libev/ev%2B%2B.h

#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:	1.20
Committed:	Thu Dec 20 08:17:57 2007 UTC (16 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_0
Changes since 1.19:	+5 -1 lines
Log Message:	* empty log message *
#	Content
1	#ifndef EVPP_H__
2	#define EVPP_H__
3
4	#ifdef EV_H
5	# include EV_H
6	#else
7	# include <ev.h>
8	#endif
9
10	namespace ev {
11
12	template<class ev_watcher, class watcher>
13	struct base : ev_watcher
14	{
15	#if EV_MULTIPLICITY
16	EV_P;
17
18	void set (EV_P)
19	{
20	this->EV_A = EV_A;
21	}
22	#endif
23
24	base ()
25	{
26	ev_init (this, 0);
27	}
28
29	void set_ (void data, void (cb)(EV_P_ ev_watcher *w, int revents))
30	{
31	this->data = data;
32	ev_set_cb (static_cast<ev_watcher *>(this), cb);
33	}
34
35	// method callback
36	template<class K, void (K::*method)(watcher &w, int)>
37	void set (K *object)
38	{
39	set_ (object, method_thunk<K, method>);
40	}
41
42	template<class K, void (K::*method)(watcher &w, int)>
43	static void method_thunk (EV_P_ ev_watcher *w, int revents)
44	{
45	K obj = static_cast<K >(w->data);
46	(obj->method) (static_cast<watcher *>(w), revents);
47	}
48
49	// const method callback
50	template<class K, void (K::*method)(watcher &w, int) const>
51	void set (const K *object)
52	{
53	set_ (object, const_method_thunk<K, method>);
54	}
55
56	template<class K, void (K::*method)(watcher &w, int) const>
57	static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
58	{
59	K obj = static_cast<K >(w->data);
60	(static_cast<K >(w->data)->method) (static_cast<watcher >(w), revents);
61	}
62
63	// function callback
64	template<void (*function)(watcher &w, int)>
65	void set (void *data = 0)
66	{
67	set_ (data, function_thunk<function>);
68	}
69
70	template<void (*function)(watcher &w, int)>
71	static void function_thunk (EV_P_ ev_watcher *w, int revents)
72	{
73	function (static_cast<watcher >(w), revents);
74	}
75
76	// simple callback
77	template<class K, void (K::*method)()>
78	void set (K *object)
79	{
80	set_ (object, method_noargs_thunk<K, method>);
81	}
82
83	template<class K, void (K::*method)()>
84	static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
85	{
86	K obj = static_cast<K >(w->data);
87	(obj->*method) ();
88	}
89
90	void operator ()(int events = EV_UNDEF)
91	{
92	return ev_cb (static_cast<ev_watcher *>(this))
93	(static_cast<ev_watcher *>(this), events);
94	}
95
96	bool is_active () const
97	{
98	return ev_is_active (static_cast<const ev_watcher *>(this));
99	}
100
101	bool is_pending () const
102	{
103	return ev_is_pending (static_cast<const ev_watcher *>(this));
104	}
105	};
106
107	enum {
108	UNDEF = EV_UNDEF,
109	NONE = EV_NONE,
110	READ = EV_READ,
111	WRITE = EV_WRITE,
112	TIMEOUT = EV_TIMEOUT,
113	PERIODIC = EV_PERIODIC,
114	SIGNAL = EV_SIGNAL,
115	CHILD = EV_CHILD,
116	STAT = EV_STAT,
117	IDLE = EV_IDLE,
118	CHECK = EV_CHECK,
119	PREPARE = EV_PREPARE,
120	FORK = EV_FORK,
121	EMBED = EV_EMBED,
122	ERROR = EV_ERROR,
123	};
124
125	typedef ev_tstamp tstamp;
126
127	inline ev_tstamp now (EV_P)
128	{
129	return ev_now (EV_A);
130	}
131
132	#if EV_MULTIPLICITY
133	#define EV_CONSTRUCT \
134	(EV_P = EV_DEFAULT) \
135	{ \
136	set (EV_A); \
137	}
138	#else
139	#define EV_CONSTRUCT \
140	() \
141	{ \
142	}
143	#endif
144
145	/* using a template here would require quite a bit more lines,
146	* so a macro solution was chosen */
147	#define EV_BEGIN_WATCHER(cppstem,cstem) \
148	\
149	struct cppstem : base<ev_ ## cstem, cppstem> \
150	{ \
151	void start () \
152	{ \
153	ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
154	} \
155	\
156	void stop () \
157	{ \
158	ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
159	} \
160	\
161	cppstem EV_CONSTRUCT \
162	\
163	~cppstem () \
164	{ \
165	stop (); \
166	} \
167	\
168	using base<ev_ ## cstem, cppstem>::set; \
169	\
170	private: \
171	\
172	cppstem (const cppstem &o) \
173	{ /* disabled */ } \
174	\
175	void operator =(const cppstem &o) { /* disabled */ } \
176	\
177	public:
178
179	#define EV_END_WATCHER(cppstem,cstem) \
180	};
181
182	EV_BEGIN_WATCHER (io, io)
183	void set (int fd, int events)
184	{
185	int active = is_active ();
186	if (active) stop ();
187	ev_io_set (static_cast<ev_io *>(this), fd, events);
188	if (active) start ();
189	}
190
191	void set (int events)
192	{
193	int active = is_active ();
194	if (active) stop ();
195	ev_io_set (static_cast<ev_io *>(this), fd, events);
196	if (active) start ();
197	}
198
199	void start (int fd, int events)
200	{
201	set (fd, events);
202	start ();
203	}
204	EV_END_WATCHER (io, io)
205
206	EV_BEGIN_WATCHER (timer, timer)
207	void set (ev_tstamp after, ev_tstamp repeat = 0.)
208	{
209	int active = is_active ();
210	if (active) stop ();
211	ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
212	if (active) start ();
213	}
214
215	void start (ev_tstamp after, ev_tstamp repeat = 0.)
216	{
217	set (after, repeat);
218	start ();
219	}
220
221	void again ()
222	{
223	ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
224	}
225	EV_END_WATCHER (timer, timer)
226
227	#if EV_PERIODIC_ENABLE
228	EV_BEGIN_WATCHER (periodic, periodic)
229	void set (ev_tstamp at, ev_tstamp interval = 0.)
230	{
231	int active = is_active ();
232	if (active) stop ();
233	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
234	if (active) start ();
235	}
236
237	void start (ev_tstamp at, ev_tstamp interval = 0.)
238	{
239	set (at, interval);
240	start ();
241	}
242
243	void again ()
244	{
245	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
246	}
247	EV_END_WATCHER (periodic, periodic)
248	#endif
249
250	EV_BEGIN_WATCHER (sig, signal)
251	void set (int signum)
252	{
253	int active = is_active ();
254	if (active) stop ();
255	ev_signal_set (static_cast<ev_signal *>(this), signum);
256	if (active) start ();
257	}
258
259	void start (int signum)
260	{
261	set (signum);
262	start ();
263	}
264	EV_END_WATCHER (sig, signal)
265
266	EV_BEGIN_WATCHER (child, child)
267	void set (int pid)
268	{
269	int active = is_active ();
270	if (active) stop ();
271	ev_child_set (static_cast<ev_child *>(this), pid);
272	if (active) start ();
273	}
274
275	void start (int pid)
276	{
277	set (pid);
278	start ();
279	}
280	EV_END_WATCHER (child, child)
281
282	#if EV_STAT_ENABLE
283	EV_BEGIN_WATCHER (stat, stat)
284	void set (const char *path, ev_tstamp interval = 0.)
285	{
286	int active = is_active ();
287	if (active) stop ();
288	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
289	if (active) start ();
290	}
291
292	void start (const char *path, ev_tstamp interval = 0.)
293	{
294	stop ();
295	set (path, interval);
296	start ();
297	}
298
299	void update ()
300	{
301	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
302	}
303	EV_END_WATCHER (stat, stat)
304	#endif
305
306	EV_BEGIN_WATCHER (idle, idle)
307	void set () { }
308	EV_END_WATCHER (idle, idle)
309
310	EV_BEGIN_WATCHER (prepare, prepare)
311	void set () { }
312	EV_END_WATCHER (prepare, prepare)
313
314	EV_BEGIN_WATCHER (check, check)
315	void set () { }
316	EV_END_WATCHER (check, check)
317
318	#if EV_EMBED_ENABLE
319	EV_BEGIN_WATCHER (embed, embed)
320	void start (struct ev_loop *embedded_loop)
321	{
322	stop ();
323	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
324	start ();
325	}
326
327	void sweep ()
328	{
329	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
330	}
331	EV_END_WATCHER (embed, embed)
332	#endif
333
334	#if EV_FORK_ENABLE
335	EV_BEGIN_WATCHER (fork, fork)
336	void set () { }
337	EV_END_WATCHER (fork, fork)
338	#endif
339
340	#undef EV_CONSTRUCT
341	#undef EV_BEGIN_WATCHER
342	#undef EV_END_WATCHER
343	}
344
345	#endif
346