| 1 | /* |
1 | /* |
| 2 | iom.C -- I/O multiplexor |
2 | iom.C -- generic I/O multiplexor |
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3 | Copyright (C) 2003 Marc Lehmann <pcg@goof.com> |
| 3 | |
4 | |
| 4 | This program is free software; you can redistribute it and/or modify |
5 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
6 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 2 of the License, or |
7 | the Free Software Foundation; either version 2 of the License, or |
| 7 | (at your option) any later version. |
8 | (at your option) any later version. |
| … | |
… | |
| 21 | #include <sys/time.h> |
22 | #include <sys/time.h> |
| 22 | |
23 | |
| 23 | #include <algorithm> |
24 | #include <algorithm> |
| 24 | #include <functional> |
25 | #include <functional> |
| 25 | |
26 | |
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27 | #include "gettext.h" |
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28 | |
| 26 | #include "slog.h" |
29 | #include "slog.h" |
| 27 | #include "iom.h" |
30 | #include "iom.h" |
| 28 | |
31 | |
| 29 | tstamp NOW; |
32 | tstamp NOW; |
| 30 | bool iom_valid; |
33 | bool iom_valid; |
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… | |
| 36 | } |
39 | } |
| 37 | |
40 | |
| 38 | void time_watcher::set (tstamp when) |
41 | void time_watcher::set (tstamp when) |
| 39 | { |
42 | { |
| 40 | at = when; |
43 | at = when; |
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44 | |
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45 | if (registered) |
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46 | iom.reschedule_time_watchers (); |
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47 | } |
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48 | |
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49 | void time_watcher::trigger () |
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50 | { |
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51 | call (*this); |
| 41 | |
52 | |
| 42 | if (registered) |
53 | if (registered) |
| 43 | iom.reschedule_time_watchers (); |
54 | iom.reschedule_time_watchers (); |
| 44 | else |
55 | else |
| 45 | iom.reg (this); |
56 | iom.reg (this); |
| 46 | } |
57 | } |
| 47 | |
58 | |
| 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 |
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| 55 | iom.reg (this); |
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| 56 | } |
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| 57 | |
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| 58 | void time_watcher::start () |
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| 59 | { |
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| 60 | if (!registered) |
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| 61 | iom.reg (this); |
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| 62 | } |
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| 63 | |
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| 64 | time_watcher::~time_watcher () |
59 | time_watcher::~time_watcher () |
| 65 | { |
60 | { |
| 66 | if (iom_valid) |
61 | if (iom_valid) |
| 67 | iom.unreg (this); |
62 | iom.unreg (this); |
| 68 | } |
63 | } |
| 69 | |
64 | |
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65 | void io_watcher::set(int fd_, short events_) |
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66 | { |
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67 | fd = fd_; |
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68 | events = events_; |
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69 | |
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70 | if (registered) |
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71 | { |
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72 | iom.unreg (this); |
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73 | iom.reg (this); |
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74 | } |
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75 | } |
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76 | |
| 70 | io_watcher::~io_watcher () |
77 | io_watcher::~io_watcher () |
| 71 | { |
78 | { |
| 72 | if (iom_valid) |
79 | if (iom_valid) |
| 73 | iom.unreg (this); |
80 | iom.unreg (this); |
| 74 | } |
81 | } |
| 75 | |
82 | |
| 76 | void io_manager::reg (io_watcher *w) |
83 | void io_manager::reg (io_watcher *w) |
| 77 | { |
84 | { |
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85 | if (!w->registered) |
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86 | { |
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87 | w->registered = true; |
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88 | |
| 78 | pollfd pfd; |
89 | pollfd pfd; |
| 79 | |
90 | |
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91 | pfd.fd = w->fd; |
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92 | pfd.events = w->events; |
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93 | |
| 80 | pfs.push_back (pfd); |
94 | pfs.push_back (pfd); |
| 81 | iow.push_back (w); |
95 | iow.push_back (w); |
| 82 | |
96 | } |
| 83 | w->p = &(*(pfs.end () - 1)); |
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| 84 | } |
97 | } |
| 85 | |
98 | |
| 86 | void io_manager::unreg (io_watcher *w) |
99 | void io_manager::unreg (io_watcher *w) |
| 87 | { |
100 | { |
| 88 | if (w->p) |
101 | if (w->registered) |
| 89 | { |
102 | { |
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103 | w->registered = false; |
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104 | |
| 90 | unsigned int sz = iow.size (); |
105 | unsigned int sz = iow.size (); |
| 91 | unsigned int i = find (iow.begin (), iow.end (), w) - iow.begin (); |
106 | unsigned int i = find (iow.begin (), iow.end (), w) - iow.begin (); |
| 92 | |
107 | |
| 93 | assert (i != sz); |
108 | assert (i != sz); |
| 94 | |
109 | |
| … | |
… | |
| 105 | else |
120 | else |
| 106 | { |
121 | { |
| 107 | iow[i] = iow[sz - 1]; iow.pop_back (); |
122 | iow[i] = iow[sz - 1]; iow.pop_back (); |
| 108 | pfs[i] = pfs[sz - 1]; pfs.pop_back (); |
123 | pfs[i] = pfs[sz - 1]; pfs.pop_back (); |
| 109 | } |
124 | } |
| 110 | |
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| 111 | w->p = 0; |
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| 112 | } |
125 | } |
| 113 | } |
126 | } |
| 114 | |
127 | |
| 115 | void io_manager::reschedule_time_watchers () |
128 | void io_manager::reschedule_time_watchers () |
| 116 | { |
129 | { |
| 117 | make_heap (tw.begin (), tw.end (), earliest_first); |
130 | make_heap (tw.begin (), tw.end (), earliest_first); |
| 118 | } |
131 | } |
| 119 | |
132 | |
| 120 | void io_manager::reg (time_watcher *w) |
133 | void io_manager::reg (time_watcher *w) |
| 121 | { |
134 | { |
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135 | if (!w->registered) |
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136 | { |
| 122 | w->registered = true; |
137 | w->registered = true; |
| 123 | |
138 | |
| 124 | tw.push_back (w); |
139 | tw.push_back (w); |
| 125 | push_heap (tw.begin (), tw.end (), earliest_first); |
140 | push_heap (tw.begin (), tw.end (), earliest_first); |
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141 | } |
| 126 | } |
142 | } |
| 127 | |
143 | |
| 128 | void io_manager::unreg (time_watcher *w) |
144 | void io_manager::unreg (time_watcher *w) |
| 129 | { |
145 | { |
| 130 | if (w->registered) |
146 | if (w->registered) |
| 131 | { |
147 | { |
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148 | w->registered = false; |
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149 | |
| 132 | unsigned int sz = tw.size (); |
150 | unsigned int sz = tw.size (); |
| 133 | unsigned int i = find (tw.begin (), tw.end (), w) - tw.begin (); |
151 | unsigned int i = find (tw.begin (), tw.end (), w) - tw.begin (); |
| 134 | |
152 | |
| 135 | assert (i != sz); |
153 | assert (i != sz); |
| 136 | |
154 | |
| 137 | if (i != sz - 1) |
155 | if (i != sz - 1) |
| 138 | tw[i] = tw[sz - 1]; |
156 | tw[i] = tw[sz - 1]; |
| 139 | |
157 | |
| 140 | tw.pop_back (); |
158 | tw.pop_back (); |
| 141 | reschedule_time_watchers (); |
159 | reschedule_time_watchers (); |
| 142 | |
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| 143 | w->registered = false; |
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| 144 | } |
160 | } |
| 145 | } |
161 | } |
| 146 | |
162 | |
| 147 | inline void set_now (void) |
163 | inline void set_now (void) |
| 148 | { |
164 | { |
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| 190 | fds > 0 && w < iow.end (); |
206 | fds > 0 && w < iow.end (); |
| 191 | ++w, ++p) |
207 | ++w, ++p) |
| 192 | if (p->revents) |
208 | if (p->revents) |
| 193 | { |
209 | { |
| 194 | --fds; |
210 | --fds; |
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211 | |
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212 | if (p->revents & POLLNVAL) |
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213 | { |
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214 | slog (L_ERR, _("io_watcher started on illegal file descriptor, disabling.")); |
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215 | (*w)->stop (); |
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216 | } |
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217 | else |
| 195 | (*w)->call (**w, p->revents); |
218 | (*w)->call (**w, p->revents); |
| 196 | } |
219 | } |
| 197 | } |
220 | } |
| 198 | } |
221 | } |
| 199 | |
222 | |
| 200 | void io_manager::idle_cb (time_watcher &w) |
223 | void io_manager::idle_cb (time_watcher &w) |
