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, 2004 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. 59 Temple Place, Suite 330, Boston, MA 02111-1307 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__ |
22 | |
24 | |
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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) |
49 | |
43 | |
50 | struct watcher; |
44 | struct watcher; |
51 | #if IOM_IO |
45 | #if IOM_IO |
52 | struct io_watcher; |
46 | struct io_watcher; |
53 | #endif |
47 | #endif |
… | |
… | |
60 | #if IOM_IDLE |
54 | #if IOM_IDLE |
61 | struct idle_watcher; |
55 | struct idle_watcher; |
62 | #endif |
56 | #endif |
63 | #if IOM_SIG |
57 | #if IOM_SIG |
64 | struct sig_watcher; |
58 | struct sig_watcher; |
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59 | #endif |
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60 | #if IOM_CHILD |
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61 | struct child_watcher; |
65 | #endif |
62 | #endif |
66 | |
63 | |
67 | template<class watcher> |
64 | template<class watcher> |
68 | struct io_manager_vec : vector<watcher *> { |
65 | struct io_manager_vec : vector<watcher *> { |
69 | void erase_unordered (unsigned int pos) |
66 | void erase_unordered (unsigned int pos) |
… | |
… | |
84 | |
81 | |
85 | template<class watcher> |
82 | template<class watcher> |
86 | static void unreg (watcher &w, io_manager_vec<watcher> &queue); |
83 | static void unreg (watcher &w, io_manager_vec<watcher> &queue); |
87 | |
84 | |
88 | public: |
85 | public: |
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86 | #if IOM_TIME |
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87 | // fetch time only |
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88 | static tstamp now (); |
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89 | |
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90 | // set NOW |
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91 | static void set_now (); |
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92 | #endif |
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93 | |
89 | // register a watcher |
94 | // register a watcher |
90 | #if IOM_IO |
95 | #if IOM_IO |
91 | static void reg (io_watcher &w); static void unreg (io_watcher &w); |
96 | static void reg (io_watcher &w); static void unreg (io_watcher &w); |
92 | #endif |
97 | #endif |
93 | #if IOM_TIME |
98 | #if IOM_TIME |
… | |
… | |
100 | static void reg (idle_watcher &w); static void unreg (idle_watcher &w); |
105 | static void reg (idle_watcher &w); static void unreg (idle_watcher &w); |
101 | #endif |
106 | #endif |
102 | #if IOM_SIG |
107 | #if IOM_SIG |
103 | static void reg (sig_watcher &w); static void unreg (sig_watcher &w); |
108 | static void reg (sig_watcher &w); static void unreg (sig_watcher &w); |
104 | #endif |
109 | #endif |
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110 | #if IOM_CHILD |
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111 | static void reg (child_watcher &w); static void unreg (child_watcher &w); |
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112 | #endif |
105 | |
113 | |
106 | static void loop (); |
114 | static void loop (); |
107 | }; |
115 | }; |
108 | |
116 | |
109 | struct watcher { |
117 | struct watcher { |
… | |
… | |
111 | |
119 | |
112 | watcher () : active (0) { } |
120 | watcher () : active (0) { } |
113 | }; |
121 | }; |
114 | |
122 | |
115 | #if IOM_IO |
123 | #if IOM_IO |
116 | enum { EVENT_READ = 1, EVENT_WRITE = 2 }; |
124 | enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = 1, EVENT_WRITE = 2 }; |
117 | |
125 | |
118 | struct io_watcher : watcher, callback2<void, io_watcher &, short> { |
126 | struct io_watcher : watcher, callback2<void, io_watcher &, short> { |
119 | int fd; |
127 | int fd; |
120 | short events; |
128 | short events; |
121 | |
129 | |
… | |
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126 | void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); } |
134 | void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); } |
127 | void stop () { io_manager::unreg (*this); } |
135 | void stop () { io_manager::unreg (*this); } |
128 | |
136 | |
129 | template<class O1, class O2> |
137 | template<class O1, class O2> |
130 | io_watcher (O1 *object, void (O2::*method) (io_watcher &, short)) |
138 | io_watcher (O1 *object, void (O2::*method) (io_watcher &, short)) |
131 | : callback2<void, io_watcher &, short> (object,method) |
139 | : callback2<void, io_watcher &, short> (object, method) |
132 | { } |
140 | { } |
133 | ~io_watcher () { stop (); } |
141 | ~io_watcher () { stop (); } |
134 | }; |
142 | }; |
135 | #endif |
143 | #endif |
136 | |
144 | |
… | |
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146 | void start (tstamp when) { set (when); io_manager::reg (*this); } |
154 | void start (tstamp when) { set (when); io_manager::reg (*this); } |
147 | void stop () { io_manager::unreg (*this); } |
155 | void stop () { io_manager::unreg (*this); } |
148 | |
156 | |
149 | template<class O1, class O2> |
157 | template<class O1, class O2> |
150 | time_watcher (O1 *object, void (O2::*method) (time_watcher &)) |
158 | time_watcher (O1 *object, void (O2::*method) (time_watcher &)) |
151 | : callback1<void, time_watcher &> (object,method), at (0) |
159 | : callback1<void, time_watcher &> (object, method), at (0) |
152 | { } |
160 | { } |
153 | ~time_watcher () { stop (); } |
161 | ~time_watcher () { stop (); } |
154 | }; |
162 | }; |
155 | #endif |
163 | #endif |
156 | |
164 | |
… | |
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160 | void start () { io_manager::reg (*this); } |
168 | void start () { io_manager::reg (*this); } |
161 | void stop () { io_manager::unreg (*this); } |
169 | void stop () { io_manager::unreg (*this); } |
162 | |
170 | |
163 | template<class O1, class O2> |
171 | template<class O1, class O2> |
164 | check_watcher (O1 *object, void (O2::*method) (check_watcher &)) |
172 | check_watcher (O1 *object, void (O2::*method) (check_watcher &)) |
165 | : callback1<void, check_watcher &> (object,method) |
173 | : callback1<void, check_watcher &> (object, method) |
166 | { } |
174 | { } |
167 | ~check_watcher () { stop (); } |
175 | ~check_watcher () { stop (); } |
168 | }; |
176 | }; |
169 | #endif |
177 | #endif |
170 | |
178 | |
… | |
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174 | void start () { io_manager::reg (*this); } |
182 | void start () { io_manager::reg (*this); } |
175 | void stop () { io_manager::unreg (*this); } |
183 | void stop () { io_manager::unreg (*this); } |
176 | |
184 | |
177 | template<class O1, class O2> |
185 | template<class O1, class O2> |
178 | idle_watcher (O1 *object, void (O2::*method) (idle_watcher &)) |
186 | idle_watcher (O1 *object, void (O2::*method) (idle_watcher &)) |
179 | : callback1<void, idle_watcher &> (object,method) |
187 | : callback1<void, idle_watcher &> (object, method) |
180 | { } |
188 | { } |
181 | ~idle_watcher () { stop (); } |
189 | ~idle_watcher () { stop (); } |
182 | }; |
190 | }; |
183 | #endif |
191 | #endif |
184 | |
192 | |
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189 | void start (int signum); |
197 | void start (int signum); |
190 | void stop () { io_manager::unreg (*this); } |
198 | void stop () { io_manager::unreg (*this); } |
191 | |
199 | |
192 | template<class O1, class O2> |
200 | template<class O1, class O2> |
193 | sig_watcher (O1 *object, void (O2::*method) (sig_watcher &)) |
201 | sig_watcher (O1 *object, void (O2::*method) (sig_watcher &)) |
194 | : callback1<void, sig_watcher &> (object,method), signum (-1) |
202 | : callback1<void, sig_watcher &> (object, method), signum (0) |
195 | { } |
203 | { } |
196 | ~sig_watcher () { stop (); } |
204 | ~sig_watcher () { stop (); } |
197 | }; |
205 | }; |
198 | #endif |
206 | #endif |
199 | |
207 | |
200 | #endif |
208 | #if IOM_CHILD |
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209 | struct child_watcher : watcher, callback2<void, child_watcher &, int> { |
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210 | int /*pid_t*/ pid; |
201 | |
211 | |
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212 | void start (int pid) { this->pid = pid; io_manager::reg (*this); } |
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213 | void stop () { io_manager::unreg (*this); } |
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214 | |
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215 | template<class O1, class O2> |
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216 | child_watcher (O1 *object, void (O2::*method) (child_watcher &, int status)) |
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217 | : callback2<void, child_watcher &, int> (object, method), pid (0) |
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218 | { } |
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219 | ~child_watcher () { stop (); } |
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220 | }; |
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221 | #endif |
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222 | |
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223 | #endif |
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224 | |