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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 1.25 by root, Thu Jan 19 09:47:15 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, 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" 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 watcher () : active (0) { }
121};
83 122
84#if IOM_IO 123#if IOM_IO
85enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 124enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = 1, EVENT_WRITE = 2 };
86 125
87struct io_watcher : callback2<void, io_watcher &, short> { 126struct io_watcher : watcher, callback2<void, io_watcher &, short> {
88 int fd; 127 int fd;
89 short events; 128 short events;
90 129
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_; } 130 void set (int fd_, short events_) { fd = fd_; events = events_; }
99 131
100 void set(short events_) { set (fd, events_); } 132 void set (short events_) { set (fd, events_); }
133 void start () { io_manager::reg (*this); }
101 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } 134 void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); }
102 void stop () { iom.unreg (this); } 135 void stop () { io_manager::unreg (*this); }
103};
104#endif
105 136
106#if IOM_TIME 137 template<class O1, class O2>
107enum { TSTAMP_CANCEL = -1 }; 138 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
139 : callback2<void, io_watcher &, short> (object, method)
140 { }
141 ~io_watcher () { stop (); }
142};
143#endif
108 144
145#if IOM_TIME
109struct time_watcher : callback1<void, time_watcher &> { 146struct time_watcher : watcher, callback1<void, time_watcher &> {
110 tstamp at; 147 tstamp at;
111 148
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 (); 149 void trigger ();
120 150
121 void set (tstamp when) { at = when; } 151 void set (tstamp when) { at = when; }
122 void operator ()() { trigger (); } 152 void operator () () { trigger (); }
123 void start () { iom.reg (this); } 153 void start () { io_manager::reg (*this); }
124 void start (tstamp when) { set (when); iom.reg (this); } 154 void start (tstamp when) { set (when); io_manager::reg (*this); }
125 void stop () { iom.unreg (this); } 155 void stop () { io_manager::unreg (*this); }
126 156
127 void reset (tstamp when = TSTAMP_CANCEL) 157 template<class O1, class O2>
128 { 158 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
129 stop (); 159 : callback1<void, time_watcher &> (object, method), at (0)
130 at = when;
131 } 160 { }
161 ~time_watcher () { stop (); }
132}; 162};
133#endif 163#endif
134 164
135#if IOM_CHECK 165#if IOM_CHECK
136// run before checking for new events 166// run before checking for new events
137struct check_watcher : callback1<void, check_watcher &> { 167struct check_watcher : watcher, callback1<void, check_watcher &> {
168 void start () { io_manager::reg (*this); }
169 void stop () { io_manager::unreg (*this); }
170
138 template<class O1, class O2> 171 template<class O1, class O2>
139 check_watcher (O1 *object, void (O2::*method)(check_watcher &)) 172 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
140 : callback1<void, check_watcher &>(object,method) 173 : callback1<void, check_watcher &> (object, method)
174 { }
175 ~check_watcher () { stop (); }
176};
177#endif
178
179#if IOM_IDLE
180// run after checking for any i/o, but before waiting
181struct idle_watcher : watcher, callback1<void, idle_watcher &> {
182 void start () { io_manager::reg (*this); }
183 void stop () { io_manager::unreg (*this); }
184
185 template<class O1, class O2>
186 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
187 : callback1<void, idle_watcher &> (object, method)
141 { } 188 { }
189 ~idle_watcher () { stop (); }
190};
191#endif
142 192
143 ~check_watcher (); 193#if IOM_SIG
194struct sig_watcher : watcher, callback1<void, sig_watcher &> {
195 int signum;
144 196
145 void start () { iom.reg (this); } 197 void start (int signum);
146 void stop () { iom.unreg (this); } 198 void stop () { io_manager::unreg (*this); }
147};
148#endif
149 199
200 template<class O1, class O2>
201 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
202 : callback1<void, sig_watcher &> (object, method), signum (0)
203 { }
204 ~sig_watcher () { stop (); }
205};
150#endif 206#endif
151 207
208#if IOM_CHILD
209struct child_watcher : watcher, callback2<void, child_watcher &, int> {
210 int /*pid_t*/ pid;
211
212 void start (int pid) { this->pid = pid; io_manager::reg (*this); }
213 void stop () { io_manager::unreg (*this); }
214
215 template<class O1, class O2>
216 child_watcher (O1 *object, void (O2::*method) (child_watcher &, int status))
217 : callback2<void, child_watcher &, int> (object, method), pid (0)
218 { }
219 ~child_watcher () { stop (); }
220};
221#endif
222
223#endif
224

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