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_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_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_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 set ()
    {
      set_ (0, function_thunk<function>);
    }

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

    void operator ()(int events = EV_UNDEF)
    {
      return e_cb (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:	1.13
Committed:	Tue Dec 4 16:23:29 2007 UTC (16 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.12:	+82 -60 lines
Log Message:	complete c++ overhaul
#	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_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_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_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)>
60	void set ()
61	{
62	set_ (0, function_thunk<function>);
63	}
64
65	template<void (*function)(watcher &w, int)>
66	static void function_thunk (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 e_cb (static_cast<ev_watcher *>(this)) (events);
75	}
76
77	bool is_active () const
78	{
79	return ev_is_active (static_cast<const ev_watcher *>(this));
80	}
81
82	bool is_pending () const
83	{
84	return ev_is_pending (static_cast<const ev_watcher *>(this));
85	}
86	};
87
88	enum {
89	UNDEF = EV_UNDEF,
90	NONE = EV_NONE,
91	READ = EV_READ,
92	WRITE = EV_WRITE,
93	TIMEOUT = EV_TIMEOUT,
94	PERIODIC = EV_PERIODIC,
95	SIGNAL = EV_SIGNAL,
96	CHILD = EV_CHILD,
97	STAT = EV_STAT,
98	IDLE = EV_IDLE,
99	CHECK = EV_CHECK,
100	PREPARE = EV_PREPARE,
101	FORK = EV_FORK,
102	EMBED = EV_EMBED,
103	ERROR = EV_ERROR,
104	};
105
106	typedef ev_tstamp tstamp;
107
108	inline ev_tstamp now (EV_P)
109	{
110	return ev_now (EV_A);
111	}
112
113	#if EV_MULTIPLICITY
114	#define EV_CONSTRUCT \
115	(EV_P = EV_DEFAULT) \
116	{ \
117	set (EV_A); \
118	}
119	#else
120	#define EV_CONSTRUCT \
121	() \
122	{ \
123	}
124	#endif
125
126	/* using a template here would require quite a bit more lines,
127	* so a macro solution was chosen */
128	#define EV_BEGIN_WATCHER(cppstem,cstem) \
129	\
130	struct cppstem : base<ev_ ## cstem, cppstem> \
131	{ \
132	void start () \
133	{ \
134	ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
135	} \
136	\
137	void stop () \
138	{ \
139	ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
140	} \
141	\
142	cppstem EV_CONSTRUCT \
143	\
144	~cppstem () \
145	{ \
146	stop (); \
147	} \
148	\
149	using base<ev_ ## cstem, cppstem>::set; \
150	\
151	private: \
152	\
153	cppstem (const cppstem &o) \
154	{ /* disabled */ } \
155	\
156	void operator =(const cppstem &o) { /* disabled */ } \
157	\
158	public:
159
160	#define EV_END_WATCHER(cppstem,cstem) \
161	};
162
163	EV_BEGIN_WATCHER (io, io)
164	void set (int fd, int events)
165	{
166	int active = is_active ();
167	if (active) stop ();
168	ev_io_set (static_cast<ev_io *>(this), fd, events);
169	if (active) start ();
170	}
171
172	void set (int events)
173	{
174	int active = is_active ();
175	if (active) stop ();
176	ev_io_set (static_cast<ev_io *>(this), fd, events);
177	if (active) start ();
178	}
179
180	void start (int fd, int events)
181	{
182	set (fd, events);
183	start ();
184	}
185	EV_END_WATCHER (io, io)
186
187	EV_BEGIN_WATCHER (timer, timer)
188	void set (ev_tstamp after, ev_tstamp repeat = 0.)
189	{
190	int active = is_active ();
191	if (active) stop ();
192	ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
193	if (active) start ();
194	}
195
196	void start (ev_tstamp after, ev_tstamp repeat = 0.)
197	{
198	set (after, repeat);
199	start ();
200	}
201
202	void again ()
203	{
204	ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
205	}
206	EV_END_WATCHER (timer, timer)
207
208	#if EV_PERIODIC_ENABLE
209	EV_BEGIN_WATCHER (periodic, periodic)
210	void set (ev_tstamp at, ev_tstamp interval = 0.)
211	{
212	int active = is_active ();
213	if (active) stop ();
214	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
215	if (active) start ();
216	}
217
218	void start (ev_tstamp at, ev_tstamp interval = 0.)
219	{
220	set (at, interval);
221	start ();
222	}
223
224	void again ()
225	{
226	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
227	}
228	EV_END_WATCHER (periodic, periodic)
229	#endif
230
231	EV_BEGIN_WATCHER (sig, signal)
232	void set (int signum)
233	{
234	int active = is_active ();
235	if (active) stop ();
236	ev_signal_set (static_cast<ev_signal *>(this), signum);
237	if (active) start ();
238	}
239
240	void start (int signum)
241	{
242	set (signum);
243	start ();
244	}
245	EV_END_WATCHER (sig, signal)
246
247	EV_BEGIN_WATCHER (child, child)
248	void set (int pid)
249	{
250	int active = is_active ();
251	if (active) stop ();
252	ev_child_set (static_cast<ev_child *>(this), pid);
253	if (active) start ();
254	}
255
256	void start (int pid)
257	{
258	set (pid);
259	start ();
260	}
261	EV_END_WATCHER (child, child)
262
263	#if EV_STAT_ENABLE
264	EV_BEGIN_WATCHER (stat, stat)
265	void set (const char *path, ev_tstamp interval = 0.)
266	{
267	int active = is_active ();
268	if (active) stop ();
269	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
270	if (active) start ();
271	}
272
273	void start (const char *path, ev_tstamp interval = 0.)
274	{
275	stop ();
276	set (path, interval);
277	start ();
278	}
279
280	void update ()
281	{
282	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
283	}
284	EV_END_WATCHER (stat, stat)
285	#endif
286
287	EV_BEGIN_WATCHER (idle, idle)
288	void set () { }
289	EV_END_WATCHER (idle, idle)
290
291	EV_BEGIN_WATCHER (prepare, prepare)
292	void set () { }
293	EV_END_WATCHER (prepare, prepare)
294
295	EV_BEGIN_WATCHER (check, check)
296	void set () { }
297	EV_END_WATCHER (check, check)
298
299	#if EV_EMBED_ENABLE
300	EV_BEGIN_WATCHER (embed, embed)
301	void start (struct ev_loop *embedded_loop)
302	{
303	stop ();
304	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
305	start ();
306	}
307
308	void sweep ()
309	{
310	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
311	}
312	EV_END_WATCHER (embed, embed)
313	#endif
314
315	#if EV_FORK_ENABLE
316	EV_BEGIN_WATCHER (fork, fork)
317	void set () { }
318	EV_END_WATCHER (fork, fork)
319	#endif
320
321	#undef EV_CONSTRUCT
322	#undef EV_BEGIN_WATCHER
323	#undef EV_END_WATCHER
324	}
325
326	#endif
327