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Comparing cvsroot/rxvt-unicode/src/iom.h (file contents):
Revision 1.1 by pcg, Mon Nov 24 17:28:08 2003 UTC vs.
Revision 1.31 by root, Thu Oct 25 12:42:00 2007 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
44//#define IOM_LIBEVENT "event.h" *NOT* a supported feature
45#ifdef IOM_LIBEVENT
46# include <sys/time.h>
47# include IOM_LIBEVENT
48# undef IOM_IO
49# define IOM_IO 1
50# undef IOM_TIME
51# define IOM_TIME 1
52# undef IOM_IDLE // NYI
53# undef IOM_SIG // NYI
54# undef IOM_CHILD // NYI
55#endif
56
57struct watcher;
58#if IOM_IO
32struct io_watcher; 59struct io_watcher;
60#endif
61#if IOM_TIME
33struct time_watcher; 62struct time_watcher;
63#endif
64#if IOM_CHECK
65struct check_watcher;
66#endif
67#if IOM_IDLE
68struct idle_watcher;
69#endif
70#if IOM_SIG
71struct sig_watcher;
72#endif
73#if IOM_CHILD
74struct child_watcher;
75#endif
34 76
77template<class watcher>
78struct io_manager_vec : vector<watcher *> {
79 void erase_unordered (unsigned int pos)
80 {
81 watcher *w = (*this)[this->size () - 1];
82 this->pop_back ();
83
84 if (!this->empty ())
85 if (((*this)[pos] = w)) // '=' is correct!
86 w->active = pos + 1;
87 }
88};
89
90// only used as a namespace, and for initialisation purposes
35class io_manager { 91class io_manager {
36 simplevec<io_watcher *> iow; 92 template<class watcher>
37 simplevec<time_watcher *> tw; // actually a heap 93 static void reg (watcher &w, io_manager_vec<watcher> &queue);
38 94
39 void idle_cb (time_watcher &w); time_watcher *idle; 95 template<class watcher>
96 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
97
40public: 98public:
99#if IOM_TIME
100 // fetch time only
101 static tstamp now ();
102
103 // set NOW
104 static void set_now ();
105#endif
106
41 // register a watcher 107 // register a watcher
42 void reg (io_watcher *w); 108#ifndef IOM_LIBEVENT
43 void unreg (io_watcher *w); 109#if IOM_IO
44 void reg (time_watcher *w); 110 static void reg (io_watcher &w); static void unreg (io_watcher &w);
45 void unreg (time_watcher *w); 111#endif
112#if IOM_TIME
113 static void reg (time_watcher &w); static void unreg (time_watcher &w);
114#endif
115#if IOM_SIG
116 static void reg (sig_watcher &w); static void unreg (sig_watcher &w);
117#endif
118#if IOM_CHECK
119 static void reg (check_watcher &w); static void unreg (check_watcher &w);
120#endif
121#endif
122#if IOM_IDLE
123 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
124#endif
125#if IOM_CHILD
126 static void reg (child_watcher &w); static void unreg (child_watcher &w);
127#endif
46 128
47 void loop (); 129 static void loop ();
48
49 io_manager ();
50 ~io_manager ();
51}; 130};
52 131
53extern io_manager iom; // a singleton, together with it's construction/destruction problems. 132struct watcher {
133 int active; /* 0 == inactive, else index into respective vector */
54 134
55enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 135 bool is_active () { return active; }
56 136
137 watcher () : active (0) { }
138};
139
140#if IOM_IO
141#ifdef IOM_LIBEVENT
142enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = EV_READ, EVENT_WRITE = EV_WRITE };
143
144void iom_io_c_callback (int fd, short events, void *data);
145
57struct io_watcher : callback2<void, io_watcher &, short> { 146struct io_watcher : watcher, callback<void (io_watcher &, short)> {
147 struct event ev;
58 int fd; 148 int fd;
59 short events; 149 short events;
60 150
151 void set (int fd_, short events_);
152 void set (short events_) { set (fd, events_); }
153 void start () { if (!active) event_add (&ev, 0); active = 1; }
154 void start (int fd_, short events_) { set (fd_, events_); start (); }
155 void stop () { if (active) event_del (&ev); active = 0; }
156
61 template<class O1, class O2> 157 template<class O, class M>
62 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 158 io_watcher (O object, M method)
63 : callback2<void, io_watcher &, short>(object,method) 159 : callback<void (io_watcher &, short)> (object, method)
160 { }
161 ~io_watcher () { stop (); }
162};
163#else
164enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = 1, EVENT_WRITE = 2 };
165
166struct io_watcher : watcher, callback<void (io_watcher &, short)> {
167 int fd;
168 short events;
169
170 void set (int fd_, short events_) { fd = fd_; events = events_; }
171
172 void set (short events_) { set (fd, events_); }
173 void start () { io_manager::reg (*this); }
174 void start (int fd_, short events_) { set (fd_, events_); start (); }
175 void stop () { io_manager::unreg (*this); }
176
177 template<class O, class M>
178 io_watcher (O object, M method)
179 : callback<void (io_watcher &, short)> (object, method)
180 { }
181 ~io_watcher () { stop (); }
182};
183#endif
184#endif
185
186#if IOM_TIME
187#ifdef IOM_LIBEVENT
188void iom_time_c_callback (int fd, short events, void *data);
189
190struct time_watcher : watcher, callback<void (time_watcher &)> {
191 struct event ev;
192 tstamp at;
193
194 void trigger ();
195
196 void set (tstamp when)
197 {
198 at = when;
199 if (active)
200 start ();
201 }
202 void operator () () { trigger (); }
203 void start ();
204 void start (tstamp when) { at = when; start (); }
205 void stop () { if (active) evtimer_del (&ev); active = 0; }
206
207 template<class O, class M>
208 time_watcher (O object, M method)
209 : callback<void (time_watcher &)> (object, method), at (0)
210 { }
211 ~time_watcher () { stop (); }
212};
213#else
214struct time_watcher : watcher, callback<void (time_watcher &)> {
215 tstamp at;
216
217 void trigger ();
218
219 void set (tstamp when) { at = when; }
220 void operator () () { trigger (); }
221 void start () { io_manager::reg (*this); }
222 void start (tstamp when) { set (when); start (); }
223 void stop () { io_manager::unreg (*this); }
224
225 template<class O, class M>
226 time_watcher (O object, M method)
227 : callback<void (time_watcher &)> (object, method), at (0)
228 { }
229 ~time_watcher () { stop (); }
230};
231#endif
232#endif
233
234#if IOM_CHECK
235// run before checking for new events
236struct check_watcher : watcher, callback<void (check_watcher &)> {
237 void start () { io_manager::reg (*this); }
238 void stop () { io_manager::unreg (*this); }
239
240 template<class O, class M>
241 check_watcher (O object, M method)
242 : callback<void (check_watcher &)> (object, method)
243 { }
244 ~check_watcher () { stop (); }
245};
246#endif
247
248#if IOM_IDLE
249// run after checking for any i/o, but before waiting
250struct idle_watcher : watcher, callback<void (idle_watcher &)> {
251 void start () { io_manager::reg (*this); }
252 void stop () { io_manager::unreg (*this); }
253
254 template<class O, class M>
255 idle_watcher (O object, M method)
256 : callback<void (idle_watcher &)> (object, method)
64 { } 257 { }
258 ~idle_watcher () { stop (); }
259};
260#endif
65 261
66 ~io_watcher (); 262#if IOM_SIG
263struct sig_watcher : watcher, callback<void (sig_watcher &)> {
264 int signum;
67 265
68 void set(int fd_, short events_) { fd = fd_; events = events_; } 266 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); } 267 void stop () { io_manager::unreg (*this); }
73};
74 268
75#define TSTAMP_CANCEL -1.
76
77struct time_watcher : callback1<void, time_watcher &> {
78 tstamp at;
79
80 template<class O1, class O2> 269 template<class O, class M>
81 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 270 sig_watcher (O object, M method)
82 : callback1<void, time_watcher &>(object,method) 271 : callback<void(sig_watcher &)> (object, method), signum (0)
83 { } 272 { }
273 ~sig_watcher () { stop (); }
274};
275#endif
84 276
85 ~time_watcher (); 277#if IOM_CHILD
278struct child_watcher : watcher, callback<void (child_watcher &, int)> {
279 int /*pid_t*/ pid;
86 280
87 void trigger (); 281 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); } 282 void stop () { io_manager::unreg (*this); }
94 283
95 void reset (tstamp when = TSTAMP_CANCEL) 284 template<class O, class M>
96 { 285 child_watcher (O object, M method)
97 stop (); 286 : callback<void (child_watcher &, int)> (object, method), pid (0)
98 at = when;
99 } 287 { }
288 ~child_watcher () { stop (); }
100}; 289};
101
102#endif 290#endif
103 291
292#endif
293

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