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Comparing rxvt-unicode/src/iom.h (file contents):
Revision 1.10 by pcg, Mon Feb 9 07:11:49 2004 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, 2004 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 IOM_H__ 22#ifndef IOM_H__
21#define IOM_H__ 23#define IOM_H__
22 24
… …
24// - a vector template like simplevec or stl's vector 26// - a vector template like simplevec or stl's vector
25// - defines for all watcher types required in your app 27// - defines for all watcher types required in your app
26// edit iom_conf.h as appropriate. 28// edit iom_conf.h as appropriate.
27#include "iom_conf.h" 29#include "iom_conf.h"
28 30
31#if IOM_CHILD
32# undef IOM_SIG
33# define IOM_SIG 1
34#endif
35
29#include "callback.h" 36#include "callback.h"
30
31#ifndef IOM_IO
32# define IOM_IO 0
33#endif
34#ifndef IOM_TIME
35# define IOM_TIME 0
36#endif
37#ifndef IOM_CHECK
38# define IOM_CHECK 0
39#endif
40#ifndef IOM_IDLE
41# define IOM_IDLE 0
42#endif
43 37
44typedef double tstamp; 38typedef double tstamp;
45extern tstamp NOW; 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
49# define IOM_IO 1
50#endif
46 51
47struct watcher; 52struct watcher;
48#if IOM_IO 53#if IOM_IO
49struct io_watcher; 54struct io_watcher;
50#endif 55#endif
… …
55struct check_watcher; 60struct check_watcher;
56#endif 61#endif
57#if IOM_IDLE 62#if IOM_IDLE
58struct idle_watcher; 63struct idle_watcher;
59#endif 64#endif
65#if IOM_SIG
66struct sig_watcher;
67#endif
68#if IOM_CHILD
69struct child_watcher;
70#endif
60 71
61template<class watcher> 72template<class watcher>
62struct io_manager_vec : vector<watcher *> { 73struct io_manager_vec : vector<watcher *> {
63#if IOM_CHECK
64 bool activity;
65#endif
66
67 void erase_unordered (unsigned int pos) 74 void erase_unordered (unsigned int pos)
68 { 75 {
69 watcher *w = (*this)[size () - 1]; 76 watcher *w = (*this)[this->size () - 1];
70 pop_back (); 77 this->pop_back ();
71 78
72 if (size ()) 79 if (!this->empty ())
73 if ((*this)[pos] = w) 80 if (((*this)[pos] = w)) // '=' is correct!
74 w->active = pos + 1; 81 w->active = pos + 1;
75 } 82 }
76}; 83};
77 84
85// only used as a namespace, and for initialisation purposes
78class 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
79#if IOM_IO 104#if IOM_IO
80 io_manager_vec<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);
81#endif 112#endif
82#if IOM_CHECK 113#if IOM_CHECK
83 io_manager_vec<check_watcher> cw; 114 static void reg (check_watcher &w); static void unreg (check_watcher &w);
84#endif 115#endif
85#if IOM_TIME
86 io_manager_vec<time_watcher> tw;
87#endif 116#endif
88#if IOM_IDLE 117#if IOM_IDLE
89 io_manager_vec<idle_watcher> iw;
90#endif
91
92 template<class watcher>
93 void reg (watcher *w, io_manager_vec<watcher> &queue);
94
95 template<class watcher>
96 void unreg (watcher *w, io_manager_vec<watcher> &queue);
97
98public:
99 // register a watcher
100#if IOM_IO
101 void reg (io_watcher *w); void unreg (io_watcher *w);
102#endif
103#if IOM_TIME
104 void reg (time_watcher *w); void unreg (time_watcher *w);
105#endif
106#if IOM_CHECK
107 void reg (check_watcher *w); void unreg (check_watcher *w);
108#endif
109#if IOM_IDLE
110 void reg (idle_watcher *w); void unreg (idle_watcher *w); 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);
111#endif 122#endif
112 123
113 void loop (); 124 static void loop ();
114
115 io_manager ();
116 ~io_manager ();
117}; 125};
118
119extern io_manager iom; // a singleton, together with it's construction/destruction problems.
120 126
121struct watcher { 127struct watcher {
122 int active; /* 0 == inactive, else index into respective vector */ 128 int active; /* 0 == inactive, else index into respective vector */
123 129
130 bool is_active () { return active; }
131
124 watcher() : active(0) { } 132 watcher () : active (0) { }
125}; 133};
126 134
127#if IOM_IO 135#if IOM_IO
128enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 136#ifdef IOM_LIBEVENT
137enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = EV_READ, EVENT_WRITE = EV_WRITE };
129 138
139void iom_io_c_callback (int fd, short events, void *data);
140
130struct io_watcher : 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)> {
131 int fd; 162 int fd;
132 short events; 163 short events;
133 164
134 void set (int fd_, short events_) { fd = fd_; events = events_; } 165 void set (int fd_, short events_) { fd = fd_; events = events_; }
135 166
136 void set (short events_) { set (fd, events_); } 167 void set (short events_) { set (fd, events_); }
137 void start () { iom.reg (this); } 168 void start () { io_manager::reg (*this); }
138 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } 169 void start (int fd_, short events_) { set (fd_, events_); start (); }
139 void stop () { iom.unreg (this); } 170 void stop () { io_manager::unreg (*this); }
140 171
141 template<class O1, class O2> 172 template<class O, class M>
142 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 173 io_watcher (O object, M method)
143 : callback2<void, io_watcher &, short>(object,method) 174 : callback<void (io_watcher &, short)> (object, method)
144 { } 175 { }
145 ~io_watcher () { stop (); } 176 ~io_watcher () { stop (); }
146}; 177};
147#endif 178#endif
179#endif
148 180
149#if IOM_TIME 181#if IOM_TIME
182#ifdef IOM_LIBEVENT
183void iom_time_c_callback (int fd, short events, void *data);
184
150struct time_watcher : watcher, callback1<void, time_watcher &> { 185struct time_watcher : watcher, callback<void (time_watcher &)> {
186 struct event ev;
151 tstamp at; 187 tstamp at;
152 188
153 void trigger (); 189 void trigger ();
154 190
155 void set (tstamp when) { at = when; } 191 void set (tstamp when) { at = when; }
156 void operator ()() { trigger (); } 192 void operator () () { trigger (); }
157 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 }
158 void start (tstamp when) { set (when); iom.reg (this); } 201 void start (tstamp when) { set (when); start (); }
159 void stop () { iom.unreg (this); } 202 void stop () { if (active) evtimer_del (&ev); active = 0; }
160 203
161 template<class O1, class O2> 204 template<class O, class M>
162 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 205 time_watcher (O object, M method)
163 : callback1<void, time_watcher &>(object,method), at(0) 206 : callback<void (time_watcher &)> (object, method), at (0)
164 { } 207 {
208 evtimer_set (&ev, iom_time_c_callback, (void *)this);
209 }
165 ~time_watcher () { stop (); } 210 ~time_watcher () { stop (); }
166}; 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
167#endif 231#endif
168 232
169#if IOM_CHECK 233#if IOM_CHECK
170// run before checking for new events 234// run before checking for new events
171struct check_watcher : watcher, callback1<void, check_watcher &> { 235struct check_watcher : watcher, callback<void (check_watcher &)> {
172 void start () { iom.reg (this); } 236 void start () { io_manager::reg (*this); }
173 void stop () { iom.unreg (this); } 237 void stop () { io_manager::unreg (*this); }
174 238
175 template<class O1, class O2> 239 template<class O, class M>
176 check_watcher (O1 *object, void (O2::*method)(check_watcher &)) 240 check_watcher (O object, M method)
177 : callback1<void, check_watcher &>(object,method) 241 : callback<void (check_watcher &)> (object, method)
178 { } 242 { }
179 ~check_watcher () { stop (); } 243 ~check_watcher () { stop (); }
180}; 244};
181#endif 245#endif
182 246
183#if IOM_IDLE 247#if IOM_IDLE
184// run after checking for any i/o, but before waiting 248// run after checking for any i/o, but before waiting
185struct idle_watcher : watcher, callback1<void, idle_watcher &> { 249struct idle_watcher : watcher, callback<void (idle_watcher &)> {
186 void start () { iom.reg (this); } 250 void start () { io_manager::reg (*this); }
187 void stop () { iom.unreg (this); } 251 void stop () { io_manager::unreg (*this); }
188 252
189 template<class O1, class O2> 253 template<class O, class M>
190 idle_watcher (O1 *object, void (O2::*method)(idle_watcher &)) 254 idle_watcher (O object, M method)
191 : callback1<void, idle_watcher &>(object,method) 255 : callback<void (idle_watcher &)> (object, method)
192 { } 256 { }
193 ~idle_watcher () { stop (); } 257 ~idle_watcher () { stop (); }
194}; 258};
195#endif 259#endif
196 260
197#endif 261#if IOM_SIG
262struct sig_watcher : watcher, callback<void (sig_watcher &)> {
263 int signum;
198 264
265 void start (int signum);
266 void stop () { io_manager::unreg (*this); }
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};
274#endif
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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