rxvt-unicode/src/iom.h

/*
    iom.h -- generic I/O multiplexor
    Copyright (C) 2003, 2004 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 IOM_H__
#define IOM_H__

// required:
// - a vector template like simplevec or stl's vector
// - defines for all watcher types required in your app
// edit iom_conf.h as appropriate.
#include "iom_conf.h"

#include "callback.h"

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

typedef double tstamp;
extern tstamp NOW;

struct watcher;
#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 vector<watcher *> {
  friend class io_manager;
protected:
#if IOM_CHECK
  bool activity;
#endif

  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, io_manager_vec<watcher> &queue);

  template<class watcher>
  void unreg (watcher *w, io_manager_vec<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), at(0)
  { }
  ~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:	1.9
Committed:	Thu Jan 29 23:26:01 2004 UTC (20 years, 3 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	before_astyle, after_astyle
Changes since 1.8:	+4 -0 lines
Log Message:	* empty log message *
#	Content
1	/*
2	iom.h -- generic I/O multiplexor
3	Copyright (C) 2003, 2004 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 IOM_H__
21	#define IOM_H__
22
23	// required:
24	// - a vector template like simplevec or stl's vector
25	// - defines for all watcher types required in your app
26	// edit iom_conf.h as appropriate.
27	#include "iom_conf.h"
28
29	#include "callback.h"
30
31	#ifndef IOM_IO
32	# define IOM_IO 0
33	#endif
34	#ifndef IOM_TIME
35	# define IOM_TIME 0
36	#endif
37	#ifndef IOM_CHECK
38	# define IOM_CHECK 0
39	#endif
40	#ifndef IOM_IDLE
41	# define IOM_IDLE 0
42	#endif
43
44	typedef double tstamp;
45	extern tstamp NOW;
46
47	struct watcher;
48	#if IOM_IO
49	struct io_watcher;
50	#endif
51	#if IOM_TIME
52	struct time_watcher;
53	#endif
54	#if IOM_CHECK
55	struct check_watcher;
56	#endif
57	#if IOM_IDLE
58	struct idle_watcher;
59	#endif
60
61	template<class watcher>
62	struct io_manager_vec : protected vector<watcher *> {
63	friend class io_manager;
64	protected:
65	#if IOM_CHECK
66	bool activity;
67	#endif
68
69	void erase_unordered (unsigned int pos)
70	{
71	watcher w = (this)[size () - 1];
72	pop_back ();
73
74	if (size ())
75	if ((*this)[pos] = w)
76	w->active = pos + 1;
77	}
78	};
79
80	class io_manager {
81	#if IOM_IO
82	io_manager_vec<io_watcher> iow;
83	#endif
84	#if IOM_CHECK
85	io_manager_vec<check_watcher> cw;
86	#endif
87	#if IOM_TIME
88	io_manager_vec<time_watcher> tw;
89	#endif
90	#if IOM_IDLE
91	io_manager_vec<idle_watcher> iw;
92	#endif
93
94	template<class watcher>
95	void reg (watcher *w, io_manager_vec<watcher> &queue);
96
97	template<class watcher>
98	void unreg (watcher *w, io_manager_vec<watcher> &queue);
99
100	public:
101	// register a watcher
102	#if IOM_IO
103	void reg (io_watcher w); void unreg (io_watcher w);
104	#endif
105	#if IOM_TIME
106	void reg (time_watcher w); void unreg (time_watcher w);
107	#endif
108	#if IOM_CHECK
109	void reg (check_watcher w); void unreg (check_watcher w);
110	#endif
111	#if IOM_IDLE
112	void reg (idle_watcher w); void unreg (idle_watcher w);
113	#endif
114
115	void loop ();
116
117	io_manager ();
118	~io_manager ();
119	};
120
121	extern io_manager iom; // a singleton, together with it's construction/destruction problems.
122
123	struct watcher {
124	int active; /* 0 == inactive, else index into respective vector */
125
126	watcher() : active(0) { }
127	};
128
129	#if IOM_IO
130	enum { EVENT_READ = 1, EVENT_WRITE = 2 };
131
132	struct io_watcher : watcher, callback2<void, io_watcher &, short> {
133	int fd;
134	short events;
135
136	void set (int fd_, short events_) { fd = fd_; events = events_; }
137
138	void set (short events_) { set (fd, events_); }
139	void start () { iom.reg (this); }
140	void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); }
141	void stop () { iom.unreg (this); }
142
143	template<class O1, class O2>
144	io_watcher (O1 object, void (O2::method)(io_watcher &, short))
145	: callback2<void, io_watcher &, short>(object,method)
146	{ }
147	~io_watcher () { stop (); }
148	};
149	#endif
150
151	#if IOM_TIME
152	struct time_watcher : watcher, callback1<void, time_watcher &> {
153	tstamp at;
154
155	void trigger ();
156
157	void set (tstamp when) { at = when; }
158	void operator ()() { trigger (); }
159	void start () { iom.reg (this); }
160	void start (tstamp when) { set (when); iom.reg (this); }
161	void stop () { iom.unreg (this); }
162
163	template<class O1, class O2>
164	time_watcher (O1 object, void (O2::method)(time_watcher &))
165	: callback1<void, time_watcher &>(object,method), at(0)
166	{ }
167	~time_watcher () { stop (); }
168	};
169	#endif
170
171	#if IOM_CHECK
172	// run before checking for new events
173	struct check_watcher : watcher, callback1<void, check_watcher &> {
174	void start () { iom.reg (this); }
175	void stop () { iom.unreg (this); }
176
177	template<class O1, class O2>
178	check_watcher (O1 object, void (O2::method)(check_watcher &))
179	: callback1<void, check_watcher &>(object,method)
180	{ }
181	~check_watcher () { stop (); }
182	};
183	#endif
184
185	#if IOM_IDLE
186	// run after checking for any i/o, but before waiting
187	struct idle_watcher : watcher, callback1<void, idle_watcher &> {
188	void start () { iom.reg (this); }
189	void stop () { iom.unreg (this); }
190
191	template<class O1, class O2>
192	idle_watcher (O1 object, void (O2::method)(idle_watcher &))
193	: callback1<void, idle_watcher &>(object,method)
194	{ }
195	~idle_watcher () { stop (); }
196	};
197	#endif
198
199	#endif
200