gvpe/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 <vector>

#include <cassert>

#include "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<io_watcher *> iow;
  vector<time_watcher *> tw; // actually a heap

  void idle_cb (time_watcher &w); time_watcher *idle;
public:

  void reschedule_time_watchers ();

  // register a watcher
  void reg (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; // a singleton, together with it's construction/destruction problems.

struct io_watcher : callback2<void, io_watcher &, short> {
  bool registered; // already registered?
  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)
    , registered(false)
    { }

  ~io_watcher ();

  void set(int fd_, short 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);
    }
};

#define TSTAMP_CANCEL -1.

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

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

  ~time_watcher ();

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

  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

Revision:	1.14
Committed:	Thu Oct 16 02:41:21 2003 UTC (20 years, 7 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	poll-based-iom, VPE_1_2
Changes since 1.13:	+2 -1 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	/*
2	pcg	1.14	iom.h -- generic I/O multiplexor
3			Copyright (C) 2003 Marc Lehmann <pcg@goof.com>
4	pcg	1.1
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 <vector>
24
25	pcg	1.11	#include <cassert>
26
27	pcg	1.13	#include "poll.h"
28	pcg	1.1
29	pcg	1.8	#include "callback.h"
30	pcg	1.1	#include "slog.h"
31
32	pcg	1.2	typedef double tstamp;
33	pcg	1.1
34	pcg	1.2	extern tstamp NOW;
35	pcg	1.1
36			struct io_watcher;
37			struct time_watcher;
38
39			class io_manager {
40			vector<pollfd> pfs;
41	pcg	1.10	vector<io_watcher *> iow;
42	pcg	1.1	vector<time_watcher *> tw; // actually a heap
43	pcg	1.4
44	pcg	1.10	void idle_cb (time_watcher &w); time_watcher *idle;
45	pcg	1.1	public:
46
47	pcg	1.6	void reschedule_time_watchers ();
48
49	pcg	1.1	// register a watcher
50	pcg	1.10	void reg (io_watcher *w);
51	pcg	1.7	void unreg (io_watcher *w);
52	pcg	1.1	void reg (time_watcher *w);
53	pcg	1.7	void unreg (time_watcher *w);
54	pcg	1.1
55			void loop ();
56
57			io_manager ();
58			~io_manager ();
59			};
60
61	pcg	1.11	extern io_manager iom; // a singleton, together with it's construction/destruction problems.
62	pcg	1.1
63	pcg	1.10	struct io_watcher : callback2<void, io_watcher &, short> {
64	pcg	1.12	bool registered; // already registered?
65			int fd;
66			short events;
67	pcg	1.10
68	pcg	1.1	template<class O1, class O2>
69	pcg	1.10	io_watcher (O1 object, void (O2::method)(io_watcher &, short))
70			: callback2<void, io_watcher &, short>(object,method)
71	pcg	1.12	, registered(false)
72	pcg	1.2	{ }
73
74	pcg	1.11	~io_watcher ();
75
76	pcg	1.12	void set(int fd_, short events_);
77	pcg	1.6
78	pcg	1.12	void set(short events_)
79	pcg	1.1	{
80	pcg	1.12	set (fd, events_);
81	pcg	1.11	}
82
83	pcg	1.12	void start (int fd_, short events_)
84	pcg	1.11	{
85	pcg	1.12	set (fd_, events_);
86			iom.reg (this);
87	pcg	1.1	}
88
89	pcg	1.7	void stop ()
90	pcg	1.4	{
91			iom.unreg (this);
92			}
93	pcg	1.1	};
94
95	pcg	1.4	#define TSTAMP_CANCEL -1.
96
97	pcg	1.10	struct time_watcher : callback1<void, time_watcher &> {
98	pcg	1.6	bool registered; // already registered?
99	pcg	1.2	tstamp at;
100
101			template<class O1, class O2>
102	pcg	1.10	time_watcher (O1 object, void (O2::method)(time_watcher &))
103			: callback1<void, time_watcher &>(object,method)
104	pcg	1.6	, registered(false)
105	pcg	1.2	{ }
106	pcg	1.6
107	pcg	1.11	~time_watcher ();
108	pcg	1.1
109	pcg	1.2	void set (tstamp when);
110	pcg	1.4	void trigger ();
111	pcg	1.1
112	pcg	1.4	void operator ()()
113	pcg	1.1	{
114	pcg	1.4	trigger ();
115	pcg	1.1	}
116
117	pcg	1.12	void start ()
118			{
119			iom.reg (this);
120			}
121
122	pcg	1.4	void start (tstamp when)
123	pcg	1.1	{
124	pcg	1.2	set (when);
125	pcg	1.12	iom.reg (this);
126	pcg	1.4	}
127
128	pcg	1.7	void stop ()
129	pcg	1.4	{
130			iom.unreg (this);
131			}
132
133			void reset (tstamp when = TSTAMP_CANCEL)
134			{
135			stop ();
136			at = when;
137	pcg	1.1	}
138			};
139
140			#endif
141