1 | /* |
1 | /* |
2 | iom.h -- generic I/O multiplexer |
2 | iom.h -- 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. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
19 | Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
18 | */ |
20 | */ |
19 | |
21 | |
20 | #ifndef IOM_H__ |
22 | #ifndef IOM_H__ |
21 | #define IOM_H__ |
23 | #define IOM_H__ |
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24 | // - a vector template like simplevec or stl's vector |
26 | // - a vector template like simplevec or stl's vector |
25 | // - defines for all watcher types required in your app |
27 | // - defines for all watcher types required in your app |
26 | // edit iom_conf.h as appropriate. |
28 | // edit iom_conf.h as appropriate. |
27 | #include "iom_conf.h" |
29 | #include "iom_conf.h" |
28 | |
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 | |
29 | #include "callback.h" |
36 | #include "callback.h" |
30 | |
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31 | #ifndef IOM_IO |
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32 | # define IOM_IO 0 |
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33 | #endif |
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34 | #ifndef IOM_TIME |
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35 | # define IOM_TIME 0 |
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36 | #endif |
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37 | #ifndef IOM_CHECK |
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38 | # define IOM_CHECK 0 |
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39 | #endif |
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40 | #ifndef IOM_IDLE |
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41 | # define IOM_IDLE 0 |
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42 | #endif |
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43 | #ifndef IOM_SIG |
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44 | # define IOM_SIG 0 |
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45 | #endif |
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46 | |
37 | |
47 | typedef double tstamp; |
38 | typedef double tstamp; |
48 | extern tstamp NOW; |
39 | extern tstamp NOW; |
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40 | |
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41 | // TSTAMP_MAX must still fit into a positive struct timeval |
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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 |
49 | |
51 | |
50 | struct watcher; |
52 | struct watcher; |
51 | #if IOM_IO |
53 | #if IOM_IO |
52 | struct io_watcher; |
54 | struct io_watcher; |
53 | #endif |
55 | #endif |
… | |
… | |
60 | #if IOM_IDLE |
62 | #if IOM_IDLE |
61 | struct idle_watcher; |
63 | struct idle_watcher; |
62 | #endif |
64 | #endif |
63 | #if IOM_SIG |
65 | #if IOM_SIG |
64 | 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; |
65 | #endif |
70 | #endif |
66 | |
71 | |
67 | template<class watcher> |
72 | template<class watcher> |
68 | struct io_manager_vec : vector<watcher *> { |
73 | struct io_manager_vec : vector<watcher *> { |
69 | void erase_unordered (unsigned int pos) |
74 | void erase_unordered (unsigned int pos) |
… | |
… | |
93 | // set NOW |
98 | // set NOW |
94 | static void set_now (); |
99 | static void set_now (); |
95 | #endif |
100 | #endif |
96 | |
101 | |
97 | // register a watcher |
102 | // register a watcher |
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103 | #ifndef IOM_LIBEVENT |
98 | #if IOM_IO |
104 | #if IOM_IO |
99 | 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); |
100 | #endif |
106 | #endif |
101 | #if IOM_TIME |
107 | #if IOM_TIME |
102 | 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); |
103 | #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 |
104 | #if IOM_CHECK |
113 | #if IOM_CHECK |
105 | 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); |
106 | #endif |
115 | #endif |
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116 | #endif |
107 | #if IOM_IDLE |
117 | #if IOM_IDLE |
108 | 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); |
109 | #endif |
119 | #endif |
110 | #if IOM_SIG |
120 | #if IOM_CHILD |
111 | 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); |
112 | #endif |
122 | #endif |
113 | |
123 | |
114 | static void loop (); |
124 | static void loop (); |
115 | }; |
125 | }; |
116 | |
126 | |
117 | struct watcher { |
127 | struct watcher { |
118 | int active; /* 0 == inactive, else index into respective vector */ |
128 | int active; /* 0 == inactive, else index into respective vector */ |
119 | |
129 | |
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130 | bool is_active () { return active; } |
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131 | |
120 | watcher () : active (0) { } |
132 | watcher () : active (0) { } |
121 | }; |
133 | }; |
122 | |
134 | |
123 | #if IOM_IO |
135 | #if IOM_IO |
124 | enum { EVENT_READ = 1, EVENT_WRITE = 2 }; |
136 | #ifdef IOM_LIBEVENT |
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137 | enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = EV_READ, EVENT_WRITE = EV_WRITE }; |
125 | |
138 | |
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139 | void iom_io_c_callback (int fd, short events, void *data); |
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140 | |
126 | struct io_watcher : watcher, callback2<void, io_watcher &, short> { |
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 |
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159 | enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = 1, EVENT_WRITE = 2 }; |
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160 | |
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161 | struct io_watcher : watcher, callback<void (io_watcher &, short)> { |
127 | int fd; |
162 | int fd; |
128 | short events; |
163 | short events; |
129 | |
164 | |
130 | void set (int fd_, short events_) { fd = fd_; events = events_; } |
165 | void set (int fd_, short events_) { fd = fd_; events = events_; } |
131 | |
166 | |
132 | void set (short events_) { set (fd, events_); } |
167 | void set (short events_) { set (fd, events_); } |
133 | void start () { io_manager::reg (*this); } |
168 | void start () { io_manager::reg (*this); } |
134 | void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); } |
169 | void start (int fd_, short events_) { set (fd_, events_); start (); } |
135 | void stop () { io_manager::unreg (*this); } |
170 | void stop () { io_manager::unreg (*this); } |
136 | |
171 | |
137 | template<class O1, class O2> |
172 | template<class O, class M> |
138 | io_watcher (O1 *object, void (O2::*method) (io_watcher &, short)) |
173 | io_watcher (O object, M method) |
139 | : callback2<void, io_watcher &, short> (object,method) |
174 | : callback<void (io_watcher &, short)> (object, method) |
140 | { } |
175 | { } |
141 | ~io_watcher () { stop (); } |
176 | ~io_watcher () { stop (); } |
142 | }; |
177 | }; |
143 | #endif |
178 | #endif |
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179 | #endif |
144 | |
180 | |
145 | #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 | |
146 | 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; |
147 | tstamp at; |
187 | tstamp at; |
148 | |
188 | |
149 | void trigger (); |
189 | void trigger (); |
150 | |
190 | |
151 | void set (tstamp when) { at = when; } |
191 | void set (tstamp when) { at = when; } |
152 | void operator () () { trigger (); } |
192 | void operator () () { trigger (); } |
153 | 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 | } |
154 | void start (tstamp when) { set (when); io_manager::reg (*this); } |
201 | void start (tstamp when) { set (when); start (); } |
155 | void stop () { io_manager::unreg (*this); } |
202 | void stop () { if (active) evtimer_del (&ev); active = 0; } |
156 | |
203 | |
157 | template<class O1, class O2> |
204 | template<class O, class M> |
158 | time_watcher (O1 *object, void (O2::*method) (time_watcher &)) |
205 | time_watcher (O object, M method) |
159 | : callback1<void, time_watcher &> (object,method), at (0) |
206 | : callback<void (time_watcher &)> (object, method), at (0) |
160 | { } |
207 | { |
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208 | evtimer_set (&ev, iom_time_c_callback, (void *)this); |
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209 | } |
161 | ~time_watcher () { stop (); } |
210 | ~time_watcher () { stop (); } |
162 | }; |
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 |
163 | #endif |
231 | #endif |
164 | |
232 | |
165 | #if IOM_CHECK |
233 | #if IOM_CHECK |
166 | // run before checking for new events |
234 | // run before checking for new events |
167 | struct check_watcher : watcher, callback1<void, check_watcher &> { |
235 | struct check_watcher : watcher, callback<void (check_watcher &)> { |
168 | void start () { io_manager::reg (*this); } |
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169 | void stop () { io_manager::unreg (*this); } |
236 | void start () { io_manager::reg (*this); } |
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237 | void stop () { io_manager::unreg (*this); } |
170 | |
238 | |
171 | template<class O1, class O2> |
239 | template<class O, class M> |
172 | check_watcher (O1 *object, void (O2::*method) (check_watcher &)) |
240 | check_watcher (O object, M method) |
173 | : callback1<void, check_watcher &> (object,method) |
241 | : callback<void (check_watcher &)> (object, method) |
174 | { } |
242 | { } |
175 | ~check_watcher () { stop (); } |
243 | ~check_watcher () { stop (); } |
176 | }; |
244 | }; |
177 | #endif |
245 | #endif |
178 | |
246 | |
179 | #if IOM_IDLE |
247 | #if IOM_IDLE |
180 | // run after checking for any i/o, but before waiting |
248 | // run after checking for any i/o, but before waiting |
181 | struct idle_watcher : watcher, callback1<void, idle_watcher &> { |
249 | struct idle_watcher : watcher, callback<void (idle_watcher &)> { |
182 | void start () { io_manager::reg (*this); } |
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183 | void stop () { io_manager::unreg (*this); } |
250 | void start () { io_manager::reg (*this); } |
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251 | void stop () { io_manager::unreg (*this); } |
184 | |
252 | |
185 | template<class O1, class O2> |
253 | template<class O, class M> |
186 | idle_watcher (O1 *object, void (O2::*method) (idle_watcher &)) |
254 | idle_watcher (O object, M method) |
187 | : callback1<void, idle_watcher &> (object,method) |
255 | : callback<void (idle_watcher &)> (object, method) |
188 | { } |
256 | { } |
189 | ~idle_watcher () { stop (); } |
257 | ~idle_watcher () { stop (); } |
190 | }; |
258 | }; |
191 | #endif |
259 | #endif |
192 | |
260 | |
193 | #if IOM_SIG |
261 | #if IOM_SIG |
194 | struct sig_watcher : watcher, callback1<void, sig_watcher &> { |
262 | struct sig_watcher : watcher, callback<void (sig_watcher &)> { |
195 | int signum; |
263 | int signum; |
196 | |
264 | |
197 | void start (int signum); |
265 | void start (int signum); |
198 | void stop () { io_manager::unreg (*this); } |
266 | void stop () { io_manager::unreg (*this); } |
199 | |
267 | |
200 | template<class O1, class O2> |
268 | template<class O, class M> |
201 | sig_watcher (O1 *object, void (O2::*method) (sig_watcher &)) |
269 | sig_watcher (O object, M method) |
202 | : callback1<void, sig_watcher &> (object,method), signum (-1) |
270 | : callback<void(sig_watcher &)> (object, method), signum (0) |
203 | { } |
271 | { } |
204 | ~sig_watcher () { stop (); } |
272 | ~sig_watcher () { stop (); } |
205 | }; |
273 | }; |
206 | #endif |
274 | #endif |
207 | |
275 | |
208 | #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; |
209 | |
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 | |