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Comparing rxvt-unicode/src/iom.h (file contents):
Revision 1.6 by pcg, Fri Jan 16 22:11:09 2004 UTC vs.
Revision 1.27 by root, Thu Jan 19 20:30:36 2006 UTC

1/* 1/*
2 iom.h -- generic I/O multiplexor 2 iom.h -- generic I/O multiplexer
3 Copyright (C) 2003 Marc Lehmann <pcg@goof.com> 3 Copyright (C) 2003-2006 Marc Lehmann <gvpe@schmorp.de>
4 4
5 This file is part of GVPE.
6
5 This program is free software; you can redistribute it and/or modify 7 GVPE is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by 8 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 9 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version. 10 (at your option) any later version.
9 11
10 This program is distributed in the hope that it will be useful, 12 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details. 15 GNU General Public License for more details.
14 16
15 You should have received a copy of the GNU General Public License 17 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software 18 along with gvpe; if not, write to the Free Software
17 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18*/ 20*/
19 21
20#ifndef VPE_IOM_H__ 22#ifndef IOM_H__
21#define VPE_IOM_H__ 23#define IOM_H__
22 24
23#include <cassert> 25// 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
31#if IOM_CHILD
32# undef IOM_SIG
33# define IOM_SIG 1
34#endif
24 35
25#include "callback.h" 36#include "callback.h"
26#include "rxvtvec.h"
27
28#ifndef IOM_IO
29# define IOM_IO 1
30#endif
31#ifndef IOM_TIME
32# define IOM_TIME 1
33#endif
34#ifndef IOM_CHECK
35# define IOM_CHECK 1
36#endif
37#ifndef IOM_IDLE
38# define IOM_IDLE 0
39#endif
40 37
41typedef double tstamp; 38typedef double tstamp;
42extern tstamp NOW; 39extern tstamp NOW;
43 40
41// TSTAMP_MAX must still fit into a positive struct timeval
42#define TSTAMP_MAX (double)(1UL<<31)
43
44struct watcher;
44#if IOM_IO 45#if IOM_IO
45 struct io_watcher; 46struct io_watcher;
46#endif 47#endif
47#if IOM_TIME 48#if IOM_TIME
48 struct time_watcher; 49struct time_watcher;
49#endif 50#endif
50#if IOM_CHECK 51#if IOM_CHECK
51 struct check_watcher; 52struct check_watcher;
52#endif 53#endif
53#if IOM_IDLE 54#if IOM_IDLE
54 struct idle_watcher; 55struct idle_watcher;
56#endif
57#if IOM_SIG
58struct sig_watcher;
59#endif
60#if IOM_CHILD
61struct child_watcher;
55#endif 62#endif
56 63
57template<class watcher> 64template<class watcher>
58struct io_manager_vec : protected simplevec<watcher *> { 65struct io_manager_vec : vector<watcher *> {
59 friend class io_manager;
60protected:
61 void erase_unordered (unsigned int pos) 66 void erase_unordered (unsigned int pos)
62 { 67 {
63 watcher *w = (*this)[size () - 1]; 68 watcher *w = (*this)[this->size () - 1];
64 pop_back (); 69 this->pop_back ();
65 70
66 if (size ()) 71 if (!this->empty ())
67 if ((*this)[pos] = w) 72 if (((*this)[pos] = w)) // '=' is correct!
68 w->active = pos + 1; 73 w->active = pos + 1;
69 } 74 }
70}; 75};
71 76
77// only used as a namespace, and for initialisation purposes
72class io_manager { 78class io_manager {
73#if IOM_IO
74 io_manager_vec<io_watcher> iow;
75#endif
76#if IOM_CHECK
77 io_manager_vec<check_watcher> cw;
78#endif
79#if IOM_TIME
80 io_manager_vec<time_watcher> tw;
81#endif
82#if IOM_IDLE
83 io_manager_vec<idle_watcher> iw;
84#endif
85
86 template<class watcher> 79 template<class watcher>
87 void reg (watcher *w, simplevec<watcher *> &queue); 80 static void reg (watcher &w, io_manager_vec<watcher> &queue);
88 81
89 template<class watcher> 82 template<class watcher>
90 void unreg (watcher *w, simplevec<watcher *> &queue); 83 static void unreg (watcher &w, io_manager_vec<watcher> &queue);
91 84
92public: 85public:
86#if IOM_TIME
87 // fetch time only
88 static tstamp now ();
89
90 // set NOW
91 static void set_now ();
92#endif
93
93 // register a watcher 94 // register a watcher
94#if IOM_IO 95#if IOM_IO
95 void reg (io_watcher *w); void unreg (io_watcher *w); 96 static void reg (io_watcher &w); static void unreg (io_watcher &w);
96#endif 97#endif
97#if IOM_TIME 98#if IOM_TIME
98 void reg (time_watcher *w); void unreg (time_watcher *w); 99 static void reg (time_watcher &w); static void unreg (time_watcher &w);
99#endif 100#endif
100#if IOM_CHECK 101#if IOM_CHECK
101 void reg (check_watcher *w); void unreg (check_watcher *w); 102 static void reg (check_watcher &w); static void unreg (check_watcher &w);
102#endif 103#endif
103#if IOM_IDLE 104#if IOM_IDLE
104 void reg (idle_watcher *w); void unreg (idle_watcher *w); 105 static void reg (idle_watcher &w); static void unreg (idle_watcher &w);
106#endif
107#if IOM_SIG
108 static void reg (sig_watcher &w); static void unreg (sig_watcher &w);
109#endif
110#if IOM_CHILD
111 static void reg (child_watcher &w); static void unreg (child_watcher &w);
105#endif 112#endif
106 113
107 void loop (); 114 static void loop ();
108
109 io_manager ();
110 ~io_manager ();
111}; 115};
112
113extern io_manager iom; // a singleton, together with it's construction/destruction problems.
114 116
115struct watcher { 117struct watcher {
116 int active; /* 0 == inactive, else index into respective vector */ 118 int active; /* 0 == inactive, else index into respective vector */
117 119
120 bool is_active () { return active; }
121
118 watcher() : active(0) { } 122 watcher () : active (0) { }
119}; 123};
120 124
121#if IOM_IO 125#if IOM_IO
122enum { EVENT_READ = 1, EVENT_WRITE = 2 }; 126enum { EVENT_UNDEF = -1, EVENT_NONE = 0, EVENT_READ = 1, EVENT_WRITE = 2 };
123 127
124struct io_watcher : watcher, callback2<void, io_watcher &, short> { 128struct io_watcher : watcher, callback2<void, io_watcher &, short> {
125 int fd; 129 int fd;
126 short events; 130 short events;
127 131
128 void set (int fd_, short events_) { fd = fd_; events = events_; } 132 void set (int fd_, short events_) { fd = fd_; events = events_; }
129 133
130 void set (short events_) { set (fd, events_); } 134 void set (short events_) { set (fd, events_); }
131 void start () { iom.reg (this); } 135 void start () { io_manager::reg (*this); }
132 void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } 136 void start (int fd_, short events_) { set (fd_, events_); io_manager::reg (*this); }
133 void stop () { iom.unreg (this); } 137 void stop () { io_manager::unreg (*this); }
134 138
135 template<class O1, class O2> 139 template<class O1, class O2>
136 io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) 140 io_watcher (O1 *object, void (O2::*method) (io_watcher &, short))
137 : callback2<void, io_watcher &, short>(object,method) 141 : callback2<void, io_watcher &, short> (object, method)
138 { } 142 { }
139 ~io_watcher () { stop (); } 143 ~io_watcher () { stop (); }
140}; 144};
141#endif 145#endif
142 146
… …
145 tstamp at; 149 tstamp at;
146 150
147 void trigger (); 151 void trigger ();
148 152
149 void set (tstamp when) { at = when; } 153 void set (tstamp when) { at = when; }
150 void operator ()() { trigger (); } 154 void operator () () { trigger (); }
151 void start () { iom.reg (this); } 155 void start () { io_manager::reg (*this); }
152 void start (tstamp when) { set (when); iom.reg (this); } 156 void start (tstamp when) { set (when); io_manager::reg (*this); }
153 void stop () { iom.unreg (this); } 157 void stop () { io_manager::unreg (*this); }
154 158
155 template<class O1, class O2> 159 template<class O1, class O2>
156 time_watcher (O1 *object, void (O2::*method)(time_watcher &)) 160 time_watcher (O1 *object, void (O2::*method) (time_watcher &))
157 : callback1<void, time_watcher &>(object,method) 161 : callback1<void, time_watcher &> (object, method), at (0)
158 { } 162 { }
159 ~time_watcher () { stop (); } 163 ~time_watcher () { stop (); }
160}; 164};
161#endif 165#endif
162 166
163#if IOM_CHECK 167#if IOM_CHECK
164// run before checking for new events 168// run before checking for new events
165struct check_watcher : watcher, callback1<void, check_watcher &> { 169struct check_watcher : watcher, callback1<void, check_watcher &> {
166 void start () { iom.reg (this); } 170 void start () { io_manager::reg (*this); }
167 void stop () { iom.unreg (this); } 171 void stop () { io_manager::unreg (*this); }
168 172
169 template<class O1, class O2> 173 template<class O1, class O2>
170 check_watcher (O1 *object, void (O2::*method)(check_watcher &)) 174 check_watcher (O1 *object, void (O2::*method) (check_watcher &))
171 : callback1<void, check_watcher &>(object,method) 175 : callback1<void, check_watcher &> (object, method)
172 { } 176 { }
173 ~check_watcher () { stop (); } 177 ~check_watcher () { stop (); }
174}; 178};
175#endif 179#endif
176 180
177#if IOM_IDLE 181#if IOM_IDLE
178// run after checking for any i/o, but before waiting 182// run after checking for any i/o, but before waiting
179struct idle_watcher : watcher, callback1<void, idle_watcher &> { 183struct idle_watcher : watcher, callback1<void, idle_watcher &> {
180 void start () { iom.reg (this); } 184 void start () { io_manager::reg (*this); }
181 void stop () { iom.unreg (this); } 185 void stop () { io_manager::unreg (*this); }
182 186
183 template<class O1, class O2> 187 template<class O1, class O2>
184 idle_watcher (O1 *object, void (O2::*method)(idle_watcher &)) 188 idle_watcher (O1 *object, void (O2::*method) (idle_watcher &))
185 : callback1<void, idle_watcher &>(object,method) 189 : callback1<void, idle_watcher &> (object, method)
186 { } 190 { }
187 ~idle_watcher () { stop (); } 191 ~idle_watcher () { stop (); }
188}; 192};
189#endif 193#endif
190 194
191#endif 195#if IOM_SIG
196struct sig_watcher : watcher, callback1<void, sig_watcher &> {
197 int signum;
192 198
199 void start (int signum);
200 void stop () { io_manager::unreg (*this); }
201
202 template<class O1, class O2>
203 sig_watcher (O1 *object, void (O2::*method) (sig_watcher &))
204 : callback1<void, sig_watcher &> (object, method), signum (0)
205 { }
206 ~sig_watcher () { stop (); }
207};
208#endif
209
210#if IOM_CHILD
211struct child_watcher : watcher, callback2<void, child_watcher &, int> {
212 int /*pid_t*/ pid;
213
214 void start (int pid) { this->pid = pid; io_manager::reg (*this); }
215 void stop () { io_manager::unreg (*this); }
216
217 template<class O1, class O2>
218 child_watcher (O1 *object, void (O2::*method) (child_watcher &, int status))
219 : callback2<void, child_watcher &, int> (object, method), pid (0)
220 { }
221 ~child_watcher () { stop (); }
222};
223#endif
224
225#endif
226

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