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| 21 | #include <sys/time.h> |
21 | #include <sys/time.h> |
| 22 | |
22 | |
| 23 | #include <algorithm> |
23 | #include <algorithm> |
| 24 | #include <functional> |
24 | #include <functional> |
| 25 | |
25 | |
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26 | #include "gettext.h" |
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27 | |
| 26 | #include "slog.h" |
28 | #include "slog.h" |
| 27 | #include "iom.h" |
29 | #include "iom.h" |
| 28 | |
30 | |
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31 | tstamp NOW; |
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32 | bool iom_valid; |
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33 | io_manager iom; |
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34 | |
| 29 | inline bool lowest_first (const time_watcher *a, const time_watcher *b) |
35 | inline bool earliest_first (const time_watcher *a, const time_watcher *b) |
| 30 | { |
36 | { |
| 31 | return a->at > b->at; |
37 | return a->at > b->at; |
| 32 | } |
38 | } |
| 33 | |
39 | |
| 34 | tstamp NOW; |
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| 35 | |
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| 36 | io_manager iom; |
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| 37 | |
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| 38 | void time_watcher::set (tstamp when) |
40 | void time_watcher::set (tstamp when) |
| 39 | { |
41 | { |
| 40 | iom.unreg (this); |
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| 41 | at = when; |
42 | at = when; |
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43 | |
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44 | if (registered) |
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45 | iom.reschedule_time_watchers (); |
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46 | } |
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47 | |
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48 | void time_watcher::trigger () |
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49 | { |
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50 | call (*this); |
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51 | |
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52 | if (registered) |
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53 | iom.reschedule_time_watchers (); |
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54 | else |
| 42 | iom.reg (this); |
55 | iom.reg (this); |
| 43 | } |
56 | } |
| 44 | |
57 | |
| 45 | void io_manager::reg (int fd, short events, io_watcher *w) |
58 | time_watcher::~time_watcher () |
| 46 | { |
59 | { |
| 47 | pollfd pfd; |
60 | if (iom_valid) |
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61 | iom.unreg (this); |
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62 | } |
| 48 | |
63 | |
| 49 | pfd.fd = fd; |
64 | void io_watcher::set(int fd_, short events_) |
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65 | { |
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66 | fd = fd_; |
| 50 | pfd.events = events; |
67 | events = events_; |
| 51 | |
68 | |
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69 | if (registered) |
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70 | { |
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71 | iom.unreg (this); |
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72 | iom.reg (this); |
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73 | } |
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74 | } |
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75 | |
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76 | io_watcher::~io_watcher () |
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77 | { |
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78 | if (iom_valid) |
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79 | iom.unreg (this); |
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80 | } |
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81 | |
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82 | void io_manager::reg (io_watcher *w) |
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83 | { |
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84 | if (!w->registered) |
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85 | { |
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86 | w->registered = true; |
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87 | |
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88 | pollfd pfd; |
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89 | |
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90 | pfd.fd = w->fd; |
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91 | pfd.events = w->events; |
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92 | |
| 52 | pfs.push_back (pfd); |
93 | pfs.push_back (pfd); |
| 53 | iow.push_back (w); |
94 | iow.push_back (w); |
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95 | } |
| 54 | } |
96 | } |
| 55 | |
97 | |
| 56 | void io_manager::unreg (io_watcher *w) |
98 | void io_manager::unreg (io_watcher *w) |
| 57 | { |
99 | { |
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100 | if (w->registered) |
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101 | { |
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102 | w->registered = false; |
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103 | |
| 58 | unsigned int sz = iow.size (); |
104 | unsigned int sz = iow.size (); |
| 59 | unsigned int i = find (iow.begin (), iow.end (), w) - iow.begin (); |
105 | unsigned int i = find (iow.begin (), iow.end (), w) - iow.begin (); |
| 60 | |
106 | |
| 61 | if (i != sz) |
107 | assert (i != sz); |
| 62 | { |
108 | |
| 63 | if (sz == 1) |
109 | if (sz == 1) |
| 64 | { |
110 | { |
| 65 | pfs.clear (); |
111 | pfs.clear (); |
| 66 | iow.clear (); |
112 | iow.clear (); |
| 67 | } |
113 | } |
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| 76 | pfs[i] = pfs[sz - 1]; pfs.pop_back (); |
122 | pfs[i] = pfs[sz - 1]; pfs.pop_back (); |
| 77 | } |
123 | } |
| 78 | } |
124 | } |
| 79 | } |
125 | } |
| 80 | |
126 | |
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127 | void io_manager::reschedule_time_watchers () |
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128 | { |
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129 | make_heap (tw.begin (), tw.end (), earliest_first); |
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130 | } |
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131 | |
| 81 | void io_manager::reg (time_watcher *w) |
132 | void io_manager::reg (time_watcher *w) |
| 82 | { |
133 | { |
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134 | if (!w->registered) |
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135 | { |
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136 | w->registered = true; |
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137 | |
| 83 | tw.push_back (w); |
138 | tw.push_back (w); |
| 84 | push_heap (tw.begin (), tw.end (), lowest_first); |
139 | push_heap (tw.begin (), tw.end (), earliest_first); |
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140 | } |
| 85 | } |
141 | } |
| 86 | |
142 | |
| 87 | void io_manager::unreg (time_watcher *w) |
143 | void io_manager::unreg (time_watcher *w) |
| 88 | { |
144 | { |
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145 | if (w->registered) |
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146 | { |
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147 | w->registered = false; |
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148 | |
| 89 | unsigned int sz = tw.size (); |
149 | unsigned int sz = tw.size (); |
| 90 | unsigned int i = find (tw.begin (), tw.end (), w) - tw.begin (); |
150 | unsigned int i = find (tw.begin (), tw.end (), w) - tw.begin (); |
| 91 | |
151 | |
| 92 | if (i != sz) |
152 | assert (i != sz); |
| 93 | { |
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| 94 | if (sz == 1) |
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| 95 | tw.clear (); |
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| 96 | else |
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| 97 | { |
153 | |
| 98 | if (i != sz - 1) |
154 | if (i != sz - 1) |
| 99 | tw[i] = tw[sz - 1]; |
155 | tw[i] = tw[sz - 1]; |
| 100 | |
156 | |
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157 | tw.pop_back (); |
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158 | reschedule_time_watchers (); |
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159 | } |
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160 | } |
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161 | |
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162 | inline void set_now (void) |
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163 | { |
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164 | struct timeval tv; |
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165 | |
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166 | gettimeofday (&tv, 0); |
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167 | |
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168 | NOW = (tstamp)tv.tv_sec + (tstamp)tv.tv_usec / 1000000; |
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169 | } |
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170 | |
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171 | void io_manager::loop () |
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172 | { |
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173 | set_now (); |
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174 | |
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175 | for (;;) |
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176 | { |
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177 | while (tw[0]->at <= NOW) |
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178 | { |
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179 | // remove the first watcher |
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180 | time_watcher *w = tw[0]; |
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181 | |
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182 | pop_heap (tw.begin (), tw.end (), earliest_first); |
| 101 | tw.pop_back (); |
183 | tw.pop_back (); |
| 102 | make_heap (tw.begin (), tw.end (), lowest_first); |
184 | |
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185 | w->registered = false; |
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186 | |
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187 | // call it |
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188 | w->call (*w); |
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189 | |
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190 | // re-add it if necessary |
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191 | if (w->at >= 0 && !w->registered) |
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192 | reg (w); |
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193 | } |
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194 | |
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195 | int timeout = (int) ((tw[0]->at - NOW) * 1000); |
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196 | |
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197 | int fds = poll (&pfs[0], pfs.size (), timeout); |
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198 | |
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199 | set_now (); |
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200 | |
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201 | vector<io_watcher *>::iterator w; |
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202 | vector<pollfd>::iterator p; |
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203 | |
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204 | for (w = iow.begin (), p = pfs.begin (); |
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205 | fds > 0 && w < iow.end (); |
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206 | ++w, ++p) |
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207 | if (p->revents) |
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208 | { |
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209 | --fds; |
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210 | |
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211 | if (p->revents & POLLNVAL) |
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212 | { |
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213 | slog (L_ERR, _("io_watcher started on illegal file descriptor, disabling.")); |
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214 | (*w)->stop (); |
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215 | } |
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216 | else |
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217 | (*w)->call (**w, p->revents); |
| 103 | } |
218 | } |
| 104 | } |
219 | } |
| 105 | } |
220 | } |
| 106 | |
221 | |
| 107 | inline void set_now (void) |
222 | void io_manager::idle_cb (time_watcher &w) |
| 108 | { |
223 | { |
| 109 | struct timeval tv; |
224 | w.at = NOW + 86400; // wake up every day, for no good reason |
| 110 | |
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| 111 | gettimeofday (&tv, 0); |
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| 112 | |
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| 113 | NOW = (tstamp)tv.tv_sec + (tstamp)tv.tv_usec / 1000000; |
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| 114 | } |
225 | } |
| 115 | |
226 | |
| 116 | void io_manager::loop () |
227 | io_manager::io_manager () |
| 117 | { |
228 | { |
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229 | iom_valid = true; |
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230 | |
| 118 | set_now (); |
231 | set_now (); |
| 119 | |
232 | idle = new time_watcher (this, &io_manager::idle_cb); |
| 120 | while (!(iow.empty () && tw.empty ())) |
233 | idle->start (0); |
| 121 | { |
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| 122 | int timeout = tw.empty () |
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| 123 | ? 3600 * 1000 // wake up at least every hour |
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| 124 | : (int) ((tw[0]->at - NOW) * 1000); |
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| 125 | |
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| 126 | printf ("s%d t%d #%d\n", pfs.size (), timeout, tw.size ()); |
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| 127 | |
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| 128 | if (timeout >= 0) |
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| 129 | { |
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| 130 | int fds = poll (&pfs[0], pfs.size (), timeout); |
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| 131 | |
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| 132 | set_now (); |
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| 133 | |
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| 134 | for (unsigned int i = iow.size (); fds && i--; ) |
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| 135 | if (pfs[i].revents) |
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| 136 | { |
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| 137 | --fds; |
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| 138 | iow[i]->call (pfs[i].revents); |
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| 139 | } |
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| 140 | } |
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| 141 | |
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| 142 | while (!tw.empty () && tw[0]->at <= NOW) |
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| 143 | { |
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| 144 | pop_heap (tw.begin (), tw.end (), lowest_first); |
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| 145 | (*(tw.end () - 1))->trigger (); |
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| 146 | push_heap (tw.begin (), tw.end (), lowest_first); |
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| 147 | } |
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| 148 | } |
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| 149 | } |
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| 150 | |
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| 151 | io_manager::io_manager () |
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| 152 | { |
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| 153 | set_now (); |
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| 154 | } |
234 | } |
| 155 | |
235 | |
| 156 | io_manager::~io_manager () |
236 | io_manager::~io_manager () |
| 157 | { |
237 | { |
| 158 | // |
238 | iom_valid = false; |
| 159 | } |
239 | } |
| 160 | |
240 | |
