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Comparing rxvt-unicode/src/iom.h (file contents):
Revision 1.4 by pcg, Tue Dec 2 21:49:46 2003 UTC vs.
Revision 1.15 by root, Thu Sep 2 07:44:40 2004 UTC

1/* 1/*
2 iom.h -- generic I/O multiplexor 2 iom.h -- generic I/O multiplexor
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
41# define IOM_IDLE 0
42#endif
43#ifndef IOM_SIG
44# define IOM_SIG 0
45#endif
31 46
47typedef double tstamp;
48extern tstamp NOW;
49
50struct watcher;
32#if IOM_IO 51#if IOM_IO
33 typedef double tstamp;
34 extern tstamp NOW;
35
36 struct io_watcher; 52struct io_watcher;
37#endif 53#endif
38#if IOM_TIME 54#if IOM_TIME
39 struct time_watcher; 55struct time_watcher;
40#endif 56#endif
41#if IOM_CHECK 57#if IOM_CHECK
42 struct check_watcher; 58struct check_watcher;
43#endif 59#endif
60#if IOM_IDLE
61struct idle_watcher;
62#endif
63#if IOM_SIG
64struct sig_watcher;
65#endif
44 66
67template<class watcher>
68struct io_manager_vec : vector<watcher *> {
69#if IOM_CHECK
70 bool activity;
71#endif
72
73 void erase_unordered (unsigned int pos)
74 {
75 watcher *w = (*this)[this->size () - 1];
76 this->pop_back ();
77
78 if (this->size ())
79 if ((*this)[pos] = w)
80 w->active = pos + 1;
81 }
82};
83
84// only used as a namespace, and for initialisation purposes
45class io_manager { 85class io_manager {
46#if IOM_IO
47 simplevec<io_watcher *> iow;
48#endif
49#if IOM_CHECK
50 simplevec<check_watcher *> cw;
51#endif
52#if IOM_TIME
53 simplevec<time_watcher *> tw;
54#endif
55
56 template<class watcher> 86 template<class watcher>
57 void reg (watcher *w, simplevec<watcher *> &queue); 87 static void reg (watcher &w, io_manager_vec<watcher> &queue);
58 88
59 template<class watcher> 89 template<class watcher>
60 void unreg (watcher *w, simplevec<watcher *> &queue); 90 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
61 91
62public: 92public:
63 // register a watcher 93 // register a watcher
64#if IOM_IO 94#if IOM_IO
65 void reg (io_watcher *w); void unreg (io_watcher *w); 95 static void reg (io_watcher &w); static void unreg (io_watcher &w);
66#endif 96#endif
67#if IOM_TIME 97#if IOM_TIME
68 void reg (time_watcher *w); void unreg (time_watcher *w); 98 static void reg (time_watcher &w); static void unreg (time_watcher &w);
69#endif 99#endif
70#if IOM_CHECK 100#if IOM_CHECK
71 void reg (check_watcher *w); void unreg (check_watcher *w); 101 static void reg (check_watcher &w); static void unreg (check_watcher &w);
102#endif
103#if IOM_IDLE
104 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
105#endif
106#if IOM_SIG
107 static void reg (sig_watcher &w); static void unreg (sig_watcher &w);
72#endif 108#endif
73 109
74 void loop (); 110 static void loop ();
75
76 io_manager ();
77 ~io_manager ();
78}; 111};
79 112
80extern io_manager iom; // a singleton, together with it's construction/destruction problems. 113struct watcher {
114 int active; /* 0 == inactive, else index into respective vector */
115
116 watcher () : active (0) { }
117};
81 118
82#if IOM_IO 119#if IOM_IO
83enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 120enum { EVENT_READ = 1, EVENT_WRITE = 2 };
84 121
85struct io_watcher : callback2<void, io_watcher &, short> { 122struct io_watcher : watcher, callback2<void, io_watcher &, short> {
86 int fd; 123 int fd;
87 short events; 124 short events;
88 125
126 void set (int fd_, short events_) { fd = fd_; events = events_; }
127
128 void set (short events_) { set (fd, events_); }
129 void start () { io_manager::reg (*this); }
130 void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); }
131 void stop () { io_manager::unreg (*this); }
132
89 template<class O1, class O2> 133 template<class O1, class O2>
90 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 134 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
91 : callback2<void, io_watcher &, short>(object,method) 135 : callback2<void, io_watcher &, short> (object,method)
136 { }
137 ~io_watcher () { stop (); }
138};
139#endif
140
141#if IOM_TIME
142struct time_watcher : watcher, callback1<void, time_watcher &> {
143 tstamp at;
144
145 void trigger ();
146
147 void set (tstamp when) { at = when; }
148 void operator () () { trigger (); }
149 void start () { io_manager::reg (*this); }
150 void start (tstamp when) { set (when); io_manager::reg (*this); }
151 void stop () { io_manager::unreg (*this); }
152
153 template<class O1, class O2>
154 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
155 : callback1<void, time_watcher &> (object,method), at (0)
156 { }
157 ~time_watcher () { stop (); }
158};
159#endif
160
161#if IOM_CHECK
162// run before checking for new events
163struct check_watcher : watcher, callback1<void, check_watcher &> {
164 void start () { io_manager::reg (*this); }
165 void stop () { io_manager::unreg (*this); }
166
167 template<class O1, class O2>
168 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
169 : callback1<void, check_watcher &> (object,method)
170 { }
171 ~check_watcher () { stop (); }
172};
173#endif
174
175#if IOM_IDLE
176// run after checking for any i/o, but before waiting
177struct idle_watcher : watcher, callback1<void, idle_watcher &> {
178 void start () { io_manager::reg (*this); }
179 void stop () { io_manager::unreg (*this); }
180
181 template<class O1, class O2>
182 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
183 : callback1<void, idle_watcher &> (object,method)
92 { } 184 { }
185 ~idle_watcher () { stop (); }
186};
187#endif
93 188
94 ~io_watcher (); 189#if IOM_SIG
190struct sig_watcher : watcher, callback1<void, sig_watcher &> {
191 int signum;
95 192
96 void set(int fd_, short events_) { fd = fd_; events = events_; } 193 void start (int signum);
97
98 void set(short events_) { set (fd, events_); }
99 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); }
100 void stop () { iom.unreg (this); } 194 void stop () { io_manager::unreg (*this); }
101};
102#endif
103 195
104#if IOM_TIME
105enum { TSTAMP_CANCEL = -1 };
106
107struct time_watcher : callback1<void, time_watcher &> {
108 tstamp at;
109
110 template<class O1, class O2> 196 template<class O1, class O2>
111 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 197 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
112 : callback1<void, time_watcher &>(object,method) 198 : callback1<void, sig_watcher &> (object,method), signum (-1)
113 { } 199 { }
114 200 ~sig_watcher () { stop (); }
115 ~time_watcher ();
116
117 void trigger ();
118
119 void set (tstamp when) { at = when; }
120 void operator ()() { trigger (); }
121 void start () { iom.reg (this); }
122 void start (tstamp when) { set (when); iom.reg (this); }
123 void stop () { iom.unreg (this); }
124
125 void reset (tstamp when = TSTAMP_CANCEL)
126 {
127 stop ();
128 at = when;
129 }
130}; 201};
131#endif 202#endif
132 203
133#if IOM_CHECK
134// run before checking for new events
135struct check_watcher : callback1<void, check_watcher &> {
136 template<class O1, class O2>
137 check_watcher (O1 *object, void (O2::*method)(check_watcher &))
138 : callback1<void, check_watcher &>(object,method)
139 { }
140
141 ~check_watcher ();
142
143 void start () { iom.reg (this); }
144 void stop () { iom.unreg (this); }
145};
146#endif 204#endif
147 205
148#endif
149

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