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 1.32 by pcg, Wed May 31 00:31:47 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#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)
49 43
50struct watcher; 44struct watcher;
51#if IOM_IO 45#if IOM_IO
52struct io_watcher; 46struct io_watcher;
53#endif 47#endif
… …
61struct idle_watcher; 55struct idle_watcher;
62#endif 56#endif
63#if IOM_SIG 57#if IOM_SIG
64struct sig_watcher; 58struct sig_watcher;
65#endif 59#endif
60#if IOM_CHILD
61struct child_watcher;
62#endif
66 63
67template<class watcher> 64template<class watcher>
68struct io_manager_vec : vector<watcher *> { 65struct io_manager_vec : vector<watcher *> {
69#if IOM_CHECK
70 bool activity;
71#endif
72
73 void erase_unordered (unsigned int pos) 66 void erase_unordered (unsigned int pos)
74 { 67 {
75 watcher *w = (*this)[size () - 1]; 68 watcher *w = (*this)[this->size () - 1];
76 pop_back (); 69 this->pop_back ();
77 70
78 if (size ()) 71 if (!this->empty ())
79 if ((*this)[pos] = w) 72 if (((*this)[pos] = w)) // '=' is correct!
80 w->active = pos + 1; 73 w->active = pos + 1;
81 } 74 }
82}; 75};
83 76
77// only used as a namespace, and for initialisation purposes
84class io_manager { 78class 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> 79 template<class watcher>
104 void reg (watcher *w, io_manager_vec<watcher> &queue); 80 static void reg (watcher &w, io_manager_vec<watcher> &queue);
105 81
106 template<class watcher> 82 template<class watcher>
107 void unreg (watcher *w, io_manager_vec<watcher> &queue); 83 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
108 84
109public: 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
110 // register a watcher 94 // register a watcher
111#if IOM_IO 95#if IOM_IO
112 void reg (io_watcher *w); void unreg (io_watcher *w); 96 static void reg (io_watcher &w); static void unreg (io_watcher &w);
113#endif 97#endif
114#if IOM_TIME 98#if IOM_TIME
115 void reg (time_watcher *w); void unreg (time_watcher *w); 99 static void reg (time_watcher &w); static void unreg (time_watcher &w);
116#endif 100#endif
117#if IOM_CHECK 101#if IOM_CHECK
118 void reg (check_watcher *w); void unreg (check_watcher *w); 102 static void reg (check_watcher &w); static void unreg (check_watcher &w);
119#endif 103#endif
120#if IOM_IDLE 104#if IOM_IDLE
121 void reg (idle_watcher *w); void unreg (idle_watcher *w); 105 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
122#endif 106#endif
123#if IOM_SIG 107#if IOM_SIG
124 void reg (sig_watcher *w); void unreg (sig_watcher *w); 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);
125#endif 112#endif
126 113
127 void loop (); 114 static void loop ();
128
129 io_manager ();
130 ~io_manager ();
131}; 115};
132
133extern io_manager iom; // a singleton, together with it's construction/destruction problems.
134 116
135struct watcher { 117struct watcher {
136 int active; /* 0 == inactive, else index into respective vector */ 118 int active; /* 0 == inactive, else index into respective vector */
137 119
120 bool is_active () { return active; }
121
138 watcher () : active (0) { } 122 watcher () : active (0) { }
139}; 123};
140 124
141#if IOM_IO 125#if IOM_IO
142enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 126enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = 1, EVENT_WRITE = 2 };
143 127
144struct io_watcher : watcher, callback2<void, io_watcher &, short> { 128struct io_watcher : watcher, callback<void (io_watcher &, short)> {
145 int fd; 129 int fd;
146 short events; 130 short events;
147 131
148 void set (int fd_, short events_) { fd = fd_; events = events_; } 132 void set (int fd_, short events_) { fd = fd_; events = events_; }
149 133
150 void set (short events_) { set (fd, events_); } 134 void set (short events_) { set (fd, events_); }
151 void start () { iom.reg (this); } 135 void start () { io_manager::reg (*this); }
152 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); }
153 void stop () { iom.unreg (this); } 137 void stop () { io_manager::unreg (*this); }
154 138
155 template<class O1, class O2> 139 template<class O1, class O2>
156 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short)) 140 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
157 : callback2<void, io_watcher &, short> (object,method) 141 : callback<void (io_watcher &, short)> (object, method)
158 { } 142 { }
159 ~io_watcher () { stop (); } 143 ~io_watcher () { stop (); }
160}; 144};
161#endif 145#endif
162 146
163#if IOM_TIME 147#if IOM_TIME
164struct time_watcher : watcher, callback1<void, time_watcher &> { 148struct time_watcher : watcher, callback<void (time_watcher &)> {
165 tstamp at; 149 tstamp at;
166 150
167 void trigger (); 151 void trigger ();
168 152
169 void set (tstamp when) { at = when; } 153 void set (tstamp when) { at = when; }
170 void operator () () { trigger (); } 154 void operator () () { trigger (); }
171 void start () { iom.reg (this); } 155 void start () { io_manager::reg (*this); }
172 void start (tstamp when) { set (when); iom.reg (this); } 156 void start (tstamp when) { set (when); io_manager::reg (*this); }
173 void stop () { iom.unreg (this); } 157 void stop () { io_manager::unreg (*this); }
174 158
175 template<class O1, class O2> 159 template<class O1, class O2>
176 time_watcher (O1 *object, void (O2::*method) (time_watcher &)) 160 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
177 : callback1<void, time_watcher &> (object,method), at (0) 161 : callback<void (time_watcher &)> (object, method), at (0)
178 { } 162 { }
179 ~time_watcher () { stop (); } 163 ~time_watcher () { stop (); }
180}; 164};
181#endif 165#endif
182 166
183#if IOM_CHECK 167#if IOM_CHECK
184// run before checking for new events 168// run before checking for new events
185struct check_watcher : watcher, callback1<void, check_watcher &> { 169struct check_watcher : watcher, callback<void (check_watcher &)> {
186 void start () { iom.reg (this); } 170 void start () { io_manager::reg (*this); }
187 void stop () { iom.unreg (this); } 171 void stop () { io_manager::unreg (*this); }
188 172
189 template<class O1, class O2> 173 template<class O1, class O2>
190 check_watcher (O1 *object, void (O2::*method) (check_watcher &)) 174 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
191 : callback1<void, check_watcher &> (object,method) 175 : callback<void (check_watcher &)> (object, method)
192 { } 176 { }
193 ~check_watcher () { stop (); } 177 ~check_watcher () { stop (); }
194}; 178};
195#endif 179#endif
196 180
197#if IOM_IDLE 181#if IOM_IDLE
198// run after checking for any i/o, but before waiting 182// run after checking for any i/o, but before waiting
199struct idle_watcher : watcher, callback1<void, idle_watcher &> { 183struct idle_watcher : watcher, callback<void (idle_watcher &)> {
200 void start () { iom.reg (this); } 184 void start () { io_manager::reg (*this); }
201 void stop () { iom.unreg (this); } 185 void stop () { io_manager::unreg (*this); }
202 186
203 template<class O1, class O2> 187 template<class O1, class O2>
204 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &)) 188 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
205 : callback1<void, idle_watcher &> (object,method) 189 : callback<void (idle_watcher &)> (object, method)
206 { } 190 { }
207 ~idle_watcher () { stop (); } 191 ~idle_watcher () { stop (); }
208}; 192};
209#endif 193#endif
210 194
211#if IOM_SIG 195#if IOM_SIG
212struct sig_watcher : watcher, callback1<void, sig_watcher &> { 196struct sig_watcher : watcher, callback<void (sig_watcher &)> {
213 int signum; 197 int signum;
214 198
215 void start (int signum); 199 void start (int signum);
216 void stop () { iom.unreg (this); } 200 void stop () { io_manager::unreg (*this); }
217 201
218 template<class O1, class O2> 202 template<class O1, class O2>
219 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &)) 203 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
220 : callback1<void, sig_watcher &> (object,method), signum (-1) 204 : callback<void(sig_watcher &)> (object, method), signum (0)
221 { } 205 { }
222 ~sig_watcher () { stop (); } 206 ~sig_watcher () { stop (); }
223}; 207};
224#endif 208#endif
225 209
226#endif 210#if IOM_CHILD
211struct child_watcher : watcher, callback<void (child_watcher &, int)> {
212 int /*pid_t*/ pid;
227 213
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

Diff Legend

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