ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/rxvt-unicode/src/iom.h
(Generate patch)

Comparing rxvt-unicode/src/iom.h (file contents):
Revision 1.1 by pcg, Mon Nov 24 17:28:08 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
32# define IOM_IO 0
33#endif
34#ifndef IOM_TIME
35# define IOM_TIME 0
36#endif
37#ifndef IOM_CHECK
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
46
28typedef double tstamp; 47typedef double tstamp;
29
30extern tstamp NOW; 48extern tstamp NOW;
31 49
50struct watcher;
51#if IOM_IO
32struct io_watcher; 52struct io_watcher;
53#endif
54#if IOM_TIME
33struct time_watcher; 55struct time_watcher;
56#endif
57#if IOM_CHECK
58struct check_watcher;
59#endif
60#if IOM_IDLE
61struct idle_watcher;
62#endif
63#if IOM_SIG
64struct sig_watcher;
65#endif
34 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
35class io_manager { 81class io_manager {
36 simplevec<io_watcher *> iow; 82 template<class watcher>
37 simplevec<time_watcher *> tw; // actually a heap 83 static void reg (watcher &w, io_manager_vec<watcher> &queue);
38 84
39 void idle_cb (time_watcher &w); time_watcher *idle; 85 template<class watcher>
86 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
87
40public: 88public:
41 // register a watcher 89 // register a watcher
42 void reg (io_watcher *w); 90#if IOM_IO
43 void unreg (io_watcher *w); 91 static void reg (io_watcher &w); static void unreg (io_watcher &w);
44 void reg (time_watcher *w); 92#endif
45 void unreg (time_watcher *w); 93#if IOM_TIME
94 static void reg (time_watcher &w); static void unreg (time_watcher &w);
95#endif
96#if IOM_CHECK
97 static void reg (check_watcher &w); static void unreg (check_watcher &w);
98#endif
99#if IOM_IDLE
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);
104#endif
46 105
47 void loop (); 106 static void loop ();
48
49 io_manager ();
50 ~io_manager ();
51}; 107};
52 108
53extern io_manager iom; // a singleton, together with it's construction/destruction problems. 109struct watcher {
110 int active; /* 0 == inactive, else index into respective vector */
54 111
112 watcher () : active (0) { }
113};
114
115#if IOM_IO
55enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 116enum { EVENT_READ = 1, EVENT_WRITE = 2 };
56 117
57struct io_watcher : callback2<void, io_watcher &, short> { 118struct io_watcher : watcher, callback2<void, io_watcher &, short> {
58 int fd; 119 int fd;
59 short events; 120 short events;
60 121
122 void set (int fd_, short events_) { fd = fd_; events = events_; }
123
124 void set (short events_) { set (fd, events_); }
125 void start () { io_manager::reg (*this); }
126 void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); }
127 void stop () { io_manager::unreg (*this); }
128
61 template<class O1, class O2> 129 template<class O1, class O2>
62 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 130 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
63 : callback2<void, io_watcher &, short>(object,method) 131 : callback2<void, io_watcher &, short> (object,method)
132 { }
133 ~io_watcher () { stop (); }
134};
135#endif
136
137#if IOM_TIME
138struct time_watcher : watcher, callback1<void, time_watcher &> {
139 tstamp at;
140
141 void trigger ();
142
143 void set (tstamp when) { at = when; }
144 void operator () () { trigger (); }
145 void start () { io_manager::reg (*this); }
146 void start (tstamp when) { set (when); io_manager::reg (*this); }
147 void stop () { io_manager::unreg (*this); }
148
149 template<class O1, class O2>
150 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
151 : callback1<void, time_watcher &> (object,method), at (0)
152 { }
153 ~time_watcher () { stop (); }
154};
155#endif
156
157#if IOM_CHECK
158// run before checking for new events
159struct check_watcher : watcher, callback1<void, check_watcher &> {
160 void start () { io_manager::reg (*this); }
161 void stop () { io_manager::unreg (*this); }
162
163 template<class O1, class O2>
164 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
165 : callback1<void, check_watcher &> (object,method)
166 { }
167 ~check_watcher () { stop (); }
168};
169#endif
170
171#if IOM_IDLE
172// run after checking for any i/o, but before waiting
173struct idle_watcher : watcher, callback1<void, idle_watcher &> {
174 void start () { io_manager::reg (*this); }
175 void stop () { io_manager::unreg (*this); }
176
177 template<class O1, class O2>
178 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
179 : callback1<void, idle_watcher &> (object,method)
64 { } 180 { }
181 ~idle_watcher () { stop (); }
182};
183#endif
65 184
66 ~io_watcher (); 185#if IOM_SIG
186struct sig_watcher : watcher, callback1<void, sig_watcher &> {
187 int signum;
67 188
68 void set(int fd_, short events_) { fd = fd_; events = events_; } 189 void start (int signum);
69
70 void set(short events_) { set (fd, events_); }
71 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); }
72 void stop () { iom.unreg (this); } 190 void stop () { io_manager::unreg (*this); }
73};
74 191
75#define TSTAMP_CANCEL -1.
76
77struct time_watcher : callback1<void, time_watcher &> {
78 tstamp at;
79
80 template<class O1, class O2> 192 template<class O1, class O2>
81 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 193 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
82 : callback1<void, time_watcher &>(object,method) 194 : callback1<void, sig_watcher &> (object,method), signum (-1)
83 { } 195 { }
84 196 ~sig_watcher () { stop (); }
85 ~time_watcher ();
86
87 void trigger ();
88
89 void set (tstamp when) { at = when; }
90 void operator ()() { trigger (); }
91 void start () { iom.reg (this); }
92 void start (tstamp when) { set (when); iom.reg (this); }
93 void stop () { iom.unreg (this); }
94
95 void reset (tstamp when = TSTAMP_CANCEL)
96 {
97 stop ();
98 at = when;
99 }
100}; 197};
101
102#endif 198#endif
103 199
200#endif
201

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines