ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/gvpe/src/iom.h
(Generate patch)

Comparing gvpe/src/iom.h (file contents):
Revision 1.19 by pcg, Fri Apr 2 14:42:45 2004 UTC vs.
Revision 1.29 by pcg, Tue Apr 26 00:55:56 2005 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, 2004 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
… …
45#endif 47#endif
46 48
47typedef double tstamp; 49typedef double tstamp;
48extern tstamp NOW; 50extern tstamp NOW;
49 51
52// TSTAMP_MAX must still fit into a positive struct timeval
53#define TSTAMP_MAX (double)(1UL<<31)
54
50struct watcher; 55struct watcher;
51#if IOM_IO 56#if IOM_IO
52struct io_watcher; 57struct io_watcher;
53#endif 58#endif
54#if IOM_TIME 59#if IOM_TIME
… …
64struct sig_watcher; 69struct sig_watcher;
65#endif 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 {
85#if IOM_IO
86 io_manager_vec<io_watcher> iow;
87#endif
88#if IOM_CHECK
89 io_manager_vec<check_watcher> cw;
90#endif
91#if IOM_TIME
92 io_manager_vec<time_watcher> tw;
93#endif
94#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> 87 template<class watcher>
104 void reg (watcher *w, io_manager_vec<watcher> &queue); 88 static void reg (watcher &w, io_manager_vec<watcher> &queue);
105 89
106 template<class watcher> 90 template<class watcher>
107 void unreg (watcher *w, io_manager_vec<watcher> &queue); 91 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
108 92
109public: 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
110 // register a watcher 102 // register a watcher
111#if IOM_IO 103#if IOM_IO
112 void reg (io_watcher *w); void unreg (io_watcher *w); 104 static void reg (io_watcher &w); static void unreg (io_watcher &w);
113#endif 105#endif
114#if IOM_TIME 106#if IOM_TIME
115 void reg (time_watcher *w); void unreg (time_watcher *w); 107 static void reg (time_watcher &w); static void unreg (time_watcher &w);
116#endif 108#endif
117#if IOM_CHECK 109#if IOM_CHECK
118 void reg (check_watcher *w); void unreg (check_watcher *w); 110 static void reg (check_watcher &w); static void unreg (check_watcher &w);
119#endif 111#endif
120#if IOM_IDLE 112#if IOM_IDLE
121 void reg (idle_watcher *w); void unreg (idle_watcher *w); 113 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
122#endif 114#endif
123#if IOM_SIG 115#if IOM_SIG
124 void reg (sig_watcher *w); void unreg (sig_watcher *w); 116 static void reg (sig_watcher &w); static void unreg (sig_watcher &w);
125#endif 117#endif
126 118
127 void loop (); 119 static void loop ();
128
129 io_manager ();
130 ~io_manager ();
131}; 120};
132
133extern io_manager iom; // a singleton, together with it's construction/destruction problems.
134 121
135struct watcher { 122struct watcher {
136 int active; /* 0 == inactive, else index into respective vector */ 123 int active; /* 0 == inactive, else index into respective vector */
137 124
138 watcher () : active (0) { } 125 watcher () : active (0) { }
… …
146 short events; 133 short events;
147 134
148 void set (int fd_, short events_) { fd = fd_; events = events_; } 135 void set (int fd_, short events_) { fd = fd_; events = events_; }
149 136
150 void set (short events_) { set (fd, events_); } 137 void set (short events_) { set (fd, events_); }
151 void start () { iom.reg (this); } 138 void start () { io_manager::reg (*this); }
152 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } 139 void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); }
153 void stop () { iom.unreg (this); } 140 void stop () { io_manager::unreg (*this); }
154 141
155 template<class O1, class O2> 142 template<class O1, class O2>
156 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short)) 143 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
157 : callback2<void, io_watcher &, short> (object,method) 144 : callback2<void, io_watcher &, short> (object,method)
158 { } 145 { }
… …
166 153
167 void trigger (); 154 void trigger ();
168 155
169 void set (tstamp when) { at = when; } 156 void set (tstamp when) { at = when; }
170 void operator () () { trigger (); } 157 void operator () () { trigger (); }
171 void start () { iom.reg (this); } 158 void start () { io_manager::reg (*this); }
172 void start (tstamp when) { set (when); iom.reg (this); } 159 void start (tstamp when) { set (when); io_manager::reg (*this); }
173 void stop () { iom.unreg (this); } 160 void stop () { io_manager::unreg (*this); }
174 161
175 template<class O1, class O2> 162 template<class O1, class O2>
176 time_watcher (O1 *object, void (O2::*method) (time_watcher &)) 163 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
177 : callback1<void, time_watcher &> (object,method), at (0) 164 : callback1<void, time_watcher &> (object,method), at (0)
178 { } 165 { }
… …
181#endif 168#endif
182 169
183#if IOM_CHECK 170#if IOM_CHECK
184// run before checking for new events 171// run before checking for new events
185struct check_watcher : watcher, callback1<void, check_watcher &> { 172struct check_watcher : watcher, callback1<void, check_watcher &> {
186 void start () { iom.reg (this); } 173 void start () { io_manager::reg (*this); }
187 void stop () { iom.unreg (this); } 174 void stop () { io_manager::unreg (*this); }
188 175
189 template<class O1, class O2> 176 template<class O1, class O2>
190 check_watcher (O1 *object, void (O2::*method) (check_watcher &)) 177 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
191 : callback1<void, check_watcher &> (object,method) 178 : callback1<void, check_watcher &> (object,method)
192 { } 179 { }
… …
195#endif 182#endif
196 183
197#if IOM_IDLE 184#if IOM_IDLE
198// run after checking for any i/o, but before waiting 185// run after checking for any i/o, but before waiting
199struct idle_watcher : watcher, callback1<void, idle_watcher &> { 186struct idle_watcher : watcher, callback1<void, idle_watcher &> {
200 void start () { iom.reg (this); } 187 void start () { io_manager::reg (*this); }
201 void stop () { iom.unreg (this); } 188 void stop () { io_manager::unreg (*this); }
202 189
203 template<class O1, class O2> 190 template<class O1, class O2>
204 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &)) 191 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
205 : callback1<void, idle_watcher &> (object,method) 192 : callback1<void, idle_watcher &> (object,method)
206 { } 193 { }
… …
211#if IOM_SIG 198#if IOM_SIG
212struct sig_watcher : watcher, callback1<void, sig_watcher &> { 199struct sig_watcher : watcher, callback1<void, sig_watcher &> {
213 int signum; 200 int signum;
214 201
215 void start (int signum); 202 void start (int signum);
216 void stop () { iom.unreg (this); } 203 void stop () { io_manager::unreg (*this); }
217 204
218 template<class O1, class O2> 205 template<class O1, class O2>
219 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &)) 206 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
220 : callback1<void, sig_watcher &> (object,method), signum (-1) 207 : callback1<void, sig_watcher &> (object,method), signum (-1)
221 { } 208 { }

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines