1 | /* |
1 | /* |
2 | iom.h -- generic I/O multiplexer |
2 | iom.h -- generic I/O multiplexer |
3 | Copyright (C) 2003, 2004 Marc Lehmann <gvpe@schmorp.de> |
3 | Copyright (C) 2003-2006 Marc Lehmann <gvpe@schmorp.de> |
4 | |
4 | |
5 | This file is part of GVPE. |
5 | This file is part of GVPE. |
6 | |
6 | |
7 | GVPE is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify |
8 | 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 |
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26 | // - a vector template like simplevec or stl's vector |
26 | // - a vector template like simplevec or stl's vector |
27 | // - defines for all watcher types required in your app |
27 | // - defines for all watcher types required in your app |
28 | // edit iom_conf.h as appropriate. |
28 | // edit iom_conf.h as appropriate. |
29 | #include "iom_conf.h" |
29 | #include "iom_conf.h" |
30 | |
30 | |
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31 | #if IOM_CHILD |
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32 | # undef IOM_SIG |
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33 | # define IOM_SIG 1 |
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34 | #endif |
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35 | |
31 | #include "callback.h" |
36 | #include "callback.h" |
32 | |
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33 | #ifndef IOM_IO |
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34 | # define IOM_IO 0 |
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35 | #endif |
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36 | #ifndef IOM_TIME |
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37 | # define IOM_TIME 0 |
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38 | #endif |
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39 | #ifndef IOM_CHECK |
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40 | # define IOM_CHECK 0 |
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41 | #endif |
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42 | #ifndef IOM_IDLE |
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43 | # define IOM_IDLE 0 |
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44 | #endif |
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45 | #ifndef IOM_SIG |
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46 | # define IOM_SIG 0 |
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47 | #endif |
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48 | |
37 | |
49 | typedef double tstamp; |
38 | typedef double tstamp; |
50 | extern tstamp NOW; |
39 | extern tstamp NOW; |
51 | |
40 | |
52 | // TSTAMP_MAX must still fit into a positive struct timeval |
41 | // TSTAMP_MAX must still fit into a positive struct timeval |
53 | #define TSTAMP_MAX (double)(1UL<<31) |
42 | #define TSTAMP_MAX (double)(1UL<<31) |
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43 | |
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44 | //#define IOM_LIBEVENT "event.h" *NOT* a supported feature |
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45 | #ifdef IOM_LIBEVENT |
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46 | # include <sys/time.h> |
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47 | # include IOM_LIBEVENT |
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48 | # undef IOM_IO |
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49 | # define IOM_IO 1 |
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50 | #endif |
54 | |
51 | |
55 | struct watcher; |
52 | struct watcher; |
56 | #if IOM_IO |
53 | #if IOM_IO |
57 | struct io_watcher; |
54 | struct io_watcher; |
58 | #endif |
55 | #endif |
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65 | #if IOM_IDLE |
62 | #if IOM_IDLE |
66 | struct idle_watcher; |
63 | struct idle_watcher; |
67 | #endif |
64 | #endif |
68 | #if IOM_SIG |
65 | #if IOM_SIG |
69 | struct sig_watcher; |
66 | struct sig_watcher; |
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67 | #endif |
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68 | #if IOM_CHILD |
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69 | struct child_watcher; |
70 | #endif |
70 | #endif |
71 | |
71 | |
72 | template<class watcher> |
72 | template<class watcher> |
73 | struct io_manager_vec : vector<watcher *> { |
73 | struct io_manager_vec : vector<watcher *> { |
74 | void erase_unordered (unsigned int pos) |
74 | void erase_unordered (unsigned int pos) |
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98 | // set NOW |
98 | // set NOW |
99 | static void set_now (); |
99 | static void set_now (); |
100 | #endif |
100 | #endif |
101 | |
101 | |
102 | // register a watcher |
102 | // register a watcher |
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103 | #ifndef IOM_LIBEVENT |
103 | #if IOM_IO |
104 | #if IOM_IO |
104 | static void reg (io_watcher &w); static void unreg (io_watcher &w); |
105 | static void reg (io_watcher &w); static void unreg (io_watcher &w); |
105 | #endif |
106 | #endif |
106 | #if IOM_TIME |
107 | #if IOM_TIME |
107 | static void reg (time_watcher &w); static void unreg (time_watcher &w); |
108 | static void reg (time_watcher &w); static void unreg (time_watcher &w); |
108 | #endif |
109 | #endif |
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110 | #if IOM_SIG |
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111 | static void reg (sig_watcher &w); static void unreg (sig_watcher &w); |
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112 | #endif |
109 | #if IOM_CHECK |
113 | #if IOM_CHECK |
110 | static void reg (check_watcher &w); static void unreg (check_watcher &w); |
114 | static void reg (check_watcher &w); static void unreg (check_watcher &w); |
111 | #endif |
115 | #endif |
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116 | #endif |
112 | #if IOM_IDLE |
117 | #if IOM_IDLE |
113 | static void reg (idle_watcher &w); static void unreg (idle_watcher &w); |
118 | static void reg (idle_watcher &w); static void unreg (idle_watcher &w); |
114 | #endif |
119 | #endif |
115 | #if IOM_SIG |
120 | #if IOM_CHILD |
116 | static void reg (sig_watcher &w); static void unreg (sig_watcher &w); |
121 | static void reg (child_watcher &w); static void unreg (child_watcher &w); |
117 | #endif |
122 | #endif |
118 | |
123 | |
119 | static void loop (); |
124 | static void loop (); |
120 | }; |
125 | }; |
121 | |
126 | |
122 | struct watcher { |
127 | struct watcher { |
123 | int active; /* 0 == inactive, else index into respective vector */ |
128 | int active; /* 0 == inactive, else index into respective vector */ |
124 | |
129 | |
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130 | bool is_active () { return active; } |
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131 | |
125 | watcher () : active (0) { } |
132 | watcher () : active (0) { } |
126 | }; |
133 | }; |
127 | |
134 | |
128 | #if IOM_IO |
135 | #if IOM_IO |
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136 | #ifdef IOM_LIBEVENT |
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137 | enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = EV_READ, EVENT_WRITE = EV_WRITE }; |
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138 | |
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139 | void iom_io_c_callback (int fd, short events, void *data); |
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140 | |
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141 | struct io_watcher : watcher, callback<void (io_watcher &, short)> { |
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142 | struct event ev; |
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143 | int fd; |
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144 | |
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145 | void set (int fd_, short events_) { fd = fd_; event_set (&ev, fd_, events_, iom_io_c_callback, (void *)this); } |
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146 | |
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147 | void set (short events_) { set (fd, events_); } |
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148 | void start () { event_add (&ev, 0); active = 1; } |
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149 | void start (int fd_, short events_) { set (fd_, events_); start (); } |
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150 | void stop () { if (active) event_del (&ev); active = 0; } |
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151 | |
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152 | template<class O, class M> |
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153 | io_watcher (O object, M method) |
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154 | : callback<void (io_watcher &, short)> (object, method) |
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155 | { } |
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156 | ~io_watcher () { stop (); } |
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157 | }; |
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158 | #else |
129 | enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = 1, EVENT_WRITE = 2 }; |
159 | enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = 1, EVENT_WRITE = 2 }; |
130 | |
160 | |
131 | struct io_watcher : watcher, callback2<void, io_watcher &, short> { |
161 | struct io_watcher : watcher, callback<void (io_watcher &, short)> { |
132 | int fd; |
162 | int fd; |
133 | short events; |
163 | short events; |
134 | |
164 | |
135 | void set (int fd_, short events_) { fd = fd_; events = events_; } |
165 | void set (int fd_, short events_) { fd = fd_; events = events_; } |
136 | |
166 | |
137 | void set (short events_) { set (fd, events_); } |
167 | void set (short events_) { set (fd, events_); } |
138 | void start () { io_manager::reg (*this); } |
168 | void start () { io_manager::reg (*this); } |
139 | void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); } |
169 | void start (int fd_, short events_) { set (fd_, events_); start (); } |
140 | void stop () { io_manager::unreg (*this); } |
170 | void stop () { io_manager::unreg (*this); } |
141 | |
171 | |
142 | template<class O1, class O2> |
172 | template<class O, class M> |
143 | io_watcher (O1 *object, void (O2::*method) (io_watcher &, short)) |
173 | io_watcher (O object, M method) |
144 | : callback2<void, io_watcher &, short> (object,method) |
174 | : callback<void (io_watcher &, short)> (object, method) |
145 | { } |
175 | { } |
146 | ~io_watcher () { stop (); } |
176 | ~io_watcher () { stop (); } |
147 | }; |
177 | }; |
148 | #endif |
178 | #endif |
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179 | #endif |
149 | |
180 | |
150 | #if IOM_TIME |
181 | #if IOM_TIME |
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182 | #ifdef IOM_LIBEVENT |
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183 | void iom_time_c_callback (int fd, short events, void *data); |
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184 | |
151 | struct time_watcher : watcher, callback1<void, time_watcher &> { |
185 | struct time_watcher : watcher, callback<void (time_watcher &)> { |
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186 | struct event ev; |
152 | tstamp at; |
187 | tstamp at; |
153 | |
188 | |
154 | void trigger (); |
189 | void trigger (); |
155 | |
190 | |
156 | void set (tstamp when) { at = when; } |
191 | void set (tstamp when) { at = when; } |
157 | void operator () () { trigger (); } |
192 | void operator () () { trigger (); } |
158 | void start () { io_manager::reg (*this); } |
193 | void start () |
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194 | { |
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195 | struct timeval tv; |
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196 | tv.tv_sec = (long)at; |
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197 | tv.tv_usec = (long)((at - (tstamp)tv.tv_sec) * 1000000.); |
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198 | evtimer_add (&ev, &tv); |
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199 | active = 1; |
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200 | } |
159 | void start (tstamp when) { set (when); io_manager::reg (*this); } |
201 | void start (tstamp when) { set (when); start (); } |
160 | void stop () { io_manager::unreg (*this); } |
202 | void stop () { if (active) evtimer_del (&ev); active = 0; } |
161 | |
203 | |
162 | template<class O1, class O2> |
204 | template<class O, class M> |
163 | time_watcher (O1 *object, void (O2::*method) (time_watcher &)) |
205 | time_watcher (O object, M method) |
164 | : callback1<void, time_watcher &> (object,method), at (0) |
206 | : callback<void (time_watcher &)> (object, method), at (0) |
165 | { } |
207 | { |
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208 | evtimer_set (&ev, iom_time_c_callback, (void *)this); |
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209 | } |
166 | ~time_watcher () { stop (); } |
210 | ~time_watcher () { stop (); } |
167 | }; |
211 | }; |
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212 | #else |
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213 | struct time_watcher : watcher, callback<void (time_watcher &)> { |
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214 | tstamp at; |
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215 | |
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216 | void trigger (); |
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217 | |
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218 | void set (tstamp when) { at = when; } |
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219 | void operator () () { trigger (); } |
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220 | void start () { io_manager::reg (*this); } |
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221 | void start (tstamp when) { set (when); start (); } |
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222 | void stop () { io_manager::unreg (*this); } |
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223 | |
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224 | template<class O, class M> |
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225 | time_watcher (O object, M method) |
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226 | : callback<void (time_watcher &)> (object, method), at (0) |
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227 | { } |
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228 | ~time_watcher () { stop (); } |
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229 | }; |
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230 | #endif |
168 | #endif |
231 | #endif |
169 | |
232 | |
170 | #if IOM_CHECK |
233 | #if IOM_CHECK |
171 | // run before checking for new events |
234 | // run before checking for new events |
172 | struct check_watcher : watcher, callback1<void, check_watcher &> { |
235 | struct check_watcher : watcher, callback<void (check_watcher &)> { |
173 | void start () { io_manager::reg (*this); } |
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174 | void stop () { io_manager::unreg (*this); } |
236 | void start () { io_manager::reg (*this); } |
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237 | void stop () { io_manager::unreg (*this); } |
175 | |
238 | |
176 | template<class O1, class O2> |
239 | template<class O, class M> |
177 | check_watcher (O1 *object, void (O2::*method) (check_watcher &)) |
240 | check_watcher (O object, M method) |
178 | : callback1<void, check_watcher &> (object,method) |
241 | : callback<void (check_watcher &)> (object, method) |
179 | { } |
242 | { } |
180 | ~check_watcher () { stop (); } |
243 | ~check_watcher () { stop (); } |
181 | }; |
244 | }; |
182 | #endif |
245 | #endif |
183 | |
246 | |
184 | #if IOM_IDLE |
247 | #if IOM_IDLE |
185 | // run after checking for any i/o, but before waiting |
248 | // run after checking for any i/o, but before waiting |
186 | struct idle_watcher : watcher, callback1<void, idle_watcher &> { |
249 | struct idle_watcher : watcher, callback<void (idle_watcher &)> { |
187 | void start () { io_manager::reg (*this); } |
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188 | void stop () { io_manager::unreg (*this); } |
250 | void start () { io_manager::reg (*this); } |
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251 | void stop () { io_manager::unreg (*this); } |
189 | |
252 | |
190 | template<class O1, class O2> |
253 | template<class O, class M> |
191 | idle_watcher (O1 *object, void (O2::*method) (idle_watcher &)) |
254 | idle_watcher (O object, M method) |
192 | : callback1<void, idle_watcher &> (object,method) |
255 | : callback<void (idle_watcher &)> (object, method) |
193 | { } |
256 | { } |
194 | ~idle_watcher () { stop (); } |
257 | ~idle_watcher () { stop (); } |
195 | }; |
258 | }; |
196 | #endif |
259 | #endif |
197 | |
260 | |
198 | #if IOM_SIG |
261 | #if IOM_SIG |
199 | struct sig_watcher : watcher, callback1<void, sig_watcher &> { |
262 | struct sig_watcher : watcher, callback<void (sig_watcher &)> { |
200 | int signum; |
263 | int signum; |
201 | |
264 | |
202 | void start (int signum); |
265 | void start (int signum); |
203 | void stop () { io_manager::unreg (*this); } |
266 | void stop () { io_manager::unreg (*this); } |
204 | |
267 | |
205 | template<class O1, class O2> |
268 | template<class O, class M> |
206 | sig_watcher (O1 *object, void (O2::*method) (sig_watcher &)) |
269 | sig_watcher (O object, M method) |
207 | : callback1<void, sig_watcher &> (object,method), signum (-1) |
270 | : callback<void(sig_watcher &)> (object, method), signum (0) |
208 | { } |
271 | { } |
209 | ~sig_watcher () { stop (); } |
272 | ~sig_watcher () { stop (); } |
210 | }; |
273 | }; |
211 | #endif |
274 | #endif |
212 | |
275 | |
213 | #endif |
276 | #if IOM_CHILD |
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277 | struct child_watcher : watcher, callback<void (child_watcher &, int)> { |
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278 | int /*pid_t*/ pid; |
214 | |
279 | |
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280 | void start (int pid) { this->pid = pid; io_manager::reg (*this); } |
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281 | void stop () { io_manager::unreg (*this); } |
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282 | |
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283 | template<class O, class M> |
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284 | child_watcher (O object, M method) |
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285 | : callback<void (child_watcher &, int)> (object, method), pid (0) |
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286 | { } |
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287 | ~child_watcher () { stop (); } |
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288 | }; |
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289 | #endif |
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290 | |
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291 | #endif |
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292 | |