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 *
#	User	Rev	Content
1	root	1.1	#ifndef EVPP_H__
2			#define EVPP_H__
3
4	root	1.20	#ifdef EV_H
5			# include EV_H
6			#else
7			# include <ev.h>
8			#endif
9	root	1.1
10			namespace ev {
11
12	root	1.13	template<class ev_watcher, class watcher>
13			struct base : ev_watcher
14	root	1.1	{
15	root	1.13	#if EV_MULTIPLICITY
16			EV_P;
17	root	1.1
18	root	1.13	void set (EV_P)
19			{
20			this->EV_A = EV_A;
21			}
22			#endif
23	root	1.1
24	root	1.13	base ()
25			{
26			ev_init (this, 0);
27			}
28
29	root	1.18	void set_ (void data, void (cb)(EV_P_ ev_watcher *w, int revents))
30	root	1.13	{
31	root	1.17	this->data = data;
32	root	1.18	ev_set_cb (static_cast<ev_watcher *>(this), cb);
33	root	1.13	}
34
35	root	1.19	// method callback
36	root	1.13	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	root	1.18	static void method_thunk (EV_P_ ev_watcher *w, int revents)
44	root	1.13	{
45	root	1.17	K obj = static_cast<K >(w->data);
46	root	1.18	(obj->method) (static_cast<watcher *>(w), revents);
47	root	1.13	}
48
49	root	1.19	// const method callback
50	root	1.13	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	root	1.18	static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
58	root	1.13	{
59	root	1.17	K obj = static_cast<K >(w->data);
60	root	1.18	(static_cast<K >(w->data)->method) (static_cast<watcher >(w), revents);
61	root	1.13	}
62
63	root	1.19	// function callback
64	root	1.17	template<void (*function)(watcher &w, int)>
65			void set (void *data = 0)
66	root	1.13	{
67	root	1.16	set_ (data, function_thunk<function>);
68	root	1.13	}
69
70			template<void (*function)(watcher &w, int)>
71	root	1.18	static void function_thunk (EV_P_ ev_watcher *w, int revents)
72	root	1.13	{
73	root	1.18	function (static_cast<watcher >(w), revents);
74	root	1.13	}
75
76	root	1.19	// 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	root	1.13	void operator ()(int events = EV_UNDEF)
91			{
92	root	1.14	return ev_cb (static_cast<ev_watcher *>(this))
93			(static_cast<ev_watcher *>(this), events);
94	root	1.13	}
95
96			bool is_active () const
97	root	1.1	{
98	root	1.13	return ev_is_active (static_cast<const ev_watcher *>(this));
99	root	1.1	}
100
101	root	1.13	bool is_pending () const
102	root	1.1	{
103	root	1.13	return ev_is_pending (static_cast<const ev_watcher *>(this));
104	root	1.1	}
105			};
106
107	root	1.2	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	root	1.9	CHILD = EV_CHILD,
116			STAT = EV_STAT,
117	root	1.2	IDLE = EV_IDLE,
118			CHECK = EV_CHECK,
119			PREPARE = EV_PREPARE,
120	root	1.9	FORK = EV_FORK,
121			EMBED = EV_EMBED,
122	root	1.2	ERROR = EV_ERROR,
123			};
124
125	root	1.1	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	root	1.13	#define EV_CONSTRUCT \
134			(EV_P = EV_DEFAULT) \
135	root	1.1	{ \
136	root	1.13	set (EV_A); \
137			}
138	root	1.1	#else
139	root	1.13	#define EV_CONSTRUCT \
140			() \
141			{ \
142			}
143	root	1.1	#endif
144
145			/* using a template here would require quite a bit more lines,
146			* so a macro solution was chosen */
147	root	1.4	#define EV_BEGIN_WATCHER(cppstem,cstem) \
148	root	1.1	\
149	root	1.13	struct cppstem : base<ev_ ## cstem, cppstem> \
150	root	1.1	{ \
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	root	1.13	cppstem EV_CONSTRUCT \
162	root	1.1	\
163	root	1.3	~cppstem () \
164			{ \
165			stop (); \
166			} \
167			\
168	root	1.13	using base<ev_ ## cstem, cppstem>::set; \
169			\
170	root	1.1	private: \
171			\
172			cppstem (const cppstem &o) \
173			{ /* disabled */ } \
174	root	1.6	\
175	root	1.1	void operator =(const cppstem &o) { /* disabled */ } \
176			\
177			public:
178
179	root	1.4	#define EV_END_WATCHER(cppstem,cstem) \
180	root	1.6	};
181	root	1.4
182			EV_BEGIN_WATCHER (io, io)
183	root	1.1	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	root	1.4	EV_END_WATCHER (io, io)
205	root	1.1
206	root	1.4	EV_BEGIN_WATCHER (timer, timer)
207	root	1.1	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	root	1.4	EV_END_WATCHER (timer, timer)
226	root	1.1
227	root	1.8	#if EV_PERIODIC_ENABLE
228	root	1.4	EV_BEGIN_WATCHER (periodic, periodic)
229	root	1.1	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	root	1.4	EV_END_WATCHER (periodic, periodic)
248	root	1.3	#endif
249	root	1.1
250	root	1.4	EV_BEGIN_WATCHER (sig, signal)
251	root	1.1	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	root	1.4	EV_END_WATCHER (sig, signal)
265	root	1.1
266	root	1.4	EV_BEGIN_WATCHER (child, child)
267	root	1.1	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	root	1.4	EV_END_WATCHER (child, child)
281	root	1.1
282	root	1.8	#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	root	1.12	stop ();
295	root	1.8	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	root	1.7
310	root	1.8	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	root	1.7	EV_BEGIN_WATCHER (embed, embed)
320			void start (struct ev_loop *embedded_loop)
321			{
322	root	1.12	stop ();
323			ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
324	root	1.7	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	root	1.10	#if EV_FORK_ENABLE
335			EV_BEGIN_WATCHER (fork, fork)
336			void set () { }
337			EV_END_WATCHER (fork, fork)
338			#endif
339
340	root	1.1	#undef EV_CONSTRUCT
341	root	1.4	#undef EV_BEGIN_WATCHER
342	root	1.7	#undef EV_END_WATCHER
343	root	1.1	}
344
345			#endif
346