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

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

typedef double tstamp;
extern tstamp NOW;

#if IOM_IO
  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

template<class watcher>
struct io_manager_vec : protected simplevec<watcher *> {
  friend class io_manager;
protected:
  void erase_unordered (unsigned int pos)
  {
    watcher *w = (*this)[size () - 1];
    pop_back ();

    if (size ())
      if ((*this)[pos] = w)
        w->active = pos + 1;
  }
};

class io_manager {
#if IOM_IO
  io_manager_vec<io_watcher>    iow;
#endif
#if IOM_CHECK
  io_manager_vec<check_watcher> cw;
#endif
#if IOM_TIME
  io_manager_vec<time_watcher>  tw;
#endif
#if IOM_IDLE
  io_manager_vec<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.

struct watcher {
  int active; /* 0 == inactive, else index into respective vector */

  watcher() : active(0) { }
};

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

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

  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); }

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

#if IOM_TIME
struct time_watcher : watcher, callback1<void, time_watcher &> {
  tstamp at;

  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); }

  template<class O1, class O2>
  time_watcher (O1 *object, void (O2::*method)(time_watcher &))
  : callback1<void, time_watcher &>(object,method)
  { }
  ~time_watcher () { stop (); }
};
#endif

#if IOM_CHECK
// run before checking for new events
struct check_watcher : watcher, callback1<void, check_watcher &> {
  void start () { iom.reg (this); }
  void stop () { iom.unreg (this); }

  template<class O1, class O2>
  check_watcher (O1 *object, void (O2::*method)(check_watcher &))
  : callback1<void, check_watcher &>(object,method)
  { }
  ~check_watcher () { stop (); }
};
#endif

#if IOM_IDLE
// run after checking for any i/o, but before waiting
struct idle_watcher : watcher, callback1<void, idle_watcher &> {
  void start () { iom.reg (this); }
  void stop () { iom.unreg (this); }

  template<class O1, class O2>
  idle_watcher (O1 *object, void (O2::*method)(idle_watcher &))
    : callback1<void, idle_watcher &>(object,method)
    { }
  ~idle_watcher () { stop (); }
};
#endif

#endif

Revision:	1.6
Committed:	Fri Jan 16 22:11:09 2004 UTC (20 years, 4 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.5:	+66 -49 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	pcg	1.6	#include "callback.h"
26	pcg	1.1	#include "rxvtvec.h"
27
28	pcg	1.6	#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
41			typedef double tstamp;
42			extern tstamp NOW;
43	pcg	1.2
44			#if IOM_IO
45			struct io_watcher;
46			#endif
47			#if IOM_TIME
48			struct time_watcher;
49			#endif
50			#if IOM_CHECK
51			struct check_watcher;
52			#endif
53	pcg	1.5	#if IOM_IDLE
54			struct idle_watcher;
55			#endif
56	pcg	1.1
57	pcg	1.6	template<class watcher>
58			struct io_manager_vec : protected simplevec<watcher *> {
59			friend class io_manager;
60			protected:
61			void erase_unordered (unsigned int pos)
62			{
63			watcher w = (this)[size () - 1];
64			pop_back ();
65
66			if (size ())
67			if ((*this)[pos] = w)
68			w->active = pos + 1;
69			}
70			};
71
72	pcg	1.2	class io_manager {
73			#if IOM_IO
74	pcg	1.6	io_manager_vec<io_watcher> iow;
75	pcg	1.2	#endif
76			#if IOM_CHECK
77	pcg	1.6	io_manager_vec<check_watcher> cw;
78	pcg	1.2	#endif
79			#if IOM_TIME
80	pcg	1.6	io_manager_vec<time_watcher> tw;
81	pcg	1.2	#endif
82	pcg	1.5	#if IOM_IDLE
83	pcg	1.6	io_manager_vec<idle_watcher> iw;
84	pcg	1.5	#endif
85	pcg	1.1
86	pcg	1.2	template<class watcher>
87			void reg (watcher w, simplevec<watcher > &queue);
88	pcg	1.1
89	pcg	1.2	template<class watcher>
90			void unreg (watcher w, simplevec<watcher > &queue);
91	pcg	1.1
92			public:
93			// register a watcher
94	pcg	1.2	#if IOM_IO
95	pcg	1.5	void reg (io_watcher w); void unreg (io_watcher w);
96	pcg	1.2	#endif
97			#if IOM_TIME
98	pcg	1.5	void reg (time_watcher w); void unreg (time_watcher w);
99	pcg	1.2	#endif
100			#if IOM_CHECK
101			void reg (check_watcher w); void unreg (check_watcher w);
102			#endif
103	pcg	1.5	#if IOM_IDLE
104			void reg (idle_watcher w); void unreg (idle_watcher w);
105			#endif
106	pcg	1.1
107			void loop ();
108
109			io_manager ();
110			~io_manager ();
111			};
112
113			extern io_manager iom; // a singleton, together with it's construction/destruction problems.
114
115	pcg	1.6	struct watcher {
116			int active; /* 0 == inactive, else index into respective vector */
117
118			watcher() : active(0) { }
119			};
120
121	pcg	1.2	#if IOM_IO
122	pcg	1.1	enum { EVENT_READ = 1, EVENT_WRITE = 2 };
123
124	pcg	1.6	struct io_watcher : watcher, callback2<void, io_watcher &, short> {
125	pcg	1.1	int fd;
126			short events;
127
128	pcg	1.5	void set (int fd_, short events_) { fd = fd_; events = events_; }
129	pcg	1.1
130	pcg	1.5	void set (short events_) { set (fd, events_); }
131			void start () { iom.reg (this); }
132	pcg	1.1	void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); }
133			void stop () { iom.unreg (this); }
134	pcg	1.6
135			template<class O1, class O2>
136			io_watcher (O1 object, void (O2::method)(io_watcher &, short))
137			: callback2<void, io_watcher &, short>(object,method)
138			{ }
139			~io_watcher () { stop (); }
140	pcg	1.1	};
141	pcg	1.2	#endif
142	pcg	1.1
143	pcg	1.2	#if IOM_TIME
144	pcg	1.6	struct time_watcher : watcher, callback1<void, time_watcher &> {
145	pcg	1.1	tstamp at;
146
147			void trigger ();
148
149			void set (tstamp when) { at = when; }
150			void operator ()() { trigger (); }
151			void start () { iom.reg (this); }
152			void start (tstamp when) { set (when); iom.reg (this); }
153			void stop () { iom.unreg (this); }
154
155	pcg	1.6	template<class O1, class O2>
156			time_watcher (O1 object, void (O2::method)(time_watcher &))
157			: callback1<void, time_watcher &>(object,method)
158			{ }
159			~time_watcher () { stop (); }
160	pcg	1.1	};
161	pcg	1.2	#endif
162
163			#if IOM_CHECK
164			// run before checking for new events
165	pcg	1.6	struct check_watcher : watcher, callback1<void, check_watcher &> {
166			void start () { iom.reg (this); }
167			void stop () { iom.unreg (this); }
168
169	pcg	1.2	template<class O1, class O2>
170			check_watcher (O1 object, void (O2::method)(check_watcher &))
171	pcg	1.6	: callback1<void, check_watcher &>(object,method)
172			{ }
173			~check_watcher () { stop (); }
174	pcg	1.5	};
175			#endif
176
177			#if IOM_IDLE
178			// run after checking for any i/o, but before waiting
179	pcg	1.6	struct idle_watcher : watcher, callback1<void, idle_watcher &> {
180			void start () { iom.reg (this); }
181			void stop () { iom.unreg (this); }
182
183	pcg	1.5	template<class O1, class O2>
184			idle_watcher (O1 object, void (O2::method)(idle_watcher &))
185			: callback1<void, idle_watcher &>(object,method)
186			{ }
187	pcg	1.6	~idle_watcher () { stop (); }
188	pcg	1.2	};
189			#endif
190	pcg	1.1
191			#endif
192