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Comparing cvsroot/rxvt-unicode/src/iom.h (file contents):
Revision 1.12 by pcg, Fri Apr 2 14:30:06 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#ifndef IOM_SIG
44# define IOM_SIG 0
45#endif
46 37
47typedef double tstamp; 38typedef double tstamp;
48extern 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
49 51
50struct watcher; 52struct watcher;
51#if IOM_IO 53#if IOM_IO
52struct io_watcher; 54struct io_watcher;
53#endif 55#endif
… …
61struct idle_watcher; 63struct idle_watcher;
62#endif 64#endif
63#if IOM_SIG 65#if IOM_SIG
64struct sig_watcher; 66struct sig_watcher;
65#endif 67#endif
68#if IOM_CHILD
69struct child_watcher;
70#endif
66 71
67template<class watcher> 72template<class watcher>
68struct io_manager_vec : vector<watcher *> { 73struct io_manager_vec : vector<watcher *> {
69#if IOM_CHECK
70 bool activity;
71#endif
72
73 void erase_unordered (unsigned int pos) 74 void erase_unordered (unsigned int pos)
74 { 75 {
75 watcher *w = (*this)[size () - 1]; 76 watcher *w = (*this)[this->size () - 1];
76 pop_back (); 77 this->pop_back ();
77 78
78 if (size ()) 79 if (!this->empty ())
79 if ((*this)[pos] = w) 80 if (((*this)[pos] = w)) // '=' is correct!
80 w->active = pos + 1; 81 w->active = pos + 1;
81 } 82 }
82}; 83};
83 84
85// only used as a namespace, and for initialisation purposes
84class 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
85#if IOM_IO 104#if IOM_IO
86 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);
87#endif 112#endif
88#if IOM_CHECK 113#if IOM_CHECK
89 io_manager_vec<check_watcher> cw; 114 static void reg (check_watcher &w); static void unreg (check_watcher &w);
90#endif 115#endif
91#if IOM_TIME
92 io_manager_vec<time_watcher> tw;
93#endif 116#endif
94#if IOM_IDLE 117#if IOM_IDLE
95 io_manager_vec<idle_watcher> iw;
96#endif
97#if IOM_SIG
98 typedef io_manager_vec<sig_watcher> sig_vec;
99 vector<sig_vec *> sw;
100 static void sighandler (int signum);
101#endif
102
103 template<class watcher>
104 void reg (watcher *w, io_manager_vec<watcher> &queue);
105
106 template<class watcher>
107 void unreg (watcher *w, io_manager_vec<watcher> &queue);
108
109public:
110 // register a watcher
111#if IOM_IO
112 void reg (io_watcher *w); void unreg (io_watcher *w);
113#endif
114#if IOM_TIME
115 void reg (time_watcher *w); void unreg (time_watcher *w);
116#endif
117#if IOM_CHECK
118 void reg (check_watcher *w); void unreg (check_watcher *w);
119#endif
120#if IOM_IDLE
121 void reg (idle_watcher *w); void unreg (idle_watcher *w); 118 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
122#endif 119#endif
123#if IOM_SIG 120#if IOM_CHILD
124 void reg (sig_watcher *w); void unreg (sig_watcher *w); 121 static void reg (child_watcher &w); static void unreg (child_watcher &w);
125#endif 122#endif
126 123
127 void loop (); 124 static void loop ();
128
129 io_manager ();
130 ~io_manager ();
131}; 125};
132
133extern io_manager iom; // a singleton, together with it's construction/destruction problems.
134 126
135struct watcher { 127struct watcher {
136 int active; /* 0 == inactive, else index into respective vector */ 128 int active; /* 0 == inactive, else index into respective vector */
137 129
130 bool is_active () { return active; }
131
138 watcher () : active (0) { } 132 watcher () : active (0) { }
139}; 133};
140 134
141#if IOM_IO 135#if IOM_IO
142enum { 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 };
143 138
139void iom_io_c_callback (int fd, short events, void *data);
140
144struct 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)> {
145 int fd; 162 int fd;
146 short events; 163 short events;
147 164
148 void set (int fd_, short events_) { fd = fd_; events = events_; } 165 void set (int fd_, short events_) { fd = fd_; events = events_; }
149 166
150 void set (short events_) { set (fd, events_); } 167 void set (short events_) { set (fd, events_); }
151 void start () { iom.reg (this); } 168 void start () { io_manager::reg (*this); }
152 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } 169 void start (int fd_, short events_) { set (fd_, events_); start (); }
153 void stop () { iom.unreg (this); } 170 void stop () { io_manager::unreg (*this); }
154 171
155 template<class O1, class O2> 172 template<class O, class M>
156 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short)) 173 io_watcher (O object, M method)
157 : callback2<void, io_watcher &, short> (object,method) 174 : callback<void (io_watcher &, short)> (object, method)
158 { } 175 { }
159 ~io_watcher () { stop (); } 176 ~io_watcher () { stop (); }
160}; 177};
161#endif 178#endif
179#endif
162 180
163#if IOM_TIME 181#if IOM_TIME
182#ifdef IOM_LIBEVENT
183void iom_time_c_callback (int fd, short events, void *data);
184
164struct time_watcher : watcher, callback1<void, time_watcher &> { 185struct time_watcher : watcher, callback<void (time_watcher &)> {
186 struct event ev;
165 tstamp at; 187 tstamp at;
166 188
167 void trigger (); 189 void trigger ();
168 190
169 void set (tstamp when) { at = when; } 191 void set (tstamp when) { at = when; }
170 void operator () () { trigger (); } 192 void operator () () { trigger (); }
171 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 }
172 void start (tstamp when) { set (when); iom.reg (this); } 201 void start (tstamp when) { set (when); start (); }
173 void stop () { iom.unreg (this); } 202 void stop () { if (active) evtimer_del (&ev); active = 0; }
174 203
175 template<class O1, class O2> 204 template<class O, class M>
176 time_watcher (O1 *object, void (O2::*method) (time_watcher &)) 205 time_watcher (O object, M method)
177 : callback1<void, time_watcher &> (object,method), at (0) 206 : callback<void (time_watcher &)> (object, method), at (0)
178 { } 207 {
208 evtimer_set (&ev, iom_time_c_callback, (void *)this);
209 }
179 ~time_watcher () { stop (); } 210 ~time_watcher () { stop (); }
180}; 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
181#endif 231#endif
182 232
183#if IOM_CHECK 233#if IOM_CHECK
184// run before checking for new events 234// run before checking for new events
185struct check_watcher : watcher, callback1<void, check_watcher &> { 235struct check_watcher : watcher, callback<void (check_watcher &)> {
186 void start () { iom.reg (this); } 236 void start () { io_manager::reg (*this); }
187 void stop () { iom.unreg (this); } 237 void stop () { io_manager::unreg (*this); }
188 238
189 template<class O1, class O2> 239 template<class O, class M>
190 check_watcher (O1 *object, void (O2::*method) (check_watcher &)) 240 check_watcher (O object, M method)
191 : callback1<void, check_watcher &> (object,method) 241 : callback<void (check_watcher &)> (object, method)
192 { } 242 { }
193 ~check_watcher () { stop (); } 243 ~check_watcher () { stop (); }
194}; 244};
195#endif 245#endif
196 246
197#if IOM_IDLE 247#if IOM_IDLE
198// run after checking for any i/o, but before waiting 248// run after checking for any i/o, but before waiting
199struct idle_watcher : watcher, callback1<void, idle_watcher &> { 249struct idle_watcher : watcher, callback<void (idle_watcher &)> {
200 void start () { iom.reg (this); } 250 void start () { io_manager::reg (*this); }
201 void stop () { iom.unreg (this); } 251 void stop () { io_manager::unreg (*this); }
202 252
203 template<class O1, class O2> 253 template<class O, class M>
204 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &)) 254 idle_watcher (O object, M method)
205 : callback1<void, idle_watcher &> (object,method) 255 : callback<void (idle_watcher &)> (object, method)
206 { } 256 { }
207 ~idle_watcher () { stop (); } 257 ~idle_watcher () { stop (); }
208}; 258};
209#endif 259#endif
210 260
211#if IOM_SIG 261#if IOM_SIG
212struct sig_watcher : watcher, callback1<void, sig_watcher &> { 262struct sig_watcher : watcher, callback<void (sig_watcher &)> {
213 int signum; 263 int signum;
214 264
215 void start (int signum); 265 void start (int signum);
216 void stop () { iom.unreg (this); } 266 void stop () { io_manager::unreg (*this); }
217 267
218 template<class O1, class O2> 268 template<class O, class M>
219 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &)) 269 sig_watcher (O object, M method)
220 : callback1<void, sig_watcher &> (object,method), signum (-1) 270 : callback<void(sig_watcher &)> (object, method), signum (0)
221 { } 271 { }
222 ~sig_watcher () { stop (); } 272 ~sig_watcher () { stop (); }
223}; 273};
224#endif 274#endif
225 275
226#endif 276#if IOM_CHILD
277struct child_watcher : watcher, callback<void (child_watcher &, int)> {
278 int /*pid_t*/ pid;
227 279
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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