libev/ev%2B%2B.h

#ifndef EVPP_H__
#define EVPP_H__

#include "ev.h"

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

    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)
    {
      watcher *self = static_cast<watcher *>(w);
      K *obj = static_cast<K *>(self->data);
      (obj->*method) (*self, revents);
    }

    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)
    {
      watcher *self = static_cast<watcher *>(w);
      K *obj = static_cast<K *>(self->data);
      (obj->*method) (*self, revents);
    }

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

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

    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:	1.16
Committed:	Fri Dec 7 20:13:08 2007 UTC (16 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.15:	+2 -2 lines
Log Message:	document c++ callbacks!
#	Content
1	#ifndef EVPP_H__
2	#define EVPP_H__
3
4	#include "ev.h"
5
6	namespace ev {
7
8	template<class ev_watcher, class watcher>
9	struct base : ev_watcher
10	{
11	#if EV_MULTIPLICITY
12	EV_P;
13
14	void set (EV_P)
15	{
16	this->EV_A = EV_A;
17	}
18	#endif
19
20	base ()
21	{
22	ev_init (this, 0);
23	}
24
25	void set_ (void object, void (cb)(EV_P_ ev_watcher *w, int revents))
26	{
27	this->data = object;
28	ev_set_cb (static_cast<ev_watcher *>(this), cb);
29	}
30
31	template<class K, void (K::*method)(watcher &w, int)>
32	void set (K *object)
33	{
34	set_ (object, method_thunk<K, method>);
35	}
36
37	template<class K, void (K::*method)(watcher &w, int)>
38	static void method_thunk (EV_P_ ev_watcher *w, int revents)
39	{
40	watcher self = static_cast<watcher >(w);
41	K obj = static_cast<K >(self->data);
42	(obj->method) (self, revents);
43	}
44
45	template<class K, void (K::*method)(watcher &w, int) const>
46	void set (const K *object)
47	{
48	set_ (object, const_method_thunk<K, method>);
49	}
50
51	template<class K, void (K::*method)(watcher &w, int) const>
52	static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
53	{
54	watcher self = static_cast<watcher >(w);
55	K obj = static_cast<K >(self->data);
56	(obj->method) (self, revents);
57	}
58
59	template<void (function)(watcher &w, int), void data = 0>
60	void set ()
61	{
62	set_ (data, function_thunk<function>);
63	}
64
65	template<void (*function)(watcher &w, int)>
66	static void function_thunk (EV_P_ ev_watcher *w, int revents)
67	{
68	watcher self = static_cast<watcher >(w);
69	function (*self, revents);
70	}
71
72	void operator ()(int events = EV_UNDEF)
73	{
74	return ev_cb (static_cast<ev_watcher *>(this))
75	(static_cast<ev_watcher *>(this), events);
76	}
77
78	bool is_active () const
79	{
80	return ev_is_active (static_cast<const ev_watcher *>(this));
81	}
82
83	bool is_pending () const
84	{
85	return ev_is_pending (static_cast<const ev_watcher *>(this));
86	}
87	};
88
89	enum {
90	UNDEF = EV_UNDEF,
91	NONE = EV_NONE,
92	READ = EV_READ,
93	WRITE = EV_WRITE,
94	TIMEOUT = EV_TIMEOUT,
95	PERIODIC = EV_PERIODIC,
96	SIGNAL = EV_SIGNAL,
97	CHILD = EV_CHILD,
98	STAT = EV_STAT,
99	IDLE = EV_IDLE,
100	CHECK = EV_CHECK,
101	PREPARE = EV_PREPARE,
102	FORK = EV_FORK,
103	EMBED = EV_EMBED,
104	ERROR = EV_ERROR,
105	};
106
107	typedef ev_tstamp tstamp;
108
109	inline ev_tstamp now (EV_P)
110	{
111	return ev_now (EV_A);
112	}
113
114	#if EV_MULTIPLICITY
115	#define EV_CONSTRUCT \
116	(EV_P = EV_DEFAULT) \
117	{ \
118	set (EV_A); \
119	}
120	#else
121	#define EV_CONSTRUCT \
122	() \
123	{ \
124	}
125	#endif
126
127	/* using a template here would require quite a bit more lines,
128	* so a macro solution was chosen */
129	#define EV_BEGIN_WATCHER(cppstem,cstem) \
130	\
131	struct cppstem : base<ev_ ## cstem, cppstem> \
132	{ \
133	void start () \
134	{ \
135	ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
136	} \
137	\
138	void stop () \
139	{ \
140	ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
141	} \
142	\
143	cppstem EV_CONSTRUCT \
144	\
145	~cppstem () \
146	{ \
147	stop (); \
148	} \
149	\
150	using base<ev_ ## cstem, cppstem>::set; \
151	\
152	private: \
153	\
154	cppstem (const cppstem &o) \
155	{ /* disabled */ } \
156	\
157	void operator =(const cppstem &o) { /* disabled */ } \
158	\
159	public:
160
161	#define EV_END_WATCHER(cppstem,cstem) \
162	};
163
164	EV_BEGIN_WATCHER (io, io)
165	void set (int fd, int events)
166	{
167	int active = is_active ();
168	if (active) stop ();
169	ev_io_set (static_cast<ev_io *>(this), fd, events);
170	if (active) start ();
171	}
172
173	void set (int events)
174	{
175	int active = is_active ();
176	if (active) stop ();
177	ev_io_set (static_cast<ev_io *>(this), fd, events);
178	if (active) start ();
179	}
180
181	void start (int fd, int events)
182	{
183	set (fd, events);
184	start ();
185	}
186	EV_END_WATCHER (io, io)
187
188	EV_BEGIN_WATCHER (timer, timer)
189	void set (ev_tstamp after, ev_tstamp repeat = 0.)
190	{
191	int active = is_active ();
192	if (active) stop ();
193	ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
194	if (active) start ();
195	}
196
197	void start (ev_tstamp after, ev_tstamp repeat = 0.)
198	{
199	set (after, repeat);
200	start ();
201	}
202
203	void again ()
204	{
205	ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
206	}
207	EV_END_WATCHER (timer, timer)
208
209	#if EV_PERIODIC_ENABLE
210	EV_BEGIN_WATCHER (periodic, periodic)
211	void set (ev_tstamp at, ev_tstamp interval = 0.)
212	{
213	int active = is_active ();
214	if (active) stop ();
215	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
216	if (active) start ();
217	}
218
219	void start (ev_tstamp at, ev_tstamp interval = 0.)
220	{
221	set (at, interval);
222	start ();
223	}
224
225	void again ()
226	{
227	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
228	}
229	EV_END_WATCHER (periodic, periodic)
230	#endif
231
232	EV_BEGIN_WATCHER (sig, signal)
233	void set (int signum)
234	{
235	int active = is_active ();
236	if (active) stop ();
237	ev_signal_set (static_cast<ev_signal *>(this), signum);
238	if (active) start ();
239	}
240
241	void start (int signum)
242	{
243	set (signum);
244	start ();
245	}
246	EV_END_WATCHER (sig, signal)
247
248	EV_BEGIN_WATCHER (child, child)
249	void set (int pid)
250	{
251	int active = is_active ();
252	if (active) stop ();
253	ev_child_set (static_cast<ev_child *>(this), pid);
254	if (active) start ();
255	}
256
257	void start (int pid)
258	{
259	set (pid);
260	start ();
261	}
262	EV_END_WATCHER (child, child)
263
264	#if EV_STAT_ENABLE
265	EV_BEGIN_WATCHER (stat, stat)
266	void set (const char *path, ev_tstamp interval = 0.)
267	{
268	int active = is_active ();
269	if (active) stop ();
270	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
271	if (active) start ();
272	}
273
274	void start (const char *path, ev_tstamp interval = 0.)
275	{
276	stop ();
277	set (path, interval);
278	start ();
279	}
280
281	void update ()
282	{
283	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
284	}
285	EV_END_WATCHER (stat, stat)
286	#endif
287
288	EV_BEGIN_WATCHER (idle, idle)
289	void set () { }
290	EV_END_WATCHER (idle, idle)
291
292	EV_BEGIN_WATCHER (prepare, prepare)
293	void set () { }
294	EV_END_WATCHER (prepare, prepare)
295
296	EV_BEGIN_WATCHER (check, check)
297	void set () { }
298	EV_END_WATCHER (check, check)
299
300	#if EV_EMBED_ENABLE
301	EV_BEGIN_WATCHER (embed, embed)
302	void start (struct ev_loop *embedded_loop)
303	{
304	stop ();
305	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
306	start ();
307	}
308
309	void sweep ()
310	{
311	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
312	}
313	EV_END_WATCHER (embed, embed)
314	#endif
315
316	#if EV_FORK_ENABLE
317	EV_BEGIN_WATCHER (fork, fork)
318	void set () { }
319	EV_END_WATCHER (fork, fork)
320	#endif
321
322	#undef EV_CONSTRUCT
323	#undef EV_BEGIN_WATCHER
324	#undef EV_END_WATCHER
325	}
326
327	#endif
328