_now = ev_time (); |
|
|
865 | mn_now = rt_now; |
|
|
866 | } |
|
|
867 | |
371 | if (flags & EVLOOP_NONBLOCK) |
868 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
372 | block = 0.; |
869 | block = 0.; |
373 | else |
870 | else |
374 | { |
871 | { |
375 | block = MAX_BLOCKTIME; |
872 | block = MAX_BLOCKTIME; |
376 | |
873 | |
377 | if (rtimercnt) |
874 | if (timercnt) |
378 | { |
875 | { |
379 | ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge; |
876 | ev_tstamp to = timers [0]->at - mn_now + method_fudge; |
380 | if (block > to) block = to; |
877 | if (block > to) block = to; |
381 | } |
878 | } |
382 | |
879 | |
383 | if (atimercnt) |
880 | if (periodiccnt) |
384 | { |
881 | { |
385 | ev_tstamp to = atimers [0]->at - ev_time () + method_fudge; |
882 | ev_tstamp to = periodics [0]->at - rt_now + method_fudge; |
386 | if (block > to) block = to; |
883 | if (block > to) block = to; |
387 | } |
884 | } |
388 | |
885 | |
389 | if (block < 0.) block = 0.; |
886 | if (block < 0.) block = 0.; |
390 | } |
887 | } |
391 | |
888 | |
392 | method_poll (block); |
889 | method_poll (EV_A_ block); |
393 | |
890 | |
394 | /* update ev_now, do magic */ |
891 | /* update rt_now, do magic */ |
395 | time_update (); |
892 | time_update (EV_A); |
396 | |
893 | |
397 | /* put pending timers into pendign queue and reschedule them */ |
894 | /* queue pending timers and reschedule them */ |
398 | /* absolute timers first */ |
895 | timers_reify (EV_A); /* relative timers called last */ |
399 | timers_reify (atimers, atimercnt, ev_now); |
896 | periodics_reify (EV_A); /* absolute timers called first */ |
400 | /* relative timers second */ |
|
|
401 | timers_reify (rtimers, rtimercnt, now); |
|
|
402 | |
897 | |
|
|
898 | /* queue idle watchers unless io or timers are pending */ |
|
|
899 | if (!pendingcnt) |
|
|
900 | queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); |
|
|
901 | |
|
|
902 | /* queue check watchers, to be executed first */ |
|
|
903 | if (checkcnt) |
|
|
904 | queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
|
|
905 | |
403 | call_pending (); |
906 | call_pending (EV_A); |
404 | } |
907 | } |
405 | while (!ev_loop_done); |
908 | while (activecnt && !loop_done); |
406 | } |
|
|
407 | |
909 | |
408 | static void |
910 | if (loop_done != 2) |
409 | wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem) |
911 | loop_done = 0; |
|
|
912 | } |
|
|
913 | |
|
|
914 | void |
|
|
915 | ev_unloop (EV_P_ int how) |
|
|
916 | { |
|
|
917 | loop_done = how; |
|
|
918 | } |
|
|
919 | |
|
|
920 | /*****************************************************************************/ |
|
|
921 | |
|
|
922 | inline void |
|
|
923 | wlist_add (WL *head, WL elem) |
410 | { |
924 | { |
411 | elem->next = *head; |
925 | elem->next = *head; |
412 | *head = elem; |
926 | *head = elem; |
413 | } |
927 | } |
414 | |
928 | |
415 | static void |
929 | inline void |
416 | wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem) |
930 | wlist_del (WL *head, WL elem) |
417 | { |
931 | { |
418 | while (*head) |
932 | while (*head) |
419 | { |
933 | { |
420 | if (*head == elem) |
934 | if (*head == elem) |
421 | { |
935 | { |
… | |
… | |
425 | |
939 | |
426 | head = &(*head)->next; |
940 | head = &(*head)->next; |
427 | } |
941 | } |
428 | } |
942 | } |
429 | |
943 | |
430 | static void |
944 | inline void |
431 | ev_start (struct ev_watcher *w, int active) |
945 | ev_clear_pending (EV_P_ W w) |
432 | { |
946 | { |
|
|
947 | if (w->pending) |
|
|
948 | { |
|
|
949 | pendings [ABSPRI (w)][w->pending - 1].w = 0; |
433 | w->pending = 0; |
950 | w->pending = 0; |
|
|
951 | } |
|
|
952 | } |
|
|
953 | |
|
|
954 | inline void |
|
|
955 | ev_start (EV_P_ W w, int active) |
|
|
956 | { |
|
|
957 | if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; |
|
|
958 | if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI; |
|
|
959 | |
434 | w->active = active; |
960 | w->active = active; |
|
|
961 | ev_ref (EV_A); |
435 | } |
962 | } |
436 | |
963 | |
437 | static void |
964 | inline void |
438 | ev_stop (struct ev_watcher *w) |
965 | ev_stop (EV_P_ W w) |
439 | { |
966 | { |
440 | if (w->pending) |
967 | ev_unref (EV_A); |
441 | pendings [w->pending - 1].w = 0; |
|
|
442 | |
|
|
443 | w->active = 0; |
968 | w->active = 0; |
444 | /* nop */ |
|
|
445 | } |
969 | } |
446 | |
970 | |
|
|
971 | /*****************************************************************************/ |
|
|
972 | |
447 | void |
973 | void |
448 | evio_start (struct ev_io *w) |
974 | ev_io_start (EV_P_ struct ev_io *w) |
449 | { |
975 | { |
|
|
976 | int fd = w->fd; |
|
|
977 | |
450 | if (ev_is_active (w)) |
978 | if (ev_is_active (w)) |
451 | return; |
979 | return; |
452 | |
980 | |
453 | int fd = w->fd; |
981 | assert (("ev_io_start called with negative fd", fd >= 0)); |
454 | |
982 | |
455 | ev_start ((struct ev_watcher *)w, 1); |
983 | ev_start (EV_A_ (W)w, 1); |
456 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
984 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
457 | wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w); |
985 | wlist_add ((WL *)&anfds[fd].head, (WL)w); |
458 | |
986 | |
459 | ++fdchangecnt; |
987 | fd_change (EV_A_ fd); |
460 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
|
|
461 | fdchanges [fdchangecnt - 1] = fd; |
|
|
462 | } |
988 | } |
463 | |
989 | |
464 | void |
990 | void |
465 | evio_stop (struct ev_io *w) |
991 | ev_io_stop (EV_P_ struct ev_io *w) |
466 | { |
992 | { |
|
|
993 | ev_clear_pending (EV_A_ (W)w); |
467 | if (!ev_is_active (w)) |
994 | if (!ev_is_active (w)) |
468 | return; |
995 | return; |
469 | |
996 | |
470 | wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w); |
997 | wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
471 | ev_stop ((struct ev_watcher *)w); |
998 | ev_stop (EV_A_ (W)w); |
472 | |
999 | |
473 | ++fdchangecnt; |
1000 | fd_change (EV_A_ w->fd); |
474 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
|
|
475 | fdchanges [fdchangecnt - 1] = w->fd; |
|
|
476 | } |
1001 | } |
477 | |
1002 | |
478 | void |
1003 | void |
479 | evtimer_start (struct ev_timer *w) |
1004 | ev_timer_start (EV_P_ struct ev_timer *w) |
480 | { |
1005 | { |
481 | if (ev_is_active (w)) |
1006 | if (ev_is_active (w)) |
482 | return; |
1007 | return; |
483 | |
1008 | |
484 | if (w->is_abs) |
1009 | w->at += mn_now; |
|
|
1010 | |
|
|
1011 | assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
|
|
1012 | |
|
|
1013 | ev_start (EV_A_ (W)w, ++timercnt); |
|
|
1014 | array_needsize (timers, timermax, timercnt, ); |
|
|
1015 | timers [timercnt - 1] = w; |
|
|
1016 | upheap ((WT *)timers, timercnt - 1); |
|
|
1017 | } |
|
|
1018 | |
|
|
1019 | void |
|
|
1020 | ev_timer_stop (EV_P_ struct ev_timer *w) |
|
|
1021 | { |
|
|
1022 | ev_clear_pending (EV_A_ (W)w); |
|
|
1023 | if (!ev_is_active (w)) |
|
|
1024 | return; |
|
|
1025 | |
|
|
1026 | if (w->active < timercnt--) |
|
|
1027 | { |
|
|
1028 | timers [w->active - 1] = timers [timercnt]; |
|
|
1029 | downheap ((WT *)timers, timercnt, w->active - 1); |
485 | { |
1030 | } |
486 | /* this formula differs from the one in timer_reify becuse we do not round up */ |
1031 | |
|
|
1032 | w->at = w->repeat; |
|
|
1033 | |
|
|
1034 | ev_stop (EV_A_ (W)w); |
|
|
1035 | } |
|
|
1036 | |
|
|
1037 | void |
|
|
1038 | ev_timer_again (EV_P_ struct ev_timer *w) |
|
|
1039 | { |
|
|
1040 | if (ev_is_active (w)) |
|
|
1041 | { |
487 | if (w->repeat) |
1042 | if (w->repeat) |
|
|
1043 | { |
|
|
1044 | w->at = mn_now + w->repeat; |
|
|
1045 | downheap ((WT *)timers, timercnt, w->active - 1); |
|
|
1046 | } |
|
|
1047 | else |
|
|
1048 | ev_timer_stop (EV_A_ w); |
|
|
1049 | } |
|
|
1050 | else if (w->repeat) |
|
|
1051 | ev_timer_start (EV_A_ w); |
|
|
1052 | } |
|
|
1053 | |
|
|
1054 | void |
|
|
1055 | ev_periodic_start (EV_P_ struct ev_periodic *w) |
|
|
1056 | { |
|
|
1057 | if (ev_is_active (w)) |
|
|
1058 | return; |
|
|
1059 | |
|
|
1060 | assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); |
|
|
1061 | |
|
|
1062 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
|
|
1063 | if (w->interval) |
488 | w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat; |
1064 | w->at += ceil ((rt_now - w->at) / w->interval) * w->interval; |
489 | |
1065 | |
490 | ev_start ((struct ev_watcher *)w, ++atimercnt); |
1066 | ev_start (EV_A_ (W)w, ++periodiccnt); |
491 | array_needsize (atimers, atimermax, atimercnt, ); |
1067 | array_needsize (periodics, periodicmax, periodiccnt, ); |
492 | atimers [atimercnt - 1] = w; |
1068 | periodics [periodiccnt - 1] = w; |
493 | upheap (atimers, atimercnt - 1); |
1069 | upheap ((WT *)periodics, periodiccnt - 1); |
|
|
1070 | } |
|
|
1071 | |
|
|
1072 | void |
|
|
1073 | ev_periodic_stop (EV_P_ struct ev_periodic *w) |
|
|
1074 | { |
|
|
1075 | ev_clear_pending (EV_A_ (W)w); |
|
|
1076 | if (!ev_is_active (w)) |
|
|
1077 | return; |
|
|
1078 | |
|
|
1079 | if (w->active < periodiccnt--) |
494 | } |
1080 | { |
|
|
1081 | periodics [w->active - 1] = periodics [periodiccnt]; |
|
|
1082 | downheap ((WT *)periodics, periodiccnt, w->active - 1); |
|
|
1083 | } |
|
|
1084 | |
|
|
1085 | ev_stop (EV_A_ (W)w); |
|
|
1086 | } |
|
|
1087 | |
|
|
1088 | #ifndef SA_RESTART |
|
|
1089 | # define SA_RESTART 0 |
|
|
1090 | #endif |
|
|
1091 | |
|
|
1092 | void |
|
|
1093 | ev_signal_start (EV_P_ struct ev_signal *w) |
|
|
1094 | { |
|
|
1095 | if (ev_is_active (w)) |
|
|
1096 | return; |
|
|
1097 | |
|
|
1098 | assert (("ev_signal_start called with illegal signal number", w->signum > 0)); |
|
|
1099 | |
|
|
1100 | ev_start (EV_A_ (W)w, 1); |
|
|
1101 | array_needsize (signals, signalmax, w->signum, signals_init); |
|
|
1102 | wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
|
|
1103 | |
|
|
1104 | if (!w->next) |
|
|
1105 | { |
|
|
1106 | struct sigaction sa; |
|
|
1107 | sa.sa_handler = sighandler; |
|
|
1108 | sigfillset (&sa.sa_mask); |
|
|
1109 | sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
|
|
1110 | sigaction (w->signum, &sa, 0); |
|
|
1111 | } |
|
|
1112 | } |
|
|
1113 | |
|
|
1114 | void |
|
|
1115 | ev_signal_stop (EV_P_ struct ev_signal *w) |
|
|
1116 | { |
|
|
1117 | ev_clear_pending (EV_A_ (W)w); |
|
|
1118 | if (!ev_is_active (w)) |
|
|
1119 | return; |
|
|
1120 | |
|
|
1121 | wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
|
|
1122 | ev_stop (EV_A_ (W)w); |
|
|
1123 | |
|
|
1124 | if (!signals [w->signum - 1].head) |
|
|
1125 | signal (w->signum, SIG_DFL); |
|
|
1126 | } |
|
|
1127 | |
|
|
1128 | void |
|
|
1129 | ev_idle_start (EV_P_ struct ev_idle *w) |
|
|
1130 | { |
|
|
1131 | if (ev_is_active (w)) |
|
|
1132 | return; |
|
|
1133 | |
|
|
1134 | ev_start (EV_A_ (W)w, ++idlecnt); |
|
|
1135 | array_needsize (idles, idlemax, idlecnt, ); |
|
|
1136 | idles [idlecnt - 1] = w; |
|
|
1137 | } |
|
|
1138 | |
|
|
1139 | void |
|
|
1140 | ev_idle_stop (EV_P_ struct ev_idle *w) |
|
|
1141 | { |
|
|
1142 | ev_clear_pending (EV_A_ (W)w); |
|
|
1143 | if (ev_is_active (w)) |
|
|
1144 | return; |
|
|
1145 | |
|
|
1146 | idles [w->active - 1] = idles [--idlecnt]; |
|
|
1147 | ev_stop (EV_A_ (W)w); |
|
|
1148 | } |
|
|
1149 | |
|
|
1150 | void |
|
|
1151 | ev_prepare_start (EV_P_ struct ev_prepare *w) |
|
|
1152 | { |
|
|
1153 | if (ev_is_active (w)) |
|
|
1154 | return; |
|
|
1155 | |
|
|
1156 | ev_start (EV_A_ (W)w, ++preparecnt); |
|
|
1157 | array_needsize (prepares, preparemax, preparecnt, ); |
|
|
1158 | prepares [preparecnt - 1] = w; |
|
|
1159 | } |
|
|
1160 | |
|
|
1161 | void |
|
|
1162 | ev_prepare_stop (EV_P_ struct ev_prepare *w) |
|
|
1163 | { |
|
|
1164 | ev_clear_pending (EV_A_ (W)w); |
|
|
1165 | if (ev_is_active (w)) |
|
|
1166 | return; |
|
|
1167 | |
|
|
1168 | prepares [w->active - 1] = prepares [--preparecnt]; |
|
|
1169 | ev_stop (EV_A_ (W)w); |
|
|
1170 | } |
|
|
1171 | |
|
|
1172 | void |
|
|
1173 | ev_check_start (EV_P_ struct ev_check *w) |
|
|
1174 | { |
|
|
1175 | if (ev_is_active (w)) |
|
|
1176 | return; |
|
|
1177 | |
|
|
1178 | ev_start (EV_A_ (W)w, ++checkcnt); |
|
|
1179 | array_needsize (checks, checkmax, checkcnt, ); |
|
|
1180 | checks [checkcnt - 1] = w; |
|
|
1181 | } |
|
|
1182 | |
|
|
1183 | void |
|
|
1184 | ev_check_stop (EV_P_ struct ev_check *w) |
|
|
1185 | { |
|
|
1186 | ev_clear_pending (EV_A_ (W)w); |
|
|
1187 | if (ev_is_active (w)) |
|
|
1188 | return; |
|
|
1189 | |
|
|
1190 | checks [w->active - 1] = checks [--checkcnt]; |
|
|
1191 | ev_stop (EV_A_ (W)w); |
|
|
1192 | } |
|
|
1193 | |
|
|
1194 | void |
|
|
1195 | ev_child_start (EV_P_ struct ev_child *w) |
|
|
1196 | { |
|
|
1197 | if (ev_is_active (w)) |
|
|
1198 | return; |
|
|
1199 | |
|
|
1200 | ev_start (EV_A_ (W)w, 1); |
|
|
1201 | wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
|
|
1202 | } |
|
|
1203 | |
|
|
1204 | void |
|
|
1205 | ev_child_stop (EV_P_ struct ev_child *w) |
|
|
1206 | { |
|
|
1207 | ev_clear_pending (EV_A_ (W)w); |
|
|
1208 | if (ev_is_active (w)) |
|
|
1209 | return; |
|
|
1210 | |
|
|
1211 | wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
|
|
1212 | ev_stop (EV_A_ (W)w); |
|
|
1213 | } |
|
|
1214 | |
|
|
1215 | /*****************************************************************************/ |
|
|
1216 | |
|
|
1217 | struct ev_once |
|
|
1218 | { |
|
|
1219 | struct ev_io io; |
|
|
1220 | struct ev_timer to; |
|
|
1221 | void (*cb)(int revents, void *arg); |
|
|
1222 | void *arg; |
|
|
1223 | }; |
|
|
1224 | |
|
|
1225 | static void |
|
|
1226 | once_cb (EV_P_ struct ev_once *once, int revents) |
|
|
1227 | { |
|
|
1228 | void (*cb)(int revents, void *arg) = once->cb; |
|
|
1229 | void *arg = once->arg; |
|
|
1230 | |
|
|
1231 | ev_io_stop (EV_A_ &once->io); |
|
|
1232 | ev_timer_stop (EV_A_ &once->to); |
|
|
1233 | free (once); |
|
|
1234 | |
|
|
1235 | cb (revents, arg); |
|
|
1236 | } |
|
|
1237 | |
|
|
1238 | static void |
|
|
1239 | once_cb_io (EV_P_ struct ev_io *w, int revents) |
|
|
1240 | { |
|
|
1241 | once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
|
|
1242 | } |
|
|
1243 | |
|
|
1244 | static void |
|
|
1245 | once_cb_to (EV_P_ struct ev_timer *w, int revents) |
|
|
1246 | { |
|
|
1247 | once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
|
|
1248 | } |
|
|
1249 | |
|
|
1250 | void |
|
|
1251 | ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
|
|
1252 | { |
|
|
1253 | struct ev_once *once = malloc (sizeof (struct ev_once)); |
|
|
1254 | |
|
|
1255 | if (!once) |
|
|
1256 | cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
495 | else |
1257 | else |
496 | { |
1258 | { |
497 | w->at += now; |
1259 | once->cb = cb; |
|
|
1260 | once->arg = arg; |
498 | |
1261 | |
499 | ev_start ((struct ev_watcher *)w, ++rtimercnt); |
1262 | ev_watcher_init (&once->io, once_cb_io); |
500 | array_needsize (rtimers, rtimermax, rtimercnt, ); |
1263 | if (fd >= 0) |
501 | rtimers [rtimercnt - 1] = w; |
|
|
502 | upheap (rtimers, rtimercnt - 1); |
|
|
503 | } |
|
|
504 | |
|
|
505 | } |
|
|
506 | |
|
|
507 | void |
|
|
508 | evtimer_stop (struct ev_timer *w) |
|
|
509 | { |
|
|
510 | if (!ev_is_active (w)) |
|
|
511 | return; |
|
|
512 | |
|
|
513 | if (w->is_abs) |
|
|
514 | { |
|
|
515 | if (w->active < atimercnt--) |
|
|
516 | { |
1264 | { |
517 | atimers [w->active - 1] = atimers [atimercnt]; |
1265 | ev_io_set (&once->io, fd, events); |
518 | downheap (atimers, atimercnt, w->active - 1); |
1266 | ev_io_start (EV_A_ &once->io); |
519 | } |
1267 | } |
520 | } |
1268 | |
521 | else |
1269 | ev_watcher_init (&once->to, once_cb_to); |
522 | { |
1270 | if (timeout >= 0.) |
523 | if (w->active < rtimercnt--) |
|
|
524 | { |
1271 | { |
525 | rtimers [w->active - 1] = rtimers [rtimercnt]; |
1272 | ev_timer_set (&once->to, timeout, 0.); |
526 | downheap (rtimers, rtimercnt, w->active - 1); |
1273 | ev_timer_start (EV_A_ &once->to); |
527 | } |
1274 | } |
528 | } |
1275 | } |
529 | |
|
|
530 | ev_stop ((struct ev_watcher *)w); |
|
|
531 | } |
|
|
532 | |
|
|
533 | void |
|
|
534 | evsignal_start (struct ev_signal *w) |
|
|
535 | { |
|
|
536 | if (ev_is_active (w)) |
|
|
537 | return; |
|
|
538 | |
|
|
539 | ev_start ((struct ev_watcher *)w, 1); |
|
|
540 | array_needsize (signals, signalmax, w->signum, signals_init); |
|
|
541 | wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w); |
|
|
542 | } |
|
|
543 | |
|
|
544 | void |
|
|
545 | evsignal_stop (struct ev_signal *w) |
|
|
546 | { |
|
|
547 | if (!ev_is_active (w)) |
|
|
548 | return; |
|
|
549 | |
|
|
550 | wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w); |
|
|
551 | ev_stop ((struct ev_watcher *)w); |
|
|
552 | } |
1276 | } |
553 | |
1277 | |
554 | /*****************************************************************************/ |
1278 | /*****************************************************************************/ |
|
|
1279 | |
555 | #if 1 |
1280 | #if 0 |
|
|
1281 | |
|
|
1282 | struct ev_io wio; |
556 | |
1283 | |
557 | static void |
1284 | static void |
558 | sin_cb (struct ev_io *w, int revents) |
1285 | sin_cb (struct ev_io *w, int revents) |
559 | { |
1286 | { |
560 | fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); |
1287 | fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); |
… | |
… | |
562 | |
1289 | |
563 | static void |
1290 | static void |
564 | ocb (struct ev_timer *w, int revents) |
1291 | ocb (struct ev_timer *w, int revents) |
565 | { |
1292 | { |
566 | //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); |
1293 | //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); |
567 | evtimer_stop (w); |
1294 | ev_timer_stop (w); |
568 | evtimer_start (w); |
1295 | ev_timer_start (w); |
|
|
1296 | } |
|
|
1297 | |
|
|
1298 | static void |
|
|
1299 | scb (struct ev_signal *w, int revents) |
|
|
1300 | { |
|
|
1301 | fprintf (stderr, "signal %x,%d\n", revents, w->signum); |
|
|
1302 | ev_io_stop (&wio); |
|
|
1303 | ev_io_start (&wio); |
|
|
1304 | } |
|
|
1305 | |
|
|
1306 | static void |
|
|
1307 | gcb (struct ev_signal *w, int revents) |
|
|
1308 | { |
|
|
1309 | fprintf (stderr, "generic %x\n", revents); |
|
|
1310 | |
569 | } |
1311 | } |
570 | |
1312 | |
571 | int main (void) |
1313 | int main (void) |
572 | { |
1314 | { |
573 | struct ev_io sin; |
|
|
574 | |
|
|
575 | ev_init (0); |
1315 | ev_init (0); |
576 | |
1316 | |
577 | evw_init (&sin, sin_cb, 55); |
|
|
578 | evio_set (&sin, 0, EV_READ); |
1317 | ev_io_init (&wio, sin_cb, 0, EV_READ); |
579 | evio_start (&sin); |
1318 | ev_io_start (&wio); |
580 | |
1319 | |
581 | struct ev_timer t[10000]; |
1320 | struct ev_timer t[10000]; |
582 | |
1321 | |
583 | #if 1 |
1322 | #if 0 |
584 | int i; |
1323 | int i; |
585 | for (i = 0; i < 10000; ++i) |
1324 | for (i = 0; i < 10000; ++i) |
586 | { |
1325 | { |
587 | struct ev_timer *w = t + i; |
1326 | struct ev_timer *w = t + i; |
588 | evw_init (w, ocb, i); |
1327 | ev_watcher_init (w, ocb, i); |
589 | evtimer_set_abs (w, drand48 (), 0.99775533); |
1328 | ev_timer_init_abs (w, ocb, drand48 (), 0.99775533); |
590 | evtimer_start (w); |
1329 | ev_timer_start (w); |
591 | if (drand48 () < 0.5) |
1330 | if (drand48 () < 0.5) |
592 | evtimer_stop (w); |
1331 | ev_timer_stop (w); |
593 | } |
1332 | } |
594 | #endif |
1333 | #endif |
595 | |
1334 | |
596 | struct ev_timer t1; |
1335 | struct ev_timer t1; |
597 | evw_init (&t1, ocb, 0); |
1336 | ev_timer_init (&t1, ocb, 5, 10); |
598 | evtimer_set_abs (&t1, 5, 10); |
|
|
599 | evtimer_start (&t1); |
1337 | ev_timer_start (&t1); |
|
|
1338 | |
|
|
1339 | struct ev_signal sig; |
|
|
1340 | ev_signal_init (&sig, scb, SIGQUIT); |
|
|
1341 | ev_signal_start (&sig); |
|
|
1342 | |
|
|
1343 | struct ev_check cw; |
|
|
1344 | ev_check_init (&cw, gcb); |
|
|
1345 | ev_check_start (&cw); |
|
|
1346 | |
|
|
1347 | struct ev_idle iw; |
|
|
1348 | ev_idle_init (&iw, gcb); |
|
|
1349 | ev_idle_start (&iw); |
600 | |
1350 | |
601 | ev_loop (0); |
1351 | ev_loop (0); |
602 | |
1352 | |
603 | return 0; |
1353 | return 0; |
604 | } |
1354 | } |