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Comparing gvpe/src/iom.h (file contents):
Revision 1.6 by pcg, Fri Mar 28 04:05:10 2003 UTC vs.
Revision 1.11 by pcg, Fri Apr 4 05:26:45 2003 UTC

… …
19#ifndef VPE_IOM_H__ 19#ifndef VPE_IOM_H__
20#define VPE_IOM_H__ 20#define VPE_IOM_H__
21 21
22#include <vector> 22#include <vector>
23 23
24#include <cassert>
25
24#include <sys/poll.h> 26#include <sys/poll.h>
25 27
28#include "callback.h"
26#include "slog.h" 29#include "slog.h"
27 30
28typedef double tstamp; 31typedef double tstamp;
29 32
30extern tstamp NOW; 33extern tstamp NOW;
31 34
32template<class R, class A> class callback;
33struct io_watcher; 35struct io_watcher;
34struct time_watcher; 36struct time_watcher;
35 37
36class io_manager { 38class io_manager {
37 vector<pollfd> pfs; 39 vector<pollfd> pfs;
38 vector<const io_watcher *> iow; 40 vector<io_watcher *> iow;
39 vector<time_watcher *> tw; // actually a heap 41 vector<time_watcher *> tw; // actually a heap
40 42
41 void idle_cb (tstamp &ts); time_watcher *idle; 43 void idle_cb (time_watcher &w); time_watcher *idle;
42public: 44public:
43 45
44 void reschedule_time_watchers (); 46 void reschedule_time_watchers ();
45 47
46 // register a watcher 48 // register a watcher
47 void reg (int fd, short events, io_watcher *w); 49 void reg (io_watcher *w);
48 void unreg (const io_watcher *w); 50 void unreg (io_watcher *w);
49 void reg (time_watcher *w); 51 void reg (time_watcher *w);
50 void unreg (const time_watcher *w); 52 void unreg (time_watcher *w);
51 53
52 void loop (); 54 void loop ();
53 55
54 io_manager (); 56 io_manager ();
55 ~io_manager (); 57 ~io_manager ();
56}; 58};
57 59
58extern io_manager iom; 60extern io_manager iom; // a singleton, together with it's construction/destruction problems.
59 61
60template<class R, class A> 62struct io_watcher : callback2<void, io_watcher &, short> {
61class callback { 63 pollfd *p;
62 struct object { };
63 64
64 void *obj; 65 template<class O1, class O2>
65 R (object::*meth)(A arg); 66 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short))
67 : callback2<void, io_watcher &, short>(object,method)
68 { }
66 69
67 // a proxy is a kind of recipe on how to call a specific class method 70 ~io_watcher ();
68 struct proxy_base {
69 virtual R call (void *obj, R (object::*meth)(A), A arg) = 0;
70 };
71 template<class O1, class O2>
72 struct proxy : proxy_base {
73 virtual R call (void *obj, R (object::*meth)(A), A arg)
74 {
75 ((reinterpret_cast<O1 *>(obj)) ->* (reinterpret_cast<R (O2::*)(A)>(meth)))
76 (arg);
77 }
78 };
79 71
80 proxy_base *prxy; 72 void set(int fd, short events)
81
82public:
83 template<class O1, class O2>
84 callback (O1 *object, R (O2::*method)(A))
85 { 73 {
86 static proxy<O1,O2> p; 74 assert (p);
87 obj = reinterpret_cast<void *>(object); 75 p->fd = fd;
88 meth = reinterpret_cast<R (object::*)(A)>(method); 76 p->events = events;
89 prxy = &p;
90 } 77 }
91 78
92 R call(A arg) const 79 void set(short events)
93 { 80 {
94 return prxy->call (obj, meth, arg); 81 assert (p);
95 } 82 p->events = events;
96
97 R operator ()(A arg) const
98 {
99 return call (arg);
100 }
101};
102
103struct io_watcher : callback<void, short> {
104 template<class O1, class O2>
105 io_watcher (O1 *object, void (O2::*method)(short revents))
106 : callback<void, short>(object,method)
107 { }
108
109 ~io_watcher ()
110 {
111 iom.unreg (this);
112 } 83 }
113 84
114 void start (int fd, short events) 85 void start (int fd, short events)
115 { 86 {
116 iom.reg (fd, events, this); 87 iom.reg (this); // make sure pfd is set
88
89 p->fd = fd;
90 p->events = events;
117 } 91 }
118 92
119 void stop () const 93 void stop ()
120 { 94 {
121 iom.unreg (this); 95 iom.unreg (this);
122 } 96 }
123}; 97};
124 98
125#define TSTAMP_CANCEL -1. 99#define TSTAMP_CANCEL -1.
126 100
127struct time_watcher : callback<void, tstamp &> { 101struct time_watcher : callback1<void, time_watcher &> {
128 bool registered; // already registered? 102 bool registered; // already registered?
129 tstamp at; 103 tstamp at;
130 104
131 template<class O1, class O2> 105 template<class O1, class O2>
132 time_watcher (O1 *object, void (O2::*method)(tstamp &)) 106 time_watcher (O1 *object, void (O2::*method)(time_watcher &))
133 : callback<void, tstamp &>(object,method) 107 : callback1<void, time_watcher &>(object,method)
134 , registered(false) 108 , registered(false)
135 { } 109 { }
136 110
137 ~time_watcher () 111 ~time_watcher ();
138 {
139 iom.unreg (this);
140 }
141 112
142 void set (tstamp when); 113 void set (tstamp when);
143 void trigger (); 114 void trigger ();
144 115
145 void operator ()() 116 void operator ()()
… …
151 void start (tstamp when) 122 void start (tstamp when)
152 { 123 {
153 set (when); 124 set (when);
154 } 125 }
155 126
156 void stop () const 127 void stop ()
157 { 128 {
158 iom.unreg (this); 129 iom.unreg (this);
159 } 130 }
160 131
161 void reset (tstamp when = TSTAMP_CANCEL) 132 void reset (tstamp when = TSTAMP_CANCEL)
162 { 133 {
163 stop (); 134 stop ();
135
164 at = when; 136 at = when;
165 } 137 }
166}; 138};
167 139
168#endif 140#endif

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