cvsroot/libev/ev%2B%2B.h

/*
 * libev simple C++ wrapper classes
 *
 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modifica-
 * tion, are permitted provided that the following conditions are met:
 * 
 *   1.  Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 * 
 *   2.  Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Alternatively, the contents of this file may be used under the terms of
 * the GNU General Public License ("GPL") version 2 or any later version,
 * in which case the provisions of the GPL are applicable instead of
 * the above. If you wish to allow the use of your version of this file
 * only under the terms of the GPL and not to allow others to use your
 * version of this file under the BSD license, indicate your decision
 * by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL. If you do not delete the
 * provisions above, a recipient may use your version of this file under
 * either the BSD or the GPL.
 */

#ifndef EVPP_H__
#define EVPP_H__

#ifdef EV_H
# include EV_H
#else
# include <ev.h>
#endif

namespace ev {

  template<class ev_watcher, class watcher>
  struct base : ev_watcher
  {
    #if EV_MULTIPLICITY
      EV_P;

      void set (EV_P)
      {
        this->EV_A = EV_A;
      }
    #endif

    base ()
    {
      ev_init (this, 0);
    }

    void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents))
    {
      this->data = data;
      ev_set_cb (static_cast<ev_watcher *>(this), cb);
    }

    // method callback
    template<class K, void (K::*method)(watcher &w, int)>
    void set (K *object)
    {
      set_ (object, method_thunk<K, method>);
    }

    template<class K, void (K::*method)(watcher &w, int)>
    static void method_thunk (EV_P_ ev_watcher *w, int revents)
    {
      K *obj = static_cast<K *>(w->data);
      (obj->*method) (*static_cast<watcher *>(w), revents);
    }

    // const method callback
    template<class K, void (K::*method)(watcher &w, int) const>
    void set (const K *object)
    {
      set_ (object, const_method_thunk<K, method>);
    }

    template<class K, void (K::*method)(watcher &w, int) const>
    static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
    {
      K *obj = static_cast<K *>(w->data);
      (static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents);
    }

    // function callback
    template<void (*function)(watcher &w, int)>
    void set (void *data = 0)
    {
      set_ (data, function_thunk<function>);
    }

    template<void (*function)(watcher &w, int)>
    static void function_thunk (EV_P_ ev_watcher *w, int revents)
    {
      function (*static_cast<watcher *>(w), revents);
    }

    // simple callback
    template<class K, void (K::*method)()>
    void set (K *object)
    {
      set_ (object, method_noargs_thunk<K, method>);
    }

    template<class K, void (K::*method)()>
    static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
    {
      K *obj = static_cast<K *>(w->data);
      (obj->*method) ();
    }

    void operator ()(int events = EV_UNDEF)
    {
      return ev_cb (static_cast<ev_watcher *>(this))
        (static_cast<ev_watcher *>(this), events);
    }

    bool is_active () const
    {
      return ev_is_active (static_cast<const ev_watcher *>(this));
    }

    bool is_pending () const
    {
      return ev_is_pending (static_cast<const ev_watcher *>(this));
    }
  };

  enum {
    UNDEF    = EV_UNDEF,
    NONE     = EV_NONE,
    READ     = EV_READ,
    WRITE    = EV_WRITE,
    TIMEOUT  = EV_TIMEOUT,
    PERIODIC = EV_PERIODIC,
    SIGNAL   = EV_SIGNAL,
    CHILD    = EV_CHILD,
    STAT     = EV_STAT,
    IDLE     = EV_IDLE,
    CHECK    = EV_CHECK,
    PREPARE  = EV_PREPARE,
    FORK     = EV_FORK,
    EMBED    = EV_EMBED,
    ERROR    = EV_ERROR,
  };

  typedef ev_tstamp tstamp;

  inline ev_tstamp now (EV_P)
  {
    return ev_now (EV_A);
  }

  #if EV_MULTIPLICITY
    #define EV_CONSTRUCT                                                                \
      (EV_P = EV_DEFAULT)                                                               \
      {                                                                                 \
        set (EV_A);                                                                     \
      }
  #else
    #define EV_CONSTRUCT                                                                \
      ()                                                                                \
      {                                                                                 \
      }
  #endif

  /* using a template here would require quite a bit more lines,
   * so a macro solution was chosen */
  #define EV_BEGIN_WATCHER(cppstem,cstem)                                               \
                                                                                        \
  struct cppstem : base<ev_ ## cstem, cppstem>                                          \
  {                                                                                     \
    void start ()                                                                       \
    {                                                                                   \
      ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this));                 \
    }                                                                                   \
                                                                                        \
    void stop ()                                                                        \
    {                                                                                   \
      ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this));                  \
    }                                                                                   \
                                                                                        \
    cppstem EV_CONSTRUCT                                                                \
                                                                                        \
    ~cppstem ()                                                                         \
    {                                                                                   \
      stop ();                                                                          \
    }                                                                                   \
                                                                                        \
    using base<ev_ ## cstem, cppstem>::set;                                             \
                                                                                        \
  private:                                                                              \
                                                                                        \
    cppstem (const cppstem &o)                                                          \
    { /* disabled */ }                                                                  \
                                                                                        \
    void operator =(const cppstem &o) { /* disabled */ }                                \
                                                                                        \
  public:

  #define EV_END_WATCHER(cppstem,cstem)                                                 \
  };

  EV_BEGIN_WATCHER (io, io)
    void set (int fd, int events)
    {
      int active = is_active ();
      if (active) stop ();
      ev_io_set (static_cast<ev_io *>(this), fd, events);
      if (active) start ();
    }

    void set (int events)
    {
      int active = is_active ();
      if (active) stop ();
      ev_io_set (static_cast<ev_io *>(this), fd, events);
      if (active) start ();
    }

    void start (int fd, int events)
    {
      set (fd, events);
      start ();
    }
  EV_END_WATCHER (io, io)

  EV_BEGIN_WATCHER (timer, timer)
    void set (ev_tstamp after, ev_tstamp repeat = 0.)
    {
      int active = is_active ();
      if (active) stop ();
      ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
      if (active) start ();
    }

    void start (ev_tstamp after, ev_tstamp repeat = 0.)
    {
      set (after, repeat);
      start ();
    }

    void again ()
    {
      ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
    }
  EV_END_WATCHER (timer, timer)

  #if EV_PERIODIC_ENABLE
  EV_BEGIN_WATCHER (periodic, periodic)
    void set (ev_tstamp at, ev_tstamp interval = 0.)
    {
      int active = is_active ();
      if (active) stop ();
      ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
      if (active) start ();
    }

    void start (ev_tstamp at, ev_tstamp interval = 0.)
    {
      set (at, interval);
      start ();
    }

    void again ()
    {
      ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
    }
  EV_END_WATCHER (periodic, periodic)
  #endif

  EV_BEGIN_WATCHER (sig, signal)
    void set (int signum)
    {
      int active = is_active ();
      if (active) stop ();
      ev_signal_set (static_cast<ev_signal *>(this), signum);
      if (active) start ();
    }

    void start (int signum)
    {
      set (signum);
      start ();
    }
  EV_END_WATCHER (sig, signal)

  EV_BEGIN_WATCHER (child, child)
    void set (int pid)
    {
      int active = is_active ();
      if (active) stop ();
      ev_child_set (static_cast<ev_child *>(this), pid);
      if (active) start ();
    }

    void start (int pid)
    {
      set (pid);
      start ();
    }
  EV_END_WATCHER (child, child)

  #if EV_STAT_ENABLE
  EV_BEGIN_WATCHER (stat, stat)
    void set (const char *path, ev_tstamp interval = 0.)
    {
      int active = is_active ();
      if (active) stop ();
      ev_stat_set (static_cast<ev_stat *>(this), path, interval);
      if (active) start ();
    }

    void start (const char *path, ev_tstamp interval = 0.)
    {
      stop ();
      set (path, interval);
      start ();
    }

    void update ()
    {
      ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
    }
  EV_END_WATCHER (stat, stat)
  #endif

  EV_BEGIN_WATCHER (idle, idle)
    void set () { }
  EV_END_WATCHER (idle, idle)

  EV_BEGIN_WATCHER (prepare, prepare)
    void set () { }
  EV_END_WATCHER (prepare, prepare)

  EV_BEGIN_WATCHER (check, check)
    void set () { }
  EV_END_WATCHER (check, check)

  #if EV_EMBED_ENABLE
  EV_BEGIN_WATCHER (embed, embed)
    void start (struct ev_loop *embedded_loop)
    {
      stop ();
      ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
      start ();
    }

    void sweep ()
    {
      ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
    }
  EV_END_WATCHER (embed, embed)
  #endif

  #if EV_FORK_ENABLE
  EV_BEGIN_WATCHER (fork, fork)
    void set () { }
  EV_END_WATCHER (fork, fork)
  #endif

  #undef EV_CONSTRUCT
  #undef EV_BEGIN_WATCHER
  #undef EV_END_WATCHER
}

#endif

Revision:	1.21
Committed:	Tue Dec 25 07:05:45 2007 UTC (18 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_01
Changes since 1.20:	+39 -0 lines
Log Message:	* empty log message *
#	Content
1	/*
2	* libev simple C++ wrapper classes
3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.
6	*
7	* Redistribution and use in source and binary forms, with or without modifica-
8	* tion, are permitted provided that the following conditions are met:
9	*
10	* 1. Redistributions of source code must retain the above copyright notice,
11	* this list of conditions and the following disclaimer.
12	*
13	* 2. Redistributions in binary form must reproduce the above copyright
14	* notice, this list of conditions and the following disclaimer in the
15	* documentation and/or other materials provided with the distribution.
16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26	* OF THE POSSIBILITY OF SUCH DAMAGE.
27	*
28	* Alternatively, the contents of this file may be used under the terms of
29	* the GNU General Public License ("GPL") version 2 or any later version,
30	* in which case the provisions of the GPL are applicable instead of
31	* the above. If you wish to allow the use of your version of this file
32	* only under the terms of the GPL and not to allow others to use your
33	* version of this file under the BSD license, indicate your decision
34	* by deleting the provisions above and replace them with the notice
35	* and other provisions required by the GPL. If you do not delete the
36	* provisions above, a recipient may use your version of this file under
37	* either the BSD or the GPL.
38	*/
39
40	#ifndef EVPP_H__
41	#define EVPP_H__
42
43	#ifdef EV_H
44	# include EV_H
45	#else
46	# include <ev.h>
47	#endif
48
49	namespace ev {
50
51	template<class ev_watcher, class watcher>
52	struct base : ev_watcher
53	{
54	#if EV_MULTIPLICITY
55	EV_P;
56
57	void set (EV_P)
58	{
59	this->EV_A = EV_A;
60	}
61	#endif
62
63	base ()
64	{
65	ev_init (this, 0);
66	}
67
68	void set_ (void data, void (cb)(EV_P_ ev_watcher *w, int revents))
69	{
70	this->data = data;
71	ev_set_cb (static_cast<ev_watcher *>(this), cb);
72	}
73
74	// method callback
75	template<class K, void (K::*method)(watcher &w, int)>
76	void set (K *object)
77	{
78	set_ (object, method_thunk<K, method>);
79	}
80
81	template<class K, void (K::*method)(watcher &w, int)>
82	static void method_thunk (EV_P_ ev_watcher *w, int revents)
83	{
84	K obj = static_cast<K >(w->data);
85	(obj->method) (static_cast<watcher *>(w), revents);
86	}
87
88	// const method callback
89	template<class K, void (K::*method)(watcher &w, int) const>
90	void set (const K *object)
91	{
92	set_ (object, const_method_thunk<K, method>);
93	}
94
95	template<class K, void (K::*method)(watcher &w, int) const>
96	static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
97	{
98	K obj = static_cast<K >(w->data);
99	(static_cast<K >(w->data)->method) (static_cast<watcher >(w), revents);
100	}
101
102	// function callback
103	template<void (*function)(watcher &w, int)>
104	void set (void *data = 0)
105	{
106	set_ (data, function_thunk<function>);
107	}
108
109	template<void (*function)(watcher &w, int)>
110	static void function_thunk (EV_P_ ev_watcher *w, int revents)
111	{
112	function (static_cast<watcher >(w), revents);
113	}
114
115	// simple callback
116	template<class K, void (K::*method)()>
117	void set (K *object)
118	{
119	set_ (object, method_noargs_thunk<K, method>);
120	}
121
122	template<class K, void (K::*method)()>
123	static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
124	{
125	K obj = static_cast<K >(w->data);
126	(obj->*method) ();
127	}
128
129	void operator ()(int events = EV_UNDEF)
130	{
131	return ev_cb (static_cast<ev_watcher *>(this))
132	(static_cast<ev_watcher *>(this), events);
133	}
134
135	bool is_active () const
136	{
137	return ev_is_active (static_cast<const ev_watcher *>(this));
138	}
139
140	bool is_pending () const
141	{
142	return ev_is_pending (static_cast<const ev_watcher *>(this));
143	}
144	};
145
146	enum {
147	UNDEF = EV_UNDEF,
148	NONE = EV_NONE,
149	READ = EV_READ,
150	WRITE = EV_WRITE,
151	TIMEOUT = EV_TIMEOUT,
152	PERIODIC = EV_PERIODIC,
153	SIGNAL = EV_SIGNAL,
154	CHILD = EV_CHILD,
155	STAT = EV_STAT,
156	IDLE = EV_IDLE,
157	CHECK = EV_CHECK,
158	PREPARE = EV_PREPARE,
159	FORK = EV_FORK,
160	EMBED = EV_EMBED,
161	ERROR = EV_ERROR,
162	};
163
164	typedef ev_tstamp tstamp;
165
166	inline ev_tstamp now (EV_P)
167	{
168	return ev_now (EV_A);
169	}
170
171	#if EV_MULTIPLICITY
172	#define EV_CONSTRUCT \
173	(EV_P = EV_DEFAULT) \
174	{ \
175	set (EV_A); \
176	}
177	#else
178	#define EV_CONSTRUCT \
179	() \
180	{ \
181	}
182	#endif
183
184	/* using a template here would require quite a bit more lines,
185	* so a macro solution was chosen */
186	#define EV_BEGIN_WATCHER(cppstem,cstem) \
187	\
188	struct cppstem : base<ev_ ## cstem, cppstem> \
189	{ \
190	void start () \
191	{ \
192	ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
193	} \
194	\
195	void stop () \
196	{ \
197	ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
198	} \
199	\
200	cppstem EV_CONSTRUCT \
201	\
202	~cppstem () \
203	{ \
204	stop (); \
205	} \
206	\
207	using base<ev_ ## cstem, cppstem>::set; \
208	\
209	private: \
210	\
211	cppstem (const cppstem &o) \
212	{ /* disabled */ } \
213	\
214	void operator =(const cppstem &o) { /* disabled */ } \
215	\
216	public:
217
218	#define EV_END_WATCHER(cppstem,cstem) \
219	};
220
221	EV_BEGIN_WATCHER (io, io)
222	void set (int fd, int events)
223	{
224	int active = is_active ();
225	if (active) stop ();
226	ev_io_set (static_cast<ev_io *>(this), fd, events);
227	if (active) start ();
228	}
229
230	void set (int events)
231	{
232	int active = is_active ();
233	if (active) stop ();
234	ev_io_set (static_cast<ev_io *>(this), fd, events);
235	if (active) start ();
236	}
237
238	void start (int fd, int events)
239	{
240	set (fd, events);
241	start ();
242	}
243	EV_END_WATCHER (io, io)
244
245	EV_BEGIN_WATCHER (timer, timer)
246	void set (ev_tstamp after, ev_tstamp repeat = 0.)
247	{
248	int active = is_active ();
249	if (active) stop ();
250	ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
251	if (active) start ();
252	}
253
254	void start (ev_tstamp after, ev_tstamp repeat = 0.)
255	{
256	set (after, repeat);
257	start ();
258	}
259
260	void again ()
261	{
262	ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
263	}
264	EV_END_WATCHER (timer, timer)
265
266	#if EV_PERIODIC_ENABLE
267	EV_BEGIN_WATCHER (periodic, periodic)
268	void set (ev_tstamp at, ev_tstamp interval = 0.)
269	{
270	int active = is_active ();
271	if (active) stop ();
272	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
273	if (active) start ();
274	}
275
276	void start (ev_tstamp at, ev_tstamp interval = 0.)
277	{
278	set (at, interval);
279	start ();
280	}
281
282	void again ()
283	{
284	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
285	}
286	EV_END_WATCHER (periodic, periodic)
287	#endif
288
289	EV_BEGIN_WATCHER (sig, signal)
290	void set (int signum)
291	{
292	int active = is_active ();
293	if (active) stop ();
294	ev_signal_set (static_cast<ev_signal *>(this), signum);
295	if (active) start ();
296	}
297
298	void start (int signum)
299	{
300	set (signum);
301	start ();
302	}
303	EV_END_WATCHER (sig, signal)
304
305	EV_BEGIN_WATCHER (child, child)
306	void set (int pid)
307	{
308	int active = is_active ();
309	if (active) stop ();
310	ev_child_set (static_cast<ev_child *>(this), pid);
311	if (active) start ();
312	}
313
314	void start (int pid)
315	{
316	set (pid);
317	start ();
318	}
319	EV_END_WATCHER (child, child)
320
321	#if EV_STAT_ENABLE
322	EV_BEGIN_WATCHER (stat, stat)
323	void set (const char *path, ev_tstamp interval = 0.)
324	{
325	int active = is_active ();
326	if (active) stop ();
327	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
328	if (active) start ();
329	}
330
331	void start (const char *path, ev_tstamp interval = 0.)
332	{
333	stop ();
334	set (path, interval);
335	start ();
336	}
337
338	void update ()
339	{
340	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
341	}
342	EV_END_WATCHER (stat, stat)
343	#endif
344
345	EV_BEGIN_WATCHER (idle, idle)
346	void set () { }
347	EV_END_WATCHER (idle, idle)
348
349	EV_BEGIN_WATCHER (prepare, prepare)
350	void set () { }
351	EV_END_WATCHER (prepare, prepare)
352
353	EV_BEGIN_WATCHER (check, check)
354	void set () { }
355	EV_END_WATCHER (check, check)
356
357	#if EV_EMBED_ENABLE
358	EV_BEGIN_WATCHER (embed, embed)
359	void start (struct ev_loop *embedded_loop)
360	{
361	stop ();
362	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
363	start ();
364	}
365
366	void sweep ()
367	{
368	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
369	}
370	EV_END_WATCHER (embed, embed)
371	#endif
372
373	#if EV_FORK_ENABLE
374	EV_BEGIN_WATCHER (fork, fork)
375	void set () { }
376	EV_END_WATCHER (fork, fork)
377	#endif
378
379	#undef EV_CONSTRUCT
380	#undef EV_BEGIN_WATCHER
381	#undef EV_END_WATCHER
382	}
383
384	#endif
385