rxvt-unicode/src/iom.h

/*
    iom.h -- generic I/O multiplexor
    Copyright (C) 2003 Marc Lehmann <pcg@goof.com>
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef VPE_IOM_H__
#define VPE_IOM_H__

#include <cassert>

#include "rxvtvec.h"
#include "callback.h"

#define IOM_IO 1
#define IOM_TIME 1
#define IOM_CHECK 1
#define IOM_IDLE 0

#if IOM_IO
  typedef double tstamp;
  extern tstamp NOW;

  struct io_watcher;
#endif
#if IOM_TIME
  struct time_watcher;
#endif
#if IOM_CHECK
  struct check_watcher;
#endif
#if IOM_IDLE
  struct idle_watcher;
#endif

class io_manager {
#if IOM_IO
  simplevec<io_watcher *>    iow;
#endif
#if IOM_CHECK
  simplevec<check_watcher *> cw;
#endif
#if IOM_TIME
  simplevec<time_watcher *>  tw;
#endif
#if IOM_IDLE
  simplevec<idle_watcher *>  iw;
#endif

  template<class watcher>
  void reg (watcher *w, simplevec<watcher *> &queue);

  template<class watcher>
  void unreg (watcher *w, simplevec<watcher *> &queue);

public:
  // register a watcher
#if IOM_IO
  void reg (io_watcher    *w); void unreg (io_watcher    *w);
#endif
#if IOM_TIME
  void reg (time_watcher  *w); void unreg (time_watcher  *w);
#endif
#if IOM_CHECK
  void reg (check_watcher *w); void unreg (check_watcher *w);
#endif
#if IOM_IDLE
  void reg (idle_watcher  *w); void unreg (idle_watcher  *w);
#endif
  
  void loop ();

  io_manager ();
  ~io_manager ();
};

extern io_manager iom; // a singleton, together with it's construction/destruction problems.

#if IOM_IO
enum { EVENT_READ = 1, EVENT_WRITE = 2 };

struct io_watcher : callback2<void, io_watcher &, short> {
  int fd;
  short events;

  template<class O1, class O2>
  io_watcher (O1 *object, void (O2::*method)(io_watcher &, short))
    : callback2<void, io_watcher &, short>(object,method)
    { }

  ~io_watcher ();

  void set (int fd_, short events_) { fd = fd_; events = events_; }

  void set (short events_) { set (fd, events_); }
  void start () { iom.reg (this); }
  void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); }
  void stop () { iom.unreg (this); }
};
#endif

#if IOM_TIME
enum { TSTAMP_CANCEL = -1 };

struct time_watcher : callback1<void, time_watcher &> {
  tstamp at;

  template<class O1, class O2>
  time_watcher (O1 *object, void (O2::*method)(time_watcher &))
    : callback1<void, time_watcher &>(object,method)
    { }

  ~time_watcher ();

  void trigger ();

  void set (tstamp when) { at = when; }
  void operator ()() { trigger (); }
  void start () { iom.reg (this); }
  void start (tstamp when) { set (when); iom.reg (this); }
  void stop () { iom.unreg (this); }

  void reset (tstamp when = TSTAMP_CANCEL)
    {
      stop ();
      at = when;
    }
};
#endif

#if IOM_CHECK
// run before checking for new events
struct check_watcher : callback1<void, check_watcher &> {
  template<class O1, class O2>
  check_watcher (O1 *object, void (O2::*method)(check_watcher &))
    : callback1<void, check_watcher &>(object,method)
    { }

  ~check_watcher ();

  void start () { iom.reg (this); }
  void stop () { iom.unreg (this); }
};
#endif

#if IOM_IDLE
// run after checking for any i/o, but before waiting
struct idle_watcher : callback1<void, idle_watcher &> {
  template<class O1, class O2>
  idle_watcher (O1 *object, void (O2::*method)(idle_watcher &))
    : callback1<void, idle_watcher &>(object,method)
    { }

  ~idle_watcher ();

  void start () { iom.reg (this); }
  void stop () { iom.unreg (this); }
};
#endif

#endif

Revision:	1.5
Committed:	Fri Dec 19 06:17:03 2003 UTC (20 years, 5 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-1-3, rel-1-2
Changes since 1.4:	+30 -4 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	/*
2			iom.h -- generic I/O multiplexor
3			Copyright (C) 2003 Marc Lehmann <pcg@goof.com>
4
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			#ifndef VPE_IOM_H__
21			#define VPE_IOM_H__
22
23			#include <cassert>
24
25			#include "rxvtvec.h"
26			#include "callback.h"
27
28	pcg	1.2	#define IOM_IO 1
29			#define IOM_TIME 1
30	pcg	1.4	#define IOM_CHECK 1
31	pcg	1.5	#define IOM_IDLE 0
32	pcg	1.2
33			#if IOM_IO
34			typedef double tstamp;
35			extern tstamp NOW;
36
37			struct io_watcher;
38			#endif
39			#if IOM_TIME
40			struct time_watcher;
41			#endif
42			#if IOM_CHECK
43			struct check_watcher;
44			#endif
45	pcg	1.5	#if IOM_IDLE
46			struct idle_watcher;
47			#endif
48	pcg	1.1
49	pcg	1.2	class io_manager {
50			#if IOM_IO
51			simplevec<io_watcher *> iow;
52			#endif
53			#if IOM_CHECK
54			simplevec<check_watcher *> cw;
55			#endif
56			#if IOM_TIME
57			simplevec<time_watcher *> tw;
58			#endif
59	pcg	1.5	#if IOM_IDLE
60			simplevec<idle_watcher *> iw;
61			#endif
62	pcg	1.1
63	pcg	1.2	template<class watcher>
64			void reg (watcher w, simplevec<watcher > &queue);
65	pcg	1.1
66	pcg	1.2	template<class watcher>
67			void unreg (watcher w, simplevec<watcher > &queue);
68	pcg	1.1
69			public:
70			// register a watcher
71	pcg	1.2	#if IOM_IO
72	pcg	1.5	void reg (io_watcher w); void unreg (io_watcher w);
73	pcg	1.2	#endif
74			#if IOM_TIME
75	pcg	1.5	void reg (time_watcher w); void unreg (time_watcher w);
76	pcg	1.2	#endif
77			#if IOM_CHECK
78			void reg (check_watcher w); void unreg (check_watcher w);
79			#endif
80	pcg	1.5	#if IOM_IDLE
81			void reg (idle_watcher w); void unreg (idle_watcher w);
82			#endif
83	pcg	1.1
84			void loop ();
85
86			io_manager ();
87			~io_manager ();
88			};
89
90			extern io_manager iom; // a singleton, together with it's construction/destruction problems.
91
92	pcg	1.2	#if IOM_IO
93	pcg	1.1	enum { EVENT_READ = 1, EVENT_WRITE = 2 };
94
95			struct io_watcher : callback2<void, io_watcher &, short> {
96			int fd;
97			short events;
98
99			template<class O1, class O2>
100			io_watcher (O1 object, void (O2::method)(io_watcher &, short))
101			: callback2<void, io_watcher &, short>(object,method)
102			{ }
103
104			~io_watcher ();
105
106	pcg	1.5	void set (int fd_, short events_) { fd = fd_; events = events_; }
107	pcg	1.1
108	pcg	1.5	void set (short events_) { set (fd, events_); }
109			void start () { iom.reg (this); }
110	pcg	1.1	void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); }
111			void stop () { iom.unreg (this); }
112			};
113	pcg	1.2	#endif
114	pcg	1.1
115	pcg	1.2	#if IOM_TIME
116			enum { TSTAMP_CANCEL = -1 };
117	pcg	1.1
118			struct time_watcher : callback1<void, time_watcher &> {
119			tstamp at;
120
121			template<class O1, class O2>
122			time_watcher (O1 object, void (O2::method)(time_watcher &))
123			: callback1<void, time_watcher &>(object,method)
124			{ }
125
126			~time_watcher ();
127
128			void trigger ();
129
130			void set (tstamp when) { at = when; }
131			void operator ()() { trigger (); }
132			void start () { iom.reg (this); }
133			void start (tstamp when) { set (when); iom.reg (this); }
134			void stop () { iom.unreg (this); }
135
136			void reset (tstamp when = TSTAMP_CANCEL)
137			{
138			stop ();
139			at = when;
140			}
141			};
142	pcg	1.2	#endif
143
144			#if IOM_CHECK
145			// run before checking for new events
146			struct check_watcher : callback1<void, check_watcher &> {
147			template<class O1, class O2>
148			check_watcher (O1 object, void (O2::method)(check_watcher &))
149			: callback1<void, check_watcher &>(object,method)
150			{ }
151
152			~check_watcher ();
153	pcg	1.5
154			void start () { iom.reg (this); }
155			void stop () { iom.unreg (this); }
156			};
157			#endif
158
159			#if IOM_IDLE
160			// run after checking for any i/o, but before waiting
161			struct idle_watcher : callback1<void, idle_watcher &> {
162			template<class O1, class O2>
163			idle_watcher (O1 object, void (O2::method)(idle_watcher &))
164			: callback1<void, idle_watcher &>(object,method)
165			{ }
166
167			~idle_watcher ();
168	pcg	1.2
169			void start () { iom.reg (this); }
170			void stop () { iom.unreg (this); }
171			};
172			#endif
173	pcg	1.1
174			#endif
175