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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 | |
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32 | #ifdef __cplusplus |
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33 | extern "C" { |
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34 | #endif |
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35 | |
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36 | #ifndef EV_STANDALONE |
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37 | # include "config.h" |
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38 | |
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39 | # if HAVE_CLOCK_GETTIME |
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40 | # ifndef EV_USE_MONOTONIC |
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41 | # define EV_USE_MONOTONIC 1 |
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42 | # endif |
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43 | # ifndef EV_USE_REALTIME |
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44 | # define EV_USE_REALTIME 1 |
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45 | # endif |
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46 | # endif |
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47 | |
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48 | # if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) |
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49 | # define EV_USE_SELECT 1 |
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50 | # endif |
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51 | |
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52 | # if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) |
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53 | # define EV_USE_POLL 1 |
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54 | # endif |
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55 | |
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56 | # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) |
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57 | # define EV_USE_EPOLL 1 |
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58 | # endif |
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59 | |
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60 | # if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) |
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61 | # define EV_USE_KQUEUE 1 |
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62 | # endif |
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63 | |
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64 | #endif |
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65 | |
1 | #include <math.h> |
66 | #include <math.h> |
2 | #include <stdlib.h> |
67 | #include <stdlib.h> |
3 | #include <unistd.h> |
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4 | #include <fcntl.h> |
68 | #include <fcntl.h> |
5 | #include <signal.h> |
69 | #include <stddef.h> |
6 | |
70 | |
7 | #include <stdio.h> |
71 | #include <stdio.h> |
8 | |
72 | |
9 | #include <assert.h> |
73 | #include <assert.h> |
10 | #include <errno.h> |
74 | #include <errno.h> |
11 | #include <sys/time.h> |
75 | #include <sys/types.h> |
12 | #include <time.h> |
76 | #include <time.h> |
13 | |
77 | |
14 | #define HAVE_EPOLL 1 |
78 | #include <signal.h> |
15 | |
79 | |
16 | #ifndef HAVE_MONOTONIC |
80 | #ifndef _WIN32 |
17 | # ifdef CLOCK_MONOTONIC |
81 | # include <unistd.h> |
18 | # define HAVE_MONOTONIC 1 |
82 | # include <sys/time.h> |
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83 | # include <sys/wait.h> |
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84 | #else |
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85 | # define WIN32_LEAN_AND_MEAN |
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86 | # include <windows.h> |
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87 | # ifndef EV_SELECT_IS_WINSOCKET |
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88 | # define EV_SELECT_IS_WINSOCKET 1 |
19 | # endif |
89 | # endif |
20 | #endif |
90 | #endif |
21 | |
91 | |
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92 | /**/ |
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93 | |
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94 | #ifndef EV_USE_MONOTONIC |
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95 | # define EV_USE_MONOTONIC 1 |
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96 | #endif |
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97 | |
22 | #ifndef HAVE_SELECT |
98 | #ifndef EV_USE_SELECT |
23 | # define HAVE_SELECT 1 |
99 | # define EV_USE_SELECT 1 |
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100 | # define EV_SELECT_USE_FD_SET 1 |
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101 | #endif |
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102 | |
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103 | #ifndef EV_USE_POLL |
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104 | # ifdef _WIN32 |
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105 | # define EV_USE_POLL 0 |
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106 | # else |
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107 | # define EV_USE_POLL 1 |
24 | #endif |
108 | # endif |
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109 | #endif |
25 | |
110 | |
26 | #ifndef HAVE_EPOLL |
111 | #ifndef EV_USE_EPOLL |
27 | # define HAVE_EPOLL 0 |
112 | # define EV_USE_EPOLL 0 |
28 | #endif |
113 | #endif |
29 | |
114 | |
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115 | #ifndef EV_USE_KQUEUE |
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116 | # define EV_USE_KQUEUE 0 |
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117 | #endif |
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118 | |
30 | #ifndef HAVE_REALTIME |
119 | #ifndef EV_USE_REALTIME |
31 | # define HAVE_REALTIME 1 /* posix requirement, but might be slower */ |
120 | # define EV_USE_REALTIME 1 |
32 | #endif |
121 | #endif |
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122 | |
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123 | /**/ |
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124 | |
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125 | /* darwin simply cannot be helped */ |
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126 | #ifdef __APPLE__ |
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127 | # undef EV_USE_POLL |
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128 | # undef EV_USE_KQUEUE |
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129 | #endif |
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130 | |
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131 | #ifndef CLOCK_MONOTONIC |
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132 | # undef EV_USE_MONOTONIC |
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133 | # define EV_USE_MONOTONIC 0 |
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134 | #endif |
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135 | |
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136 | #ifndef CLOCK_REALTIME |
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137 | # undef EV_USE_REALTIME |
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138 | # define EV_USE_REALTIME 0 |
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139 | #endif |
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140 | |
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141 | #if EV_SELECT_IS_WINSOCKET |
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142 | # include <winsock.h> |
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143 | #endif |
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144 | |
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145 | /**/ |
33 | |
146 | |
34 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
147 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
35 | #define MAX_BLOCKTIME 60. |
148 | #define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ |
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149 | #define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */ |
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150 | /*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ |
36 | |
151 | |
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152 | #ifdef EV_H |
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153 | # include EV_H |
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154 | #else |
37 | #include "ev.h" |
155 | # include "ev.h" |
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156 | #endif |
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157 | |
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158 | #if __GNUC__ >= 3 |
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159 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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160 | # define inline inline |
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161 | #else |
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162 | # define expect(expr,value) (expr) |
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163 | # define inline static |
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164 | #endif |
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165 | |
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166 | #define expect_false(expr) expect ((expr) != 0, 0) |
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167 | #define expect_true(expr) expect ((expr) != 0, 1) |
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168 | |
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169 | #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) |
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170 | #define ABSPRI(w) ((w)->priority - EV_MINPRI) |
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171 | |
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172 | #define EMPTY0 /* required for microsofts broken pseudo-c compiler */ |
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173 | #define EMPTY2(a,b) /* used to suppress some warnings */ |
38 | |
174 | |
39 | typedef struct ev_watcher *W; |
175 | typedef struct ev_watcher *W; |
40 | typedef struct ev_watcher_list *WL; |
176 | typedef struct ev_watcher_list *WL; |
41 | typedef struct ev_watcher_time *WT; |
177 | typedef struct ev_watcher_time *WT; |
42 | |
178 | |
43 | static ev_tstamp now, diff; /* monotonic clock */ |
179 | static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
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180 | |
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181 | #ifdef _WIN32 |
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182 | # include "ev_win32.c" |
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183 | #endif |
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184 | |
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185 | /*****************************************************************************/ |
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186 | |
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187 | static void (*syserr_cb)(const char *msg); |
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188 | |
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189 | void ev_set_syserr_cb (void (*cb)(const char *msg)) |
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190 | { |
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191 | syserr_cb = cb; |
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192 | } |
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193 | |
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194 | static void |
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195 | syserr (const char *msg) |
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196 | { |
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197 | if (!msg) |
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198 | msg = "(libev) system error"; |
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199 | |
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200 | if (syserr_cb) |
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201 | syserr_cb (msg); |
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202 | else |
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203 | { |
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204 | perror (msg); |
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205 | abort (); |
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206 | } |
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207 | } |
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208 | |
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209 | static void *(*alloc)(void *ptr, long size); |
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210 | |
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211 | void ev_set_allocator (void *(*cb)(void *ptr, long size)) |
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212 | { |
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213 | alloc = cb; |
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214 | } |
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215 | |
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216 | static void * |
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217 | ev_realloc (void *ptr, long size) |
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218 | { |
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219 | ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); |
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220 | |
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221 | if (!ptr && size) |
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222 | { |
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223 | fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
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224 | abort (); |
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225 | } |
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226 | |
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227 | return ptr; |
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228 | } |
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229 | |
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230 | #define ev_malloc(size) ev_realloc (0, (size)) |
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231 | #define ev_free(ptr) ev_realloc ((ptr), 0) |
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232 | |
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233 | /*****************************************************************************/ |
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234 | |
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235 | typedef struct |
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236 | { |
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237 | WL head; |
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238 | unsigned char events; |
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239 | unsigned char reify; |
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240 | #if EV_SELECT_IS_WINSOCKET |
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241 | SOCKET handle; |
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242 | #endif |
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243 | } ANFD; |
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244 | |
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245 | typedef struct |
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246 | { |
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247 | W w; |
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248 | int events; |
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249 | } ANPENDING; |
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250 | |
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251 | #if EV_MULTIPLICITY |
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252 | |
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253 | struct ev_loop |
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254 | { |
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255 | ev_tstamp ev_rt_now; |
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256 | #define ev_rt_now ((loop)->ev_rt_now) |
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257 | #define VAR(name,decl) decl; |
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258 | #include "ev_vars.h" |
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259 | #undef VAR |
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260 | }; |
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261 | #include "ev_wrap.h" |
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262 | |
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263 | struct ev_loop default_loop_struct; |
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264 | static struct ev_loop *default_loop; |
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265 | |
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266 | #else |
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267 | |
44 | ev_tstamp ev_now; |
268 | ev_tstamp ev_rt_now; |
45 | int ev_method; |
269 | #define VAR(name,decl) static decl; |
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270 | #include "ev_vars.h" |
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271 | #undef VAR |
46 | |
272 | |
47 | static int have_monotonic; /* runtime */ |
273 | static int default_loop; |
48 | |
274 | |
49 | static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ |
275 | #endif |
50 | static void (*method_modify)(int fd, int oev, int nev); |
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51 | static void (*method_poll)(ev_tstamp timeout); |
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52 | |
276 | |
53 | /*****************************************************************************/ |
277 | /*****************************************************************************/ |
54 | |
278 | |
55 | ev_tstamp |
279 | ev_tstamp |
56 | ev_time (void) |
280 | ev_time (void) |
57 | { |
281 | { |
58 | #if HAVE_REALTIME |
282 | #if EV_USE_REALTIME |
59 | struct timespec ts; |
283 | struct timespec ts; |
60 | clock_gettime (CLOCK_REALTIME, &ts); |
284 | clock_gettime (CLOCK_REALTIME, &ts); |
61 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
285 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
62 | #else |
286 | #else |
63 | struct timeval tv; |
287 | struct timeval tv; |
64 | gettimeofday (&tv, 0); |
288 | gettimeofday (&tv, 0); |
65 | return tv.tv_sec + tv.tv_usec * 1e-6; |
289 | return tv.tv_sec + tv.tv_usec * 1e-6; |
66 | #endif |
290 | #endif |
67 | } |
291 | } |
68 | |
292 | |
69 | static ev_tstamp |
293 | inline ev_tstamp |
70 | get_clock (void) |
294 | get_clock (void) |
71 | { |
295 | { |
72 | #if HAVE_MONOTONIC |
296 | #if EV_USE_MONOTONIC |
73 | if (have_monotonic) |
297 | if (expect_true (have_monotonic)) |
74 | { |
298 | { |
75 | struct timespec ts; |
299 | struct timespec ts; |
76 | clock_gettime (CLOCK_MONOTONIC, &ts); |
300 | clock_gettime (CLOCK_MONOTONIC, &ts); |
77 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
301 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
78 | } |
302 | } |
79 | #endif |
303 | #endif |
80 | |
304 | |
81 | return ev_time (); |
305 | return ev_time (); |
82 | } |
306 | } |
83 | |
307 | |
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308 | #if EV_MULTIPLICITY |
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309 | ev_tstamp |
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310 | ev_now (EV_P) |
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311 | { |
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312 | return ev_rt_now; |
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313 | } |
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314 | #endif |
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315 | |
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316 | #define array_roundsize(type,n) (((n) | 4) & ~3) |
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317 | |
84 | #define array_needsize(base,cur,cnt,init) \ |
318 | #define array_needsize(type,base,cur,cnt,init) \ |
85 | if ((cnt) > cur) \ |
319 | if (expect_false ((cnt) > cur)) \ |
86 | { \ |
320 | { \ |
87 | int newcnt = cur ? cur << 1 : 16; \ |
321 | int newcnt = cur; \ |
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322 | do \ |
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323 | { \ |
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324 | newcnt = array_roundsize (type, newcnt << 1); \ |
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325 | } \ |
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326 | while ((cnt) > newcnt); \ |
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327 | \ |
88 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
328 | base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\ |
89 | init (base + cur, newcnt - cur); \ |
329 | init (base + cur, newcnt - cur); \ |
90 | cur = newcnt; \ |
330 | cur = newcnt; \ |
91 | } |
331 | } |
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332 | |
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333 | #define array_slim(type,stem) \ |
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334 | if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ |
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335 | { \ |
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336 | stem ## max = array_roundsize (stem ## cnt >> 1); \ |
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337 | base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ |
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338 | fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ |
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339 | } |
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340 | |
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341 | #define array_free(stem, idx) \ |
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342 | ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; |
92 | |
343 | |
93 | /*****************************************************************************/ |
344 | /*****************************************************************************/ |
94 | |
345 | |
95 | typedef struct |
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96 | { |
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97 | struct ev_io *head; |
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98 | unsigned char wev, rev; /* want, received event set */ |
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99 | } ANFD; |
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100 | |
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101 | static ANFD *anfds; |
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102 | static int anfdmax; |
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103 | |
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104 | static int *fdchanges; |
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105 | static int fdchangemax, fdchangecnt; |
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106 | |
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107 | static void |
346 | static void |
108 | anfds_init (ANFD *base, int count) |
347 | anfds_init (ANFD *base, int count) |
109 | { |
348 | { |
110 | while (count--) |
349 | while (count--) |
111 | { |
350 | { |
112 | base->head = 0; |
351 | base->head = 0; |
113 | base->wev = base->rev = EV_NONE; |
352 | base->events = EV_NONE; |
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353 | base->reify = 0; |
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354 | |
114 | ++base; |
355 | ++base; |
115 | } |
356 | } |
116 | } |
357 | } |
117 | |
358 | |
118 | typedef struct |
359 | void |
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360 | ev_feed_event (EV_P_ void *w, int revents) |
119 | { |
361 | { |
120 | W w; |
362 | W w_ = (W)w; |
121 | int events; |
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122 | } ANPENDING; |
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123 | |
363 | |
124 | static ANPENDING *pendings; |
364 | if (w_->pending) |
125 | static int pendingmax, pendingcnt; |
365 | { |
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366 | pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; |
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367 | return; |
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368 | } |
126 | |
369 | |
127 | static void |
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128 | event (W w, int events) |
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129 | { |
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130 | w->pending = ++pendingcnt; |
370 | w_->pending = ++pendingcnt [ABSPRI (w_)]; |
131 | array_needsize (pendings, pendingmax, pendingcnt, ); |
371 | array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2); |
132 | pendings [pendingcnt - 1].w = w; |
372 | pendings [ABSPRI (w_)][w_->pending - 1].w = w_; |
133 | pendings [pendingcnt - 1].events = events; |
373 | pendings [ABSPRI (w_)][w_->pending - 1].events = revents; |
134 | } |
374 | } |
135 | |
375 | |
136 | static void |
376 | static void |
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377 | queue_events (EV_P_ W *events, int eventcnt, int type) |
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378 | { |
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379 | int i; |
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380 | |
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381 | for (i = 0; i < eventcnt; ++i) |
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382 | ev_feed_event (EV_A_ events [i], type); |
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383 | } |
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384 | |
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385 | inline void |
137 | fd_event (int fd, int events) |
386 | fd_event (EV_P_ int fd, int revents) |
138 | { |
387 | { |
139 | ANFD *anfd = anfds + fd; |
388 | ANFD *anfd = anfds + fd; |
140 | struct ev_io *w; |
389 | struct ev_io *w; |
141 | |
390 | |
142 | for (w = anfd->head; w; w = w->next) |
391 | for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) |
143 | { |
392 | { |
144 | int ev = w->events & events; |
393 | int ev = w->events & revents; |
145 | |
394 | |
146 | if (ev) |
395 | if (ev) |
147 | event ((W)w, ev); |
396 | ev_feed_event (EV_A_ (W)w, ev); |
148 | } |
397 | } |
149 | } |
398 | } |
150 | |
399 | |
151 | static void |
400 | void |
152 | queue_events (W *events, int eventcnt, int type) |
401 | ev_feed_fd_event (EV_P_ int fd, int revents) |
153 | { |
402 | { |
154 | int i; |
403 | fd_event (EV_A_ fd, revents); |
155 | |
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156 | for (i = 0; i < eventcnt; ++i) |
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157 | event (events [i], type); |
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158 | } |
404 | } |
159 | |
405 | |
160 | /*****************************************************************************/ |
406 | /*****************************************************************************/ |
161 | |
407 | |
162 | static struct ev_timer **timers; |
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163 | static int timermax, timercnt; |
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|
164 | |
|
|
165 | static struct ev_periodic **periodics; |
|
|
166 | static int periodicmax, periodiccnt; |
|
|
167 | |
|
|
168 | static void |
408 | static void |
169 | upheap (WT *timers, int k) |
409 | fd_reify (EV_P) |
170 | { |
|
|
171 | WT w = timers [k]; |
|
|
172 | |
|
|
173 | while (k && timers [k >> 1]->at > w->at) |
|
|
174 | { |
|
|
175 | timers [k] = timers [k >> 1]; |
|
|
176 | timers [k]->active = k + 1; |
|
|
177 | k >>= 1; |
|
|
178 | } |
|
|
179 | |
|
|
180 | timers [k] = w; |
|
|
181 | timers [k]->active = k + 1; |
|
|
182 | |
|
|
183 | } |
|
|
184 | |
|
|
185 | static void |
|
|
186 | downheap (WT *timers, int N, int k) |
|
|
187 | { |
|
|
188 | WT w = timers [k]; |
|
|
189 | |
|
|
190 | while (k < (N >> 1)) |
|
|
191 | { |
|
|
192 | int j = k << 1; |
|
|
193 | |
|
|
194 | if (j + 1 < N && timers [j]->at > timers [j + 1]->at) |
|
|
195 | ++j; |
|
|
196 | |
|
|
197 | if (w->at <= timers [j]->at) |
|
|
198 | break; |
|
|
199 | |
|
|
200 | timers [k] = timers [j]; |
|
|
201 | timers [k]->active = k + 1; |
|
|
202 | k = j; |
|
|
203 | } |
|
|
204 | |
|
|
205 | timers [k] = w; |
|
|
206 | timers [k]->active = k + 1; |
|
|
207 | } |
|
|
208 | |
|
|
209 | /*****************************************************************************/ |
|
|
210 | |
|
|
211 | typedef struct |
|
|
212 | { |
|
|
213 | struct ev_signal *head; |
|
|
214 | sig_atomic_t gotsig; |
|
|
215 | } ANSIG; |
|
|
216 | |
|
|
217 | static ANSIG *signals; |
|
|
218 | static int signalmax; |
|
|
219 | |
|
|
220 | static int sigpipe [2]; |
|
|
221 | static sig_atomic_t gotsig; |
|
|
222 | static struct ev_io sigev; |
|
|
223 | |
|
|
224 | static void |
|
|
225 | signals_init (ANSIG *base, int count) |
|
|
226 | { |
|
|
227 | while (count--) |
|
|
228 | { |
|
|
229 | base->head = 0; |
|
|
230 | base->gotsig = 0; |
|
|
231 | ++base; |
|
|
232 | } |
|
|
233 | } |
|
|
234 | |
|
|
235 | static void |
|
|
236 | sighandler (int signum) |
|
|
237 | { |
|
|
238 | signals [signum - 1].gotsig = 1; |
|
|
239 | |
|
|
240 | if (!gotsig) |
|
|
241 | { |
|
|
242 | gotsig = 1; |
|
|
243 | write (sigpipe [1], &gotsig, 1); |
|
|
244 | } |
|
|
245 | } |
|
|
246 | |
|
|
247 | static void |
|
|
248 | sigcb (struct ev_io *iow, int revents) |
|
|
249 | { |
|
|
250 | struct ev_signal *w; |
|
|
251 | int sig; |
|
|
252 | |
|
|
253 | gotsig = 0; |
|
|
254 | read (sigpipe [0], &revents, 1); |
|
|
255 | |
|
|
256 | for (sig = signalmax; sig--; ) |
|
|
257 | if (signals [sig].gotsig) |
|
|
258 | { |
|
|
259 | signals [sig].gotsig = 0; |
|
|
260 | |
|
|
261 | for (w = signals [sig].head; w; w = w->next) |
|
|
262 | event ((W)w, EV_SIGNAL); |
|
|
263 | } |
|
|
264 | } |
|
|
265 | |
|
|
266 | static void |
|
|
267 | siginit (void) |
|
|
268 | { |
|
|
269 | fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); |
|
|
270 | fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC); |
|
|
271 | |
|
|
272 | /* rather than sort out wether we really need nb, set it */ |
|
|
273 | fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); |
|
|
274 | fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); |
|
|
275 | |
|
|
276 | evio_set (&sigev, sigpipe [0], EV_READ); |
|
|
277 | evio_start (&sigev); |
|
|
278 | } |
|
|
279 | |
|
|
280 | /*****************************************************************************/ |
|
|
281 | |
|
|
282 | static struct ev_idle **idles; |
|
|
283 | static int idlemax, idlecnt; |
|
|
284 | |
|
|
285 | static struct ev_check **checks; |
|
|
286 | static int checkmax, checkcnt; |
|
|
287 | |
|
|
288 | /*****************************************************************************/ |
|
|
289 | |
|
|
290 | #if HAVE_EPOLL |
|
|
291 | # include "ev_epoll.c" |
|
|
292 | #endif |
|
|
293 | #if HAVE_SELECT |
|
|
294 | # include "ev_select.c" |
|
|
295 | #endif |
|
|
296 | |
|
|
297 | int ev_init (int flags) |
|
|
298 | { |
|
|
299 | #if HAVE_MONOTONIC |
|
|
300 | { |
|
|
301 | struct timespec ts; |
|
|
302 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
|
|
303 | have_monotonic = 1; |
|
|
304 | } |
|
|
305 | #endif |
|
|
306 | |
|
|
307 | ev_now = ev_time (); |
|
|
308 | now = get_clock (); |
|
|
309 | diff = ev_now - now; |
|
|
310 | |
|
|
311 | if (pipe (sigpipe)) |
|
|
312 | return 0; |
|
|
313 | |
|
|
314 | ev_method = EVMETHOD_NONE; |
|
|
315 | #if HAVE_EPOLL |
|
|
316 | if (ev_method == EVMETHOD_NONE) epoll_init (flags); |
|
|
317 | #endif |
|
|
318 | #if HAVE_SELECT |
|
|
319 | if (ev_method == EVMETHOD_NONE) select_init (flags); |
|
|
320 | #endif |
|
|
321 | |
|
|
322 | if (ev_method) |
|
|
323 | { |
|
|
324 | evw_init (&sigev, sigcb); |
|
|
325 | siginit (); |
|
|
326 | } |
|
|
327 | |
|
|
328 | return ev_method; |
|
|
329 | } |
|
|
330 | |
|
|
331 | /*****************************************************************************/ |
|
|
332 | |
|
|
333 | void ev_prefork (void) |
|
|
334 | { |
|
|
335 | /* nop */ |
|
|
336 | } |
|
|
337 | |
|
|
338 | void ev_postfork_parent (void) |
|
|
339 | { |
|
|
340 | /* nop */ |
|
|
341 | } |
|
|
342 | |
|
|
343 | void ev_postfork_child (void) |
|
|
344 | { |
|
|
345 | #if HAVE_EPOLL |
|
|
346 | if (ev_method == EVMETHOD_EPOLL) |
|
|
347 | epoll_postfork_child (); |
|
|
348 | #endif |
|
|
349 | |
|
|
350 | evio_stop (&sigev); |
|
|
351 | close (sigpipe [0]); |
|
|
352 | close (sigpipe [1]); |
|
|
353 | pipe (sigpipe); |
|
|
354 | siginit (); |
|
|
355 | } |
|
|
356 | |
|
|
357 | /*****************************************************************************/ |
|
|
358 | |
|
|
359 | static void |
|
|
360 | fd_reify (void) |
|
|
361 | { |
410 | { |
362 | int i; |
411 | int i; |
363 | |
412 | |
364 | for (i = 0; i < fdchangecnt; ++i) |
413 | for (i = 0; i < fdchangecnt; ++i) |
365 | { |
414 | { |
366 | int fd = fdchanges [i]; |
415 | int fd = fdchanges [i]; |
367 | ANFD *anfd = anfds + fd; |
416 | ANFD *anfd = anfds + fd; |
368 | struct ev_io *w; |
417 | struct ev_io *w; |
369 | |
418 | |
370 | int wev = 0; |
419 | int events = 0; |
371 | |
420 | |
372 | for (w = anfd->head; w; w = w->next) |
421 | for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) |
373 | wev |= w->events; |
422 | events |= w->events; |
374 | |
423 | |
375 | if (anfd->wev != wev) |
424 | #if EV_SELECT_IS_WINSOCKET |
|
|
425 | if (events) |
376 | { |
426 | { |
377 | method_modify (fd, anfd->wev, wev); |
427 | unsigned long argp; |
378 | anfd->wev = wev; |
428 | anfd->handle = _get_osfhandle (fd); |
|
|
429 | assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); |
379 | } |
430 | } |
|
|
431 | #endif |
|
|
432 | |
|
|
433 | anfd->reify = 0; |
|
|
434 | |
|
|
435 | method_modify (EV_A_ fd, anfd->events, events); |
|
|
436 | anfd->events = events; |
380 | } |
437 | } |
381 | |
438 | |
382 | fdchangecnt = 0; |
439 | fdchangecnt = 0; |
383 | } |
440 | } |
384 | |
441 | |
385 | static void |
442 | static void |
386 | call_pending () |
443 | fd_change (EV_P_ int fd) |
|
|
444 | { |
|
|
445 | if (anfds [fd].reify) |
|
|
446 | return; |
|
|
447 | |
|
|
448 | anfds [fd].reify = 1; |
|
|
449 | |
|
|
450 | ++fdchangecnt; |
|
|
451 | array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); |
|
|
452 | fdchanges [fdchangecnt - 1] = fd; |
|
|
453 | } |
|
|
454 | |
|
|
455 | static void |
|
|
456 | fd_kill (EV_P_ int fd) |
|
|
457 | { |
|
|
458 | struct ev_io *w; |
|
|
459 | |
|
|
460 | while ((w = (struct ev_io *)anfds [fd].head)) |
|
|
461 | { |
|
|
462 | ev_io_stop (EV_A_ w); |
|
|
463 | ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
|
|
464 | } |
|
|
465 | } |
|
|
466 | |
|
|
467 | static int |
|
|
468 | fd_valid (int fd) |
|
|
469 | { |
|
|
470 | #ifdef _WIN32 |
|
|
471 | return _get_osfhandle (fd) != -1; |
|
|
472 | #else |
|
|
473 | return fcntl (fd, F_GETFD) != -1; |
|
|
474 | #endif |
|
|
475 | } |
|
|
476 | |
|
|
477 | /* called on EBADF to verify fds */ |
|
|
478 | static void |
|
|
479 | fd_ebadf (EV_P) |
|
|
480 | { |
|
|
481 | int fd; |
|
|
482 | |
|
|
483 | for (fd = 0; fd < anfdmax; ++fd) |
|
|
484 | if (anfds [fd].events) |
|
|
485 | if (!fd_valid (fd) == -1 && errno == EBADF) |
|
|
486 | fd_kill (EV_A_ fd); |
|
|
487 | } |
|
|
488 | |
|
|
489 | /* called on ENOMEM in select/poll to kill some fds and retry */ |
|
|
490 | static void |
|
|
491 | fd_enomem (EV_P) |
|
|
492 | { |
|
|
493 | int fd; |
|
|
494 | |
|
|
495 | for (fd = anfdmax; fd--; ) |
|
|
496 | if (anfds [fd].events) |
|
|
497 | { |
|
|
498 | fd_kill (EV_A_ fd); |
|
|
499 | return; |
|
|
500 | } |
|
|
501 | } |
|
|
502 | |
|
|
503 | /* usually called after fork if method needs to re-arm all fds from scratch */ |
|
|
504 | static void |
|
|
505 | fd_rearm_all (EV_P) |
|
|
506 | { |
|
|
507 | int fd; |
|
|
508 | |
|
|
509 | /* this should be highly optimised to not do anything but set a flag */ |
|
|
510 | for (fd = 0; fd < anfdmax; ++fd) |
|
|
511 | if (anfds [fd].events) |
|
|
512 | { |
|
|
513 | anfds [fd].events = 0; |
|
|
514 | fd_change (EV_A_ fd); |
|
|
515 | } |
|
|
516 | } |
|
|
517 | |
|
|
518 | /*****************************************************************************/ |
|
|
519 | |
|
|
520 | static void |
|
|
521 | upheap (WT *heap, int k) |
|
|
522 | { |
|
|
523 | WT w = heap [k]; |
|
|
524 | |
|
|
525 | while (k && heap [k >> 1]->at > w->at) |
|
|
526 | { |
|
|
527 | heap [k] = heap [k >> 1]; |
|
|
528 | ((W)heap [k])->active = k + 1; |
|
|
529 | k >>= 1; |
|
|
530 | } |
|
|
531 | |
|
|
532 | heap [k] = w; |
|
|
533 | ((W)heap [k])->active = k + 1; |
|
|
534 | |
|
|
535 | } |
|
|
536 | |
|
|
537 | static void |
|
|
538 | downheap (WT *heap, int N, int k) |
|
|
539 | { |
|
|
540 | WT w = heap [k]; |
|
|
541 | |
|
|
542 | while (k < (N >> 1)) |
|
|
543 | { |
|
|
544 | int j = k << 1; |
|
|
545 | |
|
|
546 | if (j + 1 < N && heap [j]->at > heap [j + 1]->at) |
|
|
547 | ++j; |
|
|
548 | |
|
|
549 | if (w->at <= heap [j]->at) |
|
|
550 | break; |
|
|
551 | |
|
|
552 | heap [k] = heap [j]; |
|
|
553 | ((W)heap [k])->active = k + 1; |
|
|
554 | k = j; |
|
|
555 | } |
|
|
556 | |
|
|
557 | heap [k] = w; |
|
|
558 | ((W)heap [k])->active = k + 1; |
|
|
559 | } |
|
|
560 | |
|
|
561 | inline void |
|
|
562 | adjustheap (WT *heap, int N, int k) |
|
|
563 | { |
|
|
564 | upheap (heap, k); |
|
|
565 | downheap (heap, N, k); |
|
|
566 | } |
|
|
567 | |
|
|
568 | /*****************************************************************************/ |
|
|
569 | |
|
|
570 | typedef struct |
|
|
571 | { |
|
|
572 | WL head; |
|
|
573 | sig_atomic_t volatile gotsig; |
|
|
574 | } ANSIG; |
|
|
575 | |
|
|
576 | static ANSIG *signals; |
|
|
577 | static int signalmax; |
|
|
578 | |
|
|
579 | static int sigpipe [2]; |
|
|
580 | static sig_atomic_t volatile gotsig; |
|
|
581 | static struct ev_io sigev; |
|
|
582 | |
|
|
583 | static void |
|
|
584 | signals_init (ANSIG *base, int count) |
|
|
585 | { |
|
|
586 | while (count--) |
|
|
587 | { |
|
|
588 | base->head = 0; |
|
|
589 | base->gotsig = 0; |
|
|
590 | |
|
|
591 | ++base; |
|
|
592 | } |
|
|
593 | } |
|
|
594 | |
|
|
595 | static void |
|
|
596 | sighandler (int signum) |
|
|
597 | { |
|
|
598 | #if _WIN32 |
|
|
599 | signal (signum, sighandler); |
|
|
600 | #endif |
|
|
601 | |
|
|
602 | signals [signum - 1].gotsig = 1; |
|
|
603 | |
|
|
604 | if (!gotsig) |
|
|
605 | { |
|
|
606 | int old_errno = errno; |
|
|
607 | gotsig = 1; |
|
|
608 | write (sigpipe [1], &signum, 1); |
|
|
609 | errno = old_errno; |
|
|
610 | } |
|
|
611 | } |
|
|
612 | |
|
|
613 | void |
|
|
614 | ev_feed_signal_event (EV_P_ int signum) |
|
|
615 | { |
|
|
616 | WL w; |
|
|
617 | |
|
|
618 | #if EV_MULTIPLICITY |
|
|
619 | assert (("feeding signal events is only supported in the default loop", loop == default_loop)); |
|
|
620 | #endif |
|
|
621 | |
|
|
622 | --signum; |
|
|
623 | |
|
|
624 | if (signum < 0 || signum >= signalmax) |
|
|
625 | return; |
|
|
626 | |
|
|
627 | signals [signum].gotsig = 0; |
|
|
628 | |
|
|
629 | for (w = signals [signum].head; w; w = w->next) |
|
|
630 | ev_feed_event (EV_A_ (W)w, EV_SIGNAL); |
|
|
631 | } |
|
|
632 | |
|
|
633 | static void |
|
|
634 | sigcb (EV_P_ struct ev_io *iow, int revents) |
|
|
635 | { |
|
|
636 | int signum; |
|
|
637 | |
|
|
638 | read (sigpipe [0], &revents, 1); |
|
|
639 | gotsig = 0; |
|
|
640 | |
|
|
641 | for (signum = signalmax; signum--; ) |
|
|
642 | if (signals [signum].gotsig) |
|
|
643 | ev_feed_signal_event (EV_A_ signum + 1); |
|
|
644 | } |
|
|
645 | |
|
|
646 | inline void |
|
|
647 | fd_intern (int fd) |
|
|
648 | { |
|
|
649 | #ifdef _WIN32 |
|
|
650 | int arg = 1; |
|
|
651 | ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); |
|
|
652 | #else |
|
|
653 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
|
|
654 | fcntl (fd, F_SETFL, O_NONBLOCK); |
|
|
655 | #endif |
|
|
656 | } |
|
|
657 | |
|
|
658 | static void |
|
|
659 | siginit (EV_P) |
|
|
660 | { |
|
|
661 | fd_intern (sigpipe [0]); |
|
|
662 | fd_intern (sigpipe [1]); |
|
|
663 | |
|
|
664 | ev_io_set (&sigev, sigpipe [0], EV_READ); |
|
|
665 | ev_io_start (EV_A_ &sigev); |
|
|
666 | ev_unref (EV_A); /* child watcher should not keep loop alive */ |
|
|
667 | } |
|
|
668 | |
|
|
669 | /*****************************************************************************/ |
|
|
670 | |
|
|
671 | static struct ev_child *childs [PID_HASHSIZE]; |
|
|
672 | |
|
|
673 | #ifndef _WIN32 |
|
|
674 | |
|
|
675 | static struct ev_signal childev; |
|
|
676 | |
|
|
677 | #ifndef WCONTINUED |
|
|
678 | # define WCONTINUED 0 |
|
|
679 | #endif |
|
|
680 | |
|
|
681 | static void |
|
|
682 | child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status) |
|
|
683 | { |
|
|
684 | struct ev_child *w; |
|
|
685 | |
|
|
686 | for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next) |
|
|
687 | if (w->pid == pid || !w->pid) |
|
|
688 | { |
|
|
689 | ev_priority (w) = ev_priority (sw); /* need to do it *now* */ |
|
|
690 | w->rpid = pid; |
|
|
691 | w->rstatus = status; |
|
|
692 | ev_feed_event (EV_A_ (W)w, EV_CHILD); |
|
|
693 | } |
|
|
694 | } |
|
|
695 | |
|
|
696 | static void |
|
|
697 | childcb (EV_P_ struct ev_signal *sw, int revents) |
|
|
698 | { |
|
|
699 | int pid, status; |
|
|
700 | |
|
|
701 | if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
|
|
702 | { |
|
|
703 | /* make sure we are called again until all childs have been reaped */ |
|
|
704 | ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); |
|
|
705 | |
|
|
706 | child_reap (EV_A_ sw, pid, pid, status); |
|
|
707 | child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ |
|
|
708 | } |
|
|
709 | } |
|
|
710 | |
|
|
711 | #endif |
|
|
712 | |
|
|
713 | /*****************************************************************************/ |
|
|
714 | |
|
|
715 | #if EV_USE_KQUEUE |
|
|
716 | # include "ev_kqueue.c" |
|
|
717 | #endif |
|
|
718 | #if EV_USE_EPOLL |
|
|
719 | # include "ev_epoll.c" |
|
|
720 | #endif |
|
|
721 | #if EV_USE_POLL |
|
|
722 | # include "ev_poll.c" |
|
|
723 | #endif |
|
|
724 | #if EV_USE_SELECT |
|
|
725 | # include "ev_select.c" |
|
|
726 | #endif |
|
|
727 | |
|
|
728 | int |
|
|
729 | ev_version_major (void) |
|
|
730 | { |
|
|
731 | return EV_VERSION_MAJOR; |
|
|
732 | } |
|
|
733 | |
|
|
734 | int |
|
|
735 | ev_version_minor (void) |
|
|
736 | { |
|
|
737 | return EV_VERSION_MINOR; |
|
|
738 | } |
|
|
739 | |
|
|
740 | /* return true if we are running with elevated privileges and should ignore env variables */ |
|
|
741 | static int |
|
|
742 | enable_secure (void) |
|
|
743 | { |
|
|
744 | #ifdef _WIN32 |
|
|
745 | return 0; |
|
|
746 | #else |
|
|
747 | return getuid () != geteuid () |
|
|
748 | || getgid () != getegid (); |
|
|
749 | #endif |
|
|
750 | } |
|
|
751 | |
|
|
752 | unsigned int |
|
|
753 | ev_method (EV_P) |
|
|
754 | { |
|
|
755 | return method; |
|
|
756 | } |
|
|
757 | |
|
|
758 | static void |
|
|
759 | loop_init (EV_P_ unsigned int flags) |
|
|
760 | { |
|
|
761 | if (!method) |
|
|
762 | { |
|
|
763 | #if EV_USE_MONOTONIC |
|
|
764 | { |
|
|
765 | struct timespec ts; |
|
|
766 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
|
|
767 | have_monotonic = 1; |
|
|
768 | } |
|
|
769 | #endif |
|
|
770 | |
|
|
771 | ev_rt_now = ev_time (); |
|
|
772 | mn_now = get_clock (); |
|
|
773 | now_floor = mn_now; |
|
|
774 | rtmn_diff = ev_rt_now - mn_now; |
|
|
775 | |
|
|
776 | if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) |
|
|
777 | flags = atoi (getenv ("LIBEV_FLAGS")); |
|
|
778 | |
|
|
779 | if (!(flags & 0x0000ffff)) |
|
|
780 | flags |= 0x0000ffff; |
|
|
781 | |
|
|
782 | method = 0; |
|
|
783 | #if EV_USE_KQUEUE |
|
|
784 | if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags); |
|
|
785 | #endif |
|
|
786 | #if EV_USE_EPOLL |
|
|
787 | if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags); |
|
|
788 | #endif |
|
|
789 | #if EV_USE_POLL |
|
|
790 | if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags); |
|
|
791 | #endif |
|
|
792 | #if EV_USE_SELECT |
|
|
793 | if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags); |
|
|
794 | #endif |
|
|
795 | |
|
|
796 | ev_init (&sigev, sigcb); |
|
|
797 | ev_set_priority (&sigev, EV_MAXPRI); |
|
|
798 | } |
|
|
799 | } |
|
|
800 | |
|
|
801 | void |
|
|
802 | loop_destroy (EV_P) |
387 | { |
803 | { |
388 | int i; |
804 | int i; |
389 | |
805 | |
390 | for (i = 0; i < pendingcnt; ++i) |
806 | #if EV_USE_KQUEUE |
|
|
807 | if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); |
|
|
808 | #endif |
|
|
809 | #if EV_USE_EPOLL |
|
|
810 | if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); |
|
|
811 | #endif |
|
|
812 | #if EV_USE_POLL |
|
|
813 | if (method == EVMETHOD_POLL ) poll_destroy (EV_A); |
|
|
814 | #endif |
|
|
815 | #if EV_USE_SELECT |
|
|
816 | if (method == EVMETHOD_SELECT) select_destroy (EV_A); |
|
|
817 | #endif |
|
|
818 | |
|
|
819 | for (i = NUMPRI; i--; ) |
|
|
820 | array_free (pending, [i]); |
|
|
821 | |
|
|
822 | /* have to use the microsoft-never-gets-it-right macro */ |
|
|
823 | array_free (fdchange, EMPTY0); |
|
|
824 | array_free (timer, EMPTY0); |
|
|
825 | #if EV_PERIODICS |
|
|
826 | array_free (periodic, EMPTY0); |
|
|
827 | #endif |
|
|
828 | array_free (idle, EMPTY0); |
|
|
829 | array_free (prepare, EMPTY0); |
|
|
830 | array_free (check, EMPTY0); |
|
|
831 | |
|
|
832 | method = 0; |
|
|
833 | } |
|
|
834 | |
|
|
835 | static void |
|
|
836 | loop_fork (EV_P) |
|
|
837 | { |
|
|
838 | #if EV_USE_EPOLL |
|
|
839 | if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); |
|
|
840 | #endif |
|
|
841 | #if EV_USE_KQUEUE |
|
|
842 | if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); |
|
|
843 | #endif |
|
|
844 | |
|
|
845 | if (ev_is_active (&sigev)) |
|
|
846 | { |
|
|
847 | /* default loop */ |
|
|
848 | |
|
|
849 | ev_ref (EV_A); |
|
|
850 | ev_io_stop (EV_A_ &sigev); |
|
|
851 | close (sigpipe [0]); |
|
|
852 | close (sigpipe [1]); |
|
|
853 | |
|
|
854 | while (pipe (sigpipe)) |
|
|
855 | syserr ("(libev) error creating pipe"); |
|
|
856 | |
|
|
857 | siginit (EV_A); |
391 | { |
858 | } |
392 | ANPENDING *p = pendings + i; |
|
|
393 | |
859 | |
394 | if (p->w) |
860 | postfork = 0; |
|
|
861 | } |
|
|
862 | |
|
|
863 | #if EV_MULTIPLICITY |
|
|
864 | struct ev_loop * |
|
|
865 | ev_loop_new (unsigned int flags) |
|
|
866 | { |
|
|
867 | struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); |
|
|
868 | |
|
|
869 | memset (loop, 0, sizeof (struct ev_loop)); |
|
|
870 | |
|
|
871 | loop_init (EV_A_ flags); |
|
|
872 | |
|
|
873 | if (ev_method (EV_A)) |
|
|
874 | return loop; |
|
|
875 | |
|
|
876 | return 0; |
|
|
877 | } |
|
|
878 | |
|
|
879 | void |
|
|
880 | ev_loop_destroy (EV_P) |
|
|
881 | { |
|
|
882 | loop_destroy (EV_A); |
|
|
883 | ev_free (loop); |
|
|
884 | } |
|
|
885 | |
|
|
886 | void |
|
|
887 | ev_loop_fork (EV_P) |
|
|
888 | { |
|
|
889 | postfork = 1; |
|
|
890 | } |
|
|
891 | |
|
|
892 | #endif |
|
|
893 | |
|
|
894 | #if EV_MULTIPLICITY |
|
|
895 | struct ev_loop * |
|
|
896 | #else |
|
|
897 | int |
|
|
898 | #endif |
|
|
899 | ev_default_loop (unsigned int flags) |
|
|
900 | { |
|
|
901 | if (sigpipe [0] == sigpipe [1]) |
|
|
902 | if (pipe (sigpipe)) |
|
|
903 | return 0; |
|
|
904 | |
|
|
905 | if (!default_loop) |
|
|
906 | { |
|
|
907 | #if EV_MULTIPLICITY |
|
|
908 | struct ev_loop *loop = default_loop = &default_loop_struct; |
|
|
909 | #else |
|
|
910 | default_loop = 1; |
|
|
911 | #endif |
|
|
912 | |
|
|
913 | loop_init (EV_A_ flags); |
|
|
914 | |
|
|
915 | if (ev_method (EV_A)) |
395 | { |
916 | { |
396 | p->w->pending = 0; |
917 | siginit (EV_A); |
397 | p->w->cb (p->w, p->events); |
918 | |
|
|
919 | #ifndef _WIN32 |
|
|
920 | ev_signal_init (&childev, childcb, SIGCHLD); |
|
|
921 | ev_set_priority (&childev, EV_MAXPRI); |
|
|
922 | ev_signal_start (EV_A_ &childev); |
|
|
923 | ev_unref (EV_A); /* child watcher should not keep loop alive */ |
|
|
924 | #endif |
398 | } |
925 | } |
|
|
926 | else |
|
|
927 | default_loop = 0; |
|
|
928 | } |
|
|
929 | |
|
|
930 | return default_loop; |
|
|
931 | } |
|
|
932 | |
|
|
933 | void |
|
|
934 | ev_default_destroy (void) |
|
|
935 | { |
|
|
936 | #if EV_MULTIPLICITY |
|
|
937 | struct ev_loop *loop = default_loop; |
|
|
938 | #endif |
|
|
939 | |
|
|
940 | #ifndef _WIN32 |
|
|
941 | ev_ref (EV_A); /* child watcher */ |
|
|
942 | ev_signal_stop (EV_A_ &childev); |
|
|
943 | #endif |
|
|
944 | |
|
|
945 | ev_ref (EV_A); /* signal watcher */ |
|
|
946 | ev_io_stop (EV_A_ &sigev); |
|
|
947 | |
|
|
948 | close (sigpipe [0]); sigpipe [0] = 0; |
|
|
949 | close (sigpipe [1]); sigpipe [1] = 0; |
|
|
950 | |
|
|
951 | loop_destroy (EV_A); |
|
|
952 | } |
|
|
953 | |
|
|
954 | void |
|
|
955 | ev_default_fork (void) |
|
|
956 | { |
|
|
957 | #if EV_MULTIPLICITY |
|
|
958 | struct ev_loop *loop = default_loop; |
|
|
959 | #endif |
|
|
960 | |
|
|
961 | if (method) |
|
|
962 | postfork = 1; |
|
|
963 | } |
|
|
964 | |
|
|
965 | /*****************************************************************************/ |
|
|
966 | |
|
|
967 | static int |
|
|
968 | any_pending (EV_P) |
|
|
969 | { |
|
|
970 | int pri; |
|
|
971 | |
|
|
972 | for (pri = NUMPRI; pri--; ) |
|
|
973 | if (pendingcnt [pri]) |
|
|
974 | return 1; |
|
|
975 | |
|
|
976 | return 0; |
|
|
977 | } |
|
|
978 | |
|
|
979 | static void |
|
|
980 | call_pending (EV_P) |
|
|
981 | { |
|
|
982 | int pri; |
|
|
983 | |
|
|
984 | for (pri = NUMPRI; pri--; ) |
|
|
985 | while (pendingcnt [pri]) |
|
|
986 | { |
|
|
987 | ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
|
|
988 | |
|
|
989 | if (p->w) |
|
|
990 | { |
|
|
991 | p->w->pending = 0; |
|
|
992 | EV_CB_INVOKE (p->w, p->events); |
|
|
993 | } |
399 | } |
994 | } |
400 | |
|
|
401 | pendingcnt = 0; |
|
|
402 | } |
995 | } |
403 | |
996 | |
404 | static void |
997 | static void |
405 | timers_reify () |
998 | timers_reify (EV_P) |
406 | { |
999 | { |
407 | while (timercnt && timers [0]->at <= now) |
1000 | while (timercnt && ((WT)timers [0])->at <= mn_now) |
408 | { |
1001 | { |
409 | struct ev_timer *w = timers [0]; |
1002 | struct ev_timer *w = timers [0]; |
|
|
1003 | |
|
|
1004 | assert (("inactive timer on timer heap detected", ev_is_active (w))); |
410 | |
1005 | |
411 | /* first reschedule or stop timer */ |
1006 | /* first reschedule or stop timer */ |
412 | if (w->repeat) |
1007 | if (w->repeat) |
413 | { |
1008 | { |
|
|
1009 | assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
|
|
1010 | |
414 | w->at = now + w->repeat; |
1011 | ((WT)w)->at += w->repeat; |
415 | assert (("timer timeout in the past, negative repeat?", w->at > now)); |
1012 | if (((WT)w)->at < mn_now) |
|
|
1013 | ((WT)w)->at = mn_now; |
|
|
1014 | |
416 | downheap ((WT *)timers, timercnt, 0); |
1015 | downheap ((WT *)timers, timercnt, 0); |
417 | } |
1016 | } |
418 | else |
1017 | else |
419 | evtimer_stop (w); /* nonrepeating: stop timer */ |
1018 | ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
420 | |
1019 | |
421 | event ((W)w, EV_TIMEOUT); |
1020 | ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); |
422 | } |
1021 | } |
423 | } |
1022 | } |
424 | |
1023 | |
|
|
1024 | #if EV_PERIODICS |
425 | static void |
1025 | static void |
426 | periodics_reify () |
1026 | periodics_reify (EV_P) |
427 | { |
1027 | { |
428 | while (periodiccnt && periodics [0]->at <= ev_now) |
1028 | while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) |
429 | { |
1029 | { |
430 | struct ev_periodic *w = periodics [0]; |
1030 | struct ev_periodic *w = periodics [0]; |
431 | |
1031 | |
|
|
1032 | assert (("inactive timer on periodic heap detected", ev_is_active (w))); |
|
|
1033 | |
432 | /* first reschedule or stop timer */ |
1034 | /* first reschedule or stop timer */ |
433 | if (w->interval) |
1035 | if (w->reschedule_cb) |
434 | { |
1036 | { |
|
|
1037 | ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); |
|
|
1038 | assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); |
|
|
1039 | downheap ((WT *)periodics, periodiccnt, 0); |
|
|
1040 | } |
|
|
1041 | else if (w->interval) |
|
|
1042 | { |
435 | w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; |
1043 | ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; |
436 | assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); |
1044 | assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); |
437 | downheap ((WT *)periodics, periodiccnt, 0); |
1045 | downheap ((WT *)periodics, periodiccnt, 0); |
438 | } |
1046 | } |
439 | else |
1047 | else |
440 | evperiodic_stop (w); /* nonrepeating: stop timer */ |
1048 | ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
441 | |
1049 | |
442 | event ((W)w, EV_TIMEOUT); |
1050 | ev_feed_event (EV_A_ (W)w, EV_PERIODIC); |
443 | } |
1051 | } |
444 | } |
1052 | } |
445 | |
1053 | |
446 | static void |
1054 | static void |
447 | periodics_reschedule (ev_tstamp diff) |
1055 | periodics_reschedule (EV_P) |
448 | { |
1056 | { |
449 | int i; |
1057 | int i; |
450 | |
1058 | |
451 | /* adjust periodics after time jump */ |
1059 | /* adjust periodics after time jump */ |
452 | for (i = 0; i < periodiccnt; ++i) |
1060 | for (i = 0; i < periodiccnt; ++i) |
453 | { |
1061 | { |
454 | struct ev_periodic *w = periodics [i]; |
1062 | struct ev_periodic *w = periodics [i]; |
455 | |
1063 | |
|
|
1064 | if (w->reschedule_cb) |
|
|
1065 | ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); |
456 | if (w->interval) |
1066 | else if (w->interval) |
|
|
1067 | ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; |
|
|
1068 | } |
|
|
1069 | |
|
|
1070 | /* now rebuild the heap */ |
|
|
1071 | for (i = periodiccnt >> 1; i--; ) |
|
|
1072 | downheap ((WT *)periodics, periodiccnt, i); |
|
|
1073 | } |
|
|
1074 | #endif |
|
|
1075 | |
|
|
1076 | inline int |
|
|
1077 | time_update_monotonic (EV_P) |
|
|
1078 | { |
|
|
1079 | mn_now = get_clock (); |
|
|
1080 | |
|
|
1081 | if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
|
|
1082 | { |
|
|
1083 | ev_rt_now = rtmn_diff + mn_now; |
|
|
1084 | return 0; |
|
|
1085 | } |
|
|
1086 | else |
|
|
1087 | { |
|
|
1088 | now_floor = mn_now; |
|
|
1089 | ev_rt_now = ev_time (); |
|
|
1090 | return 1; |
|
|
1091 | } |
|
|
1092 | } |
|
|
1093 | |
|
|
1094 | static void |
|
|
1095 | time_update (EV_P) |
|
|
1096 | { |
|
|
1097 | int i; |
|
|
1098 | |
|
|
1099 | #if EV_USE_MONOTONIC |
|
|
1100 | if (expect_true (have_monotonic)) |
|
|
1101 | { |
|
|
1102 | if (time_update_monotonic (EV_A)) |
457 | { |
1103 | { |
458 | ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; |
1104 | ev_tstamp odiff = rtmn_diff; |
459 | |
1105 | |
460 | if (fabs (diff) >= 1e-4) |
1106 | for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
461 | { |
1107 | { |
462 | evperiodic_stop (w); |
1108 | rtmn_diff = ev_rt_now - mn_now; |
463 | evperiodic_start (w); |
|
|
464 | |
1109 | |
465 | i = 0; /* restart loop, inefficient, but time jumps should be rare */ |
1110 | if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) |
|
|
1111 | return; /* all is well */ |
|
|
1112 | |
|
|
1113 | ev_rt_now = ev_time (); |
|
|
1114 | mn_now = get_clock (); |
|
|
1115 | now_floor = mn_now; |
466 | } |
1116 | } |
|
|
1117 | |
|
|
1118 | # if EV_PERIODICS |
|
|
1119 | periodics_reschedule (EV_A); |
|
|
1120 | # endif |
|
|
1121 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
|
|
1122 | /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ |
467 | } |
1123 | } |
468 | } |
1124 | } |
469 | } |
1125 | else |
470 | |
1126 | #endif |
471 | static void |
1127 | { |
472 | time_update () |
|
|
473 | { |
|
|
474 | int i; |
|
|
475 | |
|
|
476 | ev_now = ev_time (); |
1128 | ev_rt_now = ev_time (); |
477 | |
1129 | |
478 | if (have_monotonic) |
1130 | if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) |
479 | { |
|
|
480 | ev_tstamp odiff = diff; |
|
|
481 | |
|
|
482 | for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
|
|
483 | { |
1131 | { |
484 | now = get_clock (); |
1132 | #if EV_PERIODICS |
485 | diff = ev_now - now; |
|
|
486 | |
|
|
487 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
|
|
488 | return; /* all is well */ |
|
|
489 | |
|
|
490 | ev_now = ev_time (); |
|
|
491 | } |
|
|
492 | |
|
|
493 | periodics_reschedule (diff - odiff); |
|
|
494 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
|
|
495 | } |
|
|
496 | else |
|
|
497 | { |
|
|
498 | if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) |
|
|
499 | { |
|
|
500 | periodics_reschedule (ev_now - now); |
1133 | periodics_reschedule (EV_A); |
|
|
1134 | #endif |
501 | |
1135 | |
502 | /* adjust timers. this is easy, as the offset is the same for all */ |
1136 | /* adjust timers. this is easy, as the offset is the same for all */ |
503 | for (i = 0; i < timercnt; ++i) |
1137 | for (i = 0; i < timercnt; ++i) |
504 | timers [i]->at += diff; |
1138 | ((WT)timers [i])->at += ev_rt_now - mn_now; |
505 | } |
1139 | } |
506 | |
1140 | |
507 | now = ev_now; |
1141 | mn_now = ev_rt_now; |
508 | } |
1142 | } |
509 | } |
1143 | } |
510 | |
1144 | |
511 | int ev_loop_done; |
1145 | void |
|
|
1146 | ev_ref (EV_P) |
|
|
1147 | { |
|
|
1148 | ++activecnt; |
|
|
1149 | } |
512 | |
1150 | |
|
|
1151 | void |
|
|
1152 | ev_unref (EV_P) |
|
|
1153 | { |
|
|
1154 | --activecnt; |
|
|
1155 | } |
|
|
1156 | |
|
|
1157 | static int loop_done; |
|
|
1158 | |
|
|
1159 | void |
513 | void ev_loop (int flags) |
1160 | ev_loop (EV_P_ int flags) |
514 | { |
1161 | { |
515 | double block; |
1162 | double block; |
516 | ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0; |
1163 | loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; |
517 | |
1164 | |
518 | if (checkcnt) |
1165 | while (activecnt) |
519 | { |
1166 | { |
520 | queue_events ((W *)checks, checkcnt, EV_CHECK); |
1167 | /* queue check watchers (and execute them) */ |
|
|
1168 | if (expect_false (preparecnt)) |
|
|
1169 | { |
|
|
1170 | queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
521 | call_pending (); |
1171 | call_pending (EV_A); |
522 | } |
1172 | } |
523 | |
1173 | |
524 | do |
1174 | /* we might have forked, so reify kernel state if necessary */ |
525 | { |
1175 | if (expect_false (postfork)) |
|
|
1176 | loop_fork (EV_A); |
|
|
1177 | |
526 | /* update fd-related kernel structures */ |
1178 | /* update fd-related kernel structures */ |
527 | fd_reify (); |
1179 | fd_reify (EV_A); |
528 | |
1180 | |
529 | /* calculate blocking time */ |
1181 | /* calculate blocking time */ |
530 | |
1182 | |
531 | /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ |
1183 | /* we only need this for !monotonic clock or timers, but as we basically |
|
|
1184 | always have timers, we just calculate it always */ |
|
|
1185 | #if EV_USE_MONOTONIC |
|
|
1186 | if (expect_true (have_monotonic)) |
|
|
1187 | time_update_monotonic (EV_A); |
|
|
1188 | else |
|
|
1189 | #endif |
|
|
1190 | { |
532 | ev_now = ev_time (); |
1191 | ev_rt_now = ev_time (); |
|
|
1192 | mn_now = ev_rt_now; |
|
|
1193 | } |
533 | |
1194 | |
534 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
1195 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
535 | block = 0.; |
1196 | block = 0.; |
536 | else |
1197 | else |
537 | { |
1198 | { |
538 | block = MAX_BLOCKTIME; |
1199 | block = MAX_BLOCKTIME; |
539 | |
1200 | |
540 | if (timercnt) |
1201 | if (timercnt) |
541 | { |
1202 | { |
542 | ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; |
1203 | ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; |
543 | if (block > to) block = to; |
1204 | if (block > to) block = to; |
544 | } |
1205 | } |
545 | |
1206 | |
|
|
1207 | #if EV_PERIODICS |
546 | if (periodiccnt) |
1208 | if (periodiccnt) |
547 | { |
1209 | { |
548 | ev_tstamp to = periodics [0]->at - ev_now + method_fudge; |
1210 | ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; |
549 | if (block > to) block = to; |
1211 | if (block > to) block = to; |
550 | } |
1212 | } |
|
|
1213 | #endif |
551 | |
1214 | |
552 | if (block < 0.) block = 0.; |
1215 | if (block < 0.) block = 0.; |
553 | } |
1216 | } |
554 | |
1217 | |
555 | method_poll (block); |
1218 | method_poll (EV_A_ block); |
556 | |
1219 | |
557 | /* update ev_now, do magic */ |
1220 | /* update ev_rt_now, do magic */ |
558 | time_update (); |
1221 | time_update (EV_A); |
559 | |
1222 | |
560 | /* queue pending timers and reschedule them */ |
1223 | /* queue pending timers and reschedule them */ |
|
|
1224 | timers_reify (EV_A); /* relative timers called last */ |
|
|
1225 | #if EV_PERIODICS |
561 | periodics_reify (); /* absolute timers first */ |
1226 | periodics_reify (EV_A); /* absolute timers called first */ |
562 | timers_reify (); /* relative timers second */ |
1227 | #endif |
563 | |
1228 | |
564 | /* queue idle watchers unless io or timers are pending */ |
1229 | /* queue idle watchers unless io or timers are pending */ |
565 | if (!pendingcnt) |
1230 | if (idlecnt && !any_pending (EV_A)) |
566 | queue_events ((W *)idles, idlecnt, EV_IDLE); |
1231 | queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); |
567 | |
1232 | |
568 | /* queue check and possibly idle watchers */ |
1233 | /* queue check watchers, to be executed first */ |
|
|
1234 | if (checkcnt) |
569 | queue_events ((W *)checks, checkcnt, EV_CHECK); |
1235 | queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
570 | |
1236 | |
571 | call_pending (); |
1237 | call_pending (EV_A); |
572 | } |
|
|
573 | while (!ev_loop_done); |
|
|
574 | |
1238 | |
|
|
1239 | if (loop_done) |
|
|
1240 | break; |
|
|
1241 | } |
|
|
1242 | |
575 | if (ev_loop_done != 2) |
1243 | if (loop_done != 2) |
576 | ev_loop_done = 0; |
1244 | loop_done = 0; |
|
|
1245 | } |
|
|
1246 | |
|
|
1247 | void |
|
|
1248 | ev_unloop (EV_P_ int how) |
|
|
1249 | { |
|
|
1250 | loop_done = how; |
577 | } |
1251 | } |
578 | |
1252 | |
579 | /*****************************************************************************/ |
1253 | /*****************************************************************************/ |
580 | |
1254 | |
581 | static void |
1255 | inline void |
582 | wlist_add (WL *head, WL elem) |
1256 | wlist_add (WL *head, WL elem) |
583 | { |
1257 | { |
584 | elem->next = *head; |
1258 | elem->next = *head; |
585 | *head = elem; |
1259 | *head = elem; |
586 | } |
1260 | } |
587 | |
1261 | |
588 | static void |
1262 | inline void |
589 | wlist_del (WL *head, WL elem) |
1263 | wlist_del (WL *head, WL elem) |
590 | { |
1264 | { |
591 | while (*head) |
1265 | while (*head) |
592 | { |
1266 | { |
593 | if (*head == elem) |
1267 | if (*head == elem) |
… | |
… | |
598 | |
1272 | |
599 | head = &(*head)->next; |
1273 | head = &(*head)->next; |
600 | } |
1274 | } |
601 | } |
1275 | } |
602 | |
1276 | |
603 | static void |
1277 | inline void |
|
|
1278 | ev_clear_pending (EV_P_ W w) |
|
|
1279 | { |
|
|
1280 | if (w->pending) |
|
|
1281 | { |
|
|
1282 | pendings [ABSPRI (w)][w->pending - 1].w = 0; |
|
|
1283 | w->pending = 0; |
|
|
1284 | } |
|
|
1285 | } |
|
|
1286 | |
|
|
1287 | inline void |
604 | ev_start (W w, int active) |
1288 | ev_start (EV_P_ W w, int active) |
605 | { |
1289 | { |
606 | w->pending = 0; |
1290 | if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; |
|
|
1291 | if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI; |
|
|
1292 | |
607 | w->active = active; |
1293 | w->active = active; |
|
|
1294 | ev_ref (EV_A); |
608 | } |
1295 | } |
609 | |
1296 | |
610 | static void |
1297 | inline void |
611 | ev_stop (W w) |
1298 | ev_stop (EV_P_ W w) |
612 | { |
1299 | { |
613 | if (w->pending) |
1300 | ev_unref (EV_A); |
614 | pendings [w->pending - 1].w = 0; |
|
|
615 | |
|
|
616 | w->active = 0; |
1301 | w->active = 0; |
617 | } |
1302 | } |
618 | |
1303 | |
619 | /*****************************************************************************/ |
1304 | /*****************************************************************************/ |
620 | |
1305 | |
621 | void |
1306 | void |
622 | evio_start (struct ev_io *w) |
1307 | ev_io_start (EV_P_ struct ev_io *w) |
623 | { |
1308 | { |
|
|
1309 | int fd = w->fd; |
|
|
1310 | |
624 | if (ev_is_active (w)) |
1311 | if (ev_is_active (w)) |
625 | return; |
1312 | return; |
626 | |
1313 | |
627 | int fd = w->fd; |
1314 | assert (("ev_io_start called with negative fd", fd >= 0)); |
628 | |
1315 | |
629 | ev_start ((W)w, 1); |
1316 | ev_start (EV_A_ (W)w, 1); |
630 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
1317 | array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); |
631 | wlist_add ((WL *)&anfds[fd].head, (WL)w); |
1318 | wlist_add ((WL *)&anfds[fd].head, (WL)w); |
632 | |
1319 | |
633 | ++fdchangecnt; |
1320 | fd_change (EV_A_ fd); |
634 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
|
|
635 | fdchanges [fdchangecnt - 1] = fd; |
|
|
636 | } |
1321 | } |
637 | |
1322 | |
638 | void |
1323 | void |
639 | evio_stop (struct ev_io *w) |
1324 | ev_io_stop (EV_P_ struct ev_io *w) |
640 | { |
1325 | { |
|
|
1326 | ev_clear_pending (EV_A_ (W)w); |
641 | if (!ev_is_active (w)) |
1327 | if (!ev_is_active (w)) |
642 | return; |
1328 | return; |
643 | |
1329 | |
|
|
1330 | assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); |
|
|
1331 | |
644 | wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
1332 | wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
645 | ev_stop ((W)w); |
1333 | ev_stop (EV_A_ (W)w); |
646 | |
1334 | |
647 | ++fdchangecnt; |
1335 | fd_change (EV_A_ w->fd); |
648 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
|
|
649 | fdchanges [fdchangecnt - 1] = w->fd; |
|
|
650 | } |
1336 | } |
651 | |
1337 | |
652 | |
|
|
653 | void |
1338 | void |
654 | evtimer_start (struct ev_timer *w) |
1339 | ev_timer_start (EV_P_ struct ev_timer *w) |
655 | { |
1340 | { |
656 | if (ev_is_active (w)) |
1341 | if (ev_is_active (w)) |
657 | return; |
1342 | return; |
658 | |
1343 | |
659 | w->at += now; |
1344 | ((WT)w)->at += mn_now; |
660 | |
1345 | |
661 | assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); |
1346 | assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
662 | |
1347 | |
663 | ev_start ((W)w, ++timercnt); |
1348 | ev_start (EV_A_ (W)w, ++timercnt); |
664 | array_needsize (timers, timermax, timercnt, ); |
1349 | array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2); |
665 | timers [timercnt - 1] = w; |
1350 | timers [timercnt - 1] = w; |
666 | upheap ((WT *)timers, timercnt - 1); |
1351 | upheap ((WT *)timers, timercnt - 1); |
667 | } |
|
|
668 | |
1352 | |
|
|
1353 | assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); |
|
|
1354 | } |
|
|
1355 | |
669 | void |
1356 | void |
670 | evtimer_stop (struct ev_timer *w) |
1357 | ev_timer_stop (EV_P_ struct ev_timer *w) |
671 | { |
1358 | { |
|
|
1359 | ev_clear_pending (EV_A_ (W)w); |
672 | if (!ev_is_active (w)) |
1360 | if (!ev_is_active (w)) |
673 | return; |
1361 | return; |
674 | |
1362 | |
|
|
1363 | assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); |
|
|
1364 | |
675 | if (w->active < timercnt--) |
1365 | if (((W)w)->active < timercnt--) |
676 | { |
1366 | { |
677 | timers [w->active - 1] = timers [timercnt]; |
1367 | timers [((W)w)->active - 1] = timers [timercnt]; |
678 | downheap ((WT *)timers, timercnt, w->active - 1); |
1368 | adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); |
679 | } |
1369 | } |
680 | |
1370 | |
681 | w->at = w->repeat; |
1371 | ((WT)w)->at -= mn_now; |
682 | |
1372 | |
683 | ev_stop ((W)w); |
1373 | ev_stop (EV_A_ (W)w); |
684 | } |
1374 | } |
685 | |
1375 | |
686 | void |
1376 | void |
687 | evtimer_again (struct ev_timer *w) |
1377 | ev_timer_again (EV_P_ struct ev_timer *w) |
688 | { |
1378 | { |
689 | if (ev_is_active (w)) |
1379 | if (ev_is_active (w)) |
690 | { |
1380 | { |
691 | if (w->repeat) |
1381 | if (w->repeat) |
692 | { |
1382 | { |
693 | w->at = now + w->repeat; |
1383 | ((WT)w)->at = mn_now + w->repeat; |
694 | downheap ((WT *)timers, timercnt, w->active - 1); |
1384 | adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); |
695 | } |
1385 | } |
696 | else |
1386 | else |
697 | evtimer_stop (w); |
1387 | ev_timer_stop (EV_A_ w); |
698 | } |
1388 | } |
699 | else if (w->repeat) |
1389 | else if (w->repeat) |
|
|
1390 | { |
|
|
1391 | w->at = w->repeat; |
700 | evtimer_start (w); |
1392 | ev_timer_start (EV_A_ w); |
|
|
1393 | } |
701 | } |
1394 | } |
702 | |
1395 | |
|
|
1396 | #if EV_PERIODICS |
703 | void |
1397 | void |
704 | evperiodic_start (struct ev_periodic *w) |
1398 | ev_periodic_start (EV_P_ struct ev_periodic *w) |
705 | { |
1399 | { |
706 | if (ev_is_active (w)) |
1400 | if (ev_is_active (w)) |
707 | return; |
1401 | return; |
708 | |
1402 | |
709 | assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); |
1403 | if (w->reschedule_cb) |
710 | |
1404 | ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); |
|
|
1405 | else if (w->interval) |
|
|
1406 | { |
|
|
1407 | assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); |
711 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
1408 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
712 | if (w->interval) |
|
|
713 | w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; |
1409 | ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; |
|
|
1410 | } |
714 | |
1411 | |
715 | ev_start ((W)w, ++periodiccnt); |
1412 | ev_start (EV_A_ (W)w, ++periodiccnt); |
716 | array_needsize (periodics, periodicmax, periodiccnt, ); |
1413 | array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); |
717 | periodics [periodiccnt - 1] = w; |
1414 | periodics [periodiccnt - 1] = w; |
718 | upheap ((WT *)periodics, periodiccnt - 1); |
1415 | upheap ((WT *)periodics, periodiccnt - 1); |
719 | } |
|
|
720 | |
1416 | |
|
|
1417 | assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); |
|
|
1418 | } |
|
|
1419 | |
721 | void |
1420 | void |
722 | evperiodic_stop (struct ev_periodic *w) |
1421 | ev_periodic_stop (EV_P_ struct ev_periodic *w) |
723 | { |
1422 | { |
|
|
1423 | ev_clear_pending (EV_A_ (W)w); |
724 | if (!ev_is_active (w)) |
1424 | if (!ev_is_active (w)) |
725 | return; |
1425 | return; |
726 | |
1426 | |
|
|
1427 | assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); |
|
|
1428 | |
727 | if (w->active < periodiccnt--) |
1429 | if (((W)w)->active < periodiccnt--) |
728 | { |
1430 | { |
729 | periodics [w->active - 1] = periodics [periodiccnt]; |
1431 | periodics [((W)w)->active - 1] = periodics [periodiccnt]; |
730 | downheap ((WT *)periodics, periodiccnt, w->active - 1); |
1432 | adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); |
731 | } |
1433 | } |
732 | |
1434 | |
733 | ev_stop ((W)w); |
1435 | ev_stop (EV_A_ (W)w); |
734 | } |
1436 | } |
735 | |
1437 | |
736 | void |
1438 | void |
737 | evsignal_start (struct ev_signal *w) |
1439 | ev_periodic_again (EV_P_ struct ev_periodic *w) |
|
|
1440 | { |
|
|
1441 | /* TODO: use adjustheap and recalculation */ |
|
|
1442 | ev_periodic_stop (EV_A_ w); |
|
|
1443 | ev_periodic_start (EV_A_ w); |
|
|
1444 | } |
|
|
1445 | #endif |
|
|
1446 | |
|
|
1447 | void |
|
|
1448 | ev_idle_start (EV_P_ struct ev_idle *w) |
738 | { |
1449 | { |
739 | if (ev_is_active (w)) |
1450 | if (ev_is_active (w)) |
740 | return; |
1451 | return; |
741 | |
1452 | |
|
|
1453 | ev_start (EV_A_ (W)w, ++idlecnt); |
|
|
1454 | array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2); |
|
|
1455 | idles [idlecnt - 1] = w; |
|
|
1456 | } |
|
|
1457 | |
|
|
1458 | void |
|
|
1459 | ev_idle_stop (EV_P_ struct ev_idle *w) |
|
|
1460 | { |
|
|
1461 | ev_clear_pending (EV_A_ (W)w); |
|
|
1462 | if (!ev_is_active (w)) |
|
|
1463 | return; |
|
|
1464 | |
|
|
1465 | idles [((W)w)->active - 1] = idles [--idlecnt]; |
|
|
1466 | ev_stop (EV_A_ (W)w); |
|
|
1467 | } |
|
|
1468 | |
|
|
1469 | void |
|
|
1470 | ev_prepare_start (EV_P_ struct ev_prepare *w) |
|
|
1471 | { |
|
|
1472 | if (ev_is_active (w)) |
|
|
1473 | return; |
|
|
1474 | |
|
|
1475 | ev_start (EV_A_ (W)w, ++preparecnt); |
|
|
1476 | array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); |
|
|
1477 | prepares [preparecnt - 1] = w; |
|
|
1478 | } |
|
|
1479 | |
|
|
1480 | void |
|
|
1481 | ev_prepare_stop (EV_P_ struct ev_prepare *w) |
|
|
1482 | { |
|
|
1483 | ev_clear_pending (EV_A_ (W)w); |
|
|
1484 | if (!ev_is_active (w)) |
|
|
1485 | return; |
|
|
1486 | |
|
|
1487 | prepares [((W)w)->active - 1] = prepares [--preparecnt]; |
|
|
1488 | ev_stop (EV_A_ (W)w); |
|
|
1489 | } |
|
|
1490 | |
|
|
1491 | void |
|
|
1492 | ev_check_start (EV_P_ struct ev_check *w) |
|
|
1493 | { |
|
|
1494 | if (ev_is_active (w)) |
|
|
1495 | return; |
|
|
1496 | |
|
|
1497 | ev_start (EV_A_ (W)w, ++checkcnt); |
|
|
1498 | array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2); |
|
|
1499 | checks [checkcnt - 1] = w; |
|
|
1500 | } |
|
|
1501 | |
|
|
1502 | void |
|
|
1503 | ev_check_stop (EV_P_ struct ev_check *w) |
|
|
1504 | { |
|
|
1505 | ev_clear_pending (EV_A_ (W)w); |
|
|
1506 | if (!ev_is_active (w)) |
|
|
1507 | return; |
|
|
1508 | |
|
|
1509 | checks [((W)w)->active - 1] = checks [--checkcnt]; |
|
|
1510 | ev_stop (EV_A_ (W)w); |
|
|
1511 | } |
|
|
1512 | |
|
|
1513 | #ifndef SA_RESTART |
|
|
1514 | # define SA_RESTART 0 |
|
|
1515 | #endif |
|
|
1516 | |
|
|
1517 | void |
|
|
1518 | ev_signal_start (EV_P_ struct ev_signal *w) |
|
|
1519 | { |
|
|
1520 | #if EV_MULTIPLICITY |
|
|
1521 | assert (("signal watchers are only supported in the default loop", loop == default_loop)); |
|
|
1522 | #endif |
|
|
1523 | if (ev_is_active (w)) |
|
|
1524 | return; |
|
|
1525 | |
|
|
1526 | assert (("ev_signal_start called with illegal signal number", w->signum > 0)); |
|
|
1527 | |
742 | ev_start ((W)w, 1); |
1528 | ev_start (EV_A_ (W)w, 1); |
743 | array_needsize (signals, signalmax, w->signum, signals_init); |
1529 | array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); |
744 | wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
1530 | wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
745 | |
1531 | |
746 | if (!w->next) |
1532 | if (!((WL)w)->next) |
747 | { |
1533 | { |
|
|
1534 | #if _WIN32 |
|
|
1535 | signal (w->signum, sighandler); |
|
|
1536 | #else |
748 | struct sigaction sa; |
1537 | struct sigaction sa; |
749 | sa.sa_handler = sighandler; |
1538 | sa.sa_handler = sighandler; |
750 | sigfillset (&sa.sa_mask); |
1539 | sigfillset (&sa.sa_mask); |
751 | sa.sa_flags = 0; |
1540 | sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
752 | sigaction (w->signum, &sa, 0); |
1541 | sigaction (w->signum, &sa, 0); |
|
|
1542 | #endif |
753 | } |
1543 | } |
754 | } |
1544 | } |
755 | |
1545 | |
756 | void |
1546 | void |
757 | evsignal_stop (struct ev_signal *w) |
1547 | ev_signal_stop (EV_P_ struct ev_signal *w) |
758 | { |
1548 | { |
|
|
1549 | ev_clear_pending (EV_A_ (W)w); |
759 | if (!ev_is_active (w)) |
1550 | if (!ev_is_active (w)) |
760 | return; |
1551 | return; |
761 | |
1552 | |
762 | wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
1553 | wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
763 | ev_stop ((W)w); |
1554 | ev_stop (EV_A_ (W)w); |
764 | |
1555 | |
765 | if (!signals [w->signum - 1].head) |
1556 | if (!signals [w->signum - 1].head) |
766 | signal (w->signum, SIG_DFL); |
1557 | signal (w->signum, SIG_DFL); |
767 | } |
1558 | } |
768 | |
1559 | |
769 | void evidle_start (struct ev_idle *w) |
1560 | void |
|
|
1561 | ev_child_start (EV_P_ struct ev_child *w) |
770 | { |
1562 | { |
|
|
1563 | #if EV_MULTIPLICITY |
|
|
1564 | assert (("child watchers are only supported in the default loop", loop == default_loop)); |
|
|
1565 | #endif |
771 | if (ev_is_active (w)) |
1566 | if (ev_is_active (w)) |
772 | return; |
1567 | return; |
773 | |
1568 | |
774 | ev_start ((W)w, ++idlecnt); |
1569 | ev_start (EV_A_ (W)w, 1); |
775 | array_needsize (idles, idlemax, idlecnt, ); |
1570 | wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
776 | idles [idlecnt - 1] = w; |
|
|
777 | } |
1571 | } |
778 | |
1572 | |
779 | void evidle_stop (struct ev_idle *w) |
1573 | void |
|
|
1574 | ev_child_stop (EV_P_ struct ev_child *w) |
780 | { |
1575 | { |
781 | idles [w->active - 1] = idles [--idlecnt]; |
1576 | ev_clear_pending (EV_A_ (W)w); |
782 | ev_stop ((W)w); |
|
|
783 | } |
|
|
784 | |
|
|
785 | void evcheck_start (struct ev_check *w) |
|
|
786 | { |
|
|
787 | if (ev_is_active (w)) |
1577 | if (!ev_is_active (w)) |
788 | return; |
1578 | return; |
789 | |
1579 | |
790 | ev_start ((W)w, ++checkcnt); |
1580 | wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
791 | array_needsize (checks, checkmax, checkcnt, ); |
|
|
792 | checks [checkcnt - 1] = w; |
|
|
793 | } |
|
|
794 | |
|
|
795 | void evcheck_stop (struct ev_check *w) |
|
|
796 | { |
|
|
797 | checks [w->active - 1] = checks [--checkcnt]; |
|
|
798 | ev_stop ((W)w); |
1581 | ev_stop (EV_A_ (W)w); |
799 | } |
1582 | } |
800 | |
1583 | |
801 | /*****************************************************************************/ |
1584 | /*****************************************************************************/ |
802 | |
1585 | |
803 | #if 0 |
1586 | struct ev_once |
804 | |
1587 | { |
805 | struct ev_io wio; |
1588 | struct ev_io io; |
806 | |
|
|
807 | static void |
|
|
808 | sin_cb (struct ev_io *w, int revents) |
|
|
809 | { |
|
|
810 | fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); |
|
|
811 | } |
|
|
812 | |
|
|
813 | static void |
|
|
814 | ocb (struct ev_timer *w, int revents) |
|
|
815 | { |
|
|
816 | //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); |
|
|
817 | evtimer_stop (w); |
|
|
818 | evtimer_start (w); |
|
|
819 | } |
|
|
820 | |
|
|
821 | static void |
|
|
822 | scb (struct ev_signal *w, int revents) |
|
|
823 | { |
|
|
824 | fprintf (stderr, "signal %x,%d\n", revents, w->signum); |
|
|
825 | evio_stop (&wio); |
|
|
826 | evio_start (&wio); |
|
|
827 | } |
|
|
828 | |
|
|
829 | static void |
|
|
830 | gcb (struct ev_signal *w, int revents) |
|
|
831 | { |
|
|
832 | fprintf (stderr, "generic %x\n", revents); |
|
|
833 | |
|
|
834 | } |
|
|
835 | |
|
|
836 | int main (void) |
|
|
837 | { |
|
|
838 | ev_init (0); |
|
|
839 | |
|
|
840 | evio_init (&wio, sin_cb, 0, EV_READ); |
|
|
841 | evio_start (&wio); |
|
|
842 | |
|
|
843 | struct ev_timer t[10000]; |
|
|
844 | |
|
|
845 | #if 0 |
|
|
846 | int i; |
|
|
847 | for (i = 0; i < 10000; ++i) |
|
|
848 | { |
|
|
849 | struct ev_timer *w = t + i; |
|
|
850 | evw_init (w, ocb, i); |
|
|
851 | evtimer_init_abs (w, ocb, drand48 (), 0.99775533); |
|
|
852 | evtimer_start (w); |
|
|
853 | if (drand48 () < 0.5) |
|
|
854 | evtimer_stop (w); |
|
|
855 | } |
|
|
856 | #endif |
|
|
857 | |
|
|
858 | struct ev_timer t1; |
1589 | struct ev_timer to; |
859 | evtimer_init (&t1, ocb, 5, 10); |
1590 | void (*cb)(int revents, void *arg); |
860 | evtimer_start (&t1); |
1591 | void *arg; |
|
|
1592 | }; |
861 | |
1593 | |
862 | struct ev_signal sig; |
1594 | static void |
863 | evsignal_init (&sig, scb, SIGQUIT); |
1595 | once_cb (EV_P_ struct ev_once *once, int revents) |
864 | evsignal_start (&sig); |
1596 | { |
|
|
1597 | void (*cb)(int revents, void *arg) = once->cb; |
|
|
1598 | void *arg = once->arg; |
865 | |
1599 | |
866 | struct ev_check cw; |
1600 | ev_io_stop (EV_A_ &once->io); |
867 | evcheck_init (&cw, gcb); |
1601 | ev_timer_stop (EV_A_ &once->to); |
868 | evcheck_start (&cw); |
1602 | ev_free (once); |
869 | |
1603 | |
870 | struct ev_idle iw; |
1604 | cb (revents, arg); |
871 | evidle_init (&iw, gcb); |
|
|
872 | evidle_start (&iw); |
|
|
873 | |
|
|
874 | ev_loop (0); |
|
|
875 | |
|
|
876 | return 0; |
|
|
877 | } |
1605 | } |
878 | |
1606 | |
879 | #endif |
1607 | static void |
|
|
1608 | once_cb_io (EV_P_ struct ev_io *w, int revents) |
|
|
1609 | { |
|
|
1610 | once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
|
|
1611 | } |
880 | |
1612 | |
|
|
1613 | static void |
|
|
1614 | once_cb_to (EV_P_ struct ev_timer *w, int revents) |
|
|
1615 | { |
|
|
1616 | once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
|
|
1617 | } |
881 | |
1618 | |
|
|
1619 | void |
|
|
1620 | ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
|
|
1621 | { |
|
|
1622 | struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); |
882 | |
1623 | |
|
|
1624 | if (!once) |
|
|
1625 | cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
|
|
1626 | else |
|
|
1627 | { |
|
|
1628 | once->cb = cb; |
|
|
1629 | once->arg = arg; |
883 | |
1630 | |
|
|
1631 | ev_init (&once->io, once_cb_io); |
|
|
1632 | if (fd >= 0) |
|
|
1633 | { |
|
|
1634 | ev_io_set (&once->io, fd, events); |
|
|
1635 | ev_io_start (EV_A_ &once->io); |
|
|
1636 | } |
|
|
1637 | |
|
|
1638 | ev_init (&once->to, once_cb_to); |
|
|
1639 | if (timeout >= 0.) |
|
|
1640 | { |
|
|
1641 | ev_timer_set (&once->to, timeout, 0.); |
|
|
1642 | ev_timer_start (EV_A_ &once->to); |
|
|
1643 | } |
|
|
1644 | } |
|
|
1645 | } |
|
|
1646 | |
|
|
1647 | #ifdef __cplusplus |
|
|
1648 | } |
|
|
1649 | #endif |
|
|
1650 | |