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
#	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			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	root	1.1	{
79	root	1.13	return ev_is_active (static_cast<const ev_watcher *>(this));
80	root	1.1	}
81
82	root	1.13	bool is_pending () const
83	root	1.1	{
84	root	1.13	return ev_is_pending (static_cast<const ev_watcher *>(this));
85	root	1.1	}
86			};
87
88	root	1.2	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	root	1.9	CHILD = EV_CHILD,
97			STAT = EV_STAT,
98	root	1.2	IDLE = EV_IDLE,
99			CHECK = EV_CHECK,
100			PREPARE = EV_PREPARE,
101	root	1.9	FORK = EV_FORK,
102			EMBED = EV_EMBED,
103	root	1.2	ERROR = EV_ERROR,
104			};
105
106	root	1.1	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	root	1.13	#define EV_CONSTRUCT \
115			(EV_P = EV_DEFAULT) \
116	root	1.1	{ \
117	root	1.13	set (EV_A); \
118			}
119	root	1.1	#else
120	root	1.13	#define EV_CONSTRUCT \
121			() \
122			{ \
123			}
124	root	1.1	#endif
125
126			/* using a template here would require quite a bit more lines,
127			* so a macro solution was chosen */
128	root	1.4	#define EV_BEGIN_WATCHER(cppstem,cstem) \
129	root	1.1	\
130	root	1.13	struct cppstem : base<ev_ ## cstem, cppstem> \
131	root	1.1	{ \
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	root	1.13	cppstem EV_CONSTRUCT \
143	root	1.1	\
144	root	1.3	~cppstem () \
145			{ \
146			stop (); \
147			} \
148			\
149	root	1.13	using base<ev_ ## cstem, cppstem>::set; \
150			\
151	root	1.1	private: \
152			\
153			cppstem (const cppstem &o) \
154			{ /* disabled */ } \
155	root	1.6	\
156	root	1.1	void operator =(const cppstem &o) { /* disabled */ } \
157			\
158			public:
159
160	root	1.4	#define EV_END_WATCHER(cppstem,cstem) \
161	root	1.6	};
162	root	1.4
163			EV_BEGIN_WATCHER (io, io)
164	root	1.1	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	root	1.4	EV_END_WATCHER (io, io)
186	root	1.1
187	root	1.4	EV_BEGIN_WATCHER (timer, timer)
188	root	1.1	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	root	1.4	EV_END_WATCHER (timer, timer)
207	root	1.1
208	root	1.8	#if EV_PERIODIC_ENABLE
209	root	1.4	EV_BEGIN_WATCHER (periodic, periodic)
210	root	1.1	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	root	1.4	EV_END_WATCHER (periodic, periodic)
229	root	1.3	#endif
230	root	1.1
231	root	1.4	EV_BEGIN_WATCHER (sig, signal)
232	root	1.1	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	root	1.4	EV_END_WATCHER (sig, signal)
246	root	1.1
247	root	1.4	EV_BEGIN_WATCHER (child, child)
248	root	1.1	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	root	1.4	EV_END_WATCHER (child, child)
262	root	1.1
263	root	1.8	#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	root	1.12	stop ();
276	root	1.8	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	root	1.7
291	root	1.8	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	root	1.7	EV_BEGIN_WATCHER (embed, embed)
301			void start (struct ev_loop *embedded_loop)
302			{
303	root	1.12	stop ();
304			ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
305	root	1.7	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	root	1.10	#if EV_FORK_ENABLE
316			EV_BEGIN_WATCHER (fork, fork)
317			void set () { }
318			EV_END_WATCHER (fork, fork)
319			#endif
320
321	root	1.1	#undef EV_CONSTRUCT
322	root	1.4	#undef EV_BEGIN_WATCHER
323	root	1.7	#undef EV_END_WATCHER
324	root	1.1	}
325
326			#endif
327