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Comparing gvpe/src/iom.h (file contents):
Revision 1.18 by pcg, Sun Mar 21 12:50:05 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 : vector<watcher *> { 68struct io_manager_vec : vector<watcher *> {
63#if IOM_CHECK
64 bool activity;
65#endif
66
67 void erase_unordered (unsigned int pos) 69 void erase_unordered (unsigned int pos)
68 { 70 {
69 watcher *w = (*this)[size () - 1]; 71 watcher *w = (*this)[this->size () - 1];
70 pop_back (); 72 this->pop_back ();
71 73
72 if (size ()) 74 if (!this->empty ())
73 if ((*this)[pos] = w) 75 if (((*this)[pos] = w)) // '=' is correct!
74 w->active = pos + 1; 76 w->active = pos + 1;
75 } 77 }
76}; 78};
77 79
80// only used as a namespace, and for initialisation purposes
78class io_manager { 81class io_manager {
79#if IOM_IO
80 io_manager_vec<io_watcher> iow;
81#endif
82#if IOM_CHECK
83 io_manager_vec<check_watcher> cw;
84#endif
85#if IOM_TIME
86 io_manager_vec<time_watcher> tw;
87#endif
88#if IOM_IDLE
89 io_manager_vec<idle_watcher> iw;
90#endif
91
92 template<class watcher> 82 template<class watcher>
93 void reg (watcher *w, io_manager_vec<watcher> &queue); 83 static void reg (watcher &w, io_manager_vec<watcher> &queue);
94 84
95 template<class watcher> 85 template<class watcher>
96 void unreg (watcher *w, io_manager_vec<watcher> &queue); 86 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
97 87
98public: 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
99 // register a watcher 97 // register a watcher
100#if IOM_IO 98#if IOM_IO
101 void reg (io_watcher *w); void unreg (io_watcher *w); 99 static void reg (io_watcher &w); static void unreg (io_watcher &w);
102#endif 100#endif
103#if IOM_TIME 101#if IOM_TIME
104 void reg (time_watcher *w); void unreg (time_watcher *w); 102 static void reg (time_watcher &w); static void unreg (time_watcher &w);
105#endif 103#endif
106#if IOM_CHECK 104#if IOM_CHECK
107 void reg (check_watcher *w); void unreg (check_watcher *w); 105 static void reg (check_watcher &w); static void unreg (check_watcher &w);
108#endif 106#endif
109#if IOM_IDLE 107#if IOM_IDLE
110 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);
111#endif 112#endif
112 113
113 void loop (); 114 static void loop ();
114
115 io_manager ();
116 ~io_manager ();
117}; 115};
118
119extern io_manager iom; // a singleton, together with it's construction/destruction problems.
120 116
121struct watcher { 117struct watcher {
122 int active; /* 0 == inactive, else index into respective vector */ 118 int active; /* 0 == inactive, else index into respective vector */
123 119
124 watcher() : active(0) { } 120 watcher () : active (0) { }
125}; 121};
126 122
127#if IOM_IO 123#if IOM_IO
128enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 124enum { EVENT_READ = 1, EVENT_WRITE = 2 };
129 125
… …
132 short events; 128 short events;
133 129
134 void set (int fd_, short events_) { fd = fd_; events = events_; } 130 void set (int fd_, short events_) { fd = fd_; events = events_; }
135 131
136 void set (short events_) { set (fd, events_); } 132 void set (short events_) { set (fd, events_); }
137 void start () { iom.reg (this); } 133 void start () { io_manager::reg (*this); }
138 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); }
139 void stop () { iom.unreg (this); } 135 void stop () { io_manager::unreg (*this); }
140 136
141 template<class O1, class O2> 137 template<class O1, class O2>
142 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 138 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
143 : callback2<void, io_watcher &, short>(object,method) 139 : callback2<void, io_watcher &, short> (object,method)
144 { } 140 { }
145 ~io_watcher () { stop (); } 141 ~io_watcher () { stop (); }
146}; 142};
147#endif 143#endif
148 144
… …
151 tstamp at; 147 tstamp at;
152 148
153 void trigger (); 149 void trigger ();
154 150
155 void set (tstamp when) { at = when; } 151 void set (tstamp when) { at = when; }
156 void operator ()() { trigger (); } 152 void operator () () { trigger (); }
157 void start () { iom.reg (this); } 153 void start () { io_manager::reg (*this); }
158 void start (tstamp when) { set (when); iom.reg (this); } 154 void start (tstamp when) { set (when); io_manager::reg (*this); }
159 void stop () { iom.unreg (this); } 155 void stop () { io_manager::unreg (*this); }
160 156
161 template<class O1, class O2> 157 template<class O1, class O2>
162 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 158 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
163 : callback1<void, time_watcher &>(object,method), at(0) 159 : callback1<void, time_watcher &> (object,method), at (0)
164 { } 160 { }
165 ~time_watcher () { stop (); } 161 ~time_watcher () { stop (); }
166}; 162};
167#endif 163#endif
168 164
169#if IOM_CHECK 165#if IOM_CHECK
170// run before checking for new events 166// run before checking for new events
171struct check_watcher : watcher, callback1<void, check_watcher &> { 167struct check_watcher : watcher, callback1<void, check_watcher &> {
172 void start () { iom.reg (this); } 168 void start () { io_manager::reg (*this); }
173 void stop () { iom.unreg (this); } 169 void stop () { io_manager::unreg (*this); }
174 170
175 template<class O1, class O2> 171 template<class O1, class O2>
176 check_watcher (O1 *object, void (O2::*method)(check_watcher &)) 172 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
177 : callback1<void, check_watcher &>(object,method) 173 : callback1<void, check_watcher &> (object,method)
178 { } 174 { }
179 ~check_watcher () { stop (); } 175 ~check_watcher () { stop (); }
180}; 176};
181#endif 177#endif
182 178
183#if IOM_IDLE 179#if IOM_IDLE
184// run after checking for any i/o, but before waiting 180// run after checking for any i/o, but before waiting
185struct idle_watcher : watcher, callback1<void, idle_watcher &> { 181struct idle_watcher : watcher, callback1<void, idle_watcher &> {
186 void start () { iom.reg (this); } 182 void start () { io_manager::reg (*this); }
187 void stop () { iom.unreg (this); } 183 void stop () { io_manager::unreg (*this); }
188 184
189 template<class O1, class O2> 185 template<class O1, class O2>
190 idle_watcher (O1 *object, void (O2::*method)(idle_watcher &)) 186 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
191 : callback1<void, idle_watcher &>(object,method) 187 : callback1<void, idle_watcher &> (object,method)
192 { } 188 { }
193 ~idle_watcher () { stop (); } 189 ~idle_watcher () { stop (); }
194}; 190};
195#endif 191#endif
196 192
197#endif 193#if IOM_SIG
194struct sig_watcher : watcher, callback1<void, sig_watcher &> {
195 int signum;
198 196
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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