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Comparing rxvt-unicode/src/iom.h (file contents):
Revision 1.3 by pcg, Sat Nov 29 18:42:07 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
38typedef double tstamp;
39extern tstamp NOW;
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
28#define IOM_IO 1 49# define IOM_IO 1
29#define IOM_TIME 1 50#endif
30#undef IOM_CHECK
31 51
52struct watcher;
32#if IOM_IO 53#if IOM_IO
33 typedef double tstamp;
34 extern tstamp NOW;
35
36 struct io_watcher; 54struct io_watcher;
37#endif 55#endif
38#if IOM_TIME 56#if IOM_TIME
39 struct time_watcher; 57struct time_watcher;
40#endif 58#endif
41#if IOM_CHECK 59#if IOM_CHECK
42 struct check_watcher; 60struct check_watcher;
43#endif 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
44 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
45class io_manager { 86class io_manager {
87 template<class watcher>
88 static void reg (watcher &w, io_manager_vec<watcher> &queue);
89
90 template<class watcher>
91 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
92
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
102 // register a watcher
103#ifndef IOM_LIBEVENT
46#if IOM_IO 104#if IOM_IO
47 simplevec<io_watcher *> iow; 105 static void reg (io_watcher &w); static void unreg (io_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);
48#endif 112#endif
49#if IOM_CHECK 113#if IOM_CHECK
50 simplevec<check_watcher *> cw; 114 static void reg (check_watcher &w); static void unreg (check_watcher &w);
51#endif 115#endif
116#endif
52#if IOM_TIME 117#if IOM_IDLE
53 simplevec<time_watcher *> tw; 118 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
54#endif 119#endif
120#if IOM_CHILD
121 static void reg (child_watcher &w); static void unreg (child_watcher &w);
122#endif
123
124 static void loop ();
125};
55 126
56 template<class watcher> 127struct watcher {
57 void reg (watcher *w, simplevec<watcher *> &queue); 128 int active; /* 0 == inactive, else index into respective vector */
58 129
59 template<class watcher> 130 bool is_active () { return active; }
60 void unreg (watcher *w, simplevec<watcher *> &queue);
61 131
62public: 132 watcher () : active (0) { }
63 // register a watcher 133};
134
64#if IOM_IO 135#if IOM_IO
65 void reg (io_watcher *w); void unreg (io_watcher *w); 136#ifdef IOM_LIBEVENT
66#endif 137enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = EV_READ, EVENT_WRITE = EV_WRITE };
67#if IOM_TIME
68 void reg (time_watcher *w); void unreg (time_watcher *w);
69#endif
70#if IOM_CHECK
71 void reg (check_watcher *w); void unreg (check_watcher *w);
72#endif
73
74 void loop ();
75 138
76 io_manager (); 139void iom_io_c_callback (int fd, short events, void *data);
77 ~io_manager ();
78};
79 140
80extern io_manager iom; // a singleton, together with it's construction/destruction problems.
81
82#if IOM_IO
83enum { EVENT_READ = 1, EVENT_WRITE = 2 };
84
85struct 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)> {
86 int fd; 162 int fd;
87 short events; 163 short events;
88 164
89 template<class O1, class O2>
90 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short))
91 : callback2<void, io_watcher &, short>(object,method)
92 { }
93
94 ~io_watcher ();
95
96 void set(int fd_, short events_) { fd = fd_; events = events_; } 165 void set (int fd_, short events_) { fd = fd_; events = events_; }
97 166
98 void set(short events_) { set (fd, events_); } 167 void set (short events_) { set (fd, events_); }
168 void start () { io_manager::reg (*this); }
99 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } 169 void start (int fd_, short events_) { set (fd_, events_); start (); }
100 void stop () { iom.unreg (this); } 170 void stop () { io_manager::unreg (*this); }
101};
102#endif
103 171
104#if IOM_TIME 172 template<class O, class M>
105enum { TSTAMP_CANCEL = -1 }; 173 io_watcher (O object, M method)
174 : callback<void (io_watcher &, short)> (object, method)
175 { }
176 ~io_watcher () { stop (); }
177};
178#endif
179#endif
106 180
181#if IOM_TIME
182#ifdef IOM_LIBEVENT
183void iom_time_c_callback (int fd, short events, void *data);
184
107struct time_watcher : callback1<void, time_watcher &> { 185struct time_watcher : watcher, callback<void (time_watcher &)> {
186 struct event ev;
108 tstamp at; 187 tstamp at;
109 188
110 template<class O1, class O2>
111 time_watcher (O1 *object, void (O2::*method)(time_watcher &))
112 : callback1<void, time_watcher &>(object,method)
113 { }
114
115 ~time_watcher ();
116
117 void trigger (); 189 void trigger ();
118 190
119 void set (tstamp when) { at = when; } 191 void set (tstamp when) { at = when; }
120 void operator ()() { trigger (); } 192 void operator () () { trigger (); }
121 void start () { iom.reg (this); } 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 }
122 void start (tstamp when) { set (when); iom.reg (this); } 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 (); }
123 void stop () { iom.unreg (this); } 222 void stop () { io_manager::unreg (*this); }
124 223
125 void reset (tstamp when = TSTAMP_CANCEL) 224 template<class O, class M>
126 { 225 time_watcher (O object, M method)
127 stop (); 226 : callback<void (time_watcher &)> (object, method), at (0)
128 at = when;
129 } 227 { }
228 ~time_watcher () { stop (); }
130}; 229};
230#endif
131#endif 231#endif
132 232
133#if IOM_CHECK 233#if IOM_CHECK
134// run before checking for new events 234// run before checking for new events
135struct check_watcher : callback1<void, check_watcher &> { 235struct check_watcher : watcher, callback<void (check_watcher &)> {
236 void start () { io_manager::reg (*this); }
237 void stop () { io_manager::unreg (*this); }
238
136 template<class O1, class O2> 239 template<class O, class M>
137 check_watcher (O1 *object, void (O2::*method)(check_watcher &)) 240 check_watcher (O object, M method)
138 : callback1<void, check_watcher &>(object,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)
139 { } 256 { }
257 ~idle_watcher () { stop (); }
258};
259#endif
140 260
141 ~check_watcher (); 261#if IOM_SIG
262struct sig_watcher : watcher, callback<void (sig_watcher &)> {
263 int signum;
142 264
143 void start () { iom.reg (this); } 265 void start (int signum);
144 void stop () { iom.unreg (this); } 266 void stop () { io_manager::unreg (*this); }
145};
146#endif
147 267
268 template<class O, class M>
269 sig_watcher (O object, M method)
270 : callback<void(sig_watcher &)> (object, method), signum (0)
271 { }
272 ~sig_watcher () { stop (); }
273};
148#endif 274#endif
149 275
276#if IOM_CHILD
277struct child_watcher : watcher, callback<void (child_watcher &, int)> {
278 int /*pid_t*/ pid;
279
280 void start (int pid) { this->pid = pid; io_manager::reg (*this); }
281 void stop () { io_manager::unreg (*this); }
282
283 template<class O, class M>
284 child_watcher (O object, M method)
285 : callback<void (child_watcher &, int)> (object, method), pid (0)
286 { }
287 ~child_watcher () { stop (); }
288};
289#endif
290
291#endif
292

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