1 |
pcg |
1.1 |
/* |
2 |
|
|
iom.h -- generic I/O multiplexor |
3 |
pcg |
1.7 |
Copyright (C) 2003, 2004 Marc Lehmann <pcg@goof.com> |
4 |
pcg |
1.1 |
|
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 |
7 |
|
|
the Free Software Foundation; either version 2 of the License, or |
8 |
|
|
(at your option) any later version. |
9 |
|
|
|
10 |
|
|
This program is distributed in the hope that it will be useful, |
11 |
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 |
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 |
|
|
GNU General Public License for more details. |
14 |
|
|
|
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 |
17 |
|
|
Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 |
|
|
*/ |
19 |
|
|
|
20 |
pcg |
1.7 |
#ifndef IOM_H__ |
21 |
|
|
#define IOM_H__ |
22 |
pcg |
1.1 |
|
23 |
pcg |
1.7 |
// required: |
24 |
|
|
// - a vector template like simplevec or stl's vector |
25 |
|
|
// - defines for all watcher types required in your app |
26 |
|
|
// edit iom_conf.h as appropriate. |
27 |
|
|
#include "iom_conf.h" |
28 |
pcg |
1.1 |
|
29 |
pcg |
1.6 |
#include "callback.h" |
30 |
pcg |
1.1 |
|
31 |
pcg |
1.6 |
#ifndef IOM_IO |
32 |
pcg |
1.7 |
# define IOM_IO 0 |
33 |
pcg |
1.6 |
#endif |
34 |
|
|
#ifndef IOM_TIME |
35 |
pcg |
1.7 |
# define IOM_TIME 0 |
36 |
pcg |
1.6 |
#endif |
37 |
|
|
#ifndef IOM_CHECK |
38 |
pcg |
1.7 |
# define IOM_CHECK 0 |
39 |
pcg |
1.6 |
#endif |
40 |
|
|
#ifndef IOM_IDLE |
41 |
|
|
# define IOM_IDLE 0 |
42 |
|
|
#endif |
43 |
|
|
|
44 |
|
|
typedef double tstamp; |
45 |
|
|
extern tstamp NOW; |
46 |
pcg |
1.2 |
|
47 |
pcg |
1.7 |
struct watcher; |
48 |
pcg |
1.2 |
#if IOM_IO |
49 |
pcg |
1.7 |
struct io_watcher; |
50 |
pcg |
1.2 |
#endif |
51 |
|
|
#if IOM_TIME |
52 |
pcg |
1.7 |
struct time_watcher; |
53 |
pcg |
1.2 |
#endif |
54 |
|
|
#if IOM_CHECK |
55 |
pcg |
1.7 |
struct check_watcher; |
56 |
pcg |
1.2 |
#endif |
57 |
pcg |
1.5 |
#if IOM_IDLE |
58 |
pcg |
1.7 |
struct idle_watcher; |
59 |
pcg |
1.5 |
#endif |
60 |
pcg |
1.1 |
|
61 |
pcg |
1.6 |
template<class watcher> |
62 |
pcg |
1.10 |
struct io_manager_vec : vector<watcher *> { |
63 |
pcg |
1.9 |
#if IOM_CHECK |
64 |
|
|
bool activity; |
65 |
|
|
#endif |
66 |
|
|
|
67 |
pcg |
1.6 |
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 |
|
|
}; |
77 |
|
|
|
78 |
pcg |
1.2 |
class io_manager { |
79 |
|
|
#if IOM_IO |
80 |
pcg |
1.6 |
io_manager_vec<io_watcher> iow; |
81 |
pcg |
1.2 |
#endif |
82 |
|
|
#if IOM_CHECK |
83 |
pcg |
1.6 |
io_manager_vec<check_watcher> cw; |
84 |
pcg |
1.2 |
#endif |
85 |
|
|
#if IOM_TIME |
86 |
pcg |
1.6 |
io_manager_vec<time_watcher> tw; |
87 |
pcg |
1.2 |
#endif |
88 |
pcg |
1.5 |
#if IOM_IDLE |
89 |
pcg |
1.6 |
io_manager_vec<idle_watcher> iw; |
90 |
pcg |
1.5 |
#endif |
91 |
pcg |
1.1 |
|
92 |
pcg |
1.2 |
template<class watcher> |
93 |
pcg |
1.7 |
void reg (watcher *w, io_manager_vec<watcher> &queue); |
94 |
pcg |
1.1 |
|
95 |
pcg |
1.2 |
template<class watcher> |
96 |
pcg |
1.7 |
void unreg (watcher *w, io_manager_vec<watcher> &queue); |
97 |
pcg |
1.1 |
|
98 |
|
|
public: |
99 |
|
|
// register a watcher |
100 |
pcg |
1.2 |
#if IOM_IO |
101 |
pcg |
1.5 |
void reg (io_watcher *w); void unreg (io_watcher *w); |
102 |
pcg |
1.2 |
#endif |
103 |
|
|
#if IOM_TIME |
104 |
pcg |
1.5 |
void reg (time_watcher *w); void unreg (time_watcher *w); |
105 |
pcg |
1.2 |
#endif |
106 |
|
|
#if IOM_CHECK |
107 |
|
|
void reg (check_watcher *w); void unreg (check_watcher *w); |
108 |
|
|
#endif |
109 |
pcg |
1.5 |
#if IOM_IDLE |
110 |
|
|
void reg (idle_watcher *w); void unreg (idle_watcher *w); |
111 |
|
|
#endif |
112 |
pcg |
1.1 |
|
113 |
|
|
void loop (); |
114 |
|
|
|
115 |
|
|
io_manager (); |
116 |
|
|
~io_manager (); |
117 |
|
|
}; |
118 |
|
|
|
119 |
|
|
extern io_manager iom; // a singleton, together with it's construction/destruction problems. |
120 |
|
|
|
121 |
pcg |
1.6 |
struct watcher { |
122 |
|
|
int active; /* 0 == inactive, else index into respective vector */ |
123 |
|
|
|
124 |
|
|
watcher() : active(0) { } |
125 |
|
|
}; |
126 |
|
|
|
127 |
pcg |
1.2 |
#if IOM_IO |
128 |
pcg |
1.1 |
enum { EVENT_READ = 1, EVENT_WRITE = 2 }; |
129 |
|
|
|
130 |
pcg |
1.6 |
struct io_watcher : watcher, callback2<void, io_watcher &, short> { |
131 |
pcg |
1.1 |
int fd; |
132 |
|
|
short events; |
133 |
|
|
|
134 |
pcg |
1.5 |
void set (int fd_, short events_) { fd = fd_; events = events_; } |
135 |
pcg |
1.1 |
|
136 |
pcg |
1.5 |
void set (short events_) { set (fd, events_); } |
137 |
|
|
void start () { iom.reg (this); } |
138 |
pcg |
1.1 |
void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } |
139 |
|
|
void stop () { iom.unreg (this); } |
140 |
pcg |
1.6 |
|
141 |
|
|
template<class O1, class O2> |
142 |
|
|
io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) |
143 |
|
|
: callback2<void, io_watcher &, short>(object,method) |
144 |
|
|
{ } |
145 |
|
|
~io_watcher () { stop (); } |
146 |
pcg |
1.1 |
}; |
147 |
pcg |
1.2 |
#endif |
148 |
pcg |
1.1 |
|
149 |
pcg |
1.2 |
#if IOM_TIME |
150 |
pcg |
1.6 |
struct time_watcher : watcher, callback1<void, time_watcher &> { |
151 |
pcg |
1.1 |
tstamp at; |
152 |
|
|
|
153 |
|
|
void trigger (); |
154 |
|
|
|
155 |
|
|
void set (tstamp when) { at = when; } |
156 |
|
|
void operator ()() { trigger (); } |
157 |
|
|
void start () { iom.reg (this); } |
158 |
|
|
void start (tstamp when) { set (when); iom.reg (this); } |
159 |
|
|
void stop () { iom.unreg (this); } |
160 |
|
|
|
161 |
pcg |
1.6 |
template<class O1, class O2> |
162 |
|
|
time_watcher (O1 *object, void (O2::*method)(time_watcher &)) |
163 |
pcg |
1.8 |
: callback1<void, time_watcher &>(object,method), at(0) |
164 |
pcg |
1.6 |
{ } |
165 |
|
|
~time_watcher () { stop (); } |
166 |
pcg |
1.1 |
}; |
167 |
pcg |
1.2 |
#endif |
168 |
|
|
|
169 |
|
|
#if IOM_CHECK |
170 |
|
|
// run before checking for new events |
171 |
pcg |
1.6 |
struct check_watcher : watcher, callback1<void, check_watcher &> { |
172 |
|
|
void start () { iom.reg (this); } |
173 |
|
|
void stop () { iom.unreg (this); } |
174 |
|
|
|
175 |
pcg |
1.2 |
template<class O1, class O2> |
176 |
|
|
check_watcher (O1 *object, void (O2::*method)(check_watcher &)) |
177 |
pcg |
1.6 |
: callback1<void, check_watcher &>(object,method) |
178 |
|
|
{ } |
179 |
|
|
~check_watcher () { stop (); } |
180 |
pcg |
1.5 |
}; |
181 |
|
|
#endif |
182 |
|
|
|
183 |
|
|
#if IOM_IDLE |
184 |
|
|
// run after checking for any i/o, but before waiting |
185 |
pcg |
1.6 |
struct idle_watcher : watcher, callback1<void, idle_watcher &> { |
186 |
|
|
void start () { iom.reg (this); } |
187 |
|
|
void stop () { iom.unreg (this); } |
188 |
|
|
|
189 |
pcg |
1.5 |
template<class O1, class O2> |
190 |
|
|
idle_watcher (O1 *object, void (O2::*method)(idle_watcher &)) |
191 |
|
|
: callback1<void, idle_watcher &>(object,method) |
192 |
|
|
{ } |
193 |
pcg |
1.6 |
~idle_watcher () { stop (); } |
194 |
pcg |
1.2 |
}; |
195 |
|
|
#endif |
196 |
pcg |
1.1 |
|
197 |
|
|
#endif |
198 |
|
|
|