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Comparing gvpe/src/iom.h (file contents):
Revision 1.15 by pcg, Sat Jan 17 01:18:36 2004 UTC vs.
Revision 1.28 by pcg, Mon Mar 7 01:31:26 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. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18*/ 20*/
19 21
20#ifndef IOM_H__ 22#ifndef IOM_H__
21#define IOM_H__ 23#define IOM_H__
… …
38# define IOM_CHECK 0 40# define IOM_CHECK 0
39#endif 41#endif
40#ifndef IOM_IDLE 42#ifndef IOM_IDLE
41# define IOM_IDLE 0 43# define IOM_IDLE 0
42#endif 44#endif
45#ifndef IOM_SIG
46# define IOM_SIG 0
47#endif
43 48
44typedef double tstamp; 49typedef double tstamp;
45extern tstamp NOW; 50extern tstamp NOW;
51
52// TSTAMP_MAX must still fit into a positive struct timeval
53#define TSTAMP_MAX (double)(1UL<<31)
46 54
47struct watcher; 55struct watcher;
48#if IOM_IO 56#if IOM_IO
49struct io_watcher; 57struct io_watcher;
50#endif 58#endif
… …
55struct check_watcher; 63struct check_watcher;
56#endif 64#endif
57#if IOM_IDLE 65#if IOM_IDLE
58struct idle_watcher; 66struct idle_watcher;
59#endif 67#endif
68#if IOM_SIG
69struct sig_watcher;
70#endif
60 71
61template<class watcher> 72template<class watcher>
62struct io_manager_vec : protected vector<watcher *> { 73struct io_manager_vec : vector<watcher *> {
63 friend class io_manager;
64protected:
65 void erase_unordered (unsigned int pos) 74 void erase_unordered (unsigned int pos)
66 { 75 {
67 watcher *w = (*this)[size () - 1]; 76 watcher *w = (*this)[this->size () - 1];
68 pop_back (); 77 this->pop_back ();
69 78
70 if (size ()) 79 if (!this->empty ())
71 if ((*this)[pos] = w) 80 if (((*this)[pos] = w)) // '=' is correct!
72 w->active = pos + 1; 81 w->active = pos + 1;
73 } 82 }
74}; 83};
75 84
85// only used as a namespace, and for initialisation purposes
76class io_manager { 86class io_manager {
77#if IOM_IO
78 io_manager_vec<io_watcher> iow;
79#endif
80#if IOM_CHECK
81 io_manager_vec<check_watcher> cw;
82#endif
83#if IOM_TIME
84 io_manager_vec<time_watcher> tw;
85#endif
86#if IOM_IDLE
87 io_manager_vec<idle_watcher> iw;
88#endif
89
90 template<class watcher> 87 template<class watcher>
91 void reg (watcher *w, io_manager_vec<watcher> &queue); 88 static void reg (watcher &w, io_manager_vec<watcher> &queue);
92 89
93 template<class watcher> 90 template<class watcher>
94 void unreg (watcher *w, io_manager_vec<watcher> &queue); 91 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
95 92
96public: 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
97 // register a watcher 102 // register a watcher
98#if IOM_IO 103#if IOM_IO
99 void reg (io_watcher *w); void unreg (io_watcher *w); 104 static void reg (io_watcher &w); static void unreg (io_watcher &w);
100#endif 105#endif
101#if IOM_TIME 106#if IOM_TIME
102 void reg (time_watcher *w); void unreg (time_watcher *w); 107 static void reg (time_watcher &w); static void unreg (time_watcher &w);
103#endif 108#endif
104#if IOM_CHECK 109#if IOM_CHECK
105 void reg (check_watcher *w); void unreg (check_watcher *w); 110 static void reg (check_watcher &w); static void unreg (check_watcher &w);
106#endif 111#endif
107#if IOM_IDLE 112#if IOM_IDLE
108 void reg (idle_watcher *w); void unreg (idle_watcher *w); 113 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
114#endif
115#if IOM_SIG
116 static void reg (sig_watcher &w); static void unreg (sig_watcher &w);
109#endif 117#endif
110 118
111 void loop (); 119 static void loop ();
112
113 io_manager ();
114 ~io_manager ();
115}; 120};
116
117extern io_manager iom; // a singleton, together with it's construction/destruction problems.
118 121
119struct watcher { 122struct watcher {
120 int active; /* 0 == inactive, else index into respective vector */ 123 int active; /* 0 == inactive, else index into respective vector */
121 124
122 watcher() : active(0) { } 125 watcher () : active (0) { }
123}; 126};
124 127
125#if IOM_IO 128#if IOM_IO
126enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 129enum { EVENT_READ = 1, EVENT_WRITE = 2 };
127 130
… …
130 short events; 133 short events;
131 134
132 void set (int fd_, short events_) { fd = fd_; events = events_; } 135 void set (int fd_, short events_) { fd = fd_; events = events_; }
133 136
134 void set (short events_) { set (fd, events_); } 137 void set (short events_) { set (fd, events_); }
135 void start () { iom.reg (this); } 138 void start () { io_manager::reg (*this); }
136 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); }
137 void stop () { iom.unreg (this); } 140 void stop () { io_manager::unreg (*this); }
138 141
139 template<class O1, class O2> 142 template<class O1, class O2>
140 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 143 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
141 : callback2<void, io_watcher &, short>(object,method) 144 : callback2<void, io_watcher &, short> (object,method)
142 { } 145 { }
143 ~io_watcher () { stop (); } 146 ~io_watcher () { stop (); }
144}; 147};
145#endif 148#endif
146 149
… …
149 tstamp at; 152 tstamp at;
150 153
151 void trigger (); 154 void trigger ();
152 155
153 void set (tstamp when) { at = when; } 156 void set (tstamp when) { at = when; }
154 void operator ()() { trigger (); } 157 void operator () () { trigger (); }
155 void start () { iom.reg (this); } 158 void start () { io_manager::reg (*this); }
156 void start (tstamp when) { set (when); iom.reg (this); } 159 void start (tstamp when) { set (when); io_manager::reg (*this); }
157 void stop () { iom.unreg (this); } 160 void stop () { io_manager::unreg (*this); }
158 161
159 template<class O1, class O2> 162 template<class O1, class O2>
160 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 163 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
161 : callback1<void, time_watcher &>(object,method) 164 : callback1<void, time_watcher &> (object,method), at (0)
162 { } 165 { }
163 ~time_watcher () { stop (); } 166 ~time_watcher () { stop (); }
164}; 167};
165#endif 168#endif
166 169
167#if IOM_CHECK 170#if IOM_CHECK
168// run before checking for new events 171// run before checking for new events
169struct check_watcher : watcher, callback1<void, check_watcher &> { 172struct check_watcher : watcher, callback1<void, check_watcher &> {
170 void start () { iom.reg (this); } 173 void start () { io_manager::reg (*this); }
171 void stop () { iom.unreg (this); } 174 void stop () { io_manager::unreg (*this); }
172 175
173 template<class O1, class O2> 176 template<class O1, class O2>
174 check_watcher (O1 *object, void (O2::*method)(check_watcher &)) 177 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
175 : callback1<void, check_watcher &>(object,method) 178 : callback1<void, check_watcher &> (object,method)
176 { } 179 { }
177 ~check_watcher () { stop (); } 180 ~check_watcher () { stop (); }
178}; 181};
179#endif 182#endif
180 183
181#if IOM_IDLE 184#if IOM_IDLE
182// run after checking for any i/o, but before waiting 185// run after checking for any i/o, but before waiting
183struct idle_watcher : watcher, callback1<void, idle_watcher &> { 186struct idle_watcher : watcher, callback1<void, idle_watcher &> {
184 void start () { iom.reg (this); } 187 void start () { io_manager::reg (*this); }
185 void stop () { iom.unreg (this); } 188 void stop () { io_manager::unreg (*this); }
186 189
187 template<class O1, class O2> 190 template<class O1, class O2>
188 idle_watcher (O1 *object, void (O2::*method)(idle_watcher &)) 191 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
189 : callback1<void, idle_watcher &>(object,method) 192 : callback1<void, idle_watcher &> (object,method)
190 { } 193 { }
191 ~idle_watcher () { stop (); } 194 ~idle_watcher () { stop (); }
192}; 195};
193#endif 196#endif
194 197
195#endif 198#if IOM_SIG
199struct sig_watcher : watcher, callback1<void, sig_watcher &> {
200 int signum;
196 201
202 void start (int signum);
203 void stop () { io_manager::unreg (*this); }
204
205 template<class O1, class O2>
206 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
207 : callback1<void, sig_watcher &> (object,method), signum (-1)
208 { }
209 ~sig_watcher () { stop (); }
210};
211#endif
212
213#endif
214

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