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Comparing rxvt-unicode/src/iom.h (file contents):
Revision 1.1 by pcg, Mon Nov 24 17:28:08 2003 UTC vs.
Revision 1.30 by root, Thu Oct 25 10:44:14 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#endif
51
52struct watcher;
53#if IOM_IO
32struct io_watcher; 54struct io_watcher;
55#endif
56#if IOM_TIME
33struct time_watcher; 57struct time_watcher;
58#endif
59#if IOM_CHECK
60struct check_watcher;
61#endif
62#if IOM_IDLE
63struct idle_watcher;
64#endif
65#if IOM_SIG
66struct sig_watcher;
67#endif
68#if IOM_CHILD
69struct child_watcher;
70#endif
34 71
72template<class watcher>
73struct io_manager_vec : vector<watcher *> {
74 void erase_unordered (unsigned int pos)
75 {
76 watcher *w = (*this)[this->size () - 1];
77 this->pop_back ();
78
79 if (!this->empty ())
80 if (((*this)[pos] = w)) // '=' is correct!
81 w->active = pos + 1;
82 }
83};
84
85// only used as a namespace, and for initialisation purposes
35class io_manager { 86class io_manager {
36 simplevec<io_watcher *> iow; 87 template<class watcher>
37 simplevec<time_watcher *> tw; // actually a heap 88 static void reg (watcher &w, io_manager_vec<watcher> &queue);
38 89
39 void idle_cb (time_watcher &w); time_watcher *idle; 90 template<class watcher>
91 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
92
40public: 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
41 // register a watcher 102 // register a watcher
42 void reg (io_watcher *w); 103#ifndef IOM_LIBEVENT
43 void unreg (io_watcher *w); 104#if IOM_IO
44 void reg (time_watcher *w); 105 static void reg (io_watcher &w); static void unreg (io_watcher &w);
45 void unreg (time_watcher *w); 106#endif
107#if IOM_TIME
108 static void reg (time_watcher &w); static void unreg (time_watcher &w);
109#endif
110#if IOM_SIG
111 static void reg (sig_watcher &w); static void unreg (sig_watcher &w);
112#endif
113#if IOM_CHECK
114 static void reg (check_watcher &w); static void unreg (check_watcher &w);
115#endif
116#endif
117#if IOM_IDLE
118 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
119#endif
120#if IOM_CHILD
121 static void reg (child_watcher &w); static void unreg (child_watcher &w);
122#endif
46 123
47 void loop (); 124 static void loop ();
48
49 io_manager ();
50 ~io_manager ();
51}; 125};
52 126
53extern io_manager iom; // a singleton, together with it's construction/destruction problems. 127struct watcher {
128 int active; /* 0 == inactive, else index into respective vector */
54 129
55enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 130 bool is_active () { return active; }
56 131
132 watcher () : active (0) { }
133};
134
135#if IOM_IO
136#ifdef IOM_LIBEVENT
137enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = EV_READ, EVENT_WRITE = EV_WRITE };
138
139void iom_io_c_callback (int fd, short events, void *data);
140
57struct io_watcher : callback2<void, io_watcher &, short> { 141struct io_watcher : watcher, callback<void (io_watcher &, short)> {
142 struct event ev;
143 int fd;
144
145 void set (int fd_, short events_) { fd = fd_; event_set (&ev, fd_, events_, iom_io_c_callback, (void *)this); }
146
147 void set (short events_) { set (fd, events_); }
148 void start () { event_add (&ev, 0); active = 1; }
149 void start (int fd_, short events_) { set (fd_, events_); start (); }
150 void stop () { if (active) event_del (&ev); active = 0; }
151
152 template<class O, class M>
153 io_watcher (O object, M method)
154 : callback<void (io_watcher &, short)> (object, method)
155 { }
156 ~io_watcher () { stop (); }
157};
158#else
159enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = 1, EVENT_WRITE = 2 };
160
161struct io_watcher : watcher, callback<void (io_watcher &, short)> {
58 int fd; 162 int fd;
59 short events; 163 short events;
60 164
165 void set (int fd_, short events_) { fd = fd_; events = events_; }
166
167 void set (short events_) { set (fd, events_); }
168 void start () { io_manager::reg (*this); }
169 void start (int fd_, short events_) { set (fd_, events_); start (); }
170 void stop () { io_manager::unreg (*this); }
171
61 template<class O1, class O2> 172 template<class O, class M>
62 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 173 io_watcher (O object, M method)
63 : callback2<void, io_watcher &, short>(object,method) 174 : callback<void (io_watcher &, short)> (object, method)
175 { }
176 ~io_watcher () { stop (); }
177};
178#endif
179#endif
180
181#if IOM_TIME
182#ifdef IOM_LIBEVENT
183void iom_time_c_callback (int fd, short events, void *data);
184
185struct time_watcher : watcher, callback<void (time_watcher &)> {
186 struct event ev;
187 tstamp at;
188
189 void trigger ();
190
191 void set (tstamp when) { at = when; }
192 void operator () () { trigger (); }
193 void start ()
194 {
195 struct timeval tv;
196 tv.tv_sec = (long)at;
197 tv.tv_usec = (long)((at - (tstamp)tv.tv_sec) * 1000000.);
198 evtimer_add (&ev, &tv);
199 active = 1;
200 }
201 void start (tstamp when) { set (when); start (); }
202 void stop () { if (active) evtimer_del (&ev); active = 0; }
203
204 template<class O, class M>
205 time_watcher (O object, M method)
206 : callback<void (time_watcher &)> (object, method), at (0)
207 {
208 evtimer_set (&ev, iom_time_c_callback, (void *)this);
209 }
210 ~time_watcher () { stop (); }
211};
212#else
213struct time_watcher : watcher, callback<void (time_watcher &)> {
214 tstamp at;
215
216 void trigger ();
217
218 void set (tstamp when) { at = when; }
219 void operator () () { trigger (); }
220 void start () { io_manager::reg (*this); }
221 void start (tstamp when) { set (when); start (); }
222 void stop () { io_manager::unreg (*this); }
223
224 template<class O, class M>
225 time_watcher (O object, M method)
226 : callback<void (time_watcher &)> (object, method), at (0)
227 { }
228 ~time_watcher () { stop (); }
229};
230#endif
231#endif
232
233#if IOM_CHECK
234// run before checking for new events
235struct check_watcher : watcher, callback<void (check_watcher &)> {
236 void start () { io_manager::reg (*this); }
237 void stop () { io_manager::unreg (*this); }
238
239 template<class O, class M>
240 check_watcher (O object, M method)
241 : callback<void (check_watcher &)> (object, method)
242 { }
243 ~check_watcher () { stop (); }
244};
245#endif
246
247#if IOM_IDLE
248// run after checking for any i/o, but before waiting
249struct idle_watcher : watcher, callback<void (idle_watcher &)> {
250 void start () { io_manager::reg (*this); }
251 void stop () { io_manager::unreg (*this); }
252
253 template<class O, class M>
254 idle_watcher (O object, M method)
255 : callback<void (idle_watcher &)> (object, method)
64 { } 256 { }
257 ~idle_watcher () { stop (); }
258};
259#endif
65 260
66 ~io_watcher (); 261#if IOM_SIG
262struct sig_watcher : watcher, callback<void (sig_watcher &)> {
263 int signum;
67 264
68 void set(int fd_, short events_) { fd = fd_; events = events_; } 265 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); } 266 void stop () { io_manager::unreg (*this); }
73};
74 267
75#define TSTAMP_CANCEL -1.
76
77struct time_watcher : callback1<void, time_watcher &> {
78 tstamp at;
79
80 template<class O1, class O2> 268 template<class O, class M>
81 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 269 sig_watcher (O object, M method)
82 : callback1<void, time_watcher &>(object,method) 270 : callback<void(sig_watcher &)> (object, method), signum (0)
83 { } 271 { }
272 ~sig_watcher () { stop (); }
273};
274#endif
84 275
85 ~time_watcher (); 276#if IOM_CHILD
277struct child_watcher : watcher, callback<void (child_watcher &, int)> {
278 int /*pid_t*/ pid;
86 279
87 void trigger (); 280 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); } 281 void stop () { io_manager::unreg (*this); }
94 282
95 void reset (tstamp when = TSTAMP_CANCEL) 283 template<class O, class M>
96 { 284 child_watcher (O object, M method)
97 stop (); 285 : callback<void (child_watcher &, int)> (object, method), pid (0)
98 at = when;
99 } 286 { }
287 ~child_watcher () { stop (); }
100}; 288};
101
102#endif 289#endif
103 290
291#endif
292

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