1 |
pcg |
1.1 |
/* |
2 |
root |
1.20 |
iom.h -- generic I/O multiplexer |
3 |
root |
1.23 |
Copyright (C) 2003, 2004 Marc Lehmann <gvpe@schmorp.de> |
4 |
pcg |
1.1 |
|
5 |
root |
1.23 |
This file is part of GVPE. |
6 |
|
|
|
7 |
|
|
GVPE is free software; you can redistribute it and/or modify |
8 |
pcg |
1.1 |
it under the terms of the GNU General Public License as published by |
9 |
|
|
the Free Software Foundation; either version 2 of the License, or |
10 |
|
|
(at your option) any later version. |
11 |
|
|
|
12 |
|
|
This program is distributed in the hope that it will be useful, |
13 |
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 |
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 |
|
|
GNU General Public License for more details. |
16 |
|
|
|
17 |
|
|
You should have received a copy of the GNU General Public License |
18 |
root |
1.23 |
along with gvpe; if not, write to the Free Software |
19 |
root |
1.22 |
Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 |
pcg |
1.1 |
*/ |
21 |
|
|
|
22 |
pcg |
1.7 |
#ifndef IOM_H__ |
23 |
|
|
#define IOM_H__ |
24 |
pcg |
1.1 |
|
25 |
pcg |
1.7 |
// required: |
26 |
|
|
// - a vector template like simplevec or stl's vector |
27 |
|
|
// - defines for all watcher types required in your app |
28 |
|
|
// edit iom_conf.h as appropriate. |
29 |
|
|
#include "iom_conf.h" |
30 |
pcg |
1.1 |
|
31 |
pcg |
1.6 |
#include "callback.h" |
32 |
pcg |
1.1 |
|
33 |
pcg |
1.6 |
#ifndef IOM_IO |
34 |
pcg |
1.7 |
# define IOM_IO 0 |
35 |
pcg |
1.6 |
#endif |
36 |
|
|
#ifndef IOM_TIME |
37 |
pcg |
1.7 |
# define IOM_TIME 0 |
38 |
pcg |
1.6 |
#endif |
39 |
|
|
#ifndef IOM_CHECK |
40 |
pcg |
1.7 |
# define IOM_CHECK 0 |
41 |
pcg |
1.6 |
#endif |
42 |
|
|
#ifndef IOM_IDLE |
43 |
|
|
# define IOM_IDLE 0 |
44 |
|
|
#endif |
45 |
pcg |
1.12 |
#ifndef IOM_SIG |
46 |
|
|
# define IOM_SIG 0 |
47 |
|
|
#endif |
48 |
pcg |
1.6 |
|
49 |
|
|
typedef double tstamp; |
50 |
|
|
extern tstamp NOW; |
51 |
pcg |
1.2 |
|
52 |
root |
1.23 |
// TSTAMP_MAX must still fit into a positive struct timeval |
53 |
|
|
#define TSTAMP_MAX (double)(1UL<<31) |
54 |
|
|
|
55 |
pcg |
1.7 |
struct watcher; |
56 |
pcg |
1.2 |
#if IOM_IO |
57 |
pcg |
1.7 |
struct io_watcher; |
58 |
pcg |
1.2 |
#endif |
59 |
|
|
#if IOM_TIME |
60 |
pcg |
1.7 |
struct time_watcher; |
61 |
pcg |
1.2 |
#endif |
62 |
|
|
#if IOM_CHECK |
63 |
pcg |
1.7 |
struct check_watcher; |
64 |
pcg |
1.2 |
#endif |
65 |
pcg |
1.5 |
#if IOM_IDLE |
66 |
pcg |
1.7 |
struct idle_watcher; |
67 |
pcg |
1.5 |
#endif |
68 |
pcg |
1.12 |
#if IOM_SIG |
69 |
|
|
struct sig_watcher; |
70 |
|
|
#endif |
71 |
pcg |
1.1 |
|
72 |
pcg |
1.6 |
template<class watcher> |
73 |
pcg |
1.10 |
struct io_manager_vec : vector<watcher *> { |
74 |
pcg |
1.6 |
void erase_unordered (unsigned int pos) |
75 |
|
|
{ |
76 |
root |
1.13 |
watcher *w = (*this)[this->size () - 1]; |
77 |
|
|
this->pop_back (); |
78 |
pcg |
1.6 |
|
79 |
root |
1.20 |
if (!this->empty ()) |
80 |
|
|
if (((*this)[pos] = w)) // '=' is correct! |
81 |
pcg |
1.6 |
w->active = pos + 1; |
82 |
|
|
} |
83 |
|
|
}; |
84 |
|
|
|
85 |
root |
1.15 |
// only used as a namespace, and for initialisation purposes |
86 |
pcg |
1.2 |
class io_manager { |
87 |
|
|
template<class watcher> |
88 |
root |
1.15 |
static void reg (watcher &w, io_manager_vec<watcher> &queue); |
89 |
pcg |
1.1 |
|
90 |
pcg |
1.2 |
template<class watcher> |
91 |
root |
1.15 |
static void unreg (watcher &w, io_manager_vec<watcher> &queue); |
92 |
pcg |
1.1 |
|
93 |
|
|
public: |
94 |
root |
1.21 |
#if IOM_TIME |
95 |
|
|
// fetch time only |
96 |
|
|
static tstamp now (); |
97 |
|
|
|
98 |
|
|
// set NOW |
99 |
|
|
static void set_now (); |
100 |
|
|
#endif |
101 |
|
|
|
102 |
pcg |
1.1 |
// register a watcher |
103 |
pcg |
1.2 |
#if IOM_IO |
104 |
root |
1.15 |
static void reg (io_watcher &w); static void unreg (io_watcher &w); |
105 |
pcg |
1.2 |
#endif |
106 |
|
|
#if IOM_TIME |
107 |
root |
1.15 |
static void reg (time_watcher &w); static void unreg (time_watcher &w); |
108 |
pcg |
1.2 |
#endif |
109 |
|
|
#if IOM_CHECK |
110 |
root |
1.15 |
static void reg (check_watcher &w); static void unreg (check_watcher &w); |
111 |
pcg |
1.2 |
#endif |
112 |
pcg |
1.5 |
#if IOM_IDLE |
113 |
root |
1.15 |
static void reg (idle_watcher &w); static void unreg (idle_watcher &w); |
114 |
pcg |
1.5 |
#endif |
115 |
pcg |
1.12 |
#if IOM_SIG |
116 |
root |
1.15 |
static void reg (sig_watcher &w); static void unreg (sig_watcher &w); |
117 |
pcg |
1.12 |
#endif |
118 |
pcg |
1.1 |
|
119 |
root |
1.15 |
static void loop (); |
120 |
pcg |
1.1 |
}; |
121 |
|
|
|
122 |
pcg |
1.6 |
struct watcher { |
123 |
|
|
int active; /* 0 == inactive, else index into respective vector */ |
124 |
|
|
|
125 |
pcg |
1.11 |
watcher () : active (0) { } |
126 |
pcg |
1.6 |
}; |
127 |
|
|
|
128 |
pcg |
1.2 |
#if IOM_IO |
129 |
pcg |
1.1 |
enum { EVENT_READ = 1, EVENT_WRITE = 2 }; |
130 |
|
|
|
131 |
pcg |
1.6 |
struct io_watcher : watcher, callback2<void, io_watcher &, short> { |
132 |
pcg |
1.1 |
int fd; |
133 |
|
|
short events; |
134 |
|
|
|
135 |
pcg |
1.5 |
void set (int fd_, short events_) { fd = fd_; events = events_; } |
136 |
pcg |
1.1 |
|
137 |
pcg |
1.5 |
void set (short events_) { set (fd, events_); } |
138 |
root |
1.15 |
void start () { io_manager::reg (*this); } |
139 |
|
|
void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); } |
140 |
|
|
void stop () { io_manager::unreg (*this); } |
141 |
pcg |
1.6 |
|
142 |
|
|
template<class O1, class O2> |
143 |
pcg |
1.11 |
io_watcher (O1 *object, void (O2::*method) (io_watcher &, short)) |
144 |
|
|
: callback2<void, io_watcher &, short> (object,method) |
145 |
pcg |
1.6 |
{ } |
146 |
|
|
~io_watcher () { stop (); } |
147 |
pcg |
1.1 |
}; |
148 |
pcg |
1.2 |
#endif |
149 |
pcg |
1.1 |
|
150 |
pcg |
1.2 |
#if IOM_TIME |
151 |
pcg |
1.6 |
struct time_watcher : watcher, callback1<void, time_watcher &> { |
152 |
pcg |
1.1 |
tstamp at; |
153 |
|
|
|
154 |
|
|
void trigger (); |
155 |
|
|
|
156 |
|
|
void set (tstamp when) { at = when; } |
157 |
pcg |
1.11 |
void operator () () { trigger (); } |
158 |
root |
1.15 |
void start () { io_manager::reg (*this); } |
159 |
|
|
void start (tstamp when) { set (when); io_manager::reg (*this); } |
160 |
|
|
void stop () { io_manager::unreg (*this); } |
161 |
pcg |
1.1 |
|
162 |
pcg |
1.6 |
template<class O1, class O2> |
163 |
pcg |
1.11 |
time_watcher (O1 *object, void (O2::*method) (time_watcher &)) |
164 |
|
|
: callback1<void, time_watcher &> (object,method), at (0) |
165 |
pcg |
1.6 |
{ } |
166 |
|
|
~time_watcher () { stop (); } |
167 |
pcg |
1.1 |
}; |
168 |
pcg |
1.2 |
#endif |
169 |
|
|
|
170 |
|
|
#if IOM_CHECK |
171 |
|
|
// run before checking for new events |
172 |
pcg |
1.6 |
struct check_watcher : watcher, callback1<void, check_watcher &> { |
173 |
root |
1.15 |
void start () { io_manager::reg (*this); } |
174 |
|
|
void stop () { io_manager::unreg (*this); } |
175 |
pcg |
1.6 |
|
176 |
pcg |
1.2 |
template<class O1, class O2> |
177 |
pcg |
1.11 |
check_watcher (O1 *object, void (O2::*method) (check_watcher &)) |
178 |
|
|
: callback1<void, check_watcher &> (object,method) |
179 |
pcg |
1.6 |
{ } |
180 |
|
|
~check_watcher () { stop (); } |
181 |
pcg |
1.5 |
}; |
182 |
|
|
#endif |
183 |
|
|
|
184 |
|
|
#if IOM_IDLE |
185 |
|
|
// run after checking for any i/o, but before waiting |
186 |
pcg |
1.6 |
struct idle_watcher : watcher, callback1<void, idle_watcher &> { |
187 |
root |
1.15 |
void start () { io_manager::reg (*this); } |
188 |
|
|
void stop () { io_manager::unreg (*this); } |
189 |
pcg |
1.6 |
|
190 |
pcg |
1.5 |
template<class O1, class O2> |
191 |
pcg |
1.11 |
idle_watcher (O1 *object, void (O2::*method) (idle_watcher &)) |
192 |
|
|
: callback1<void, idle_watcher &> (object,method) |
193 |
pcg |
1.5 |
{ } |
194 |
pcg |
1.6 |
~idle_watcher () { stop (); } |
195 |
pcg |
1.2 |
}; |
196 |
|
|
#endif |
197 |
pcg |
1.1 |
|
198 |
pcg |
1.12 |
#if IOM_SIG |
199 |
|
|
struct sig_watcher : watcher, callback1<void, sig_watcher &> { |
200 |
|
|
int signum; |
201 |
|
|
|
202 |
|
|
void start (int signum); |
203 |
root |
1.15 |
void stop () { io_manager::unreg (*this); } |
204 |
pcg |
1.12 |
|
205 |
|
|
template<class O1, class O2> |
206 |
|
|
sig_watcher (O1 *object, void (O2::*method) (sig_watcher &)) |
207 |
|
|
: callback1<void, sig_watcher &> (object,method), signum (-1) |
208 |
|
|
{ } |
209 |
|
|
~sig_watcher () { stop (); } |
210 |
|
|
}; |
211 |
|
|
#endif |
212 |
|
|
|
213 |
pcg |
1.1 |
#endif |
214 |
|
|
|