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Comparing rxvt-unicode/src/iom.h (file contents):
Revision 1.3 by pcg, Sat Nov 29 18:42:07 2003 UTC vs.
Revision 1.8 by pcg, Sat Jan 17 14:10:40 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
30#undef IOM_CHECK 37#ifndef IOM_CHECK
38# define IOM_CHECK 0
39#endif
40#ifndef IOM_IDLE
41# define IOM_IDLE 0
42#endif
31 43
44typedef double tstamp;
45extern tstamp NOW;
46
47struct watcher;
32#if IOM_IO 48#if IOM_IO
33 typedef double tstamp;
34 extern tstamp NOW;
35
36 struct io_watcher; 49struct io_watcher;
37#endif 50#endif
38#if IOM_TIME 51#if IOM_TIME
39 struct time_watcher; 52struct time_watcher;
40#endif 53#endif
41#if IOM_CHECK 54#if IOM_CHECK
42 struct check_watcher; 55struct check_watcher;
43#endif 56#endif
57#if IOM_IDLE
58struct idle_watcher;
59#endif
60
61template<class watcher>
62struct io_manager_vec : protected vector<watcher *> {
63 friend class io_manager;
64protected:
65 void erase_unordered (unsigned int pos)
66 {
67 watcher *w = (*this)[size () - 1];
68 pop_back ();
69
70 if (size ())
71 if ((*this)[pos] = w)
72 w->active = pos + 1;
73 }
74};
44 75
45class io_manager { 76class io_manager {
46#if IOM_IO 77#if IOM_IO
47 simplevec<io_watcher *> iow; 78 io_manager_vec<io_watcher> iow;
48#endif 79#endif
49#if IOM_CHECK 80#if IOM_CHECK
50 simplevec<check_watcher *> cw; 81 io_manager_vec<check_watcher> cw;
51#endif 82#endif
52#if IOM_TIME 83#if IOM_TIME
53 simplevec<time_watcher *> tw; 84 io_manager_vec<time_watcher> tw;
85#endif
86#if IOM_IDLE
87 io_manager_vec<idle_watcher> iw;
54#endif 88#endif
55 89
56 template<class watcher> 90 template<class watcher>
57 void reg (watcher *w, simplevec<watcher *> &queue); 91 void reg (watcher *w, io_manager_vec<watcher> &queue);
58 92
59 template<class watcher> 93 template<class watcher>
60 void unreg (watcher *w, simplevec<watcher *> &queue); 94 void unreg (watcher *w, io_manager_vec<watcher> &queue);
61 95
62public: 96public:
63 // register a watcher 97 // register a watcher
64#if IOM_IO 98#if IOM_IO
65 void reg (io_watcher *w); void unreg (io_watcher *w); 99 void reg (io_watcher *w); void unreg (io_watcher *w);
66#endif 100#endif
67#if IOM_TIME 101#if IOM_TIME
68 void reg (time_watcher *w); void unreg (time_watcher *w); 102 void reg (time_watcher *w); void unreg (time_watcher *w);
69#endif 103#endif
70#if IOM_CHECK 104#if IOM_CHECK
71 void reg (check_watcher *w); void unreg (check_watcher *w); 105 void reg (check_watcher *w); void unreg (check_watcher *w);
106#endif
107#if IOM_IDLE
108 void reg (idle_watcher *w); void unreg (idle_watcher *w);
72#endif 109#endif
73 110
74 void loop (); 111 void loop ();
75 112
76 io_manager (); 113 io_manager ();
77 ~io_manager (); 114 ~io_manager ();
78}; 115};
79 116
80extern io_manager iom; // a singleton, together with it's construction/destruction problems. 117extern io_manager iom; // a singleton, together with it's construction/destruction problems.
81 118
119struct watcher {
120 int active; /* 0 == inactive, else index into respective vector */
121
122 watcher() : active(0) { }
123};
124
82#if IOM_IO 125#if IOM_IO
83enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 126enum { EVENT_READ = 1, EVENT_WRITE = 2 };
84 127
85struct io_watcher : callback2<void, io_watcher &, short> { 128struct io_watcher : watcher, callback2<void, io_watcher &, short> {
86 int fd; 129 int fd;
87 short events; 130 short events;
88 131
132 void set (int fd_, short events_) { fd = fd_; events = events_; }
133
134 void set (short events_) { set (fd, events_); }
135 void start () { iom.reg (this); }
136 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); }
137 void stop () { iom.unreg (this); }
138
89 template<class O1, class O2> 139 template<class O1, class O2>
90 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 140 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short))
91 : callback2<void, io_watcher &, short>(object,method) 141 : callback2<void, io_watcher &, short>(object,method)
92 { } 142 { }
93 143 ~io_watcher () { stop (); }
94 ~io_watcher ();
95
96 void set(int fd_, short events_) { fd = fd_; events = events_; }
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); }
101}; 144};
102#endif 145#endif
103 146
104#if IOM_TIME 147#if IOM_TIME
105enum { TSTAMP_CANCEL = -1 };
106
107struct time_watcher : callback1<void, time_watcher &> { 148struct time_watcher : watcher, callback1<void, time_watcher &> {
108 tstamp at; 149 tstamp at;
109
110 template<class O1, class O2>
111 time_watcher (O1 *object, void (O2::*method)(time_watcher &))
112 : callback1<void, time_watcher &>(object,method)
113 { }
114
115 ~time_watcher ();
116 150
117 void trigger (); 151 void trigger ();
118 152
119 void set (tstamp when) { at = when; } 153 void set (tstamp when) { at = when; }
120 void operator ()() { trigger (); } 154 void operator ()() { trigger (); }
121 void start () { iom.reg (this); } 155 void start () { iom.reg (this); }
122 void start (tstamp when) { set (when); iom.reg (this); } 156 void start (tstamp when) { set (when); iom.reg (this); }
123 void stop () { iom.unreg (this); } 157 void stop () { iom.unreg (this); }
124 158
125 void reset (tstamp when = TSTAMP_CANCEL) 159 template<class O1, class O2>
126 { 160 time_watcher (O1 *object, void (O2::*method)(time_watcher &))
127 stop (); 161 : callback1<void, time_watcher &>(object,method), at(0)
128 at = when;
129 } 162 { }
163 ~time_watcher () { stop (); }
130}; 164};
131#endif 165#endif
132 166
133#if IOM_CHECK 167#if IOM_CHECK
134// run before checking for new events 168// run before checking for new events
135struct check_watcher : callback1<void, check_watcher &> { 169struct check_watcher : watcher, callback1<void, check_watcher &> {
170 void start () { iom.reg (this); }
171 void stop () { iom.unreg (this); }
172
136 template<class O1, class O2> 173 template<class O1, class O2>
137 check_watcher (O1 *object, void (O2::*method)(check_watcher &)) 174 check_watcher (O1 *object, void (O2::*method)(check_watcher &))
138 : callback1<void, check_watcher &>(object,method) 175 : callback1<void, check_watcher &>(object,method)
139 { } 176 { }
177 ~check_watcher () { stop (); }
178};
179#endif
140 180
141 ~check_watcher (); 181#if IOM_IDLE
142 182// run after checking for any i/o, but before waiting
183struct idle_watcher : watcher, callback1<void, idle_watcher &> {
143 void start () { iom.reg (this); } 184 void start () { iom.reg (this); }
144 void stop () { iom.unreg (this); } 185 void stop () { iom.unreg (this); }
186
187 template<class O1, class O2>
188 idle_watcher (O1 *object, void (O2::*method)(idle_watcher &))
189 : callback1<void, idle_watcher &>(object,method)
190 { }
191 ~idle_watcher () { stop (); }
145}; 192};
146#endif 193#endif
147 194
148#endif 195#endif
149 196

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