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Comparing rxvt-unicode/src/iom.h (file contents):
Revision 1.9 by pcg, Thu Jan 29 23:26:01 2004 UTC vs.
Revision 1.20 by root, Fri Nov 12 12:43:27 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#if IOM_CHECK
66 bool activity;
67#endif
68
69 void erase_unordered (unsigned int pos) 69 void erase_unordered (unsigned int pos)
70 { 70 {
71 watcher *w = (*this)[size () - 1]; 71 watcher *w = (*this)[this->size () - 1];
72 pop_back (); 72 this->pop_back ();
73 73
74 if (size ()) 74 if (!this->empty ())
75 if ((*this)[pos] = w) 75 if (((*this)[pos] = w)) // '=' is correct!
76 w->active = pos + 1; 76 w->active = pos + 1;
77 } 77 }
78}; 78};
79 79
80// only used as a namespace, and for initialisation purposes
80class io_manager { 81class 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> 82 template<class watcher>
95 void reg (watcher *w, io_manager_vec<watcher> &queue); 83 static void reg (watcher &w, io_manager_vec<watcher> &queue);
96 84
97 template<class watcher> 85 template<class watcher>
98 void unreg (watcher *w, io_manager_vec<watcher> &queue); 86 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
99 87
100public: 88public:
101 // register a watcher 89 // register a watcher
102#if IOM_IO 90#if IOM_IO
103 void reg (io_watcher *w); void unreg (io_watcher *w); 91 static void reg (io_watcher &w); static void unreg (io_watcher &w);
104#endif 92#endif
105#if IOM_TIME 93#if IOM_TIME
106 void reg (time_watcher *w); void unreg (time_watcher *w); 94 static void reg (time_watcher &w); static void unreg (time_watcher &w);
107#endif 95#endif
108#if IOM_CHECK 96#if IOM_CHECK
109 void reg (check_watcher *w); void unreg (check_watcher *w); 97 static void reg (check_watcher &w); static void unreg (check_watcher &w);
110#endif 98#endif
111#if IOM_IDLE 99#if IOM_IDLE
112 void reg (idle_watcher *w); void unreg (idle_watcher *w); 100 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
101#endif
102#if IOM_SIG
103 static void reg (sig_watcher &w); static void unreg (sig_watcher &w);
113#endif 104#endif
114 105
115 void loop (); 106 static void loop ();
116
117 io_manager ();
118 ~io_manager ();
119}; 107};
120
121extern io_manager iom; // a singleton, together with it's construction/destruction problems.
122 108
123struct watcher { 109struct watcher {
124 int active; /* 0 == inactive, else index into respective vector */ 110 int active; /* 0 == inactive, else index into respective vector */
125 111
126 watcher() : active(0) { } 112 watcher () : active (0) { }
127}; 113};
128 114
129#if IOM_IO 115#if IOM_IO
130enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 116enum { EVENT_READ = 1, EVENT_WRITE = 2 };
131 117
… …
134 short events; 120 short events;
135 121
136 void set (int fd_, short events_) { fd = fd_; events = events_; } 122 void set (int fd_, short events_) { fd = fd_; events = events_; }
137 123
138 void set (short events_) { set (fd, events_); } 124 void set (short events_) { set (fd, events_); }
139 void start () { iom.reg (this); } 125 void start () { io_manager::reg (*this); }
140 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } 126 void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); }
141 void stop () { iom.unreg (this); } 127 void stop () { io_manager::unreg (*this); }
142 128
143 template<class O1, class O2> 129 template<class O1, class O2>
144 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 130 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
145 : callback2<void, io_watcher &, short>(object,method) 131 : callback2<void, io_watcher &, short> (object,method)
146 { } 132 { }
147 ~io_watcher () { stop (); } 133 ~io_watcher () { stop (); }
148}; 134};
149#endif 135#endif
150 136
… …
153 tstamp at; 139 tstamp at;
154 140
155 void trigger (); 141 void trigger ();
156 142
157 void set (tstamp when) { at = when; } 143 void set (tstamp when) { at = when; }
158 void operator ()() { trigger (); } 144 void operator () () { trigger (); }
159 void start () { iom.reg (this); } 145 void start () { io_manager::reg (*this); }
160 void start (tstamp when) { set (when); iom.reg (this); } 146 void start (tstamp when) { set (when); io_manager::reg (*this); }
161 void stop () { iom.unreg (this); } 147 void stop () { io_manager::unreg (*this); }
162 148
163 template<class O1, class O2> 149 template<class O1, class O2>
164 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 150 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
165 : callback1<void, time_watcher &>(object,method), at(0) 151 : callback1<void, time_watcher &> (object,method), at (0)
166 { } 152 { }
167 ~time_watcher () { stop (); } 153 ~time_watcher () { stop (); }
168}; 154};
169#endif 155#endif
170 156
171#if IOM_CHECK 157#if IOM_CHECK
172// run before checking for new events 158// run before checking for new events
173struct check_watcher : watcher, callback1<void, check_watcher &> { 159struct check_watcher : watcher, callback1<void, check_watcher &> {
174 void start () { iom.reg (this); } 160 void start () { io_manager::reg (*this); }
175 void stop () { iom.unreg (this); } 161 void stop () { io_manager::unreg (*this); }
176 162
177 template<class O1, class O2> 163 template<class O1, class O2>
178 check_watcher (O1 *object, void (O2::*method)(check_watcher &)) 164 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
179 : callback1<void, check_watcher &>(object,method) 165 : callback1<void, check_watcher &> (object,method)
180 { } 166 { }
181 ~check_watcher () { stop (); } 167 ~check_watcher () { stop (); }
182}; 168};
183#endif 169#endif
184 170
185#if IOM_IDLE 171#if IOM_IDLE
186// run after checking for any i/o, but before waiting 172// run after checking for any i/o, but before waiting
187struct idle_watcher : watcher, callback1<void, idle_watcher &> { 173struct idle_watcher : watcher, callback1<void, idle_watcher &> {
188 void start () { iom.reg (this); } 174 void start () { io_manager::reg (*this); }
189 void stop () { iom.unreg (this); } 175 void stop () { io_manager::unreg (*this); }
190 176
191 template<class O1, class O2> 177 template<class O1, class O2>
192 idle_watcher (O1 *object, void (O2::*method)(idle_watcher &)) 178 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
193 : callback1<void, idle_watcher &>(object,method) 179 : callback1<void, idle_watcher &> (object,method)
194 { } 180 { }
195 ~idle_watcher () { stop (); } 181 ~idle_watcher () { stop (); }
196}; 182};
197#endif 183#endif
198 184
199#endif 185#if IOM_SIG
186struct sig_watcher : watcher, callback1<void, sig_watcher &> {
187 int signum;
200 188
189 void start (int signum);
190 void stop () { io_manager::unreg (*this); }
191
192 template<class O1, class O2>
193 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
194 : callback1<void, sig_watcher &> (object,method), signum (-1)
195 { }
196 ~sig_watcher () { stop (); }
197};
198#endif
199
200#endif
201

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