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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 1.24 by pcg, Fri Nov 12 10:23:33 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
46#ifndef IOM_ACCURACY
47# define IOM_ACCURACY 0.001 // start timers at most this much earlier (can be 0)
48#endif
43 49
44typedef double tstamp; 50typedef double tstamp;
45extern tstamp NOW; 51extern tstamp NOW;
46 52
47struct watcher; 53struct watcher;
… …
55struct check_watcher; 61struct check_watcher;
56#endif 62#endif
57#if IOM_IDLE 63#if IOM_IDLE
58struct idle_watcher; 64struct idle_watcher;
59#endif 65#endif
66#if IOM_SIG
67struct sig_watcher;
68#endif
60 69
61template<class watcher> 70template<class watcher>
62struct io_manager_vec : protected vector<watcher *> { 71struct 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) 72 void erase_unordered (unsigned int pos)
70 { 73 {
71 watcher *w = (*this)[size () - 1]; 74 watcher *w = (*this)[this->size () - 1];
72 pop_back (); 75 this->pop_back ();
73 76
74 if (size ()) 77 if (!this->empty ())
75 if ((*this)[pos] = w) 78 if (((*this)[pos] = w)) // '=' is correct!
76 w->active = pos + 1; 79 w->active = pos + 1;
77 } 80 }
78}; 81};
79 82
83// only used as a namespace, and for initialisation purposes
80class io_manager { 84class 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> 85 template<class watcher>
95 void reg (watcher *w, io_manager_vec<watcher> &queue); 86 static void reg (watcher &w, io_manager_vec<watcher> &queue);
96 87
97 template<class watcher> 88 template<class watcher>
98 void unreg (watcher *w, io_manager_vec<watcher> &queue); 89 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
99 90
100public: 91public:
101 // register a watcher 92 // register a watcher
102#if IOM_IO 93#if IOM_IO
103 void reg (io_watcher *w); void unreg (io_watcher *w); 94 static void reg (io_watcher &w); static void unreg (io_watcher &w);
104#endif 95#endif
105#if IOM_TIME 96#if IOM_TIME
106 void reg (time_watcher *w); void unreg (time_watcher *w); 97 static void reg (time_watcher &w); static void unreg (time_watcher &w);
107#endif 98#endif
108#if IOM_CHECK 99#if IOM_CHECK
109 void reg (check_watcher *w); void unreg (check_watcher *w); 100 static void reg (check_watcher &w); static void unreg (check_watcher &w);
110#endif 101#endif
111#if IOM_IDLE 102#if IOM_IDLE
112 void reg (idle_watcher *w); void unreg (idle_watcher *w); 103 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
104#endif
105#if IOM_SIG
106 static void reg (sig_watcher &w); static void unreg (sig_watcher &w);
113#endif 107#endif
114 108
115 void loop (); 109 static void loop ();
116
117 io_manager ();
118 ~io_manager ();
119}; 110};
120
121extern io_manager iom; // a singleton, together with it's construction/destruction problems.
122 111
123struct watcher { 112struct watcher {
124 int active; /* 0 == inactive, else index into respective vector */ 113 int active; /* 0 == inactive, else index into respective vector */
125 114
126 watcher() : active(0) { } 115 watcher () : active (0) { }
127}; 116};
128 117
129#if IOM_IO 118#if IOM_IO
130enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 119enum { EVENT_READ = 1, EVENT_WRITE = 2 };
131 120
… …
134 short events; 123 short events;
135 124
136 void set (int fd_, short events_) { fd = fd_; events = events_; } 125 void set (int fd_, short events_) { fd = fd_; events = events_; }
137 126
138 void set (short events_) { set (fd, events_); } 127 void set (short events_) { set (fd, events_); }
139 void start () { iom.reg (this); } 128 void start () { io_manager::reg (*this); }
140 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } 129 void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); }
141 void stop () { iom.unreg (this); } 130 void stop () { io_manager::unreg (*this); }
142 131
143 template<class O1, class O2> 132 template<class O1, class O2>
144 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 133 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
145 : callback2<void, io_watcher &, short>(object,method) 134 : callback2<void, io_watcher &, short> (object,method)
146 { } 135 { }
147 ~io_watcher () { stop (); } 136 ~io_watcher () { stop (); }
148}; 137};
149#endif 138#endif
150 139
… …
153 tstamp at; 142 tstamp at;
154 143
155 void trigger (); 144 void trigger ();
156 145
157 void set (tstamp when) { at = when; } 146 void set (tstamp when) { at = when; }
158 void operator ()() { trigger (); } 147 void operator () () { trigger (); }
159 void start () { iom.reg (this); } 148 void start () { io_manager::reg (*this); }
160 void start (tstamp when) { set (when); iom.reg (this); } 149 void start (tstamp when) { set (when); io_manager::reg (*this); }
161 void stop () { iom.unreg (this); } 150 void stop () { io_manager::unreg (*this); }
162 151
163 template<class O1, class O2> 152 template<class O1, class O2>
164 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 153 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
165 : callback1<void, time_watcher &>(object,method), at(0) 154 : callback1<void, time_watcher &> (object,method), at (0)
166 { } 155 { }
167 ~time_watcher () { stop (); } 156 ~time_watcher () { stop (); }
168}; 157};
169#endif 158#endif
170 159
171#if IOM_CHECK 160#if IOM_CHECK
172// run before checking for new events 161// run before checking for new events
173struct check_watcher : watcher, callback1<void, check_watcher &> { 162struct check_watcher : watcher, callback1<void, check_watcher &> {
174 void start () { iom.reg (this); } 163 void start () { io_manager::reg (*this); }
175 void stop () { iom.unreg (this); } 164 void stop () { io_manager::unreg (*this); }
176 165
177 template<class O1, class O2> 166 template<class O1, class O2>
178 check_watcher (O1 *object, void (O2::*method)(check_watcher &)) 167 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
179 : callback1<void, check_watcher &>(object,method) 168 : callback1<void, check_watcher &> (object,method)
180 { } 169 { }
181 ~check_watcher () { stop (); } 170 ~check_watcher () { stop (); }
182}; 171};
183#endif 172#endif
184 173
185#if IOM_IDLE 174#if IOM_IDLE
186// run after checking for any i/o, but before waiting 175// run after checking for any i/o, but before waiting
187struct idle_watcher : watcher, callback1<void, idle_watcher &> { 176struct idle_watcher : watcher, callback1<void, idle_watcher &> {
188 void start () { iom.reg (this); } 177 void start () { io_manager::reg (*this); }
189 void stop () { iom.unreg (this); } 178 void stop () { io_manager::unreg (*this); }
190 179
191 template<class O1, class O2> 180 template<class O1, class O2>
192 idle_watcher (O1 *object, void (O2::*method)(idle_watcher &)) 181 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
193 : callback1<void, idle_watcher &>(object,method) 182 : callback1<void, idle_watcher &> (object,method)
194 { } 183 { }
195 ~idle_watcher () { stop (); } 184 ~idle_watcher () { stop (); }
196}; 185};
197#endif 186#endif
198 187
199#endif 188#if IOM_SIG
189struct sig_watcher : watcher, callback1<void, sig_watcher &> {
190 int signum;
200 191
192 void start (int signum);
193 void stop () { io_manager::unreg (*this); }
194
195 template<class O1, class O2>
196 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
197 : callback1<void, sig_watcher &> (object,method), signum (-1)
198 { }
199 ~sig_watcher () { stop (); }
200};
201#endif
202
203#endif
204

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