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_ watcher *w, int revents))
    {
      this->data = data;
      ev_set_cb (static_cast<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_ watcher *w, int revents)
    {
      K *obj = static_cast<K *>(w->data);
      (obj->*method) (*w, 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_ watcher *w, int revents)
    {
      K *obj = static_cast<K *>(w->data);
      (obj->*method) (*w, revents);
    }

    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_ watcher *w, int revents)
    {
      function (*w, 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:	1.17
Committed:	Sat Dec 8 14:27:38 2007 UTC (16 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-1_72
Changes since 1.16:	+13 -16 lines
Log Message:	fix c++ interface
#	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	1.17	void set_ (void data, void (cb)(EV_P_ watcher *w, int revents))
26	root	1.13	{
27	root	1.17	this->data = data;
28			ev_set_cb (static_cast<watcher *>(this), cb);
29	root	1.13	}
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	root	1.17	static void method_thunk (EV_P_ watcher *w, int revents)
39	root	1.13	{
40	root	1.17	K obj = static_cast<K >(w->data);
41			(obj->method) (w, revents);
42	root	1.13	}
43
44			template<class K, void (K::*method)(watcher &w, int) const>
45			void set (const K *object)
46			{
47			set_ (object, const_method_thunk<K, method>);
48			}
49
50			template<class K, void (K::*method)(watcher &w, int) const>
51	root	1.17	static void const_method_thunk (EV_P_ watcher *w, int revents)
52	root	1.13	{
53	root	1.17	K obj = static_cast<K >(w->data);
54			(obj->method) (w, revents);
55	root	1.13	}
56
57	root	1.17	template<void (*function)(watcher &w, int)>
58			void set (void *data = 0)
59	root	1.13	{
60	root	1.16	set_ (data, function_thunk<function>);
61	root	1.13	}
62
63			template<void (*function)(watcher &w, int)>
64	root	1.17	static void function_thunk (EV_P_ watcher *w, int revents)
65	root	1.13	{
66	root	1.17	function (*w, revents);
67	root	1.13	}
68
69			void operator ()(int events = EV_UNDEF)
70			{
71	root	1.14	return ev_cb (static_cast<ev_watcher *>(this))
72			(static_cast<ev_watcher *>(this), events);
73	root	1.13	}
74
75			bool is_active () const
76	root	1.1	{
77	root	1.13	return ev_is_active (static_cast<const ev_watcher *>(this));
78	root	1.1	}
79
80	root	1.13	bool is_pending () const
81	root	1.1	{
82	root	1.13	return ev_is_pending (static_cast<const ev_watcher *>(this));
83	root	1.1	}
84			};
85
86	root	1.2	enum {
87			UNDEF = EV_UNDEF,
88			NONE = EV_NONE,
89			READ = EV_READ,
90			WRITE = EV_WRITE,
91			TIMEOUT = EV_TIMEOUT,
92			PERIODIC = EV_PERIODIC,
93			SIGNAL = EV_SIGNAL,
94	root	1.9	CHILD = EV_CHILD,
95			STAT = EV_STAT,
96	root	1.2	IDLE = EV_IDLE,
97			CHECK = EV_CHECK,
98			PREPARE = EV_PREPARE,
99	root	1.9	FORK = EV_FORK,
100			EMBED = EV_EMBED,
101	root	1.2	ERROR = EV_ERROR,
102			};
103
104	root	1.1	typedef ev_tstamp tstamp;
105
106			inline ev_tstamp now (EV_P)
107			{
108			return ev_now (EV_A);
109			}
110
111			#if EV_MULTIPLICITY
112	root	1.13	#define EV_CONSTRUCT \
113			(EV_P = EV_DEFAULT) \
114	root	1.1	{ \
115	root	1.13	set (EV_A); \
116			}
117	root	1.1	#else
118	root	1.13	#define EV_CONSTRUCT \
119			() \
120			{ \
121			}
122	root	1.1	#endif
123
124			/* using a template here would require quite a bit more lines,
125			* so a macro solution was chosen */
126	root	1.4	#define EV_BEGIN_WATCHER(cppstem,cstem) \
127	root	1.1	\
128	root	1.13	struct cppstem : base<ev_ ## cstem, cppstem> \
129	root	1.1	{ \
130			void start () \
131			{ \
132			ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
133			} \
134			\
135			void stop () \
136			{ \
137			ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
138			} \
139			\
140	root	1.13	cppstem EV_CONSTRUCT \
141	root	1.1	\
142	root	1.3	~cppstem () \
143			{ \
144			stop (); \
145			} \
146			\
147	root	1.13	using base<ev_ ## cstem, cppstem>::set; \
148			\
149	root	1.1	private: \
150			\
151			cppstem (const cppstem &o) \
152			{ /* disabled */ } \
153	root	1.6	\
154	root	1.1	void operator =(const cppstem &o) { /* disabled */ } \
155			\
156			public:
157
158	root	1.4	#define EV_END_WATCHER(cppstem,cstem) \
159	root	1.6	};
160	root	1.4
161			EV_BEGIN_WATCHER (io, io)
162	root	1.1	void set (int fd, int events)
163			{
164			int active = is_active ();
165			if (active) stop ();
166			ev_io_set (static_cast<ev_io *>(this), fd, events);
167			if (active) start ();
168			}
169
170			void set (int events)
171			{
172			int active = is_active ();
173			if (active) stop ();
174			ev_io_set (static_cast<ev_io *>(this), fd, events);
175			if (active) start ();
176			}
177
178			void start (int fd, int events)
179			{
180			set (fd, events);
181			start ();
182			}
183	root	1.4	EV_END_WATCHER (io, io)
184	root	1.1
185	root	1.4	EV_BEGIN_WATCHER (timer, timer)
186	root	1.1	void set (ev_tstamp after, ev_tstamp repeat = 0.)
187			{
188			int active = is_active ();
189			if (active) stop ();
190			ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
191			if (active) start ();
192			}
193
194			void start (ev_tstamp after, ev_tstamp repeat = 0.)
195			{
196			set (after, repeat);
197			start ();
198			}
199
200			void again ()
201			{
202			ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
203			}
204	root	1.4	EV_END_WATCHER (timer, timer)
205	root	1.1
206	root	1.8	#if EV_PERIODIC_ENABLE
207	root	1.4	EV_BEGIN_WATCHER (periodic, periodic)
208	root	1.1	void set (ev_tstamp at, ev_tstamp interval = 0.)
209			{
210			int active = is_active ();
211			if (active) stop ();
212			ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
213			if (active) start ();
214			}
215
216			void start (ev_tstamp at, ev_tstamp interval = 0.)
217			{
218			set (at, interval);
219			start ();
220			}
221
222			void again ()
223			{
224			ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
225			}
226	root	1.4	EV_END_WATCHER (periodic, periodic)
227	root	1.3	#endif
228	root	1.1
229	root	1.4	EV_BEGIN_WATCHER (sig, signal)
230	root	1.1	void set (int signum)
231			{
232			int active = is_active ();
233			if (active) stop ();
234			ev_signal_set (static_cast<ev_signal *>(this), signum);
235			if (active) start ();
236			}
237
238			void start (int signum)
239			{
240			set (signum);
241			start ();
242			}
243	root	1.4	EV_END_WATCHER (sig, signal)
244	root	1.1
245	root	1.4	EV_BEGIN_WATCHER (child, child)
246	root	1.1	void set (int pid)
247			{
248			int active = is_active ();
249			if (active) stop ();
250			ev_child_set (static_cast<ev_child *>(this), pid);
251			if (active) start ();
252			}
253
254			void start (int pid)
255			{
256			set (pid);
257			start ();
258			}
259	root	1.4	EV_END_WATCHER (child, child)
260	root	1.1
261	root	1.8	#if EV_STAT_ENABLE
262			EV_BEGIN_WATCHER (stat, stat)
263			void set (const char *path, ev_tstamp interval = 0.)
264			{
265			int active = is_active ();
266			if (active) stop ();
267			ev_stat_set (static_cast<ev_stat *>(this), path, interval);
268			if (active) start ();
269			}
270
271			void start (const char *path, ev_tstamp interval = 0.)
272			{
273	root	1.12	stop ();
274	root	1.8	set (path, interval);
275			start ();
276			}
277
278			void update ()
279			{
280			ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
281			}
282			EV_END_WATCHER (stat, stat)
283			#endif
284
285			EV_BEGIN_WATCHER (idle, idle)
286			void set () { }
287			EV_END_WATCHER (idle, idle)
288	root	1.7
289	root	1.8	EV_BEGIN_WATCHER (prepare, prepare)
290			void set () { }
291			EV_END_WATCHER (prepare, prepare)
292
293			EV_BEGIN_WATCHER (check, check)
294			void set () { }
295			EV_END_WATCHER (check, check)
296
297			#if EV_EMBED_ENABLE
298	root	1.7	EV_BEGIN_WATCHER (embed, embed)
299			void start (struct ev_loop *embedded_loop)
300			{
301	root	1.12	stop ();
302			ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
303	root	1.7	start ();
304			}
305
306			void sweep ()
307			{
308			ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
309			}
310			EV_END_WATCHER (embed, embed)
311			#endif
312
313	root	1.10	#if EV_FORK_ENABLE
314			EV_BEGIN_WATCHER (fork, fork)
315			void set () { }
316			EV_END_WATCHER (fork, fork)
317			#endif
318
319	root	1.1	#undef EV_CONSTRUCT
320	root	1.4	#undef EV_BEGIN_WATCHER
321	root	1.7	#undef EV_END_WATCHER
322	root	1.1	}
323
324			#endif
325