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Comparing gvpe/src/iom.h (file contents):
Revision 1.16 by pcg, Sat Jan 17 14:08:57 2004 UTC vs.
Revision 1.26 by pcg, Wed Dec 15 02:59:55 2004 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 <pcg@goof.com>
4 4
5 This program is free software; you can redistribute it and/or modify 5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by 6 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 7 the Free Software Foundation; either version 2 of the License, or
… …
38# define IOM_CHECK 0 38# define IOM_CHECK 0
39#endif 39#endif
40#ifndef IOM_IDLE 40#ifndef IOM_IDLE
41# define IOM_IDLE 0 41# define IOM_IDLE 0
42#endif 42#endif
43#ifndef IOM_SIG
44# define IOM_SIG 0
45#endif
43 46
44typedef double tstamp; 47typedef double tstamp;
45extern tstamp NOW; 48extern tstamp NOW;
46 49
47struct watcher; 50struct watcher;
… …
55struct check_watcher; 58struct check_watcher;
56#endif 59#endif
57#if IOM_IDLE 60#if IOM_IDLE
58struct idle_watcher; 61struct idle_watcher;
59#endif 62#endif
63#if IOM_SIG
64struct sig_watcher;
65#endif
60 66
61template<class watcher> 67template<class watcher>
62struct io_manager_vec : protected vector<watcher *> { 68struct io_manager_vec : vector<watcher *> {
63 friend class io_manager;
64protected:
65 void erase_unordered (unsigned int pos) 69 void erase_unordered (unsigned int pos)
66 { 70 {
67 watcher *w = (*this)[size () - 1]; 71 watcher *w = (*this)[this->size () - 1];
68 pop_back (); 72 this->pop_back ();
69 73
70 if (size ()) 74 if (!this->empty ())
71 if ((*this)[pos] = w) 75 if (((*this)[pos] = w)) // '=' is correct!
72 w->active = pos + 1; 76 w->active = pos + 1;
73 } 77 }
74}; 78};
75 79
80// only used as a namespace, and for initialisation purposes
76class io_manager { 81class io_manager {
77#if IOM_IO
78 io_manager_vec<io_watcher> iow;
79#endif
80#if IOM_CHECK
81 io_manager_vec<check_watcher> cw;
82#endif
83#if IOM_TIME
84 io_manager_vec<time_watcher> tw;
85#endif
86#if IOM_IDLE
87 io_manager_vec<idle_watcher> iw;
88#endif
89
90 template<class watcher> 82 template<class watcher>
91 void reg (watcher *w, io_manager_vec<watcher> &queue); 83 static void reg (watcher &w, io_manager_vec<watcher> &queue);
92 84
93 template<class watcher> 85 template<class watcher>
94 void unreg (watcher *w, io_manager_vec<watcher> &queue); 86 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
95 87
96public: 88public:
89#if IOM_TIME
90 // fetch time only
91 static tstamp now ();
92
93 // set NOW
94 static void set_now ();
95#endif
96
97 // register a watcher 97 // register a watcher
98#if IOM_IO 98#if IOM_IO
99 void reg (io_watcher *w); void unreg (io_watcher *w); 99 static void reg (io_watcher &w); static void unreg (io_watcher &w);
100#endif 100#endif
101#if IOM_TIME 101#if IOM_TIME
102 void reg (time_watcher *w); void unreg (time_watcher *w); 102 static void reg (time_watcher &w); static void unreg (time_watcher &w);
103#endif 103#endif
104#if IOM_CHECK 104#if IOM_CHECK
105 void reg (check_watcher *w); void unreg (check_watcher *w); 105 static void reg (check_watcher &w); static void unreg (check_watcher &w);
106#endif 106#endif
107#if IOM_IDLE 107#if IOM_IDLE
108 void reg (idle_watcher *w); void unreg (idle_watcher *w); 108 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
109#endif
110#if IOM_SIG
111 static void reg (sig_watcher &w); static void unreg (sig_watcher &w);
109#endif 112#endif
110 113
111 void loop (); 114 static void loop ();
112
113 io_manager ();
114 ~io_manager ();
115}; 115};
116
117extern io_manager iom; // a singleton, together with it's construction/destruction problems.
118 116
119struct watcher { 117struct watcher {
120 int active; /* 0 == inactive, else index into respective vector */ 118 int active; /* 0 == inactive, else index into respective vector */
121 119
122 watcher() : active(0) { } 120 watcher () : active (0) { }
123}; 121};
124 122
125#if IOM_IO 123#if IOM_IO
126enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 124enum { EVENT_READ = 1, EVENT_WRITE = 2 };
127 125
… …
130 short events; 128 short events;
131 129
132 void set (int fd_, short events_) { fd = fd_; events = events_; } 130 void set (int fd_, short events_) { fd = fd_; events = events_; }
133 131
134 void set (short events_) { set (fd, events_); } 132 void set (short events_) { set (fd, events_); }
135 void start () { iom.reg (this); } 133 void start () { io_manager::reg (*this); }
136 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } 134 void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); }
137 void stop () { iom.unreg (this); } 135 void stop () { io_manager::unreg (*this); }
138 136
139 template<class O1, class O2> 137 template<class O1, class O2>
140 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 138 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
141 : callback2<void, io_watcher &, short>(object,method) 139 : callback2<void, io_watcher &, short> (object,method)
142 { } 140 { }
143 ~io_watcher () { stop (); } 141 ~io_watcher () { stop (); }
144}; 142};
145#endif 143#endif
146 144
… …
149 tstamp at; 147 tstamp at;
150 148
151 void trigger (); 149 void trigger ();
152 150
153 void set (tstamp when) { at = when; } 151 void set (tstamp when) { at = when; }
154 void operator ()() { trigger (); } 152 void operator () () { trigger (); }
155 void start () { iom.reg (this); } 153 void start () { io_manager::reg (*this); }
156 void start (tstamp when) { set (when); iom.reg (this); } 154 void start (tstamp when) { set (when); io_manager::reg (*this); }
157 void stop () { iom.unreg (this); } 155 void stop () { io_manager::unreg (*this); }
158 156
159 template<class O1, class O2> 157 template<class O1, class O2>
160 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 158 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
161 : callback1<void, time_watcher &>(object,method), at(0) 159 : callback1<void, time_watcher &> (object,method), at (0)
162 { } 160 { }
163 ~time_watcher () { stop (); } 161 ~time_watcher () { stop (); }
164}; 162};
165#endif 163#endif
166 164
167#if IOM_CHECK 165#if IOM_CHECK
168// run before checking for new events 166// run before checking for new events
169struct check_watcher : watcher, callback1<void, check_watcher &> { 167struct check_watcher : watcher, callback1<void, check_watcher &> {
170 void start () { iom.reg (this); } 168 void start () { io_manager::reg (*this); }
171 void stop () { iom.unreg (this); } 169 void stop () { io_manager::unreg (*this); }
172 170
173 template<class O1, class O2> 171 template<class O1, class O2>
174 check_watcher (O1 *object, void (O2::*method)(check_watcher &)) 172 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
175 : callback1<void, check_watcher &>(object,method) 173 : callback1<void, check_watcher &> (object,method)
176 { } 174 { }
177 ~check_watcher () { stop (); } 175 ~check_watcher () { stop (); }
178}; 176};
179#endif 177#endif
180 178
181#if IOM_IDLE 179#if IOM_IDLE
182// run after checking for any i/o, but before waiting 180// run after checking for any i/o, but before waiting
183struct idle_watcher : watcher, callback1<void, idle_watcher &> { 181struct idle_watcher : watcher, callback1<void, idle_watcher &> {
184 void start () { iom.reg (this); } 182 void start () { io_manager::reg (*this); }
185 void stop () { iom.unreg (this); } 183 void stop () { io_manager::unreg (*this); }
186 184
187 template<class O1, class O2> 185 template<class O1, class O2>
188 idle_watcher (O1 *object, void (O2::*method)(idle_watcher &)) 186 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
189 : callback1<void, idle_watcher &>(object,method) 187 : callback1<void, idle_watcher &> (object,method)
190 { } 188 { }
191 ~idle_watcher () { stop (); } 189 ~idle_watcher () { stop (); }
192}; 190};
193#endif 191#endif
194 192
195#endif 193#if IOM_SIG
194struct sig_watcher : watcher, callback1<void, sig_watcher &> {
195 int signum;
196 196
197 void start (int signum);
198 void stop () { io_manager::unreg (*this); }
199
200 template<class O1, class O2>
201 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
202 : callback1<void, sig_watcher &> (object,method), signum (-1)
203 { }
204 ~sig_watcher () { stop (); }
205};
206#endif
207
208#endif
209

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