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Comparing gvpe/src/iom.h (file contents):
Revision 1.17 by pcg, Thu Jan 29 23:17:39 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__
… …
38# define IOM_CHECK 0 40# define IOM_CHECK 0
39#endif 41#endif
40#ifndef IOM_IDLE 42#ifndef IOM_IDLE
41# define IOM_IDLE 0 43# define IOM_IDLE 0
42#endif 44#endif
45#ifndef IOM_SIG
46# define IOM_SIG 0
47#endif
43 48
44typedef double tstamp; 49typedef double tstamp;
45extern tstamp NOW; 50extern tstamp NOW;
46 51
47struct watcher; 52struct watcher;
… …
55struct check_watcher; 60struct check_watcher;
56#endif 61#endif
57#if IOM_IDLE 62#if IOM_IDLE
58struct idle_watcher; 63struct idle_watcher;
59#endif 64#endif
65#if IOM_SIG
66struct sig_watcher;
67#endif
60 68
61template<class watcher> 69template<class watcher>
62struct io_manager_vec : protected vector<watcher *> { 70struct io_manager_vec : vector<watcher *> {
63 friend class io_manager;
64protected:
65#if IOM_CHECK
66 bool activity;
67#endif
68
69 void erase_unordered (unsigned int pos) 71 void erase_unordered (unsigned int pos)
70 { 72 {
71 watcher *w = (*this)[size () - 1]; 73 watcher *w = (*this)[this->size () - 1];
72 pop_back (); 74 this->pop_back ();
73 75
74 if (size ()) 76 if (!this->empty ())
75 if ((*this)[pos] = w) 77 if (((*this)[pos] = w)) // '=' is correct!
76 w->active = pos + 1; 78 w->active = pos + 1;
77 } 79 }
78}; 80};
79 81
82// only used as a namespace, and for initialisation purposes
80class io_manager { 83class io_manager {
81#if IOM_IO
82 io_manager_vec<io_watcher> iow;
83#endif
84#if IOM_CHECK
85 io_manager_vec<check_watcher> cw;
86#endif
87#if IOM_TIME
88 io_manager_vec<time_watcher> tw;
89#endif
90#if IOM_IDLE
91 io_manager_vec<idle_watcher> iw;
92#endif
93
94 template<class watcher> 84 template<class watcher>
95 void reg (watcher *w, io_manager_vec<watcher> &queue); 85 static void reg (watcher &w, io_manager_vec<watcher> &queue);
96 86
97 template<class watcher> 87 template<class watcher>
98 void unreg (watcher *w, io_manager_vec<watcher> &queue); 88 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
99 89
100public: 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
101 // register a watcher 99 // register a watcher
102#if IOM_IO 100#if IOM_IO
103 void reg (io_watcher *w); void unreg (io_watcher *w); 101 static void reg (io_watcher &w); static void unreg (io_watcher &w);
104#endif 102#endif
105#if IOM_TIME 103#if IOM_TIME
106 void reg (time_watcher *w); void unreg (time_watcher *w); 104 static void reg (time_watcher &w); static void unreg (time_watcher &w);
107#endif 105#endif
108#if IOM_CHECK 106#if IOM_CHECK
109 void reg (check_watcher *w); void unreg (check_watcher *w); 107 static void reg (check_watcher &w); static void unreg (check_watcher &w);
110#endif 108#endif
111#if IOM_IDLE 109#if IOM_IDLE
112 void reg (idle_watcher *w); void unreg (idle_watcher *w); 110 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
111#endif
112#if IOM_SIG
113 static void reg (sig_watcher &w); static void unreg (sig_watcher &w);
113#endif 114#endif
114 115
115 void loop (); 116 static void loop ();
116
117 io_manager ();
118 ~io_manager ();
119}; 117};
120
121extern io_manager iom; // a singleton, together with it's construction/destruction problems.
122 118
123struct watcher { 119struct watcher {
124 int active; /* 0 == inactive, else index into respective vector */ 120 int active; /* 0 == inactive, else index into respective vector */
125 121
126 watcher() : active(0) { } 122 watcher () : active (0) { }
127}; 123};
128 124
129#if IOM_IO 125#if IOM_IO
130enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 126enum { EVENT_READ = 1, EVENT_WRITE = 2 };
131 127
… …
134 short events; 130 short events;
135 131
136 void set (int fd_, short events_) { fd = fd_; events = events_; } 132 void set (int fd_, short events_) { fd = fd_; events = events_; }
137 133
138 void set (short events_) { set (fd, events_); } 134 void set (short events_) { set (fd, events_); }
139 void start () { iom.reg (this); } 135 void start () { io_manager::reg (*this); }
140 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); }
141 void stop () { iom.unreg (this); } 137 void stop () { io_manager::unreg (*this); }
142 138
143 template<class O1, class O2> 139 template<class O1, class O2>
144 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 140 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
145 : callback2<void, io_watcher &, short>(object,method) 141 : callback2<void, io_watcher &, short> (object,method)
146 { } 142 { }
147 ~io_watcher () { stop (); } 143 ~io_watcher () { stop (); }
148}; 144};
149#endif 145#endif
150 146
… …
153 tstamp at; 149 tstamp at;
154 150
155 void trigger (); 151 void trigger ();
156 152
157 void set (tstamp when) { at = when; } 153 void set (tstamp when) { at = when; }
158 void operator ()() { trigger (); } 154 void operator () () { trigger (); }
159 void start () { iom.reg (this); } 155 void start () { io_manager::reg (*this); }
160 void start (tstamp when) { set (when); iom.reg (this); } 156 void start (tstamp when) { set (when); io_manager::reg (*this); }
161 void stop () { iom.unreg (this); } 157 void stop () { io_manager::unreg (*this); }
162 158
163 template<class O1, class O2> 159 template<class O1, class O2>
164 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 160 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
165 : callback1<void, time_watcher &>(object,method), at(0) 161 : callback1<void, time_watcher &> (object,method), at (0)
166 { } 162 { }
167 ~time_watcher () { stop (); } 163 ~time_watcher () { stop (); }
168}; 164};
169#endif 165#endif
170 166
171#if IOM_CHECK 167#if IOM_CHECK
172// run before checking for new events 168// run before checking for new events
173struct check_watcher : watcher, callback1<void, check_watcher &> { 169struct check_watcher : watcher, callback1<void, check_watcher &> {
174 void start () { iom.reg (this); } 170 void start () { io_manager::reg (*this); }
175 void stop () { iom.unreg (this); } 171 void stop () { io_manager::unreg (*this); }
176 172
177 template<class O1, class O2> 173 template<class O1, class O2>
178 check_watcher (O1 *object, void (O2::*method)(check_watcher &)) 174 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
179 : callback1<void, check_watcher &>(object,method) 175 : callback1<void, check_watcher &> (object,method)
180 { } 176 { }
181 ~check_watcher () { stop (); } 177 ~check_watcher () { stop (); }
182}; 178};
183#endif 179#endif
184 180
185#if IOM_IDLE 181#if IOM_IDLE
186// run after checking for any i/o, but before waiting 182// run after checking for any i/o, but before waiting
187struct idle_watcher : watcher, callback1<void, idle_watcher &> { 183struct idle_watcher : watcher, callback1<void, idle_watcher &> {
188 void start () { iom.reg (this); } 184 void start () { io_manager::reg (*this); }
189 void stop () { iom.unreg (this); } 185 void stop () { io_manager::unreg (*this); }
190 186
191 template<class O1, class O2> 187 template<class O1, class O2>
192 idle_watcher (O1 *object, void (O2::*method)(idle_watcher &)) 188 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
193 : callback1<void, idle_watcher &>(object,method) 189 : callback1<void, idle_watcher &> (object,method)
194 { } 190 { }
195 ~idle_watcher () { stop (); } 191 ~idle_watcher () { stop (); }
196}; 192};
197#endif 193#endif
198 194
199#endif 195#if IOM_SIG
196struct sig_watcher : watcher, callback1<void, sig_watcher &> {
197 int signum;
200 198
199 void start (int signum);
200 void stop () { io_manager::unreg (*this); }
201
202 template<class O1, class O2>
203 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
204 : callback1<void, sig_watcher &> (object,method), signum (-1)
205 { }
206 ~sig_watcher () { stop (); }
207};
208#endif
209
210#endif
211

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