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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 1.23 by root, Tue Nov 29 19:22:48 2005 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 <gvpe@schmorp.de>
4 4
5 This file is part of GVPE.
6
5 This program is free software; you can redistribute it and/or modify 7 GVPE is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by 8 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 9 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version. 10 (at your option) any later version.
9 11
10 This program is distributed in the hope that it will be useful, 12 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details. 15 GNU General Public License for more details.
14 16
15 You should have received a copy of the GNU General Public License 17 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software 18 along with gvpe; if not, write to the Free Software
17 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18*/ 20*/
19 21
20#ifndef VPE_IOM_H__ 22#ifndef IOM_H__
21#define VPE_IOM_H__ 23#define IOM_H__
22 24
23#include <cassert> 25// required:
26// - a vector template like simplevec or stl's vector
27// - defines for all watcher types required in your app
28// edit iom_conf.h as appropriate.
29#include "iom_conf.h"
24 30
25#include "rxvtvec.h"
26#include "callback.h" 31#include "callback.h"
27 32
33#ifndef IOM_IO
28#define IOM_IO 1 34# define IOM_IO 0
35#endif
36#ifndef IOM_TIME
29#define IOM_TIME 1 37# define IOM_TIME 0
38#endif
39#ifndef IOM_CHECK
30#define IOM_CHECK 1 40# define IOM_CHECK 0
41#endif
42#ifndef IOM_IDLE
31#define IOM_IDLE 0 43# define IOM_IDLE 0
44#endif
45#ifndef IOM_SIG
46# define IOM_SIG 0
47#endif
32 48
49typedef double tstamp;
50extern tstamp NOW;
51
52// TSTAMP_MAX must still fit into a positive struct timeval
53#define TSTAMP_MAX (double)(1UL<<31)
54
55struct watcher;
33#if IOM_IO 56#if IOM_IO
34 typedef double tstamp;
35 extern tstamp NOW;
36
37 struct io_watcher; 57struct io_watcher;
38#endif 58#endif
39#if IOM_TIME 59#if IOM_TIME
40 struct time_watcher; 60struct time_watcher;
41#endif 61#endif
42#if IOM_CHECK 62#if IOM_CHECK
43 struct check_watcher; 63struct check_watcher;
44#endif 64#endif
45#if IOM_IDLE 65#if IOM_IDLE
46 struct idle_watcher; 66struct idle_watcher;
47#endif 67#endif
68#if IOM_SIG
69struct sig_watcher;
70#endif
48 71
72template<class watcher>
73struct io_manager_vec : vector<watcher *> {
74 void erase_unordered (unsigned int pos)
75 {
76 watcher *w = (*this)[this->size () - 1];
77 this->pop_back ();
78
79 if (!this->empty ())
80 if (((*this)[pos] = w)) // '=' is correct!
81 w->active = pos + 1;
82 }
83};
84
85// only used as a namespace, and for initialisation purposes
49class io_manager { 86class 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> 87 template<class watcher>
64 void reg (watcher *w, simplevec<watcher *> &queue); 88 static void reg (watcher &w, io_manager_vec<watcher> &queue);
65 89
66 template<class watcher> 90 template<class watcher>
67 void unreg (watcher *w, simplevec<watcher *> &queue); 91 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
68 92
69public: 93public:
94#if IOM_TIME
95 // fetch time only
96 static tstamp now ();
97
98 // set NOW
99 static void set_now ();
100#endif
101
70 // register a watcher 102 // register a watcher
71#if IOM_IO 103#if IOM_IO
72 void reg (io_watcher *w); void unreg (io_watcher *w); 104 static void reg (io_watcher &w); static void unreg (io_watcher &w);
73#endif 105#endif
74#if IOM_TIME 106#if IOM_TIME
75 void reg (time_watcher *w); void unreg (time_watcher *w); 107 static void reg (time_watcher &w); static void unreg (time_watcher &w);
76#endif 108#endif
77#if IOM_CHECK 109#if IOM_CHECK
78 void reg (check_watcher *w); void unreg (check_watcher *w); 110 static void reg (check_watcher &w); static void unreg (check_watcher &w);
79#endif 111#endif
80#if IOM_IDLE 112#if IOM_IDLE
81 void reg (idle_watcher *w); void unreg (idle_watcher *w); 113 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
114#endif
115#if IOM_SIG
116 static void reg (sig_watcher &w); static void unreg (sig_watcher &w);
82#endif 117#endif
83 118
84 void loop (); 119 static void loop ();
85
86 io_manager ();
87 ~io_manager ();
88}; 120};
89 121
90extern io_manager iom; // a singleton, together with it's construction/destruction problems. 122struct watcher {
123 int active; /* 0 == inactive, else index into respective vector */
124
125 watcher () : active (0) { }
126};
91 127
92#if IOM_IO 128#if IOM_IO
93enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 129enum { EVENT_READ = 1, EVENT_WRITE = 2 };
94 130
95struct io_watcher : callback2<void, io_watcher &, short> { 131struct io_watcher : watcher, callback2<void, io_watcher &, short> {
96 int fd; 132 int fd;
97 short events; 133 short events;
98 134
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_; } 135 void set (int fd_, short events_) { fd = fd_; events = events_; }
107 136
108 void set (short events_) { set (fd, events_); } 137 void set (short events_) { set (fd, events_); }
109 void start () { iom.reg (this); } 138 void start () { io_manager::reg (*this); }
110 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } 139 void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); }
111 void stop () { iom.unreg (this); } 140 void stop () { io_manager::unreg (*this); }
112};
113#endif
114 141
115#if IOM_TIME 142 template<class O1, class O2>
116enum { TSTAMP_CANCEL = -1 }; 143 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
144 : callback2<void, io_watcher &, short> (object,method)
145 { }
146 ~io_watcher () { stop (); }
147};
148#endif
117 149
150#if IOM_TIME
118struct time_watcher : callback1<void, time_watcher &> { 151struct time_watcher : watcher, callback1<void, time_watcher &> {
119 tstamp at; 152 tstamp at;
120 153
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 (); 154 void trigger ();
129 155
130 void set (tstamp when) { at = when; } 156 void set (tstamp when) { at = when; }
131 void operator ()() { trigger (); } 157 void operator () () { trigger (); }
132 void start () { iom.reg (this); } 158 void start () { io_manager::reg (*this); }
133 void start (tstamp when) { set (when); iom.reg (this); } 159 void start (tstamp when) { set (when); io_manager::reg (*this); }
134 void stop () { iom.unreg (this); } 160 void stop () { io_manager::unreg (*this); }
135 161
136 void reset (tstamp when = TSTAMP_CANCEL) 162 template<class O1, class O2>
137 { 163 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
138 stop (); 164 : callback1<void, time_watcher &> (object,method), at (0)
139 at = when;
140 } 165 { }
166 ~time_watcher () { stop (); }
141}; 167};
142#endif 168#endif
143 169
144#if IOM_CHECK 170#if IOM_CHECK
145// run before checking for new events 171// run before checking for new events
146struct check_watcher : callback1<void, check_watcher &> { 172struct check_watcher : watcher, callback1<void, check_watcher &> {
173 void start () { io_manager::reg (*this); }
174 void stop () { io_manager::unreg (*this); }
175
147 template<class O1, class O2> 176 template<class O1, class O2>
148 check_watcher (O1 *object, void (O2::*method)(check_watcher &)) 177 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
149 : callback1<void, check_watcher &>(object,method) 178 : callback1<void, check_watcher &> (object,method)
150 { } 179 { }
151
152 ~check_watcher (); 180 ~check_watcher () { stop (); }
153
154 void start () { iom.reg (this); }
155 void stop () { iom.unreg (this); }
156}; 181};
157#endif 182#endif
158 183
159#if IOM_IDLE 184#if IOM_IDLE
160// run after checking for any i/o, but before waiting 185// run after checking for any i/o, but before waiting
161struct idle_watcher : callback1<void, idle_watcher &> { 186struct idle_watcher : watcher, callback1<void, idle_watcher &> {
187 void start () { io_manager::reg (*this); }
188 void stop () { io_manager::unreg (*this); }
189
162 template<class O1, class O2> 190 template<class O1, class O2>
163 idle_watcher (O1 *object, void (O2::*method)(idle_watcher &)) 191 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
164 : callback1<void, idle_watcher &>(object,method) 192 : callback1<void, idle_watcher &> (object,method)
165 { } 193 { }
166
167 ~idle_watcher (); 194 ~idle_watcher () { stop (); }
195};
196#endif
168 197
169 void start () { iom.reg (this); } 198#if IOM_SIG
199struct sig_watcher : watcher, callback1<void, sig_watcher &> {
200 int signum;
201
202 void start (int signum);
170 void stop () { iom.unreg (this); } 203 void stop () { io_manager::unreg (*this); }
171};
172#endif
173 204
205 template<class O1, class O2>
206 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
207 : callback1<void, sig_watcher &> (object,method), signum (-1)
208 { }
209 ~sig_watcher () { stop (); }
210};
174#endif 211#endif
175 212
213#endif
214

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