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Comparing rxvt-unicode/src/iom.h (file contents):
Revision 1.6 by pcg, Fri Jan 16 22:11:09 2004 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 "callback.h" 31#include "callback.h"
26#include "rxvtvec.h"
27 32
28#ifndef IOM_IO 33#ifndef IOM_IO
29# define IOM_IO 1 34# define IOM_IO 0
30#endif 35#endif
31#ifndef IOM_TIME 36#ifndef IOM_TIME
32# define IOM_TIME 1 37# define IOM_TIME 0
33#endif 38#endif
34#ifndef IOM_CHECK 39#ifndef IOM_CHECK
35# define IOM_CHECK 1 40# define IOM_CHECK 0
36#endif 41#endif
37#ifndef IOM_IDLE 42#ifndef IOM_IDLE
38# define IOM_IDLE 0 43# define IOM_IDLE 0
39#endif 44#endif
45#ifndef IOM_SIG
46# define IOM_SIG 0
47#endif
40 48
41typedef double tstamp; 49typedef double tstamp;
42extern tstamp NOW; 50extern tstamp NOW;
43 51
52// TSTAMP_MAX must still fit into a positive struct timeval
53#define TSTAMP_MAX (double)(1UL<<31)
54
55struct watcher;
44#if IOM_IO 56#if IOM_IO
45 struct io_watcher; 57struct io_watcher;
46#endif 58#endif
47#if IOM_TIME 59#if IOM_TIME
48 struct time_watcher; 60struct time_watcher;
49#endif 61#endif
50#if IOM_CHECK 62#if IOM_CHECK
51 struct check_watcher; 63struct check_watcher;
52#endif 64#endif
53#if IOM_IDLE 65#if IOM_IDLE
54 struct idle_watcher; 66struct idle_watcher;
67#endif
68#if IOM_SIG
69struct sig_watcher;
55#endif 70#endif
56 71
57template<class watcher> 72template<class watcher>
58struct io_manager_vec : protected simplevec<watcher *> { 73struct io_manager_vec : vector<watcher *> {
59 friend class io_manager;
60protected:
61 void erase_unordered (unsigned int pos) 74 void erase_unordered (unsigned int pos)
62 { 75 {
63 watcher *w = (*this)[size () - 1]; 76 watcher *w = (*this)[this->size () - 1];
64 pop_back (); 77 this->pop_back ();
65 78
66 if (size ()) 79 if (!this->empty ())
67 if ((*this)[pos] = w) 80 if (((*this)[pos] = w)) // '=' is correct!
68 w->active = pos + 1; 81 w->active = pos + 1;
69 } 82 }
70}; 83};
71 84
85// only used as a namespace, and for initialisation purposes
72class io_manager { 86class io_manager {
73#if IOM_IO
74 io_manager_vec<io_watcher> iow;
75#endif
76#if IOM_CHECK
77 io_manager_vec<check_watcher> cw;
78#endif
79#if IOM_TIME
80 io_manager_vec<time_watcher> tw;
81#endif
82#if IOM_IDLE
83 io_manager_vec<idle_watcher> iw;
84#endif
85
86 template<class watcher> 87 template<class watcher>
87 void reg (watcher *w, simplevec<watcher *> &queue); 88 static void reg (watcher &w, io_manager_vec<watcher> &queue);
88 89
89 template<class watcher> 90 template<class watcher>
90 void unreg (watcher *w, simplevec<watcher *> &queue); 91 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
91 92
92public: 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
93 // register a watcher 102 // register a watcher
94#if IOM_IO 103#if IOM_IO
95 void reg (io_watcher *w); void unreg (io_watcher *w); 104 static void reg (io_watcher &w); static void unreg (io_watcher &w);
96#endif 105#endif
97#if IOM_TIME 106#if IOM_TIME
98 void reg (time_watcher *w); void unreg (time_watcher *w); 107 static void reg (time_watcher &w); static void unreg (time_watcher &w);
99#endif 108#endif
100#if IOM_CHECK 109#if IOM_CHECK
101 void reg (check_watcher *w); void unreg (check_watcher *w); 110 static void reg (check_watcher &w); static void unreg (check_watcher &w);
102#endif 111#endif
103#if IOM_IDLE 112#if IOM_IDLE
104 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);
105#endif 117#endif
106 118
107 void loop (); 119 static void loop ();
108
109 io_manager ();
110 ~io_manager ();
111}; 120};
112
113extern io_manager iom; // a singleton, together with it's construction/destruction problems.
114 121
115struct watcher { 122struct watcher {
116 int active; /* 0 == inactive, else index into respective vector */ 123 int active; /* 0 == inactive, else index into respective vector */
117 124
118 watcher() : active(0) { } 125 watcher () : active (0) { }
119}; 126};
120 127
121#if IOM_IO 128#if IOM_IO
122enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 129enum { EVENT_READ = 1, EVENT_WRITE = 2 };
123 130
… …
126 short events; 133 short events;
127 134
128 void set (int fd_, short events_) { fd = fd_; events = events_; } 135 void set (int fd_, short events_) { fd = fd_; events = events_; }
129 136
130 void set (short events_) { set (fd, events_); } 137 void set (short events_) { set (fd, events_); }
131 void start () { iom.reg (this); } 138 void start () { io_manager::reg (*this); }
132 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); }
133 void stop () { iom.unreg (this); } 140 void stop () { io_manager::unreg (*this); }
134 141
135 template<class O1, class O2> 142 template<class O1, class O2>
136 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 143 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
137 : callback2<void, io_watcher &, short>(object,method) 144 : callback2<void, io_watcher &, short> (object,method)
138 { } 145 { }
139 ~io_watcher () { stop (); } 146 ~io_watcher () { stop (); }
140}; 147};
141#endif 148#endif
142 149
… …
145 tstamp at; 152 tstamp at;
146 153
147 void trigger (); 154 void trigger ();
148 155
149 void set (tstamp when) { at = when; } 156 void set (tstamp when) { at = when; }
150 void operator ()() { trigger (); } 157 void operator () () { trigger (); }
151 void start () { iom.reg (this); } 158 void start () { io_manager::reg (*this); }
152 void start (tstamp when) { set (when); iom.reg (this); } 159 void start (tstamp when) { set (when); io_manager::reg (*this); }
153 void stop () { iom.unreg (this); } 160 void stop () { io_manager::unreg (*this); }
154 161
155 template<class O1, class O2> 162 template<class O1, class O2>
156 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 163 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
157 : callback1<void, time_watcher &>(object,method) 164 : callback1<void, time_watcher &> (object,method), at (0)
158 { } 165 { }
159 ~time_watcher () { stop (); } 166 ~time_watcher () { stop (); }
160}; 167};
161#endif 168#endif
162 169
163#if IOM_CHECK 170#if IOM_CHECK
164// run before checking for new events 171// run before checking for new events
165struct check_watcher : watcher, callback1<void, check_watcher &> { 172struct check_watcher : watcher, callback1<void, check_watcher &> {
166 void start () { iom.reg (this); } 173 void start () { io_manager::reg (*this); }
167 void stop () { iom.unreg (this); } 174 void stop () { io_manager::unreg (*this); }
168 175
169 template<class O1, class O2> 176 template<class O1, class O2>
170 check_watcher (O1 *object, void (O2::*method)(check_watcher &)) 177 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
171 : callback1<void, check_watcher &>(object,method) 178 : callback1<void, check_watcher &> (object,method)
172 { } 179 { }
173 ~check_watcher () { stop (); } 180 ~check_watcher () { stop (); }
174}; 181};
175#endif 182#endif
176 183
177#if IOM_IDLE 184#if IOM_IDLE
178// run after checking for any i/o, but before waiting 185// run after checking for any i/o, but before waiting
179struct idle_watcher : watcher, callback1<void, idle_watcher &> { 186struct idle_watcher : watcher, callback1<void, idle_watcher &> {
180 void start () { iom.reg (this); } 187 void start () { io_manager::reg (*this); }
181 void stop () { iom.unreg (this); } 188 void stop () { io_manager::unreg (*this); }
182 189
183 template<class O1, class O2> 190 template<class O1, class O2>
184 idle_watcher (O1 *object, void (O2::*method)(idle_watcher &)) 191 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
185 : callback1<void, idle_watcher &>(object,method) 192 : callback1<void, idle_watcher &> (object,method)
186 { } 193 { }
187 ~idle_watcher () { stop (); } 194 ~idle_watcher () { stop (); }
188}; 195};
189#endif 196#endif
190 197
191#endif 198#if IOM_SIG
199struct sig_watcher : watcher, callback1<void, sig_watcher &> {
200 int signum;
192 201
202 void start (int signum);
203 void stop () { io_manager::unreg (*this); }
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};
211#endif
212
213#endif
214

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