1 | /* |
1 | /* |
2 | iom.C -- generic I/O multiplexor |
2 | iom.C -- generic I/O multiplexer |
3 | Copyright (C) 2003, 2004 Marc Lehmann <pcg@goof.com> |
3 | Copyright (C) 2003-2006 Marc Lehmann <gvpe@schmorp.de> |
4 | |
4 | |
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5 | This file is part of GVPE. |
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6 | |
5 | This program is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify |
6 | it under the terms of the GNU General Public License as published by |
8 | it under the terms of the GNU General Public License as published by |
7 | the Free Software Foundation; either version 2 of the License, or |
9 | the Free Software Foundation; either version 2 of the License, or |
8 | (at your option) any later version. |
10 | (at your option) any later version. |
9 | |
11 | |
10 | This program is distributed in the hope that it will be useful, |
12 | This program is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | GNU General Public License for more details. |
15 | GNU General Public License for more details. |
14 | |
16 | |
15 | You should have received a copy of the GNU General Public License |
17 | You should have received a copy of the GNU General Public License |
16 | along with this program; if not, write to the Free Software |
18 | along with gvpe; if not, write to the Free Software |
17 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
18 | */ |
20 | */ |
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21 | |
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22 | #include "iom.h" |
19 | |
23 | |
20 | #include <cstdio> |
24 | #include <cstdio> |
21 | #include <cstdlib> |
25 | #include <cstdlib> |
22 | #include <cerrno> |
26 | #include <cerrno> |
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27 | #include <cassert> |
23 | |
28 | |
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29 | #include <sys/types.h> |
24 | #include <sys/time.h> |
30 | #include <sys/time.h> |
25 | |
31 | |
26 | #if 1 // older unices need these includes for select(2) |
32 | #if 1 // older unices need these includes for select (2) |
27 | # include <unistd.h> |
33 | # include <unistd.h> |
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34 | # include <time.h> |
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35 | #endif |
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36 | |
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37 | #if IOM_CHILD |
28 | # include <sys/types.h> |
38 | # include <sys/wait.h> |
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39 | #endif |
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40 | |
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41 | #if IOM_SIG |
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42 | # include <csignal> |
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43 | # include <fcntl.h> |
29 | #endif |
44 | #endif |
30 | |
45 | |
31 | // if the BSDs would at least be marginally POSIX-compatible.. *sigh* |
46 | // if the BSDs would at least be marginally POSIX-compatible.. *sigh* |
32 | // until that happens, sys/select.h must come last |
47 | // until that happens, sys/select.h must come last |
33 | #include <sys/select.h> |
48 | #include <sys/select.h> |
34 | |
49 | |
35 | #include "iom.h" |
50 | #define TIMEVAL timeval |
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51 | #define TV_FRAC tv_usec |
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52 | #define TV_MULT 1000000L |
36 | |
53 | |
37 | // TSTAMP_MAX must still fit into a positive struct timeval |
54 | #if IOM_CHECK |
38 | #define TSTAMP_MAX (double)(1UL<<31) |
55 | static io_manager_vec<check_watcher> cw; |
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56 | #endif |
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57 | #if IOM_IDLE |
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58 | static io_manager_vec<idle_watcher> iw; |
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59 | #endif |
39 | |
60 | |
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61 | #if IOM_SIG |
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62 | static int sigpipe[2]; // signal signalling pipe |
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63 | static sigset_t sigs; |
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64 | struct sig_vec : io_manager_vec<sig_watcher> { |
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65 | int pending; |
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66 | sig_vec () |
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67 | : pending (false) |
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68 | { } |
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69 | }; |
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70 | static vector<sig_vec *> sw; |
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71 | #endif |
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72 | |
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73 | #if IOM_CHILD |
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74 | static io_manager_vec<child_watcher> pw; |
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75 | #endif |
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76 | |
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77 | #ifdef IOM_LIBEVENT |
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78 | static bool need_set_now; // need to set_now in callback |
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79 | #else |
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80 | #if IOM_IO |
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81 | static io_manager_vec<io_watcher> iow; |
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82 | #endif |
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83 | #if IOM_TIME |
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84 | static io_manager_vec<time_watcher> tw; |
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85 | #endif |
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86 | #endif |
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87 | |
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88 | #if IOM_TIME |
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89 | tstamp io_manager::now () |
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90 | { |
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91 | struct timeval tv; |
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92 | |
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93 | gettimeofday (&tv, 0); |
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94 | return (tstamp)tv.tv_sec + (tstamp)tv.tv_usec / 1000000.; |
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95 | } |
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96 | |
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97 | void io_manager::set_now () |
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98 | { |
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99 | NOW = now (); |
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100 | #ifdef IOM_LIBEVENT |
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101 | need_set_now = false; |
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102 | #endif |
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103 | } |
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104 | #endif |
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105 | |
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106 | #ifndef IOM_LIBEVENT |
40 | // this is a dummy time watcher to ensure that the first |
107 | // this is a dummy time watcher to ensure that the first |
41 | // time watcher is _always_ valid, this gets rid of a lot |
108 | // time watcher is _always_ valid, this gets rid of a lot |
42 | // of null-pointer-checks |
109 | // of null-pointer-checks |
43 | // (must come _before_ iom is being defined) |
110 | // (must come _before_ iom is being defined) |
44 | static struct tw0 : time_watcher { |
111 | static struct tw0 : time_watcher |
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112 | { |
45 | void cb (time_watcher &w) |
113 | void cb (time_watcher &w) |
46 | { |
114 | { |
47 | // should never get called |
115 | // should never get called |
48 | // reached end-of-time, or tstamp has a bogus definition, |
116 | // reached end-of-time, or tstamp has a bogus definition, |
49 | // or compiler initilization order broken, or somethine else :) |
117 | // or compiler initialisation order broken, or something else :) |
50 | abort (); |
118 | abort (); |
51 | } |
119 | } |
52 | |
120 | |
53 | tw0() |
121 | tw0 () |
54 | : time_watcher (this, &tw0::cb) |
122 | : time_watcher (this, &tw0::cb) |
55 | { } |
123 | { } |
56 | } tw0; |
124 | } tw0; |
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125 | #endif |
57 | |
126 | |
58 | tstamp NOW; |
127 | tstamp NOW; |
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128 | |
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129 | #if IOM_CHILD |
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130 | // sig_watcher for child signal(s) |
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131 | static struct sw0 : sig_watcher |
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132 | { |
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133 | void cb (sig_watcher &w) |
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134 | { |
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135 | // SIGCHLD, call corresponding watchera |
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136 | pid_t pid; |
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137 | int status; |
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138 | |
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139 | while ((pid = waitpid (-1, &status, WNOHANG)) > 0) |
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140 | for (int i = pw.size (); i--; ) |
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141 | { |
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142 | child_watcher *w = pw[i]; |
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143 | |
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144 | if (!w) |
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145 | pw.erase_unordered (i); |
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146 | else if (w->pid == pid) |
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147 | { |
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148 | io_manager::unreg (*w); |
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149 | w->call (*w, status); |
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150 | } |
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151 | } |
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152 | } |
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153 | |
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154 | sw0 () |
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155 | : sig_watcher (this, &sw0::cb) |
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156 | { } |
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157 | } sw0; |
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158 | #endif |
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159 | |
59 | static bool iom_valid; |
160 | static bool iom_valid; |
60 | io_manager iom; |
161 | |
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162 | // used for initialisation only |
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163 | static struct init { |
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164 | init () |
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165 | { |
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166 | #ifdef IOM_PREINIT |
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167 | { IOM_PREINIT } |
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168 | #endif |
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169 | |
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170 | #ifdef IOM_LIBEVENT |
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171 | event_init (); |
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172 | #endif |
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173 | iom_valid = true; |
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174 | |
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175 | #if IOM_SIG |
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176 | sigemptyset (&sigs); |
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177 | |
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178 | if (pipe (sigpipe)) |
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179 | { |
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180 | perror ("io_manager: unable to create signal pipe, aborting."); |
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181 | abort (); |
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182 | } |
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183 | |
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184 | fcntl (sigpipe[0], F_SETFL, O_NONBLOCK); fcntl (sigpipe[0], F_SETFD, FD_CLOEXEC); |
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185 | fcntl (sigpipe[1], F_SETFL, O_NONBLOCK); fcntl (sigpipe[1], F_SETFD, FD_CLOEXEC); |
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186 | #endif |
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187 | |
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188 | #if IOM_CHILD |
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189 | sw0.start (SIGCHLD); |
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190 | #endif |
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191 | |
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192 | #if IOM_TIME |
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193 | io_manager::set_now (); |
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194 | |
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195 | #ifndef IOM_LIBEVENT |
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196 | tw0.start (TSTAMP_MAX); |
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197 | #endif |
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198 | #endif |
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199 | |
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200 | #ifdef IOM_POSTINIT |
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201 | { IOM_POSTINIT } |
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202 | #endif |
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203 | } |
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204 | |
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205 | ~init () |
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206 | { |
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207 | iom_valid = false; |
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208 | } |
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209 | |
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210 | static void required (); |
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211 | } init; |
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212 | |
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213 | void |
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214 | init::required () |
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215 | { |
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216 | if (!iom_valid) |
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217 | { |
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218 | write (2, "io_manager: early registration attempt, aborting.\n", |
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219 | sizeof ("io_manager: early registration attempt, aborting.\n") - 1); |
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220 | abort (); |
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221 | } |
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222 | } |
61 | |
223 | |
62 | template<class watcher> |
224 | template<class watcher> |
63 | void io_manager::reg (watcher *w, io_manager_vec<watcher> &queue) |
225 | void io_manager::reg (watcher &w, io_manager_vec<watcher> &queue) |
64 | { |
226 | { |
65 | if (!iom_valid) |
227 | init::required (); |
66 | abort (); |
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67 | |
228 | |
68 | if (!w->active) |
229 | if (!w.active) |
69 | { |
230 | { |
70 | queue.push_back (w); |
231 | queue.push_back (&w); |
71 | w->active = queue.size (); |
232 | w.active = queue.size (); |
72 | } |
233 | } |
73 | } |
234 | } |
74 | |
235 | |
75 | template<class watcher> |
236 | template<class watcher> |
76 | void io_manager::unreg (watcher *w, io_manager_vec<watcher> &queue) |
237 | void io_manager::unreg (watcher &w, io_manager_vec<watcher> &queue) |
77 | { |
238 | { |
78 | if (!iom_valid) |
239 | if (!iom_valid) |
79 | return; |
240 | return; |
80 | |
241 | |
81 | if (w->active) |
242 | if (w.active) |
82 | { |
243 | { |
83 | queue [w->active - 1] = 0; |
244 | queue [w.active - 1] = 0; |
84 | w->active = 0; |
245 | w.active = 0; |
85 | } |
246 | } |
86 | } |
247 | } |
87 | |
248 | |
88 | #if IOM_TIME |
249 | #if IOM_TIME |
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250 | #ifdef IOM_LIBEVENT |
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251 | void iom_time_c_callback (int fd, short events, void *data) |
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252 | { |
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253 | if (need_set_now) io_manager::set_now (); |
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254 | time_watcher *w = static_cast<time_watcher *>(data); |
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255 | w->call (*w); |
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256 | } |
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257 | |
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258 | void time_watcher::start () |
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259 | { |
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260 | stop (); |
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261 | evtimer_set (&ev, iom_time_c_callback, (void *)this); |
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262 | struct timeval tv; |
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263 | tv.tv_sec = (long)at; |
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264 | tv.tv_usec = (long)((at - (tstamp)tv.tv_sec) * 1000000.); |
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265 | evtimer_add (&ev, &tv); |
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266 | active = 1; |
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267 | } |
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268 | #else |
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269 | void io_manager::reg (time_watcher &w) { io_manager::reg (w, tw); } |
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270 | void io_manager::unreg (time_watcher &w) { io_manager::unreg (w, tw); } |
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271 | #endif |
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272 | |
89 | void time_watcher::trigger () |
273 | void time_watcher::trigger () |
90 | { |
274 | { |
91 | call (*this); |
275 | call (*this); |
92 | |
276 | start (); |
93 | iom.reg (this); |
277 | } |
94 | } |
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95 | |
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96 | void io_manager::reg (time_watcher *w) { reg (w, tw); } |
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97 | void io_manager::unreg (time_watcher *w) { unreg (w, tw); } |
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98 | #endif |
278 | #endif |
99 | |
279 | |
100 | #if IOM_IO |
280 | #if IOM_IO |
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281 | #ifdef IOM_LIBEVENT |
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282 | void iom_io_c_callback (int fd, short events, void *data) |
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283 | { |
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284 | if (need_set_now) io_manager::set_now (); |
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285 | io_watcher *w = static_cast<io_watcher *>(data); |
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286 | w->call (*w, events); |
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287 | } |
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288 | |
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289 | void io_watcher::set (int fd_, short events_) |
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290 | { |
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291 | if (active) event_del (&ev); |
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292 | fd = fd_; |
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293 | events = events_; |
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294 | event_set (&ev, fd_, events_ | EV_PERSIST, iom_io_c_callback, (void *)this); |
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295 | if (active) event_add (&ev, 0); |
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296 | } |
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297 | #else |
101 | void io_manager::reg (io_watcher *w) { reg (w, iow); } |
298 | void io_manager::reg (io_watcher &w) { io_manager::reg (w, iow); } |
102 | void io_manager::unreg (io_watcher *w) { unreg (w, iow); } |
299 | void io_manager::unreg (io_watcher &w) { io_manager::unreg (w, iow); } |
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300 | #endif |
103 | #endif |
301 | #endif |
104 | |
302 | |
105 | #if IOM_CHECK |
303 | #if IOM_CHECK |
106 | void io_manager::reg (check_watcher *w) { reg (w, cw); } |
304 | void io_manager::reg (check_watcher &w) { io_manager::reg (w, cw); } |
107 | void io_manager::unreg (check_watcher *w) { unreg (w, cw); } |
305 | void io_manager::unreg (check_watcher &w) { io_manager::unreg (w, cw); } |
108 | #endif |
306 | #endif |
109 | |
307 | |
110 | #if IOM_IDLE |
308 | #if IOM_IDLE |
111 | void io_manager::reg (idle_watcher *w) { reg (w, iw); } |
309 | void io_manager::reg (idle_watcher &w) { io_manager::reg (w, iw); } |
112 | void io_manager::unreg (idle_watcher *w) { unreg (w, iw); } |
310 | void io_manager::unreg (idle_watcher &w) { io_manager::unreg (w, iw); } |
113 | #endif |
311 | #endif |
114 | |
312 | |
115 | #if IOM_TIME |
313 | #if IOM_SIG |
116 | inline void set_now (void) |
314 | static void |
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315 | sighandler (int signum) |
117 | { |
316 | { |
118 | struct timeval tv; |
317 | sw [signum - 1]->pending = true; |
119 | |
318 | |
120 | gettimeofday (&tv, 0); |
319 | // we use a pipe for signal notifications, as most current |
121 | |
320 | // OSes (Linux...) do not implement pselect correctly. ugh. |
122 | NOW = (tstamp)tv.tv_sec + (tstamp)tv.tv_usec / 1000000; |
321 | char ch = signum; // actual content not used |
123 | #endif |
322 | write (sigpipe[1], &ch, 1); |
124 | } |
323 | } |
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324 | |
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325 | void io_manager::reg (sig_watcher &w) |
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326 | { |
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327 | init::required (); |
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328 | |
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329 | assert (0 < w.signum); |
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330 | |
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331 | sw.reserve (w.signum); |
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332 | |
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333 | while (sw.size () < w.signum) // pathetic |
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334 | sw.push_back (0); |
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335 | |
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336 | sig_vec *&sv = sw[w.signum - 1]; |
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337 | |
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338 | if (!sv) |
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339 | { |
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340 | sv = new sig_vec; |
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341 | |
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342 | sigaddset (&sigs, w.signum); |
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343 | sigprocmask (SIG_BLOCK, &sigs, NULL); |
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344 | |
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345 | struct sigaction sa; |
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346 | sa.sa_handler = sighandler; |
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347 | sigfillset (&sa.sa_mask); |
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348 | sa.sa_flags = SA_RESTART; |
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349 | |
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350 | if (sigaction (w.signum, &sa, 0)) |
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351 | { |
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352 | perror ("io_manager: error while installing signal handler, ignoring."); |
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353 | abort (); |
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354 | } |
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355 | |
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356 | } |
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357 | |
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358 | io_manager::reg (w, *sv); |
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359 | } |
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360 | |
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361 | void io_manager::unreg (sig_watcher &w) |
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362 | { |
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363 | if (!w.active || !iom_valid) |
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364 | return; |
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365 | |
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366 | assert (0 < w.signum && w.signum <= sw.size ()); |
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367 | |
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368 | io_manager::unreg (w, *sw[w.signum - 1]); |
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369 | } |
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370 | |
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371 | void sig_watcher::start (int signum) |
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372 | { |
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373 | stop (); |
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374 | this->signum = signum; |
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375 | io_manager::reg (*this); |
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376 | } |
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377 | #endif |
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378 | |
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379 | #if IOM_CHILD |
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380 | void io_manager::reg (child_watcher &w) { io_manager::reg (w, pw); } |
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381 | void io_manager::unreg (child_watcher &w) { io_manager::unreg (w, pw); } |
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382 | #endif |
125 | |
383 | |
126 | void io_manager::loop () |
384 | void io_manager::loop () |
127 | { |
385 | { |
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386 | init::required (); |
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387 | |
128 | #if IOM_TIME |
388 | #if IOM_TIME |
129 | set_now (); |
389 | set_now (); |
130 | #endif |
390 | #endif |
131 | |
391 | |
132 | for (;;) |
392 | for (;;) |
133 | { |
393 | { |
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394 | #ifndef IOM_LIBEVENT |
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395 | #if IOM_TIME |
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396 | // call pending time watchers |
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397 | { |
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398 | bool activity; |
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399 | |
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400 | do |
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401 | { |
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402 | activity = false; |
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403 | |
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404 | for (int i = tw.size (); i--; ) |
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405 | if (!tw[i]) |
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406 | tw.erase_unordered (i); |
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407 | else if (tw[i]->at <= NOW) |
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408 | { |
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409 | time_watcher &w = *tw[i]; |
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410 | |
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411 | unreg (w); |
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412 | w.call (w); |
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413 | |
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414 | activity = true; |
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415 | } |
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416 | } |
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417 | while (activity); |
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418 | } |
|
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419 | #endif |
|
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420 | #endif |
|
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421 | |
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422 | #if IOM_CHECK |
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423 | // call all check watchers |
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424 | for (int i = cw.size (); i--; ) |
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425 | if (!cw[i]) |
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426 | cw.erase_unordered (i); |
|
|
427 | else |
|
|
428 | cw[i]->call (*cw[i]); |
|
|
429 | #endif |
|
|
430 | |
134 | struct timeval *to = 0; |
431 | struct TIMEVAL *to = 0; |
135 | struct timeval tval; |
432 | struct TIMEVAL tval; |
136 | |
433 | |
137 | #if IOM_IDLE |
434 | #if IOM_IDLE |
138 | if (iw.size ()) |
435 | if (iw.size ()) |
139 | { |
436 | { |
140 | tval.tv_sec = 0; |
437 | tval.tv_sec = 0; |
141 | tval.tv_usec = 0; |
438 | tval.TV_FRAC = 0; |
142 | to = &tval; |
439 | to = &tval; |
143 | } |
440 | } |
144 | else |
441 | else |
145 | #endif |
442 | #endif |
146 | { |
443 | { |
147 | #if IOM_TIME |
444 | #ifndef IOM_LIBEVENT |
148 | time_watcher *next; |
445 | #if IOM_TIME |
|
|
446 | // find earliest active watcher |
|
|
447 | time_watcher *next = tw[0]; // the first time-watcher must exist at ALL times |
149 | |
448 | |
150 | for (;;) |
449 | for (io_manager_vec<time_watcher>::const_iterator i = tw.end (); i-- > tw.begin (); ) |
|
|
450 | if (*i && (*i)->at < next->at) |
|
|
451 | next = *i; |
|
|
452 | |
|
|
453 | if (next->at > NOW && next != tw[0]) |
151 | { |
454 | { |
152 | next = tw[0]; // the first time-watcher must exist at ALL times |
455 | double diff = next->at - NOW; |
|
|
456 | tval.tv_sec = (int)diff; |
|
|
457 | tval.TV_FRAC = (int) ((diff - tval.tv_sec) * TV_MULT); |
|
|
458 | to = &tval; |
|
|
459 | } |
|
|
460 | #endif |
|
|
461 | #endif |
|
|
462 | } |
153 | |
463 | |
154 | for (int i = tw.size (); i--; ) |
464 | #ifndef IOM_LIBEVENT |
|
|
465 | #if IOM_IO || IOM_SIG |
|
|
466 | fd_set rfd, wfd; |
|
|
467 | |
|
|
468 | FD_ZERO (&rfd); |
|
|
469 | FD_ZERO (&wfd); |
|
|
470 | |
|
|
471 | int fds = 0; |
|
|
472 | |
|
|
473 | #if IOM_IO |
|
|
474 | for (io_manager_vec<io_watcher>::const_iterator i = iow.end (); i-- > iow.begin (); ) |
155 | if (!tw[i]) |
475 | if (*i) |
156 | tw.erase_unordered (i); |
|
|
157 | else if (tw[i]->at < next->at) |
|
|
158 | next = tw[i]; |
|
|
159 | |
|
|
160 | if (next->at > NOW) |
|
|
161 | { |
476 | { |
162 | if (next != tw[0]) |
477 | if ((*i)->events & EVENT_READ ) FD_SET ((*i)->fd, &rfd); |
163 | { |
478 | if ((*i)->events & EVENT_WRITE) FD_SET ((*i)->fd, &wfd); |
164 | double diff = next->at - NOW; |
479 | |
165 | tval.tv_sec = (int)diff; |
480 | if ((*i)->fd >= fds) fds = (*i)->fd + 1; |
166 | tval.tv_usec = (int)((diff - tval.tv_sec) * 1000000); |
|
|
167 | to = &tval; |
|
|
168 | } |
|
|
169 | break; |
|
|
170 | } |
481 | } |
171 | else |
482 | #endif |
|
|
483 | |
|
|
484 | if (!to && !fds) //TODO: also check idle_watchers and check_watchers? |
|
|
485 | break; // no events |
|
|
486 | |
|
|
487 | #if IOM_SIG |
|
|
488 | FD_SET (sigpipe[0], &rfd); |
|
|
489 | if (sigpipe[0] >= fds) fds = sigpipe[0] + 1; |
|
|
490 | #endif |
|
|
491 | |
|
|
492 | #if IOM_SIG |
|
|
493 | // there is no race, as we use a pipe for signals, so select |
|
|
494 | // will return if a signal is caught. |
|
|
495 | sigprocmask (SIG_UNBLOCK, &sigs, NULL); |
|
|
496 | #endif |
|
|
497 | fds = select (fds, &rfd, &wfd, NULL, to); |
|
|
498 | #if IOM_SIG |
|
|
499 | sigprocmask (SIG_BLOCK, &sigs, NULL); |
|
|
500 | #endif |
|
|
501 | #elif IOM_TIME |
|
|
502 | if (!to) |
|
|
503 | break; |
|
|
504 | |
|
|
505 | select (0, 0, 0, 0, to); |
|
|
506 | #endif |
|
|
507 | |
|
|
508 | #if IOM_TIME |
|
|
509 | { |
|
|
510 | // update time, try to compensate for gross non-monotonic time changes |
|
|
511 | tstamp diff = NOW; |
|
|
512 | set_now (); |
|
|
513 | diff = NOW - diff; |
|
|
514 | |
|
|
515 | if (diff < 0) |
|
|
516 | for (io_manager_vec<time_watcher>::const_iterator i = tw.end (); i-- > tw.begin (); ) |
|
|
517 | if (*i) |
|
|
518 | (*i)->at += diff; |
|
|
519 | } |
|
|
520 | #endif |
|
|
521 | |
|
|
522 | if (fds > 0) |
|
|
523 | { |
|
|
524 | #if IOM_SIG |
|
|
525 | if (FD_ISSET (sigpipe[0], &rfd)) |
172 | { |
526 | { |
173 | unreg (next); |
527 | char ch; |
174 | next->call (*next); |
528 | |
|
|
529 | while (read (sigpipe[0], &ch, 1) > 0) |
|
|
530 | ; |
|
|
531 | |
|
|
532 | for (vector<sig_vec *>::iterator svp = sw.end (); svp-- > sw.begin (); ) |
|
|
533 | if (*svp && (*svp)->pending) |
|
|
534 | { |
|
|
535 | sig_vec &sv = **svp; |
|
|
536 | for (int i = sv.size (); i--; ) |
|
|
537 | if (!sv[i]) |
|
|
538 | sv.erase_unordered (i); |
|
|
539 | else |
|
|
540 | sv[i]->call (*sv[i]); |
|
|
541 | |
|
|
542 | sv.pending = false; |
|
|
543 | } |
175 | } |
544 | } |
|
|
545 | #endif |
|
|
546 | |
|
|
547 | #if IOM_IO |
|
|
548 | for (int i = iow.size (); i--; ) |
|
|
549 | if (!iow[i]) |
|
|
550 | iow.erase_unordered (i); |
|
|
551 | else |
|
|
552 | { |
|
|
553 | io_watcher &w = *iow[i]; |
|
|
554 | short revents = w.events; |
|
|
555 | |
|
|
556 | if (!FD_ISSET (w.fd, &rfd)) revents &= ~EVENT_READ; |
|
|
557 | if (!FD_ISSET (w.fd, &wfd)) revents &= ~EVENT_WRITE; |
|
|
558 | |
|
|
559 | if (revents) |
|
|
560 | w.call (w, revents); |
|
|
561 | } |
|
|
562 | #endif |
176 | } |
563 | } |
177 | #endif |
564 | else if (fds < 0 && errno != EINTR) |
|
|
565 | { |
|
|
566 | perror ("io_manager: fatal error while waiting for I/O or time event, aborting."); |
|
|
567 | abort (); |
178 | } |
568 | } |
179 | |
569 | #if IOM_IDLE |
180 | #if IOM_CHECK |
|
|
181 | for (int i = cw.size (); i--; ) |
|
|
182 | if (!cw[i]) |
|
|
183 | cw.erase_unordered (i); |
|
|
184 | else |
570 | else |
185 | cw[i]->call (*cw[i]); |
|
|
186 | #endif |
|
|
187 | |
|
|
188 | #if IOM_IO |
|
|
189 | fd_set rfd, wfd, efd; |
|
|
190 | |
|
|
191 | FD_ZERO (&rfd); |
|
|
192 | FD_ZERO (&wfd); |
|
|
193 | |
|
|
194 | int fds = 0; |
|
|
195 | |
|
|
196 | for (io_manager_vec<io_watcher>::iterator i = iow.end (); i-- > iow.begin (); ) |
|
|
197 | if (*i) |
|
|
198 | { |
|
|
199 | if ((*i)->events & EVENT_READ ) FD_SET ((*i)->fd, &rfd); |
|
|
200 | if ((*i)->events & EVENT_WRITE) FD_SET ((*i)->fd, &wfd); |
|
|
201 | |
|
|
202 | if ((*i)->fd >= fds) fds = (*i)->fd + 1; |
|
|
203 | } |
|
|
204 | |
|
|
205 | if (!to && !fds) //TODO: also check idle_watchers and check_watchers |
|
|
206 | break; // no events |
|
|
207 | |
|
|
208 | fds = select (fds, &rfd, &wfd, &efd, to); |
|
|
209 | # if IOM_TIME |
|
|
210 | set_now (); |
|
|
211 | # endif |
|
|
212 | |
|
|
213 | if (fds > 0) |
|
|
214 | for (int i = iow.size (); i--; ) |
|
|
215 | if (!iow[i]) |
|
|
216 | iow.erase_unordered (i); |
|
|
217 | else |
|
|
218 | { |
|
|
219 | short revents = iow[i]->events; |
|
|
220 | |
|
|
221 | if (!FD_ISSET (iow[i]->fd, &rfd)) revents &= ~EVENT_READ; |
|
|
222 | if (!FD_ISSET (iow[i]->fd, &wfd)) revents &= ~EVENT_WRITE; |
|
|
223 | |
|
|
224 | if (revents) |
|
|
225 | iow[i]->call (*iow[i], revents); |
|
|
226 | } |
|
|
227 | else if (fds < 0 && errno != EINTR) |
|
|
228 | { |
|
|
229 | perror ("Error while waiting for I/O or time event"); |
|
|
230 | abort (); |
|
|
231 | } |
|
|
232 | #if IOM_IDLE |
|
|
233 | else |
|
|
234 | for (int i = iw.size (); i--; ) |
571 | for (int i = iw.size (); i--; ) |
235 | if (!iw[i]) |
572 | if (!iw[i]) |
236 | iw.erase_unordered (i); |
573 | iw.erase_unordered (i); |
237 | else |
574 | else |
238 | iw[i]->call (*iw[i]); |
575 | iw[i]->call (*iw[i]); |
239 | #endif |
576 | #endif |
240 | |
577 | |
241 | #elif IOM_TIME |
578 | #else |
|
|
579 | need_set_now = true; |
|
|
580 | |
242 | if (!to) |
581 | if (to) |
243 | break; |
582 | event_loop (EVLOOP_NONBLOCK); |
|
|
583 | else |
|
|
584 | event_loop (EVLOOP_ONCE); |
244 | |
585 | |
245 | select (0, 0, 0, 0, &to); |
586 | if (need_set_now) set_now (); |
246 | set_now (); |
587 | #endif |
247 | #else |
588 | //TODO: IOM_IDLE |
248 | break; |
|
|
249 | #endif |
|
|
250 | } |
589 | } |
251 | } |
590 | } |
252 | |
591 | |
253 | io_manager::io_manager () |
|
|
254 | { |
|
|
255 | iom_valid = true; |
|
|
256 | |
|
|
257 | #if IOM_TIME |
|
|
258 | set_now (); |
|
|
259 | |
|
|
260 | tw0.start (TSTAMP_MAX); |
|
|
261 | #endif |
|
|
262 | } |
|
|
263 | |
|
|
264 | io_manager::~io_manager () |
|
|
265 | { |
|
|
266 | iom_valid = false; |
|
|
267 | } |
|
|
268 | |
|
|