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 1.26 by root, Thu Jan 19 11:56:00 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
28typedef double tstamp; 38typedef double tstamp;
29
30extern tstamp NOW; 39extern tstamp NOW;
31 40
41// TSTAMP_MAX must still fit into a positive struct timeval
42#define TSTAMP_MAX (double)(1UL<<31)
43
44struct watcher;
45#if IOM_IO
32struct io_watcher; 46struct io_watcher;
47#endif
48#if IOM_TIME
33struct time_watcher; 49struct time_watcher;
50#endif
51#if IOM_CHECK
52struct check_watcher;
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
34 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
35class io_manager { 78class io_manager {
36 simplevec<io_watcher *> iow; 79 template<class watcher>
37 simplevec<time_watcher *> tw; // actually a heap 80 static void reg (watcher &w, io_manager_vec<watcher> &queue);
38 81
39 void idle_cb (time_watcher &w); time_watcher *idle; 82 template<class watcher>
83 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
84
40public: 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
41 // register a watcher 94 // register a watcher
42 void reg (io_watcher *w); 95#if IOM_IO
43 void unreg (io_watcher *w); 96 static void reg (io_watcher &w); static void unreg (io_watcher &w);
44 void reg (time_watcher *w); 97#endif
45 void unreg (time_watcher *w); 98#if IOM_TIME
99 static void reg (time_watcher &w); static void unreg (time_watcher &w);
100#endif
101#if IOM_CHECK
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);
112#endif
46 113
47 void loop (); 114 static void loop ();
48
49 io_manager ();
50 ~io_manager ();
51}; 115};
52 116
53extern io_manager iom; // a singleton, together with it's construction/destruction problems. 117struct watcher {
118 int active; /* 0 == inactive, else index into respective vector */
54 119
55enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 120 watcher () : active (0) { }
121};
56 122
123#if IOM_IO
124enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = 1, EVENT_WRITE = 2 };
125
57struct io_watcher : callback2<void, io_watcher &, short> { 126struct io_watcher : watcher, callback2<void, io_watcher &, short> {
58 int fd; 127 int fd;
59 short events; 128 short events;
60 129
130 void set (int fd_, short events_) { fd = fd_; events = events_; }
131
132 void set (short events_) { set (fd, events_); }
133 void start () { io_manager::reg (*this); }
134 void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); }
135 void stop () { io_manager::unreg (*this); }
136
61 template<class O1, class O2> 137 template<class O1, class O2>
62 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 138 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
63 : callback2<void, io_watcher &, short>(object,method) 139 : callback2<void, io_watcher &, short> (object, method)
140 { }
141 ~io_watcher () { stop (); }
142};
143#endif
144
145#if IOM_TIME
146struct time_watcher : watcher, callback1<void, time_watcher &> {
147 tstamp at;
148
149 void trigger ();
150
151 void set (tstamp when) { at = when; }
152 void operator () () { trigger (); }
153 void start () { io_manager::reg (*this); }
154 void start (tstamp when) { set (when); io_manager::reg (*this); }
155 void stop () { io_manager::unreg (*this); }
156
157 template<class O1, class O2>
158 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
159 : callback1<void, time_watcher &> (object, method), at (0)
160 { }
161 ~time_watcher () { stop (); }
162};
163#endif
164
165#if IOM_CHECK
166// run before checking for new events
167struct check_watcher : watcher, callback1<void, check_watcher &> {
168 void start () { io_manager::reg (*this); }
169 void stop () { io_manager::unreg (*this); }
170
171 template<class O1, class O2>
172 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
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)
64 { } 188 { }
189 ~idle_watcher () { stop (); }
190};
191#endif
65 192
66 ~io_watcher (); 193#if IOM_SIG
194struct sig_watcher : watcher, callback1<void, sig_watcher &> {
195 int signum;
67 196
68 void set(int fd_, short events_) { fd = fd_; events = events_; } 197 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); } 198 void stop () { io_manager::unreg (*this); }
73};
74 199
75#define TSTAMP_CANCEL -1.
76
77struct time_watcher : callback1<void, time_watcher &> {
78 tstamp at;
79
80 template<class O1, class O2> 200 template<class O1, class O2>
81 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 201 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
82 : callback1<void, time_watcher &>(object,method) 202 : callback1<void, sig_watcher &> (object, method), signum (0)
83 { } 203 { }
204 ~sig_watcher () { stop (); }
205};
206#endif
84 207
85 ~time_watcher (); 208#if IOM_CHILD
209struct child_watcher : watcher, callback2<void, child_watcher &, int> {
210 int /*pid_t*/ pid;
86 211
87 void trigger (); 212 void start (int pid) { this->pid = pid; io_manager::reg (*this); }
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); } 213 void stop () { io_manager::unreg (*this); }
94 214
95 void reset (tstamp when = TSTAMP_CANCEL) 215 template<class O1, class O2>
96 { 216 child_watcher (O1 *object, void (O2::*method) (child_watcher &, int status))
97 stop (); 217 : callback2<void, child_watcher &, int> (object, method), pid (0)
98 at = when;
99 } 218 { }
219 ~child_watcher () { stop (); }
100}; 220};
101
102#endif 221#endif
103 222
223#endif
224

Diff Legend

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