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 *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:	1.19
Committed:	Fri Dec 14 17:47:52 2007 UTC (16 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-1_86, rel-1_85
Changes since 1.18:	+17 -0 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#ifndef EVPP_H__
2			#define EVPP_H__
3
4	root	1.7	#include "ev.h"
5	root	1.1
6			namespace ev {
7
8	root	1.13	template<class ev_watcher, class watcher>
9			struct base : ev_watcher
10	root	1.1	{
11	root	1.13	#if EV_MULTIPLICITY
12			EV_P;
13	root	1.1
14	root	1.13	void set (EV_P)
15			{
16			this->EV_A = EV_A;
17			}
18			#endif
19	root	1.1
20	root	1.13	base ()
21			{
22			ev_init (this, 0);
23			}
24
25	root	1.18	void set_ (void data, void (cb)(EV_P_ ev_watcher *w, int revents))
26	root	1.13	{
27	root	1.17	this->data = data;
28	root	1.18	ev_set_cb (static_cast<ev_watcher *>(this), cb);
29	root	1.13	}
30
31	root	1.19	// method callback
32	root	1.13	template<class K, void (K::*method)(watcher &w, int)>
33			void set (K *object)
34			{
35			set_ (object, method_thunk<K, method>);
36			}
37
38			template<class K, void (K::*method)(watcher &w, int)>
39	root	1.18	static void method_thunk (EV_P_ ev_watcher *w, int revents)
40	root	1.13	{
41	root	1.17	K obj = static_cast<K >(w->data);
42	root	1.18	(obj->method) (static_cast<watcher *>(w), revents);
43	root	1.13	}
44
45	root	1.19	// const method callback
46	root	1.13	template<class K, void (K::*method)(watcher &w, int) const>
47			void set (const K *object)
48			{
49			set_ (object, const_method_thunk<K, method>);
50			}
51
52			template<class K, void (K::*method)(watcher &w, int) const>
53	root	1.18	static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
54	root	1.13	{
55	root	1.17	K obj = static_cast<K >(w->data);
56	root	1.18	(static_cast<K >(w->data)->method) (static_cast<watcher >(w), revents);
57	root	1.13	}
58
59	root	1.19	// function callback
60	root	1.17	template<void (*function)(watcher &w, int)>
61			void set (void *data = 0)
62	root	1.13	{
63	root	1.16	set_ (data, function_thunk<function>);
64	root	1.13	}
65
66			template<void (*function)(watcher &w, int)>
67	root	1.18	static void function_thunk (EV_P_ ev_watcher *w, int revents)
68	root	1.13	{
69	root	1.18	function (static_cast<watcher >(w), revents);
70	root	1.13	}
71
72	root	1.19	// simple callback
73			template<class K, void (K::*method)()>
74			void set (K *object)
75			{
76			set_ (object, method_noargs_thunk<K, method>);
77			}
78
79			template<class K, void (K::*method)()>
80			static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
81			{
82			K obj = static_cast<K >(w->data);
83			(obj->*method) ();
84			}
85
86	root	1.13	void operator ()(int events = EV_UNDEF)
87			{
88	root	1.14	return ev_cb (static_cast<ev_watcher *>(this))
89			(static_cast<ev_watcher *>(this), events);
90	root	1.13	}
91
92			bool is_active () const
93	root	1.1	{
94	root	1.13	return ev_is_active (static_cast<const ev_watcher *>(this));
95	root	1.1	}
96
97	root	1.13	bool is_pending () const
98	root	1.1	{
99	root	1.13	return ev_is_pending (static_cast<const ev_watcher *>(this));
100	root	1.1	}
101			};
102
103	root	1.2	enum {
104			UNDEF = EV_UNDEF,
105			NONE = EV_NONE,
106			READ = EV_READ,
107			WRITE = EV_WRITE,
108			TIMEOUT = EV_TIMEOUT,
109			PERIODIC = EV_PERIODIC,
110			SIGNAL = EV_SIGNAL,
111	root	1.9	CHILD = EV_CHILD,
112			STAT = EV_STAT,
113	root	1.2	IDLE = EV_IDLE,
114			CHECK = EV_CHECK,
115			PREPARE = EV_PREPARE,
116	root	1.9	FORK = EV_FORK,
117			EMBED = EV_EMBED,
118	root	1.2	ERROR = EV_ERROR,
119			};
120
121	root	1.1	typedef ev_tstamp tstamp;
122
123			inline ev_tstamp now (EV_P)
124			{
125			return ev_now (EV_A);
126			}
127
128			#if EV_MULTIPLICITY
129	root	1.13	#define EV_CONSTRUCT \
130			(EV_P = EV_DEFAULT) \
131	root	1.1	{ \
132	root	1.13	set (EV_A); \
133			}
134	root	1.1	#else
135	root	1.13	#define EV_CONSTRUCT \
136			() \
137			{ \
138			}
139	root	1.1	#endif
140
141			/* using a template here would require quite a bit more lines,
142			* so a macro solution was chosen */
143	root	1.4	#define EV_BEGIN_WATCHER(cppstem,cstem) \
144	root	1.1	\
145	root	1.13	struct cppstem : base<ev_ ## cstem, cppstem> \
146	root	1.1	{ \
147			void start () \
148			{ \
149			ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
150			} \
151			\
152			void stop () \
153			{ \
154			ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
155			} \
156			\
157	root	1.13	cppstem EV_CONSTRUCT \
158	root	1.1	\
159	root	1.3	~cppstem () \
160			{ \
161			stop (); \
162			} \
163			\
164	root	1.13	using base<ev_ ## cstem, cppstem>::set; \
165			\
166	root	1.1	private: \
167			\
168			cppstem (const cppstem &o) \
169			{ /* disabled */ } \
170	root	1.6	\
171	root	1.1	void operator =(const cppstem &o) { /* disabled */ } \
172			\
173			public:
174
175	root	1.4	#define EV_END_WATCHER(cppstem,cstem) \
176	root	1.6	};
177	root	1.4
178			EV_BEGIN_WATCHER (io, io)
179	root	1.1	void set (int fd, int events)
180			{
181			int active = is_active ();
182			if (active) stop ();
183			ev_io_set (static_cast<ev_io *>(this), fd, events);
184			if (active) start ();
185			}
186
187			void set (int events)
188			{
189			int active = is_active ();
190			if (active) stop ();
191			ev_io_set (static_cast<ev_io *>(this), fd, events);
192			if (active) start ();
193			}
194
195			void start (int fd, int events)
196			{
197			set (fd, events);
198			start ();
199			}
200	root	1.4	EV_END_WATCHER (io, io)
201	root	1.1
202	root	1.4	EV_BEGIN_WATCHER (timer, timer)
203	root	1.1	void set (ev_tstamp after, ev_tstamp repeat = 0.)
204			{
205			int active = is_active ();
206			if (active) stop ();
207			ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
208			if (active) start ();
209			}
210
211			void start (ev_tstamp after, ev_tstamp repeat = 0.)
212			{
213			set (after, repeat);
214			start ();
215			}
216
217			void again ()
218			{
219			ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
220			}
221	root	1.4	EV_END_WATCHER (timer, timer)
222	root	1.1
223	root	1.8	#if EV_PERIODIC_ENABLE
224	root	1.4	EV_BEGIN_WATCHER (periodic, periodic)
225	root	1.1	void set (ev_tstamp at, ev_tstamp interval = 0.)
226			{
227			int active = is_active ();
228			if (active) stop ();
229			ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
230			if (active) start ();
231			}
232
233			void start (ev_tstamp at, ev_tstamp interval = 0.)
234			{
235			set (at, interval);
236			start ();
237			}
238
239			void again ()
240			{
241			ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
242			}
243	root	1.4	EV_END_WATCHER (periodic, periodic)
244	root	1.3	#endif
245	root	1.1
246	root	1.4	EV_BEGIN_WATCHER (sig, signal)
247	root	1.1	void set (int signum)
248			{
249			int active = is_active ();
250			if (active) stop ();
251			ev_signal_set (static_cast<ev_signal *>(this), signum);
252			if (active) start ();
253			}
254
255			void start (int signum)
256			{
257			set (signum);
258			start ();
259			}
260	root	1.4	EV_END_WATCHER (sig, signal)
261	root	1.1
262	root	1.4	EV_BEGIN_WATCHER (child, child)
263	root	1.1	void set (int pid)
264			{
265			int active = is_active ();
266			if (active) stop ();
267			ev_child_set (static_cast<ev_child *>(this), pid);
268			if (active) start ();
269			}
270
271			void start (int pid)
272			{
273			set (pid);
274			start ();
275			}
276	root	1.4	EV_END_WATCHER (child, child)
277	root	1.1
278	root	1.8	#if EV_STAT_ENABLE
279			EV_BEGIN_WATCHER (stat, stat)
280			void set (const char *path, ev_tstamp interval = 0.)
281			{
282			int active = is_active ();
283			if (active) stop ();
284			ev_stat_set (static_cast<ev_stat *>(this), path, interval);
285			if (active) start ();
286			}
287
288			void start (const char *path, ev_tstamp interval = 0.)
289			{
290	root	1.12	stop ();
291	root	1.8	set (path, interval);
292			start ();
293			}
294
295			void update ()
296			{
297			ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
298			}
299			EV_END_WATCHER (stat, stat)
300			#endif
301
302			EV_BEGIN_WATCHER (idle, idle)
303			void set () { }
304			EV_END_WATCHER (idle, idle)
305	root	1.7
306	root	1.8	EV_BEGIN_WATCHER (prepare, prepare)
307			void set () { }
308			EV_END_WATCHER (prepare, prepare)
309
310			EV_BEGIN_WATCHER (check, check)
311			void set () { }
312			EV_END_WATCHER (check, check)
313
314			#if EV_EMBED_ENABLE
315	root	1.7	EV_BEGIN_WATCHER (embed, embed)
316			void start (struct ev_loop *embedded_loop)
317			{
318	root	1.12	stop ();
319			ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
320	root	1.7	start ();
321			}
322
323			void sweep ()
324			{
325			ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
326			}
327			EV_END_WATCHER (embed, embed)
328			#endif
329
330	root	1.10	#if EV_FORK_ENABLE
331			EV_BEGIN_WATCHER (fork, fork)
332			void set () { }
333			EV_END_WATCHER (fork, fork)
334			#endif
335
336	root	1.1	#undef EV_CONSTRUCT
337	root	1.4	#undef EV_BEGIN_WATCHER
338	root	1.7	#undef EV_END_WATCHER
339	root	1.1	}
340
341			#endif
342