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Comparing gvpe/src/iom.h (file contents):
Revision 1.13 by pcg, Tue Oct 14 17:24:19 2003 UTC vs.
Revision 1.18 by pcg, Sun Mar 21 12:50:05 2004 UTC

1/* 1/*
2 iom.h -- I/O multiplexor 2 iom.h -- generic I/O multiplexor
3 Copyright (C) 2003, 2004 Marc Lehmann <pcg@goof.com>
3 4
4 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
5 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
6 the Free Software Foundation; either version 2 of the License, or 7 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version. 8 (at your option) any later version.
… …
14 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
15 along with this program; if not, write to the Free Software 16 along with this program; if not, write to the Free Software
16 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
17*/ 18*/
18 19
19#ifndef VPE_IOM_H__ 20#ifndef IOM_H__
20#define VPE_IOM_H__ 21#define IOM_H__
21 22
22#include <vector> 23// required:
23 24// - a vector template like simplevec or stl's vector
24#include <cassert> 25// - defines for all watcher types required in your app
25 26// edit iom_conf.h as appropriate.
26#include "poll.h" 27#include "iom_conf.h"
27 28
28#include "callback.h" 29#include "callback.h"
29#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
30 43
31typedef double tstamp; 44typedef double tstamp;
32
33extern tstamp NOW; 45extern tstamp NOW;
34 46
47struct watcher;
48#if IOM_IO
35struct io_watcher; 49struct io_watcher;
50#endif
51#if IOM_TIME
36struct 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 : vector<watcher *> {
63#if IOM_CHECK
64 bool activity;
65#endif
66
67 void erase_unordered (unsigned int pos)
68 {
69 watcher *w = (*this)[size () - 1];
70 pop_back ();
71
72 if (size ())
73 if ((*this)[pos] = w)
74 w->active = pos + 1;
75 }
76};
37 77
38class io_manager { 78class io_manager {
39 vector<pollfd> pfs; 79#if IOM_IO
40 vector<io_watcher *> iow; 80 io_manager_vec<io_watcher> iow;
41 vector<time_watcher *> tw; // actually a heap 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
42 91
43 void idle_cb (time_watcher &w); time_watcher *idle; 92 template<class watcher>
93 void reg (watcher *w, io_manager_vec<watcher> &queue);
94
95 template<class watcher>
96 void unreg (watcher *w, io_manager_vec<watcher> &queue);
97
44public: 98public:
45
46 void reschedule_time_watchers ();
47
48 // register a watcher 99 // register a watcher
49 void reg (io_watcher *w); 100#if IOM_IO
50 void unreg (io_watcher *w); 101 void reg (io_watcher *w); void unreg (io_watcher *w);
51 void reg (time_watcher *w); 102#endif
52 void unreg (time_watcher *w); 103#if IOM_TIME
104 void reg (time_watcher *w); void unreg (time_watcher *w);
105#endif
106#if IOM_CHECK
107 void reg (check_watcher *w); void unreg (check_watcher *w);
108#endif
109#if IOM_IDLE
110 void reg (idle_watcher *w); void unreg (idle_watcher *w);
111#endif
53 112
54 void loop (); 113 void loop ();
55 114
56 io_manager (); 115 io_manager ();
57 ~io_manager (); 116 ~io_manager ();
58}; 117};
59 118
60extern io_manager iom; // a singleton, together with it's construction/destruction problems. 119extern io_manager iom; // a singleton, together with it's construction/destruction problems.
61 120
121struct watcher {
122 int active; /* 0 == inactive, else index into respective vector */
123
124 watcher() : active(0) { }
125};
126
127#if IOM_IO
128enum { EVENT_READ = 1, EVENT_WRITE = 2 };
129
62struct io_watcher : callback2<void, io_watcher &, short> { 130struct io_watcher : watcher, callback2<void, io_watcher &, short> {
63 bool registered; // already registered?
64 int fd; 131 int fd;
65 short events; 132 short events;
66 133
134 void set (int fd_, short events_) { fd = fd_; events = events_; }
135
136 void set (short events_) { set (fd, events_); }
137 void start () { iom.reg (this); }
138 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); }
139 void stop () { iom.unreg (this); }
140
67 template<class O1, class O2> 141 template<class O1, class O2>
68 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 142 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short))
69 : callback2<void, io_watcher &, short>(object,method) 143 : callback2<void, io_watcher &, short>(object,method)
70 , registered(false)
71 { } 144 { }
145 ~io_watcher () { stop (); }
146};
147#endif
72 148
73 ~io_watcher (); 149#if IOM_TIME
150struct time_watcher : watcher, callback1<void, time_watcher &> {
151 tstamp at;
74 152
75 void set(int fd_, short events_); 153 void trigger ();
76 154
77 void set(short events_) 155 void set (tstamp when) { at = when; }
78 { 156 void operator ()() { trigger (); }
79 set (fd, events_); 157 void start () { iom.reg (this); }
80 } 158 void start (tstamp when) { set (when); iom.reg (this); }
81 159 void stop () { iom.unreg (this); }
82 void start (int fd_, short events_)
83 {
84 set (fd_, events_);
85 iom.reg (this);
86 }
87
88 void stop ()
89 {
90 iom.unreg (this);
91 }
92};
93
94#define TSTAMP_CANCEL -1.
95
96struct time_watcher : callback1<void, time_watcher &> {
97 bool registered; // already registered?
98 tstamp at;
99 160
100 template<class O1, class O2> 161 template<class O1, class O2>
101 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 162 time_watcher (O1 *object, void (O2::*method)(time_watcher &))
163 : callback1<void, time_watcher &>(object,method), at(0)
164 { }
165 ~time_watcher () { stop (); }
166};
167#endif
168
169#if IOM_CHECK
170// run before checking for new events
171struct check_watcher : watcher, callback1<void, check_watcher &> {
172 void start () { iom.reg (this); }
173 void stop () { iom.unreg (this); }
174
175 template<class O1, class O2>
176 check_watcher (O1 *object, void (O2::*method)(check_watcher &))
177 : callback1<void, check_watcher &>(object,method)
178 { }
179 ~check_watcher () { stop (); }
180};
181#endif
182
183#if IOM_IDLE
184// run after checking for any i/o, but before waiting
185struct idle_watcher : watcher, callback1<void, idle_watcher &> {
186 void start () { iom.reg (this); }
187 void stop () { iom.unreg (this); }
188
189 template<class O1, class O2>
190 idle_watcher (O1 *object, void (O2::*method)(idle_watcher &))
102 : callback1<void, time_watcher &>(object,method) 191 : callback1<void, idle_watcher &>(object,method)
103 , registered(false)
104 { } 192 { }
105 193 ~idle_watcher () { stop (); }
106 ~time_watcher ();
107
108 void set (tstamp when);
109 void trigger ();
110
111 void operator ()()
112 {
113 trigger ();
114 }
115
116 void start ()
117 {
118 iom.reg (this);
119 }
120
121 void start (tstamp when)
122 {
123 set (when);
124 iom.reg (this);
125 }
126
127 void stop ()
128 {
129 iom.unreg (this);
130 }
131
132 void reset (tstamp when = TSTAMP_CANCEL)
133 {
134 stop ();
135 at = when;
136 }
137}; 194};
195#endif
138 196
139#endif 197#endif
140 198

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