gvpe/src/iom.h

/*
    iom.h -- I/O multiplexor
 
    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 <vector>

#include <sys/poll.h>

#include "callback.h"
#include "slog.h"

typedef double tstamp;

extern tstamp NOW;

struct io_watcher;
struct time_watcher;

class io_manager {
  vector<pollfd> pfs;
  vector<const io_watcher *> iow;
  vector<time_watcher *> tw; // actually a heap

  void idle_cb (tstamp &ts); time_watcher *idle;
public:

  void reschedule_time_watchers ();

  // register a watcher
  void reg (int fd, short events, io_watcher *w);
  void unreg (io_watcher *w);
  void reg (time_watcher *w);
  void unreg (time_watcher *w);
  
  void loop ();

  io_manager ();
  ~io_manager ();
};

extern io_manager iom;

struct io_watcher : callback2<void, int, short> {
  template<class O1, class O2>
  io_watcher (O1 *object, void (O2::*method)(int fd, short revents))
    : callback2<void, int, short>(object,method)
    { }

  ~io_watcher ()
    {
      iom.unreg (this);
    }

  void start (int fd, short events)
    {
      iom.reg (fd, events, this);
    }

  void stop ()
    {
      iom.unreg (this);
    }
};

#define TSTAMP_CANCEL -1.

struct time_watcher : callback1<void, tstamp &> {
  bool registered; // already registered?
  tstamp at;

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

  ~time_watcher ()
    {
      iom.unreg (this);
    }

  void set (tstamp when);
  void trigger ();

  void operator ()()
    {
      trigger ();
    }

  void start ();
  void start (tstamp when)
    {
      set (when);
    }

  void stop ()
    {
      iom.unreg (this);
    }

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

#endif

Revision:	1.9
Committed:	Wed Apr 2 05:15:00 2003 UTC (21 years, 1 month ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.8:	+5 -5 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	/*
2			iom.h -- I/O multiplexor
3
4			This program is free software; you can redistribute it and/or modify
5			it under the terms of the GNU General Public License as published by
6			the Free Software Foundation; either version 2 of the License, or
7			(at your option) any later version.
8
9			This program is distributed in the hope that it will be useful,
10			but WITHOUT ANY WARRANTY; without even the implied warranty of
11			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12			GNU General Public License for more details.
13
14			You should have received a copy of the GNU General Public License
15			along with this program; if not, write to the Free Software
16			Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17			*/
18
19			#ifndef VPE_IOM_H__
20			#define VPE_IOM_H__
21
22			#include <vector>
23
24			#include <sys/poll.h>
25
26	pcg	1.8	#include "callback.h"
27	pcg	1.1	#include "slog.h"
28
29	pcg	1.2	typedef double tstamp;
30	pcg	1.1
31	pcg	1.2	extern tstamp NOW;
32	pcg	1.1
33			struct io_watcher;
34			struct time_watcher;
35
36			class io_manager {
37			vector<pollfd> pfs;
38	pcg	1.5	vector<const io_watcher *> iow;
39	pcg	1.1	vector<time_watcher *> tw; // actually a heap
40	pcg	1.4
41			void idle_cb (tstamp &ts); time_watcher *idle;
42	pcg	1.1	public:
43
44	pcg	1.6	void reschedule_time_watchers ();
45
46	pcg	1.1	// register a watcher
47			void reg (int fd, short events, io_watcher *w);
48	pcg	1.7	void unreg (io_watcher *w);
49	pcg	1.1	void reg (time_watcher *w);
50	pcg	1.7	void unreg (time_watcher *w);
51	pcg	1.1
52			void loop ();
53
54			io_manager ();
55			~io_manager ();
56			};
57
58			extern io_manager iom;
59
60	pcg	1.9	struct io_watcher : callback2<void, int, short> {
61	pcg	1.1	template<class O1, class O2>
62	pcg	1.9	io_watcher (O1 object, void (O2::method)(int fd, short revents))
63			: callback2<void, int, short>(object,method)
64	pcg	1.2	{ }
65
66	pcg	1.6	~io_watcher ()
67			{
68			iom.unreg (this);
69			}
70
71	pcg	1.2	void start (int fd, short events)
72	pcg	1.1	{
73			iom.reg (fd, events, this);
74			}
75
76	pcg	1.7	void stop ()
77	pcg	1.4	{
78			iom.unreg (this);
79			}
80	pcg	1.1	};
81
82	pcg	1.4	#define TSTAMP_CANCEL -1.
83
84	pcg	1.9	struct time_watcher : callback1<void, tstamp &> {
85	pcg	1.6	bool registered; // already registered?
86	pcg	1.2	tstamp at;
87
88			template<class O1, class O2>
89			time_watcher (O1 object, void (O2::method)(tstamp &))
90	pcg	1.9	: callback1<void, tstamp &>(object,method)
91	pcg	1.6	, registered(false)
92	pcg	1.2	{ }
93	pcg	1.6
94			~time_watcher ()
95			{
96			iom.unreg (this);
97			}
98	pcg	1.1
99	pcg	1.2	void set (tstamp when);
100	pcg	1.4	void trigger ();
101	pcg	1.1
102	pcg	1.4	void operator ()()
103	pcg	1.1	{
104	pcg	1.4	trigger ();
105	pcg	1.1	}
106
107	pcg	1.4	void start ();
108			void start (tstamp when)
109	pcg	1.1	{
110	pcg	1.2	set (when);
111	pcg	1.4	}
112
113	pcg	1.7	void stop ()
114	pcg	1.4	{
115			iom.unreg (this);
116			}
117
118			void reset (tstamp when = TSTAMP_CANCEL)
119			{
120			stop ();
121			at = when;
122	pcg	1.1	}
123			};
124
125			#endif
126