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Comparing rxvt-unicode/src/iom.h (file contents):
Revision 1.11 by pcg, Fri Feb 13 12:16:21 2004 UTC vs.
Revision 1.28 by root, Wed May 31 00:32:56 2006 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)
46 43
47struct watcher; 44struct watcher;
48#if IOM_IO 45#if IOM_IO
49struct io_watcher; 46struct io_watcher;
50#endif 47#endif
… …
55struct check_watcher; 52struct check_watcher;
56#endif 53#endif
57#if IOM_IDLE 54#if IOM_IDLE
58struct idle_watcher; 55struct idle_watcher;
59#endif 56#endif
57#if IOM_SIG
58struct sig_watcher;
59#endif
60#if IOM_CHILD
61struct child_watcher;
62#endif
60 63
61template<class watcher> 64template<class watcher>
62struct io_manager_vec : vector<watcher *> { 65struct io_manager_vec : vector<watcher *> {
63#if IOM_CHECK
64 bool activity;
65#endif
66
67 void erase_unordered (unsigned int pos) 66 void erase_unordered (unsigned int pos)
68 { 67 {
69 watcher *w = (*this)[size () - 1]; 68 watcher *w = (*this)[this->size () - 1];
70 pop_back (); 69 this->pop_back ();
71 70
72 if (size ()) 71 if (!this->empty ())
73 if ((*this)[pos] = w) 72 if (((*this)[pos] = w)) // '=' is correct!
74 w->active = pos + 1; 73 w->active = pos + 1;
75 } 74 }
76}; 75};
77 76
77// only used as a namespace, and for initialisation purposes
78class io_manager { 78class io_manager {
79#if IOM_IO
80 io_manager_vec<io_watcher> iow;
81#endif
82#if IOM_CHECK
83 io_manager_vec<check_watcher> cw;
84#endif
85#if IOM_TIME
86 io_manager_vec<time_watcher> tw;
87#endif
88#if IOM_IDLE
89 io_manager_vec<idle_watcher> iw;
90#endif
91
92 template<class watcher> 79 template<class watcher>
93 void reg (watcher *w, io_manager_vec<watcher> &queue); 80 static void reg (watcher &w, io_manager_vec<watcher> &queue);
94 81
95 template<class watcher> 82 template<class watcher>
96 void unreg (watcher *w, io_manager_vec<watcher> &queue); 83 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
97 84
98public: 85public:
86#if IOM_TIME
87 // fetch time only
88 static tstamp now ();
89
90 // set NOW
91 static void set_now ();
92#endif
93
99 // register a watcher 94 // register a watcher
100#if IOM_IO 95#if IOM_IO
101 void reg (io_watcher *w); void unreg (io_watcher *w); 96 static void reg (io_watcher &w); static void unreg (io_watcher &w);
102#endif 97#endif
103#if IOM_TIME 98#if IOM_TIME
104 void reg (time_watcher *w); void unreg (time_watcher *w); 99 static void reg (time_watcher &w); static void unreg (time_watcher &w);
105#endif 100#endif
106#if IOM_CHECK 101#if IOM_CHECK
107 void reg (check_watcher *w); void unreg (check_watcher *w); 102 static void reg (check_watcher &w); static void unreg (check_watcher &w);
108#endif 103#endif
109#if IOM_IDLE 104#if IOM_IDLE
110 void reg (idle_watcher *w); void unreg (idle_watcher *w); 105 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
106#endif
107#if IOM_SIG
108 static void reg (sig_watcher &w); static void unreg (sig_watcher &w);
109#endif
110#if IOM_CHILD
111 static void reg (child_watcher &w); static void unreg (child_watcher &w);
111#endif 112#endif
112 113
113 void loop (); 114 static void loop ();
114
115 io_manager ();
116 ~io_manager ();
117}; 115};
118
119extern io_manager iom; // a singleton, together with it's construction/destruction problems.
120 116
121struct watcher { 117struct watcher {
122 int active; /* 0 == inactive, else index into respective vector */ 118 int active; /* 0 == inactive, else index into respective vector */
123 119
120 bool is_active () { return active; }
121
124 watcher () : active (0) { } 122 watcher () : active (0) { }
125}; 123};
126 124
127#if IOM_IO 125#if IOM_IO
128enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 126enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = 1, EVENT_WRITE = 2 };
129 127
130struct io_watcher : watcher, callback2<void, io_watcher &, short> { 128struct io_watcher : watcher, callback<void (io_watcher &, short)> {
131 int fd; 129 int fd;
132 short events; 130 short events;
133 131
134 void set (int fd_, short events_) { fd = fd_; events = events_; } 132 void set (int fd_, short events_) { fd = fd_; events = events_; }
135 133
136 void set (short events_) { set (fd, events_); } 134 void set (short events_) { set (fd, events_); }
137 void start () { iom.reg (this); } 135 void start () { io_manager::reg (*this); }
138 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } 136 void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); }
139 void stop () { iom.unreg (this); } 137 void stop () { io_manager::unreg (*this); }
140 138
141 template<class O1, class O2> 139 template<class O1, class O2>
142 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short)) 140 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
143 : callback2<void, io_watcher &, short> (object,method) 141 : callback<void (io_watcher &, short)> (object, method)
144 { } 142 { }
145 ~io_watcher () { stop (); } 143 ~io_watcher () { stop (); }
146}; 144};
147#endif 145#endif
148 146
149#if IOM_TIME 147#if IOM_TIME
150struct time_watcher : watcher, callback1<void, time_watcher &> { 148struct time_watcher : watcher, callback<void (time_watcher &)> {
151 tstamp at; 149 tstamp at;
152 150
153 void trigger (); 151 void trigger ();
154 152
155 void set (tstamp when) { at = when; } 153 void set (tstamp when) { at = when; }
156 void operator () () { trigger (); } 154 void operator () () { trigger (); }
157 void start () { iom.reg (this); } 155 void start () { io_manager::reg (*this); }
158 void start (tstamp when) { set (when); iom.reg (this); } 156 void start (tstamp when) { set (when); io_manager::reg (*this); }
159 void stop () { iom.unreg (this); } 157 void stop () { io_manager::unreg (*this); }
160 158
161 template<class O1, class O2> 159 template<class O1, class O2>
162 time_watcher (O1 *object, void (O2::*method) (time_watcher &)) 160 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
163 : callback1<void, time_watcher &> (object,method), at (0) 161 : callback<void (time_watcher &)> (object, method), at (0)
164 { } 162 { }
165 ~time_watcher () { stop (); } 163 ~time_watcher () { stop (); }
166}; 164};
167#endif 165#endif
168 166
169#if IOM_CHECK 167#if IOM_CHECK
170// run before checking for new events 168// run before checking for new events
171struct check_watcher : watcher, callback1<void, check_watcher &> { 169struct check_watcher : watcher, callback<void (check_watcher &)> {
172 void start () { iom.reg (this); } 170 void start () { io_manager::reg (*this); }
173 void stop () { iom.unreg (this); } 171 void stop () { io_manager::unreg (*this); }
174 172
175 template<class O1, class O2> 173 template<class O1, class O2>
176 check_watcher (O1 *object, void (O2::*method) (check_watcher &)) 174 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
177 : callback1<void, check_watcher &> (object,method) 175 : callback<void (check_watcher &)> (object, method)
178 { } 176 { }
179 ~check_watcher () { stop (); } 177 ~check_watcher () { stop (); }
180}; 178};
181#endif 179#endif
182 180
183#if IOM_IDLE 181#if IOM_IDLE
184// run after checking for any i/o, but before waiting 182// run after checking for any i/o, but before waiting
185struct idle_watcher : watcher, callback1<void, idle_watcher &> { 183struct idle_watcher : watcher, callback<void (idle_watcher &)> {
186 void start () { iom.reg (this); } 184 void start () { io_manager::reg (*this); }
187 void stop () { iom.unreg (this); } 185 void stop () { io_manager::unreg (*this); }
188 186
189 template<class O1, class O2> 187 template<class O1, class O2>
190 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &)) 188 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
191 : callback1<void, idle_watcher &> (object,method) 189 : callback<void (idle_watcher &)> (object, method)
192 { } 190 { }
193 ~idle_watcher () { stop (); } 191 ~idle_watcher () { stop (); }
194}; 192};
195#endif 193#endif
196 194
197#endif 195#if IOM_SIG
196struct sig_watcher : watcher, callback<void (sig_watcher &)> {
197 int signum;
198 198
199 void start (int signum);
200 void stop () { io_manager::unreg (*this); }
201
202 template<class O1, class O2>
203 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
204 : callback<void(sig_watcher &)> (object, method), signum (0)
205 { }
206 ~sig_watcher () { stop (); }
207};
208#endif
209
210#if IOM_CHILD
211struct child_watcher : watcher, callback<void (child_watcher &, int)> {
212 int /*pid_t*/ pid;
213
214 void start (int pid) { this->pid = pid; io_manager::reg (*this); }
215 void stop () { io_manager::unreg (*this); }
216
217 template<class O1, class O2>
218 child_watcher (O1 *object, void (O2::*method) (child_watcher &, int status))
219 : callback<void (child_watcher &, int)> (object, method), pid (0)
220 { }
221 ~child_watcher () { stop (); }
222};
223#endif
224
225#endif
226

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