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24 | #include <functional> |
24 | #include <functional> |
25 | |
25 | |
26 | #include "slog.h" |
26 | #include "slog.h" |
27 | #include "iom.h" |
27 | #include "iom.h" |
28 | |
28 | |
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29 | tstamp NOW; |
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30 | bool iom_valid; |
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31 | io_manager iom; |
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32 | |
29 | inline bool lowest_first (const time_watcher *a, const time_watcher *b) |
33 | inline bool earliest_first (const time_watcher *a, const time_watcher *b) |
30 | { |
34 | { |
31 | return a->at > b->at; |
35 | return a->at > b->at; |
32 | } |
36 | } |
33 | |
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34 | tstamp NOW; |
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35 | |
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36 | io_manager iom; |
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37 | |
37 | |
38 | void time_watcher::set (tstamp when) |
38 | void time_watcher::set (tstamp when) |
39 | { |
39 | { |
40 | at = when; |
40 | at = when; |
41 | |
41 | |
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45 | iom.reg (this); |
45 | iom.reg (this); |
46 | } |
46 | } |
47 | |
47 | |
48 | void time_watcher::trigger () |
48 | void time_watcher::trigger () |
49 | { |
49 | { |
50 | call (at); |
50 | call (*this); |
51 | |
51 | |
52 | if (registered) |
52 | if (registered) |
53 | iom.reschedule_time_watchers (); |
53 | iom.reschedule_time_watchers (); |
54 | else |
54 | else |
55 | iom.reg (this); |
55 | iom.reg (this); |
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59 | { |
59 | { |
60 | if (!registered) |
60 | if (!registered) |
61 | iom.reg (this); |
61 | iom.reg (this); |
62 | } |
62 | } |
63 | |
63 | |
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64 | time_watcher::~time_watcher () |
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65 | { |
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66 | if (iom_valid) |
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67 | iom.unreg (this); |
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68 | } |
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69 | |
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70 | io_watcher::~io_watcher () |
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71 | { |
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72 | if (iom_valid) |
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73 | iom.unreg (this); |
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74 | } |
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75 | |
64 | void io_manager::reg (int fd, short events, io_watcher *w) |
76 | void io_manager::reg (io_watcher *w) |
65 | { |
77 | { |
66 | pollfd pfd; |
78 | pollfd pfd; |
67 | |
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68 | pfd.fd = fd; |
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69 | pfd.events = events; |
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70 | |
79 | |
71 | pfs.push_back (pfd); |
80 | pfs.push_back (pfd); |
72 | iow.push_back (w); |
81 | iow.push_back (w); |
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82 | |
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83 | w->p = &(*(pfs.end () - 1)); |
73 | } |
84 | } |
74 | |
85 | |
75 | void io_manager::unreg (io_watcher *w) |
86 | void io_manager::unreg (io_watcher *w) |
76 | { |
87 | { |
77 | unsigned int sz = iow.size (); |
88 | if (w->p) |
78 | unsigned int i = find (iow.begin (), iow.end (), w) - iow.begin (); |
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79 | |
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80 | if (i != sz) |
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81 | { |
89 | { |
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90 | unsigned int sz = iow.size (); |
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91 | unsigned int i = find (iow.begin (), iow.end (), w) - iow.begin (); |
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92 | |
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93 | assert (i != sz); |
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94 | |
82 | if (sz == 1) |
95 | if (sz == 1) |
83 | { |
96 | { |
84 | pfs.clear (); |
97 | pfs.clear (); |
85 | iow.clear (); |
98 | iow.clear (); |
86 | } |
99 | } |
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92 | else |
105 | else |
93 | { |
106 | { |
94 | iow[i] = iow[sz - 1]; iow.pop_back (); |
107 | iow[i] = iow[sz - 1]; iow.pop_back (); |
95 | pfs[i] = pfs[sz - 1]; pfs.pop_back (); |
108 | pfs[i] = pfs[sz - 1]; pfs.pop_back (); |
96 | } |
109 | } |
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110 | |
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111 | w->p = 0; |
97 | } |
112 | } |
98 | } |
113 | } |
99 | |
114 | |
100 | void io_manager::reschedule_time_watchers () |
115 | void io_manager::reschedule_time_watchers () |
101 | { |
116 | { |
102 | make_heap (tw.begin (), tw.end (), lowest_first); |
117 | make_heap (tw.begin (), tw.end (), earliest_first); |
103 | } |
118 | } |
104 | |
119 | |
105 | void io_manager::reg (time_watcher *w) |
120 | void io_manager::reg (time_watcher *w) |
106 | { |
121 | { |
107 | if (w->registered) |
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108 | slog (L_CRIT, "FATAL: io_manager::reg(time_watcher) called on already-registered watcher"); |
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109 | |
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110 | w->registered = true; |
122 | w->registered = true; |
111 | |
123 | |
112 | tw.push_back (w); |
124 | tw.push_back (w); |
113 | push_heap (tw.begin (), tw.end (), lowest_first); |
125 | push_heap (tw.begin (), tw.end (), earliest_first); |
114 | } |
126 | } |
115 | |
127 | |
116 | void io_manager::unreg (time_watcher *w) |
128 | void io_manager::unreg (time_watcher *w) |
117 | { |
129 | { |
118 | if (w->registered) |
130 | if (w->registered) |
119 | { |
131 | { |
120 | unsigned int sz = tw.size (); |
132 | unsigned int sz = tw.size (); |
121 | unsigned int i = find (tw.begin (), tw.end (), w) - tw.begin (); |
133 | unsigned int i = find (tw.begin (), tw.end (), w) - tw.begin (); |
122 | |
134 | |
123 | if (i != sz) |
135 | assert (i != sz); |
124 | { |
136 | |
125 | if (i != sz - 1) |
137 | if (i != sz - 1) |
126 | tw[i] = tw[sz - 1]; |
138 | tw[i] = tw[sz - 1]; |
127 | |
139 | |
128 | tw.pop_back (); |
140 | tw.pop_back (); |
129 | reschedule_time_watchers (); |
141 | reschedule_time_watchers (); |
130 | } |
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131 | |
142 | |
132 | w->registered = false; |
143 | w->registered = false; |
133 | } |
144 | } |
134 | } |
145 | } |
135 | |
146 | |
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151 | while (tw[0]->at <= NOW) |
162 | while (tw[0]->at <= NOW) |
152 | { |
163 | { |
153 | // remove the first watcher |
164 | // remove the first watcher |
154 | time_watcher *w = tw[0]; |
165 | time_watcher *w = tw[0]; |
155 | |
166 | |
156 | pop_heap (tw.begin (), tw.end (), lowest_first); |
167 | pop_heap (tw.begin (), tw.end (), earliest_first); |
157 | tw.pop_back (); |
168 | tw.pop_back (); |
158 | |
169 | |
159 | w->registered = false; |
170 | w->registered = false; |
160 | |
171 | |
161 | // call it |
172 | // call it |
162 | w->call (w->at); |
173 | w->call (*w); |
163 | |
174 | |
164 | // re-add it if necessary |
175 | // re-add it if necessary |
165 | if (w->at >= 0 && !w->registered) |
176 | if (w->at >= 0 && !w->registered) |
166 | reg (w); |
177 | reg (w); |
167 | } |
178 | } |
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170 | |
181 | |
171 | int fds = poll (&pfs[0], pfs.size (), timeout); |
182 | int fds = poll (&pfs[0], pfs.size (), timeout); |
172 | |
183 | |
173 | set_now (); |
184 | set_now (); |
174 | |
185 | |
175 | for (unsigned int i = iow.size (); fds > 0 && i--; ) |
186 | vector<io_watcher *>::iterator w; |
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187 | vector<pollfd>::iterator p; |
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188 | |
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189 | for (w = iow.begin (), p = pfs.begin (); |
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190 | fds > 0 && w < iow.end (); |
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191 | ++w, ++p) |
176 | if (pfs[i].revents) |
192 | if (p->revents) |
177 | { |
193 | { |
178 | --fds; |
194 | --fds; |
179 | iow[i]->call (pfs[i].revents); |
195 | (*w)->call (**w, p->revents); |
180 | } |
196 | } |
181 | } |
197 | } |
182 | } |
198 | } |
183 | |
199 | |
184 | void io_manager::idle_cb (tstamp &ts) |
200 | void io_manager::idle_cb (time_watcher &w) |
185 | { |
201 | { |
186 | ts = NOW + 86400; // wake up every day, for no good reason |
202 | w.at = NOW + 86400; // wake up every day, for no good reason |
187 | } |
203 | } |
188 | |
204 | |
189 | io_manager::io_manager () |
205 | io_manager::io_manager () |
190 | { |
206 | { |
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207 | iom_valid = true; |
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208 | |
191 | set_now (); |
209 | set_now (); |
192 | idle = new time_watcher (this, &io_manager::idle_cb); |
210 | idle = new time_watcher (this, &io_manager::idle_cb); |
193 | idle->start (0); |
211 | idle->start (0); |
194 | } |
212 | } |
195 | |
213 | |
196 | io_manager::~io_manager () |
214 | io_manager::~io_manager () |
197 | { |
215 | { |
198 | // |
216 | iom_valid = false; |
199 | } |
217 | } |
200 | |
218 | |