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Comparing rxvt-unicode/src/iom.h (file contents):
Revision 1.2 by pcg, Wed Nov 26 10:42:34 2003 UTC vs.
Revision 1.28 by root, Wed May 31 00:32:56 2006 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) 2003-2006 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" 31#if IOM_CHILD
32# undef IOM_SIG
33# define IOM_SIG 1
34#endif
35
26#include "callback.h" 36#include "callback.h"
27 37
28#define IOM_IO 1 38typedef double tstamp;
29#define IOM_TIME 1 39extern tstamp NOW;
30#undef IOM_CHECK
31 40
41// TSTAMP_MAX must still fit into a positive struct timeval
42#define TSTAMP_MAX (double)(1UL<<31)
43
44struct watcher;
32#if IOM_IO 45#if IOM_IO
33 typedef double tstamp;
34 extern tstamp NOW;
35
36 struct io_watcher; 46struct io_watcher;
37#endif 47#endif
38#if IOM_TIME 48#if IOM_TIME
39 struct time_watcher; 49struct time_watcher;
40#endif 50#endif
41#if IOM_CHECK 51#if IOM_CHECK
42 struct check_watcher; 52struct check_watcher;
43#endif 53#endif
54#if IOM_IDLE
55struct idle_watcher;
56#endif
57#if IOM_SIG
58struct sig_watcher;
59#endif
60#if IOM_CHILD
61struct child_watcher;
62#endif
44 63
64template<class watcher>
65struct io_manager_vec : vector<watcher *> {
66 void erase_unordered (unsigned int pos)
67 {
68 watcher *w = (*this)[this->size () - 1];
69 this->pop_back ();
70
71 if (!this->empty ())
72 if (((*this)[pos] = w)) // '=' is correct!
73 w->active = pos + 1;
74 }
75};
76
77// only used as a namespace, and for initialisation purposes
45class io_manager { 78class 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
55 void idle_cb (time_watcher &w); time_watcher *idle;
56#endif
57
58 template<class watcher> 79 template<class watcher>
59 void reg (watcher *w, simplevec<watcher *> &queue); 80 static void reg (watcher &w, io_manager_vec<watcher> &queue);
60 81
61 template<class watcher> 82 template<class watcher>
62 void unreg (watcher *w, simplevec<watcher *> &queue); 83 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
63 84
64public: 85public:
86#if IOM_TIME
87 // fetch time only
88 static tstamp now ();
89
90 // set NOW
91 static void set_now ();
92#endif
93
65 // register a watcher 94 // register a watcher
66#if IOM_IO 95#if IOM_IO
67 void reg (io_watcher *w); void unreg (io_watcher *w); 96 static void reg (io_watcher &w); static void unreg (io_watcher &w);
68#endif 97#endif
69#if IOM_TIME 98#if IOM_TIME
70 void reg (time_watcher *w); void unreg (time_watcher *w); 99 static void reg (time_watcher &w); static void unreg (time_watcher &w);
71#endif 100#endif
72#if IOM_CHECK 101#if IOM_CHECK
73 void reg (check_watcher *w); void unreg (check_watcher *w); 102 static void reg (check_watcher &w); static void unreg (check_watcher &w);
103#endif
104#if IOM_IDLE
105 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
106#endif
107#if IOM_SIG
108 static void reg (sig_watcher &w); static void unreg (sig_watcher &w);
109#endif
110#if IOM_CHILD
111 static void reg (child_watcher &w); static void unreg (child_watcher &w);
74#endif 112#endif
75 113
76 void loop (); 114 static void loop ();
77
78 io_manager ();
79 ~io_manager ();
80}; 115};
81 116
82extern io_manager iom; // a singleton, together with it's construction/destruction problems. 117struct watcher {
118 int active; /* 0 == inactive, else index into respective vector */
119
120 bool is_active () { return active; }
121
122 watcher () : active (0) { }
123};
83 124
84#if IOM_IO 125#if IOM_IO
85enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 126enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = 1, EVENT_WRITE = 2 };
86 127
87struct io_watcher : callback2<void, io_watcher &, short> { 128struct io_watcher : watcher, callback<void (io_watcher &, short)> {
88 int fd; 129 int fd;
89 short events; 130 short events;
90 131
91 template<class O1, class O2>
92 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short))
93 : callback2<void, io_watcher &, short>(object,method)
94 { }
95
96 ~io_watcher ();
97
98 void set(int fd_, short events_) { fd = fd_; events = events_; } 132 void set (int fd_, short events_) { fd = fd_; events = events_; }
99 133
100 void set(short events_) { set (fd, events_); } 134 void set (short events_) { set (fd, events_); }
135 void start () { io_manager::reg (*this); }
101 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } 136 void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); }
102 void stop () { iom.unreg (this); } 137 void stop () { io_manager::unreg (*this); }
103};
104#endif
105 138
106#if IOM_TIME 139 template<class O1, class O2>
107enum { TSTAMP_CANCEL = -1 }; 140 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
141 : callback<void (io_watcher &, short)> (object, method)
142 { }
143 ~io_watcher () { stop (); }
144};
145#endif
108 146
147#if IOM_TIME
109struct time_watcher : callback1<void, time_watcher &> { 148struct time_watcher : watcher, callback<void (time_watcher &)> {
110 tstamp at; 149 tstamp at;
111 150
112 template<class O1, class O2>
113 time_watcher (O1 *object, void (O2::*method)(time_watcher &))
114 : callback1<void, time_watcher &>(object,method)
115 { }
116
117 ~time_watcher ();
118
119 void trigger (); 151 void trigger ();
120 152
121 void set (tstamp when) { at = when; } 153 void set (tstamp when) { at = when; }
122 void operator ()() { trigger (); } 154 void operator () () { trigger (); }
123 void start () { iom.reg (this); } 155 void start () { io_manager::reg (*this); }
124 void start (tstamp when) { set (when); iom.reg (this); } 156 void start (tstamp when) { set (when); io_manager::reg (*this); }
125 void stop () { iom.unreg (this); } 157 void stop () { io_manager::unreg (*this); }
126 158
127 void reset (tstamp when = TSTAMP_CANCEL) 159 template<class O1, class O2>
128 { 160 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
129 stop (); 161 : callback<void (time_watcher &)> (object, method), at (0)
130 at = when;
131 } 162 { }
163 ~time_watcher () { stop (); }
132}; 164};
133#endif 165#endif
134 166
135#if IOM_CHECK 167#if IOM_CHECK
136// run before checking for new events 168// run before checking for new events
137struct check_watcher : callback1<void, check_watcher &> { 169struct check_watcher : watcher, callback<void (check_watcher &)> {
170 void start () { io_manager::reg (*this); }
171 void stop () { io_manager::unreg (*this); }
172
138 template<class O1, class O2> 173 template<class O1, class O2>
139 check_watcher (O1 *object, void (O2::*method)(check_watcher &)) 174 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
140 : callback1<void, check_watcher &>(object,method) 175 : callback<void (check_watcher &)> (object, method)
176 { }
177 ~check_watcher () { stop (); }
178};
179#endif
180
181#if IOM_IDLE
182// run after checking for any i/o, but before waiting
183struct idle_watcher : watcher, callback<void (idle_watcher &)> {
184 void start () { io_manager::reg (*this); }
185 void stop () { io_manager::unreg (*this); }
186
187 template<class O1, class O2>
188 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
189 : callback<void (idle_watcher &)> (object, method)
141 { } 190 { }
191 ~idle_watcher () { stop (); }
192};
193#endif
142 194
143 ~check_watcher (); 195#if IOM_SIG
196struct sig_watcher : watcher, callback<void (sig_watcher &)> {
197 int signum;
144 198
145 void start () { iom.reg (this); } 199 void start (int signum);
146 void stop () { iom.unreg (this); } 200 void stop () { io_manager::unreg (*this); }
147};
148#endif
149 201
202 template<class O1, class O2>
203 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
204 : callback<void(sig_watcher &)> (object, method), signum (0)
205 { }
206 ~sig_watcher () { stop (); }
207};
150#endif 208#endif
151 209
210#if IOM_CHILD
211struct child_watcher : watcher, callback<void (child_watcher &, int)> {
212 int /*pid_t*/ pid;
213
214 void start (int pid) { this->pid = pid; io_manager::reg (*this); }
215 void stop () { io_manager::unreg (*this); }
216
217 template<class O1, class O2>
218 child_watcher (O1 *object, void (O2::*method) (child_watcher &, int status))
219 : callback<void (child_watcher &, int)> (object, method), pid (0)
220 { }
221 ~child_watcher () { stop (); }
222};
223#endif
224
225#endif
226

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