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 | |
|
|
5 | This file is part of GVPE. |
|
|
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 | |
… | |
… | |
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 | |
|
|
31 | #if IOM_CHILD |
|
|
32 | # undef IOM_SIG |
|
|
33 | # define IOM_SIG 1 |
|
|
34 | #endif |
|
|
35 | |
29 | #include "callback.h" |
36 | #include "callback.h" |
30 | |
|
|
31 | #ifndef IOM_IO |
|
|
32 | # define IOM_IO 0 |
|
|
33 | #endif |
|
|
34 | #ifndef IOM_TIME |
|
|
35 | # define IOM_TIME 0 |
|
|
36 | #endif |
|
|
37 | #ifndef IOM_CHECK |
|
|
38 | # define IOM_CHECK 0 |
|
|
39 | #endif |
|
|
40 | #ifndef IOM_IDLE |
|
|
41 | # define IOM_IDLE 0 |
|
|
42 | #endif |
|
|
43 | #ifndef IOM_SIG |
|
|
44 | # define IOM_SIG 0 |
|
|
45 | #endif |
|
|
46 | |
37 | |
47 | typedef double tstamp; |
38 | typedef double tstamp; |
48 | extern tstamp NOW; |
39 | extern tstamp NOW; |
|
|
40 | |
|
|
41 | // TSTAMP_MAX must still fit into a positive struct timeval |
|
|
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; |
|
|
59 | #endif |
|
|
60 | #if IOM_CHILD |
|
|
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) |
… | |
… | |
108 | 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); |
109 | #endif |
106 | #endif |
110 | #if IOM_SIG |
107 | #if IOM_SIG |
111 | 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); |
112 | #endif |
109 | #endif |
|
|
110 | #if IOM_CHILD |
|
|
111 | static void reg (child_watcher &w); static void unreg (child_watcher &w); |
|
|
112 | #endif |
113 | |
113 | |
114 | static void loop (); |
114 | static void loop (); |
115 | }; |
115 | }; |
116 | |
116 | |
117 | struct watcher { |
117 | struct watcher { |
118 | int active; /* 0 == inactive, else index into respective vector */ |
118 | int active; /* 0 == inactive, else index into respective vector */ |
119 | |
119 | |
|
|
120 | bool is_active () { return active; } |
|
|
121 | |
120 | watcher () : active (0) { } |
122 | watcher () : active (0) { } |
121 | }; |
123 | }; |
122 | |
124 | |
123 | #if IOM_IO |
125 | #if IOM_IO |
124 | enum { EVENT_READ = 1, EVENT_WRITE = 2 }; |
126 | enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = 1, EVENT_WRITE = 2 }; |
125 | |
127 | |
126 | struct io_watcher : watcher, callback2<void, io_watcher &, short> { |
128 | struct io_watcher : watcher, callback<void (io_watcher &, short)> { |
127 | int fd; |
129 | int fd; |
128 | short events; |
130 | short events; |
129 | |
131 | |
130 | void set (int fd_, short events_) { fd = fd_; events = events_; } |
132 | void set (int fd_, short events_) { fd = fd_; events = events_; } |
131 | |
133 | |
132 | void set (short events_) { set (fd, events_); } |
134 | void set (short events_) { set (fd, events_); } |
133 | void start () { io_manager::reg (*this); } |
135 | void start () { io_manager::reg (*this); } |
134 | void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); } |
136 | void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); } |
135 | void stop () { io_manager::unreg (*this); } |
137 | void stop () { io_manager::unreg (*this); } |
136 | |
138 | |
137 | template<class O1, class O2> |
139 | template<class O, class M> |
138 | io_watcher (O1 *object, void (O2::*method) (io_watcher &, short)) |
140 | io_watcher (O object, M method) |
139 | : callback2<void, io_watcher &, short> (object,method) |
141 | : callback<void (io_watcher &, short)> (object, method) |
140 | { } |
142 | { } |
141 | ~io_watcher () { stop (); } |
143 | ~io_watcher () { stop (); } |
142 | }; |
144 | }; |
143 | #endif |
145 | #endif |
144 | |
146 | |
145 | #if IOM_TIME |
147 | #if IOM_TIME |
146 | struct time_watcher : watcher, callback1<void, time_watcher &> { |
148 | struct time_watcher : watcher, callback<void (time_watcher &)> { |
147 | tstamp at; |
149 | tstamp at; |
148 | |
150 | |
149 | void trigger (); |
151 | void trigger (); |
150 | |
152 | |
151 | void set (tstamp when) { at = when; } |
153 | void set (tstamp when) { at = when; } |
152 | void operator () () { trigger (); } |
154 | void operator () () { trigger (); } |
153 | void start () { io_manager::reg (*this); } |
155 | void start () { io_manager::reg (*this); } |
154 | void start (tstamp when) { set (when); io_manager::reg (*this); } |
156 | void start (tstamp when) { set (when); io_manager::reg (*this); } |
155 | void stop () { io_manager::unreg (*this); } |
157 | void stop () { io_manager::unreg (*this); } |
156 | |
158 | |
157 | template<class O1, class O2> |
159 | template<class O, class M> |
158 | time_watcher (O1 *object, void (O2::*method) (time_watcher &)) |
160 | time_watcher (O object, M method) |
159 | : callback1<void, time_watcher &> (object,method), at (0) |
161 | : callback<void (time_watcher &)> (object, method), at (0) |
160 | { } |
162 | { } |
161 | ~time_watcher () { stop (); } |
163 | ~time_watcher () { stop (); } |
162 | }; |
164 | }; |
163 | #endif |
165 | #endif |
164 | |
166 | |
165 | #if IOM_CHECK |
167 | #if IOM_CHECK |
166 | // run before checking for new events |
168 | // run before checking for new events |
167 | struct check_watcher : watcher, callback1<void, check_watcher &> { |
169 | struct check_watcher : watcher, callback<void (check_watcher &)> { |
168 | void start () { io_manager::reg (*this); } |
|
|
169 | void stop () { io_manager::unreg (*this); } |
170 | void start () { io_manager::reg (*this); } |
|
|
171 | void stop () { io_manager::unreg (*this); } |
170 | |
172 | |
171 | template<class O1, class O2> |
173 | template<class O, class M> |
172 | check_watcher (O1 *object, void (O2::*method) (check_watcher &)) |
174 | check_watcher (O object, M method) |
173 | : callback1<void, check_watcher &> (object,method) |
175 | : callback<void (check_watcher &)> (object, method) |
174 | { } |
176 | { } |
175 | ~check_watcher () { stop (); } |
177 | ~check_watcher () { stop (); } |
176 | }; |
178 | }; |
177 | #endif |
179 | #endif |
178 | |
180 | |
179 | #if IOM_IDLE |
181 | #if IOM_IDLE |
180 | // run after checking for any i/o, but before waiting |
182 | // run after checking for any i/o, but before waiting |
181 | struct idle_watcher : watcher, callback1<void, idle_watcher &> { |
183 | struct idle_watcher : watcher, callback<void (idle_watcher &)> { |
182 | void start () { io_manager::reg (*this); } |
|
|
183 | void stop () { io_manager::unreg (*this); } |
184 | void start () { io_manager::reg (*this); } |
|
|
185 | void stop () { io_manager::unreg (*this); } |
184 | |
186 | |
185 | template<class O1, class O2> |
187 | template<class O, class M> |
186 | idle_watcher (O1 *object, void (O2::*method) (idle_watcher &)) |
188 | idle_watcher (O object, M method) |
187 | : callback1<void, idle_watcher &> (object,method) |
189 | : callback<void (idle_watcher &)> (object, method) |
188 | { } |
190 | { } |
189 | ~idle_watcher () { stop (); } |
191 | ~idle_watcher () { stop (); } |
190 | }; |
192 | }; |
191 | #endif |
193 | #endif |
192 | |
194 | |
193 | #if IOM_SIG |
195 | #if IOM_SIG |
194 | struct sig_watcher : watcher, callback1<void, sig_watcher &> { |
196 | struct sig_watcher : watcher, callback<void (sig_watcher &)> { |
195 | int signum; |
197 | int signum; |
196 | |
198 | |
197 | void start (int signum); |
199 | void start (int signum); |
198 | void stop () { io_manager::unreg (*this); } |
200 | void stop () { io_manager::unreg (*this); } |
199 | |
201 | |
200 | template<class O1, class O2> |
202 | template<class O, class M> |
201 | sig_watcher (O1 *object, void (O2::*method) (sig_watcher &)) |
203 | sig_watcher (O object, M method) |
202 | : callback1<void, sig_watcher &> (object,method), signum (-1) |
204 | : callback<void(sig_watcher &)> (object, method), signum (0) |
203 | { } |
205 | { } |
204 | ~sig_watcher () { stop (); } |
206 | ~sig_watcher () { stop (); } |
205 | }; |
207 | }; |
206 | #endif |
208 | #endif |
207 | |
209 | |
208 | #endif |
210 | #if IOM_CHILD |
|
|
211 | struct child_watcher : watcher, callback<void (child_watcher &, int)> { |
|
|
212 | int /*pid_t*/ pid; |
209 | |
213 | |
|
|
214 | void start (int pid) { this->pid = pid; io_manager::reg (*this); } |
|
|
215 | void stop () { io_manager::unreg (*this); } |
|
|
216 | |
|
|
217 | template<class O, class M> |
|
|
218 | child_watcher (O object, M method) |
|
|
219 | : callback<void (child_watcher &, int)> (object, method), pid (0) |
|
|
220 | { } |
|
|
221 | ~child_watcher () { stop (); } |
|
|
222 | }; |
|
|
223 | #endif |
|
|
224 | |
|
|
225 | #endif |
|
|
226 | |