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Comparing gvpe/src/iom.h (file contents):
Revision 1.14 by pcg, Thu Oct 16 02:41:21 2003 UTC vs.
Revision 1.15 by pcg, Sat Jan 17 01:18:36 2004 UTC

1/* 1/*
2 iom.h -- generic I/O multiplexor 2 iom.h -- generic I/O multiplexor
3 Copyright (C) 2003 Marc Lehmann <pcg@goof.com> 3 Copyright (C) 2003, 2004 Marc Lehmann <pcg@goof.com>
4 4
5 This program is free software; you can redistribute it and/or modify 5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by 6 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 7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version. 8 (at your option) any later version.
… …
15 You should have received a copy of the GNU General Public License 15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software 16 along with this program; if not, write to the Free Software
17 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18*/ 18*/
19 19
20#ifndef VPE_IOM_H__ 20#ifndef IOM_H__
21#define VPE_IOM_H__ 21#define IOM_H__
22 22
23#include <vector> 23// required:
24 24// - a vector template like simplevec or stl's vector
25#include <cassert> 25// - defines for all watcher types required in your app
26 26// edit iom_conf.h as appropriate.
27#include "poll.h" 27#include "iom_conf.h"
28 28
29#include "callback.h" 29#include "callback.h"
30#include "slog.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
31 43
32typedef double tstamp; 44typedef double tstamp;
33
34extern tstamp NOW; 45extern tstamp NOW;
35 46
47struct watcher;
48#if IOM_IO
36struct io_watcher; 49struct io_watcher;
50#endif
51#if IOM_TIME
37struct time_watcher; 52struct time_watcher;
53#endif
54#if IOM_CHECK
55struct check_watcher;
56#endif
57#if IOM_IDLE
58struct idle_watcher;
59#endif
60
61template<class watcher>
62struct io_manager_vec : protected vector<watcher *> {
63 friend class io_manager;
64protected:
65 void erase_unordered (unsigned int pos)
66 {
67 watcher *w = (*this)[size () - 1];
68 pop_back ();
69
70 if (size ())
71 if ((*this)[pos] = w)
72 w->active = pos + 1;
73 }
74};
38 75
39class io_manager { 76class io_manager {
40 vector<pollfd> pfs; 77#if IOM_IO
41 vector<io_watcher *> iow; 78 io_manager_vec<io_watcher> iow;
42 vector<time_watcher *> tw; // actually a heap 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
43 89
44 void idle_cb (time_watcher &w); time_watcher *idle; 90 template<class watcher>
91 void reg (watcher *w, io_manager_vec<watcher> &queue);
92
93 template<class watcher>
94 void unreg (watcher *w, io_manager_vec<watcher> &queue);
95
45public: 96public:
46
47 void reschedule_time_watchers ();
48
49 // register a watcher 97 // register a watcher
50 void reg (io_watcher *w); 98#if IOM_IO
51 void unreg (io_watcher *w); 99 void reg (io_watcher *w); void unreg (io_watcher *w);
52 void reg (time_watcher *w); 100#endif
53 void unreg (time_watcher *w); 101#if IOM_TIME
102 void reg (time_watcher *w); void unreg (time_watcher *w);
103#endif
104#if IOM_CHECK
105 void reg (check_watcher *w); void unreg (check_watcher *w);
106#endif
107#if IOM_IDLE
108 void reg (idle_watcher *w); void unreg (idle_watcher *w);
109#endif
54 110
55 void loop (); 111 void loop ();
56 112
57 io_manager (); 113 io_manager ();
58 ~io_manager (); 114 ~io_manager ();
59}; 115};
60 116
61extern io_manager iom; // a singleton, together with it's construction/destruction problems. 117extern io_manager iom; // a singleton, together with it's construction/destruction problems.
62 118
119struct watcher {
120 int active; /* 0 == inactive, else index into respective vector */
121
122 watcher() : active(0) { }
123};
124
125#if IOM_IO
126enum { EVENT_READ = 1, EVENT_WRITE = 2 };
127
63struct io_watcher : callback2<void, io_watcher &, short> { 128struct io_watcher : watcher, callback2<void, io_watcher &, short> {
64 bool registered; // already registered?
65 int fd; 129 int fd;
66 short events; 130 short events;
67 131
132 void set (int fd_, short events_) { fd = fd_; events = events_; }
133
134 void set (short events_) { set (fd, events_); }
135 void start () { iom.reg (this); }
136 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); }
137 void stop () { iom.unreg (this); }
138
68 template<class O1, class O2> 139 template<class O1, class O2>
69 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 140 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short))
70 : callback2<void, io_watcher &, short>(object,method) 141 : callback2<void, io_watcher &, short>(object,method)
71 , registered(false)
72 { } 142 { }
143 ~io_watcher () { stop (); }
144};
145#endif
73 146
74 ~io_watcher (); 147#if IOM_TIME
148struct time_watcher : watcher, callback1<void, time_watcher &> {
149 tstamp at;
75 150
76 void set(int fd_, short events_); 151 void trigger ();
77 152
78 void set(short events_) 153 void set (tstamp when) { at = when; }
79 { 154 void operator ()() { trigger (); }
80 set (fd, events_); 155 void start () { iom.reg (this); }
81 } 156 void start (tstamp when) { set (when); iom.reg (this); }
82 157 void stop () { iom.unreg (this); }
83 void start (int fd_, short events_)
84 {
85 set (fd_, events_);
86 iom.reg (this);
87 }
88
89 void stop ()
90 {
91 iom.unreg (this);
92 }
93};
94
95#define TSTAMP_CANCEL -1.
96
97struct time_watcher : callback1<void, time_watcher &> {
98 bool registered; // already registered?
99 tstamp at;
100 158
101 template<class O1, class O2> 159 template<class O1, class O2>
102 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 160 time_watcher (O1 *object, void (O2::*method)(time_watcher &))
103 : callback1<void, time_watcher &>(object,method) 161 : callback1<void, time_watcher &>(object,method)
104 , registered(false) 162 { }
163 ~time_watcher () { stop (); }
164};
165#endif
166
167#if IOM_CHECK
168// run before checking for new events
169struct check_watcher : watcher, callback1<void, check_watcher &> {
170 void start () { iom.reg (this); }
171 void stop () { iom.unreg (this); }
172
173 template<class O1, class O2>
174 check_watcher (O1 *object, void (O2::*method)(check_watcher &))
175 : callback1<void, check_watcher &>(object,method)
176 { }
177 ~check_watcher () { stop (); }
178};
179#endif
180
181#if IOM_IDLE
182// run after checking for any i/o, but before waiting
183struct idle_watcher : watcher, callback1<void, idle_watcher &> {
184 void start () { iom.reg (this); }
185 void stop () { iom.unreg (this); }
186
187 template<class O1, class O2>
188 idle_watcher (O1 *object, void (O2::*method)(idle_watcher &))
189 : callback1<void, idle_watcher &>(object,method)
105 { } 190 { }
106 191 ~idle_watcher () { stop (); }
107 ~time_watcher ();
108
109 void set (tstamp when);
110 void trigger ();
111
112 void operator ()()
113 {
114 trigger ();
115 }
116
117 void start ()
118 {
119 iom.reg (this);
120 }
121
122 void start (tstamp when)
123 {
124 set (when);
125 iom.reg (this);
126 }
127
128 void stop ()
129 {
130 iom.unreg (this);
131 }
132
133 void reset (tstamp when = TSTAMP_CANCEL)
134 {
135 stop ();
136 at = when;
137 }
138}; 192};
193#endif
139 194
140#endif 195#endif
141 196

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