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
#undef IOM_CHECK

#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

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

  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
  
  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 (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

#endif

Revision:	1.3
Committed:	Sat Nov 29 18:42:07 2003 UTC (22 years, 10 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.2:	+0 -2 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			#undef IOM_CHECK
31
32			#if IOM_IO
33			typedef double tstamp;
34			extern tstamp NOW;
35
36			struct io_watcher;
37			#endif
38			#if IOM_TIME
39			struct time_watcher;
40			#endif
41			#if IOM_CHECK
42			struct check_watcher;
43			#endif
44	pcg	1.1
45	pcg	1.2	class io_manager {
46			#if IOM_IO
47			simplevec<io_watcher *> iow;
48			#endif
49			#if IOM_CHECK
50			simplevec<check_watcher *> cw;
51			#endif
52			#if IOM_TIME
53			simplevec<time_watcher *> tw;
54			#endif
55	pcg	1.1
56	pcg	1.2	template<class watcher>
57			void reg (watcher w, simplevec<watcher > &queue);
58	pcg	1.1
59	pcg	1.2	template<class watcher>
60			void unreg (watcher w, simplevec<watcher > &queue);
61	pcg	1.1
62			public:
63			// register a watcher
64	pcg	1.2	#if IOM_IO
65			void reg (io_watcher w); void unreg (io_watcher w);
66			#endif
67			#if IOM_TIME
68			void reg (time_watcher w); void unreg (time_watcher w);
69			#endif
70			#if IOM_CHECK
71			void reg (check_watcher w); void unreg (check_watcher w);
72			#endif
73	pcg	1.1
74			void loop ();
75
76			io_manager ();
77			~io_manager ();
78			};
79
80			extern io_manager iom; // a singleton, together with it's construction/destruction problems.
81
82	pcg	1.2	#if IOM_IO
83	pcg	1.1	enum { EVENT_READ = 1, EVENT_WRITE = 2 };
84
85			struct io_watcher : callback2<void, io_watcher &, short> {
86			int fd;
87			short events;
88
89			template<class O1, class O2>
90			io_watcher (O1 object, void (O2::method)(io_watcher &, short))
91			: callback2<void, io_watcher &, short>(object,method)
92			{ }
93
94			~io_watcher ();
95
96			void set(int fd_, short events_) { fd = fd_; events = events_; }
97
98			void set(short events_) { set (fd, events_); }
99			void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); }
100			void stop () { iom.unreg (this); }
101			};
102	pcg	1.2	#endif
103	pcg	1.1
104	pcg	1.2	#if IOM_TIME
105			enum { TSTAMP_CANCEL = -1 };
106	pcg	1.1
107			struct time_watcher : callback1<void, time_watcher &> {
108			tstamp at;
109
110			template<class O1, class O2>
111			time_watcher (O1 object, void (O2::method)(time_watcher &))
112			: callback1<void, time_watcher &>(object,method)
113			{ }
114
115			~time_watcher ();
116
117			void trigger ();
118
119			void set (tstamp when) { at = when; }
120			void operator ()() { trigger (); }
121			void start () { iom.reg (this); }
122			void start (tstamp when) { set (when); iom.reg (this); }
123			void stop () { iom.unreg (this); }
124
125			void reset (tstamp when = TSTAMP_CANCEL)
126			{
127			stop ();
128			at = when;
129			}
130			};
131	pcg	1.2	#endif
132
133			#if IOM_CHECK
134			// run before checking for new events
135			struct check_watcher : callback1<void, check_watcher &> {
136			template<class O1, class O2>
137			check_watcher (O1 object, void (O2::method)(check_watcher &))
138			: callback1<void, check_watcher &>(object,method)
139			{ }
140
141			~check_watcher ();
142
143			void start () { iom.reg (this); }
144			void stop () { iom.unreg (this); }
145			};
146			#endif
147	pcg	1.1
148			#endif
149