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Comparing rxvt-unicode/src/iom.h (file contents):
Revision 1.5 by pcg, Fri Dec 19 06:17:03 2003 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 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
8 (at your option) any later version. 8 (at your option) any later version.
… …
15 You should have received a copy of the GNU General Public License 15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software 16 along with this program; if not, write to the Free Software
17 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18*/ 18*/
19 19
20#ifndef VPE_IOM_H__ 20#ifndef IOM_H__
21#define VPE_IOM_H__ 21#define IOM_H__
22 22
23#include <cassert> 23// required:
24// - a vector template like simplevec or stl's vector
25// - defines for all watcher types required in your app
26// edit iom_conf.h as appropriate.
27#include "iom_conf.h"
24 28
25#include "rxvtvec.h"
26#include "callback.h" 29#include "callback.h"
27 30
31#ifndef IOM_IO
28#define IOM_IO 1 32# define IOM_IO 0
33#endif
34#ifndef IOM_TIME
29#define IOM_TIME 1 35# define IOM_TIME 0
36#endif
37#ifndef IOM_CHECK
30#define IOM_CHECK 1 38# define IOM_CHECK 0
39#endif
40#ifndef IOM_IDLE
31#define IOM_IDLE 0 41# define IOM_IDLE 0
42#endif
43#ifndef IOM_SIG
44# define IOM_SIG 0
45#endif
32 46
47typedef double tstamp;
48extern tstamp NOW;
49
50struct watcher;
33#if IOM_IO 51#if IOM_IO
34 typedef double tstamp;
35 extern tstamp NOW;
36
37 struct io_watcher; 52struct io_watcher;
38#endif 53#endif
39#if IOM_TIME 54#if IOM_TIME
40 struct time_watcher; 55struct time_watcher;
41#endif 56#endif
42#if IOM_CHECK 57#if IOM_CHECK
43 struct check_watcher; 58struct check_watcher;
44#endif 59#endif
45#if IOM_IDLE 60#if IOM_IDLE
46 struct idle_watcher; 61struct idle_watcher;
47#endif 62#endif
63#if IOM_SIG
64struct sig_watcher;
65#endif
48 66
67template<class watcher>
68struct io_manager_vec : vector<watcher *> {
69 void erase_unordered (unsigned int pos)
70 {
71 watcher *w = (*this)[this->size () - 1];
72 this->pop_back ();
73
74 if (!this->empty ())
75 if (((*this)[pos] = w)) // '=' is correct!
76 w->active = pos + 1;
77 }
78};
79
80// only used as a namespace, and for initialisation purposes
49class io_manager { 81class io_manager {
50#if IOM_IO
51 simplevec<io_watcher *> iow;
52#endif
53#if IOM_CHECK
54 simplevec<check_watcher *> cw;
55#endif
56#if IOM_TIME
57 simplevec<time_watcher *> tw;
58#endif
59#if IOM_IDLE
60 simplevec<idle_watcher *> iw;
61#endif
62
63 template<class watcher> 82 template<class watcher>
64 void reg (watcher *w, simplevec<watcher *> &queue); 83 static void reg (watcher &w, io_manager_vec<watcher> &queue);
65 84
66 template<class watcher> 85 template<class watcher>
67 void unreg (watcher *w, simplevec<watcher *> &queue); 86 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
68 87
69public: 88public:
70 // register a watcher 89 // register a watcher
71#if IOM_IO 90#if IOM_IO
72 void reg (io_watcher *w); void unreg (io_watcher *w); 91 static void reg (io_watcher &w); static void unreg (io_watcher &w);
73#endif 92#endif
74#if IOM_TIME 93#if IOM_TIME
75 void reg (time_watcher *w); void unreg (time_watcher *w); 94 static void reg (time_watcher &w); static void unreg (time_watcher &w);
76#endif 95#endif
77#if IOM_CHECK 96#if IOM_CHECK
78 void reg (check_watcher *w); void unreg (check_watcher *w); 97 static void reg (check_watcher &w); static void unreg (check_watcher &w);
79#endif 98#endif
80#if IOM_IDLE 99#if IOM_IDLE
81 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);
82#endif 104#endif
83 105
84 void loop (); 106 static void loop ();
85
86 io_manager ();
87 ~io_manager ();
88}; 107};
89 108
90extern io_manager iom; // a singleton, together with it's construction/destruction problems. 109struct watcher {
110 int active; /* 0 == inactive, else index into respective vector */
111
112 watcher () : active (0) { }
113};
91 114
92#if IOM_IO 115#if IOM_IO
93enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 116enum { EVENT_READ = 1, EVENT_WRITE = 2 };
94 117
95struct io_watcher : callback2<void, io_watcher &, short> { 118struct io_watcher : watcher, callback2<void, io_watcher &, short> {
96 int fd; 119 int fd;
97 short events; 120 short events;
98 121
99 template<class O1, class O2>
100 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short))
101 : callback2<void, io_watcher &, short>(object,method)
102 { }
103
104 ~io_watcher ();
105
106 void set (int fd_, short events_) { fd = fd_; events = events_; } 122 void set (int fd_, short events_) { fd = fd_; events = events_; }
107 123
108 void set (short events_) { set (fd, events_); } 124 void set (short events_) { set (fd, events_); }
109 void start () { iom.reg (this); } 125 void start () { io_manager::reg (*this); }
110 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); }
111 void stop () { iom.unreg (this); } 127 void stop () { io_manager::unreg (*this); }
128
129 template<class O1, class O2>
130 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
131 : callback2<void, io_watcher &, short> (object,method)
132 { }
133 ~io_watcher () { stop (); }
112}; 134};
113#endif 135#endif
114 136
115#if IOM_TIME 137#if IOM_TIME
116enum { TSTAMP_CANCEL = -1 };
117
118struct time_watcher : callback1<void, time_watcher &> { 138struct time_watcher : watcher, callback1<void, time_watcher &> {
119 tstamp at; 139 tstamp at;
120 140
121 template<class O1, class O2>
122 time_watcher (O1 *object, void (O2::*method)(time_watcher &))
123 : callback1<void, time_watcher &>(object,method)
124 { }
125
126 ~time_watcher ();
127
128 void trigger (); 141 void trigger ();
129 142
130 void set (tstamp when) { at = when; } 143 void set (tstamp when) { at = when; }
131 void operator ()() { trigger (); } 144 void operator () () { trigger (); }
132 void start () { iom.reg (this); } 145 void start () { io_manager::reg (*this); }
133 void start (tstamp when) { set (when); iom.reg (this); } 146 void start (tstamp when) { set (when); io_manager::reg (*this); }
134 void stop () { iom.unreg (this); } 147 void stop () { io_manager::unreg (*this); }
135 148
136 void reset (tstamp when = TSTAMP_CANCEL) 149 template<class O1, class O2>
137 { 150 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
138 stop (); 151 : callback1<void, time_watcher &> (object,method), at (0)
139 at = when;
140 } 152 { }
153 ~time_watcher () { stop (); }
141}; 154};
142#endif 155#endif
143 156
144#if IOM_CHECK 157#if IOM_CHECK
145// run before checking for new events 158// run before checking for new events
146struct check_watcher : callback1<void, check_watcher &> { 159struct check_watcher : watcher, callback1<void, check_watcher &> {
160 void start () { io_manager::reg (*this); }
161 void stop () { io_manager::unreg (*this); }
162
147 template<class O1, class O2> 163 template<class O1, class O2>
148 check_watcher (O1 *object, void (O2::*method)(check_watcher &)) 164 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
149 : callback1<void, check_watcher &>(object,method) 165 : callback1<void, check_watcher &> (object,method)
150 { } 166 { }
151
152 ~check_watcher (); 167 ~check_watcher () { stop (); }
153
154 void start () { iom.reg (this); }
155 void stop () { iom.unreg (this); }
156}; 168};
157#endif 169#endif
158 170
159#if IOM_IDLE 171#if IOM_IDLE
160// run after checking for any i/o, but before waiting 172// run after checking for any i/o, but before waiting
161struct idle_watcher : callback1<void, idle_watcher &> { 173struct idle_watcher : watcher, callback1<void, idle_watcher &> {
174 void start () { io_manager::reg (*this); }
175 void stop () { io_manager::unreg (*this); }
176
162 template<class O1, class O2> 177 template<class O1, class O2>
163 idle_watcher (O1 *object, void (O2::*method)(idle_watcher &)) 178 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
164 : callback1<void, idle_watcher &>(object,method) 179 : callback1<void, idle_watcher &> (object,method)
165 { } 180 { }
166
167 ~idle_watcher (); 181 ~idle_watcher () { stop (); }
182};
183#endif
168 184
169 void start () { iom.reg (this); } 185#if IOM_SIG
186struct sig_watcher : watcher, callback1<void, sig_watcher &> {
187 int signum;
188
189 void start (int signum);
170 void stop () { iom.unreg (this); } 190 void stop () { io_manager::unreg (*this); }
171};
172#endif
173 191
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};
174#endif 198#endif
175 199
200#endif
201

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