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Comparing gvpe/src/iom.h (file contents):
Revision 1.20 by pcg, Mon May 10 18:57:08 2004 UTC vs.
Revision 1.27 by pcg, Thu Mar 3 16:54:34 2005 UTC

1/* 1/*
2 iom.h -- generic I/O multiplexor 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
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. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18*/ 20*/
19 21
20#ifndef IOM_H__ 22#ifndef IOM_H__
21#define IOM_H__ 23#define IOM_H__
… …
64struct sig_watcher; 66struct sig_watcher;
65#endif 67#endif
66 68
67template<class watcher> 69template<class watcher>
68struct io_manager_vec : vector<watcher *> { 70struct io_manager_vec : vector<watcher *> {
69#if IOM_CHECK
70 bool activity;
71#endif
72
73 void erase_unordered (unsigned int pos) 71 void erase_unordered (unsigned int pos)
74 { 72 {
75 watcher *w = (*this)[this->size () - 1]; 73 watcher *w = (*this)[this->size () - 1];
76 this->pop_back (); 74 this->pop_back ();
77 75
78 if (this->size ()) 76 if (!this->empty ())
79 if ((*this)[pos] = w) 77 if (((*this)[pos] = w)) // '=' is correct!
80 w->active = pos + 1; 78 w->active = pos + 1;
81 } 79 }
82}; 80};
83 81
82// only used as a namespace, and for initialisation purposes
84class io_manager { 83class io_manager {
85#if IOM_IO
86 io_manager_vec<io_watcher> iow;
87#endif
88#if IOM_CHECK
89 io_manager_vec<check_watcher> cw;
90#endif
91#if IOM_TIME
92 io_manager_vec<time_watcher> tw;
93#endif
94#if IOM_IDLE
95 io_manager_vec<idle_watcher> iw;
96#endif
97#if IOM_SIG
98 typedef io_manager_vec<sig_watcher> sig_vec;
99 vector<sig_vec *> sw;
100 static void sighandler (int signum);
101#endif
102
103 template<class watcher> 84 template<class watcher>
104 void reg (watcher *w, io_manager_vec<watcher> &queue); 85 static void reg (watcher &w, io_manager_vec<watcher> &queue);
105 86
106 template<class watcher> 87 template<class watcher>
107 void unreg (watcher *w, io_manager_vec<watcher> &queue); 88 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
108 89
109public: 90public:
91#if IOM_TIME
92 // fetch time only
93 static tstamp now ();
94
95 // set NOW
96 static void set_now ();
97#endif
98
110 // register a watcher 99 // register a watcher
111#if IOM_IO 100#if IOM_IO
112 void reg (io_watcher *w); void unreg (io_watcher *w); 101 static void reg (io_watcher &w); static void unreg (io_watcher &w);
113#endif 102#endif
114#if IOM_TIME 103#if IOM_TIME
115 void reg (time_watcher *w); void unreg (time_watcher *w); 104 static void reg (time_watcher &w); static void unreg (time_watcher &w);
116#endif 105#endif
117#if IOM_CHECK 106#if IOM_CHECK
118 void reg (check_watcher *w); void unreg (check_watcher *w); 107 static void reg (check_watcher &w); static void unreg (check_watcher &w);
119#endif 108#endif
120#if IOM_IDLE 109#if IOM_IDLE
121 void reg (idle_watcher *w); void unreg (idle_watcher *w); 110 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
122#endif 111#endif
123#if IOM_SIG 112#if IOM_SIG
124 void reg (sig_watcher *w); void unreg (sig_watcher *w); 113 static void reg (sig_watcher &w); static void unreg (sig_watcher &w);
125#endif 114#endif
126 115
127 void loop (); 116 static void loop ();
128
129 io_manager ();
130 ~io_manager ();
131}; 117};
132
133extern io_manager iom; // a singleton, together with it's construction/destruction problems.
134 118
135struct watcher { 119struct watcher {
136 int active; /* 0 == inactive, else index into respective vector */ 120 int active; /* 0 == inactive, else index into respective vector */
137 121
138 watcher () : active (0) { } 122 watcher () : active (0) { }
… …
146 short events; 130 short events;
147 131
148 void set (int fd_, short events_) { fd = fd_; events = events_; } 132 void set (int fd_, short events_) { fd = fd_; events = events_; }
149 133
150 void set (short events_) { set (fd, events_); } 134 void set (short events_) { set (fd, events_); }
151 void start () { iom.reg (this); } 135 void start () { io_manager::reg (*this); }
152 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } 136 void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); }
153 void stop () { iom.unreg (this); } 137 void stop () { io_manager::unreg (*this); }
154 138
155 template<class O1, class O2> 139 template<class O1, class O2>
156 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short)) 140 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
157 : callback2<void, io_watcher &, short> (object,method) 141 : callback2<void, io_watcher &, short> (object,method)
158 { } 142 { }
… …
166 150
167 void trigger (); 151 void trigger ();
168 152
169 void set (tstamp when) { at = when; } 153 void set (tstamp when) { at = when; }
170 void operator () () { trigger (); } 154 void operator () () { trigger (); }
171 void start () { iom.reg (this); } 155 void start () { io_manager::reg (*this); }
172 void start (tstamp when) { set (when); iom.reg (this); } 156 void start (tstamp when) { set (when); io_manager::reg (*this); }
173 void stop () { iom.unreg (this); } 157 void stop () { io_manager::unreg (*this); }
174 158
175 template<class O1, class O2> 159 template<class O1, class O2>
176 time_watcher (O1 *object, void (O2::*method) (time_watcher &)) 160 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
177 : callback1<void, time_watcher &> (object,method), at (0) 161 : callback1<void, time_watcher &> (object,method), at (0)
178 { } 162 { }
… …
181#endif 165#endif
182 166
183#if IOM_CHECK 167#if IOM_CHECK
184// run before checking for new events 168// run before checking for new events
185struct check_watcher : watcher, callback1<void, check_watcher &> { 169struct check_watcher : watcher, callback1<void, check_watcher &> {
186 void start () { iom.reg (this); } 170 void start () { io_manager::reg (*this); }
187 void stop () { iom.unreg (this); } 171 void stop () { io_manager::unreg (*this); }
188 172
189 template<class O1, class O2> 173 template<class O1, class O2>
190 check_watcher (O1 *object, void (O2::*method) (check_watcher &)) 174 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
191 : callback1<void, check_watcher &> (object,method) 175 : callback1<void, check_watcher &> (object,method)
192 { } 176 { }
… …
195#endif 179#endif
196 180
197#if IOM_IDLE 181#if IOM_IDLE
198// run after checking for any i/o, but before waiting 182// run after checking for any i/o, but before waiting
199struct idle_watcher : watcher, callback1<void, idle_watcher &> { 183struct idle_watcher : watcher, callback1<void, idle_watcher &> {
200 void start () { iom.reg (this); } 184 void start () { io_manager::reg (*this); }
201 void stop () { iom.unreg (this); } 185 void stop () { io_manager::unreg (*this); }
202 186
203 template<class O1, class O2> 187 template<class O1, class O2>
204 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &)) 188 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
205 : callback1<void, idle_watcher &> (object,method) 189 : callback1<void, idle_watcher &> (object,method)
206 { } 190 { }
… …
211#if IOM_SIG 195#if IOM_SIG
212struct sig_watcher : watcher, callback1<void, sig_watcher &> { 196struct sig_watcher : watcher, callback1<void, sig_watcher &> {
213 int signum; 197 int signum;
214 198
215 void start (int signum); 199 void start (int signum);
216 void stop () { iom.unreg (this); } 200 void stop () { io_manager::unreg (*this); }
217 201
218 template<class O1, class O2> 202 template<class O1, class O2>
219 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &)) 203 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
220 : callback1<void, sig_watcher &> (object,method), signum (-1) 204 : callback1<void, sig_watcher &> (object,method), signum (-1)
221 { } 205 { }

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