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. 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) |
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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 | # undef IOM_TIME |
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51 | # define IOM_TIME 1 |
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52 | # undef IOM_IDLE // NYI |
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53 | # undef IOM_SIG // NYI |
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54 | # undef IOM_CHILD // NYI |
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55 | #endif |
49 | |
56 | |
50 | struct watcher; |
57 | struct watcher; |
51 | #if IOM_IO |
58 | #if IOM_IO |
52 | struct io_watcher; |
59 | struct io_watcher; |
53 | #endif |
60 | #endif |
… | |
… | |
60 | #if IOM_IDLE |
67 | #if IOM_IDLE |
61 | struct idle_watcher; |
68 | struct idle_watcher; |
62 | #endif |
69 | #endif |
63 | #if IOM_SIG |
70 | #if IOM_SIG |
64 | struct sig_watcher; |
71 | struct sig_watcher; |
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72 | #endif |
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73 | #if IOM_CHILD |
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74 | struct child_watcher; |
65 | #endif |
75 | #endif |
66 | |
76 | |
67 | template<class watcher> |
77 | template<class watcher> |
68 | struct io_manager_vec : vector<watcher *> { |
78 | struct io_manager_vec : vector<watcher *> { |
69 | void erase_unordered (unsigned int pos) |
79 | void erase_unordered (unsigned int pos) |
… | |
… | |
84 | |
94 | |
85 | template<class watcher> |
95 | template<class watcher> |
86 | static void unreg (watcher &w, io_manager_vec<watcher> &queue); |
96 | static void unreg (watcher &w, io_manager_vec<watcher> &queue); |
87 | |
97 | |
88 | public: |
98 | public: |
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99 | #if IOM_TIME |
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100 | // fetch time only |
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101 | static tstamp now (); |
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102 | |
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103 | // set NOW |
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104 | static void set_now (); |
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105 | #endif |
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106 | |
89 | // register a watcher |
107 | // register a watcher |
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108 | #ifndef IOM_LIBEVENT |
90 | #if IOM_IO |
109 | #if IOM_IO |
91 | static void reg (io_watcher &w); static void unreg (io_watcher &w); |
110 | static void reg (io_watcher &w); static void unreg (io_watcher &w); |
92 | #endif |
111 | #endif |
93 | #if IOM_TIME |
112 | #if IOM_TIME |
94 | static void reg (time_watcher &w); static void unreg (time_watcher &w); |
113 | static void reg (time_watcher &w); static void unreg (time_watcher &w); |
95 | #endif |
114 | #endif |
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115 | #if IOM_SIG |
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116 | static void reg (sig_watcher &w); static void unreg (sig_watcher &w); |
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117 | #endif |
96 | #if IOM_CHECK |
118 | #if IOM_CHECK |
97 | static void reg (check_watcher &w); static void unreg (check_watcher &w); |
119 | static void reg (check_watcher &w); static void unreg (check_watcher &w); |
98 | #endif |
120 | #endif |
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121 | #endif |
99 | #if IOM_IDLE |
122 | #if IOM_IDLE |
100 | static void reg (idle_watcher &w); static void unreg (idle_watcher &w); |
123 | static void reg (idle_watcher &w); static void unreg (idle_watcher &w); |
101 | #endif |
124 | #endif |
102 | #if IOM_SIG |
125 | #if IOM_CHILD |
103 | static void reg (sig_watcher &w); static void unreg (sig_watcher &w); |
126 | static void reg (child_watcher &w); static void unreg (child_watcher &w); |
104 | #endif |
127 | #endif |
105 | |
128 | |
106 | static void loop (); |
129 | static void loop (); |
107 | }; |
130 | }; |
108 | |
131 | |
109 | struct watcher { |
132 | struct watcher { |
110 | int active; /* 0 == inactive, else index into respective vector */ |
133 | int active; /* 0 == inactive, else index into respective vector */ |
111 | |
134 | |
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135 | bool is_active () { return active; } |
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136 | |
112 | watcher () : active (0) { } |
137 | watcher () : active (0) { } |
113 | }; |
138 | }; |
114 | |
139 | |
115 | #if IOM_IO |
140 | #if IOM_IO |
116 | enum { EVENT_READ = 1, EVENT_WRITE = 2 }; |
141 | #ifdef IOM_LIBEVENT |
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142 | enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = EV_READ, EVENT_WRITE = EV_WRITE }; |
117 | |
143 | |
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144 | void iom_io_c_callback (int fd, short events, void *data); |
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145 | |
118 | struct io_watcher : watcher, callback2<void, io_watcher &, short> { |
146 | struct io_watcher : watcher, callback<void (io_watcher &, short)> { |
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147 | struct event ev; |
119 | int fd; |
148 | int fd; |
120 | short events; |
149 | short events; |
121 | |
150 | |
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151 | void set (int fd_, short events_); |
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152 | void set (short events_) { set (fd, events_); } |
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153 | void start () { if (!active) event_add (&ev, 0); active = 1; } |
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154 | void start (int fd_, short events_) { set (fd_, events_); start (); } |
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155 | void stop () { if (active) event_del (&ev); active = 0; } |
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156 | |
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157 | template<class O, class M> |
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158 | io_watcher (O object, M method) |
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159 | : callback<void (io_watcher &, short)> (object, method) |
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160 | { } |
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161 | ~io_watcher () { stop (); } |
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162 | }; |
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163 | #else |
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164 | enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = 1, EVENT_WRITE = 2 }; |
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165 | |
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166 | struct io_watcher : watcher, callback<void (io_watcher &, short)> { |
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167 | int fd; |
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168 | short events; |
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169 | |
122 | void set (int fd_, short events_) { fd = fd_; events = events_; } |
170 | void set (int fd_, short events_) { fd = fd_; events = events_; } |
123 | |
171 | |
124 | void set (short events_) { set (fd, events_); } |
172 | void set (short events_) { set (fd, events_); } |
125 | void start () { io_manager::reg (*this); } |
173 | void start () { io_manager::reg (*this); } |
126 | void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); } |
174 | void start (int fd_, short events_) { set (fd_, events_); start (); } |
127 | void stop () { io_manager::unreg (*this); } |
175 | void stop () { io_manager::unreg (*this); } |
128 | |
176 | |
129 | template<class O1, class O2> |
177 | template<class O, class M> |
130 | io_watcher (O1 *object, void (O2::*method) (io_watcher &, short)) |
178 | io_watcher (O object, M method) |
131 | : callback2<void, io_watcher &, short> (object,method) |
179 | : callback<void (io_watcher &, short)> (object, method) |
132 | { } |
180 | { } |
133 | ~io_watcher () { stop (); } |
181 | ~io_watcher () { stop (); } |
134 | }; |
182 | }; |
135 | #endif |
183 | #endif |
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184 | #endif |
136 | |
185 | |
137 | #if IOM_TIME |
186 | #if IOM_TIME |
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187 | #ifdef IOM_LIBEVENT |
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188 | void iom_time_c_callback (int fd, short events, void *data); |
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189 | |
138 | struct time_watcher : watcher, callback1<void, time_watcher &> { |
190 | struct time_watcher : watcher, callback<void (time_watcher &)> { |
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191 | struct event ev; |
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192 | tstamp at; |
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193 | |
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194 | void trigger (); |
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195 | |
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196 | void set (tstamp when) |
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197 | { |
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198 | at = when; |
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199 | if (active) |
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200 | start (); |
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201 | } |
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202 | void operator () () { trigger (); } |
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203 | void start (); |
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204 | void start (tstamp when) { at = when; start (); } |
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205 | void stop () { if (active) evtimer_del (&ev); active = 0; } |
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206 | |
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207 | template<class O, class M> |
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208 | time_watcher (O object, M method) |
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209 | : callback<void (time_watcher &)> (object, method), at (0) |
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210 | { } |
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211 | ~time_watcher () { stop (); } |
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212 | }; |
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213 | #else |
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214 | struct time_watcher : watcher, callback<void (time_watcher &)> { |
139 | tstamp at; |
215 | tstamp at; |
140 | |
216 | |
141 | void trigger (); |
217 | void trigger (); |
142 | |
218 | |
143 | void set (tstamp when) { at = when; } |
219 | void set (tstamp when) { at = when; } |
144 | void operator () () { trigger (); } |
220 | void operator () () { trigger (); } |
145 | void start () { io_manager::reg (*this); } |
221 | void start () { io_manager::reg (*this); } |
146 | void start (tstamp when) { set (when); io_manager::reg (*this); } |
222 | void start (tstamp when) { set (when); start (); } |
147 | void stop () { io_manager::unreg (*this); } |
223 | void stop () { io_manager::unreg (*this); } |
148 | |
224 | |
149 | template<class O1, class O2> |
225 | template<class O, class M> |
150 | time_watcher (O1 *object, void (O2::*method) (time_watcher &)) |
226 | time_watcher (O object, M method) |
151 | : callback1<void, time_watcher &> (object,method), at (0) |
227 | : callback<void (time_watcher &)> (object, method), at (0) |
152 | { } |
228 | { } |
153 | ~time_watcher () { stop (); } |
229 | ~time_watcher () { stop (); } |
154 | }; |
230 | }; |
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231 | #endif |
155 | #endif |
232 | #endif |
156 | |
233 | |
157 | #if IOM_CHECK |
234 | #if IOM_CHECK |
158 | // run before checking for new events |
235 | // run before checking for new events |
159 | struct check_watcher : watcher, callback1<void, check_watcher &> { |
236 | struct check_watcher : watcher, callback<void (check_watcher &)> { |
160 | void start () { io_manager::reg (*this); } |
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161 | void stop () { io_manager::unreg (*this); } |
237 | void start () { io_manager::reg (*this); } |
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238 | void stop () { io_manager::unreg (*this); } |
162 | |
239 | |
163 | template<class O1, class O2> |
240 | template<class O, class M> |
164 | check_watcher (O1 *object, void (O2::*method) (check_watcher &)) |
241 | check_watcher (O object, M method) |
165 | : callback1<void, check_watcher &> (object,method) |
242 | : callback<void (check_watcher &)> (object, method) |
166 | { } |
243 | { } |
167 | ~check_watcher () { stop (); } |
244 | ~check_watcher () { stop (); } |
168 | }; |
245 | }; |
169 | #endif |
246 | #endif |
170 | |
247 | |
171 | #if IOM_IDLE |
248 | #if IOM_IDLE |
172 | // run after checking for any i/o, but before waiting |
249 | // run after checking for any i/o, but before waiting |
173 | struct idle_watcher : watcher, callback1<void, idle_watcher &> { |
250 | struct idle_watcher : watcher, callback<void (idle_watcher &)> { |
174 | void start () { io_manager::reg (*this); } |
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175 | void stop () { io_manager::unreg (*this); } |
251 | void start () { io_manager::reg (*this); } |
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252 | void stop () { io_manager::unreg (*this); } |
176 | |
253 | |
177 | template<class O1, class O2> |
254 | template<class O, class M> |
178 | idle_watcher (O1 *object, void (O2::*method) (idle_watcher &)) |
255 | idle_watcher (O object, M method) |
179 | : callback1<void, idle_watcher &> (object,method) |
256 | : callback<void (idle_watcher &)> (object, method) |
180 | { } |
257 | { } |
181 | ~idle_watcher () { stop (); } |
258 | ~idle_watcher () { stop (); } |
182 | }; |
259 | }; |
183 | #endif |
260 | #endif |
184 | |
261 | |
185 | #if IOM_SIG |
262 | #if IOM_SIG |
186 | struct sig_watcher : watcher, callback1<void, sig_watcher &> { |
263 | struct sig_watcher : watcher, callback<void (sig_watcher &)> { |
187 | int signum; |
264 | int signum; |
188 | |
265 | |
189 | void start (int signum); |
266 | void start (int signum); |
190 | void stop () { io_manager::unreg (*this); } |
267 | void stop () { io_manager::unreg (*this); } |
191 | |
268 | |
192 | template<class O1, class O2> |
269 | template<class O, class M> |
193 | sig_watcher (O1 *object, void (O2::*method) (sig_watcher &)) |
270 | sig_watcher (O object, M method) |
194 | : callback1<void, sig_watcher &> (object,method), signum (-1) |
271 | : callback<void(sig_watcher &)> (object, method), signum (0) |
195 | { } |
272 | { } |
196 | ~sig_watcher () { stop (); } |
273 | ~sig_watcher () { stop (); } |
197 | }; |
274 | }; |
198 | #endif |
275 | #endif |
199 | |
276 | |
200 | #endif |
277 | #if IOM_CHILD |
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278 | struct child_watcher : watcher, callback<void (child_watcher &, int)> { |
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279 | int /*pid_t*/ pid; |
201 | |
280 | |
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281 | void start (int pid) { this->pid = pid; io_manager::reg (*this); } |
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282 | void stop () { io_manager::unreg (*this); } |
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283 | |
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284 | template<class O, class M> |
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285 | child_watcher (O object, M method) |
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286 | : callback<void (child_watcher &, int)> (object, method), pid (0) |
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287 | { } |
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288 | ~child_watcher () { stop (); } |
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289 | }; |
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290 | #endif |
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291 | |
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292 | #endif |
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293 | |