libev/ev%2B%2B.h

/*
 * libev simple C++ wrapper classes
 *
 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modifica-
 * tion, are permitted provided that the following conditions are met:
 * 
 *   1.  Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 * 
 *   2.  Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Alternatively, the contents of this file may be used under the terms of
 * the GNU General Public License ("GPL") version 2 or any later version,
 * in which case the provisions of the GPL are applicable instead of
 * the above. If you wish to allow the use of your version of this file
 * only under the terms of the GPL and not to allow others to use your
 * version of this file under the BSD license, indicate your decision
 * by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL. If you do not delete the
 * provisions above, a recipient may use your version of this file under
 * either the BSD or the GPL.
 */

#ifndef EVPP_H__
#define EVPP_H__

#ifdef EV_H
# include EV_H
#else
# include "ev.h"
#endif

namespace ev {

  typedef ev_tstamp tstamp;

  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,
  };

  enum
  {
    AUTO = EVFLAG_AUTO,
    NOENV = EVFLAG_NOENV,
    FORKCHECK = EVFLAG_FORKCHECK,
    SELECT = EVBACKEND_SELECT,
    POLL = EVBACKEND_POLL,
    EPOLL = EVBACKEND_EPOLL,
    KQUEUE = EVBACKEND_KQUEUE,
    DEVPOLL = EVBACKEND_DEVPOLL,
    PORT = EVBACKEND_PORT
  };

  enum
  {
    NONBLOCK = EVLOOP_NONBLOCK,
    ONESHOT = EVLOOP_ONESHOT
  };

  enum how_t
  {
    ONE = EVUNLOOP_ONE,
    ALL = EVUNLOOP_ALL
  };

#ifdef EV_AX
#  undef EV_AX
#endif

#ifdef EV_AX_
#  undef EV_AX_
#endif

#if EV_MULTIPLICITY
#  define EV_AX  raw_loop
#  define EV_AX_ raw_loop,
#else
#  define EV_AX
#  define EV_AX_
#endif

  struct loop_ref
  {

    loop_ref (EV_P)
#if EV_MULTIPLICITY
      : EV_AX (EV_A)
#endif
    {
    }

    bool operator== (const loop_ref &other) const
    {
#if EV_MULTIPLICITY
      return this->EV_AX == other.EV_AX;
#else
      return true;
#endif
    }

    bool operator!= (const loop_ref &other) const
    {
#if EV_MULTIPLICITY
      return ! (*this == other);
#else
      return false;
#endif
    }

#if EV_MULTIPLICITY
    bool operator== (struct ev_loop *other) const
    {
      return this->EV_AX == other;
    }

    bool operator!= (struct ev_loop *other) const
    {
      return ! (*this == other);
    }

    bool operator== (const struct ev_loop *other) const
    {
      return this->EV_AX == other;
    }

    bool operator!= (const struct ev_loop *other) const
    {
      return (*this == other);
    }

    operator struct ev_loop * () const
    {
      return EV_AX;
    }

    operator const struct ev_loop * () const
    {
      return EV_AX;
    }

    bool is_default () const
    {
      return EV_AX == ev_default_loop (0);
    }
#endif

    void loop (int flags = 0)
    {
      ev_loop (EV_AX_ flags);
    }

    void unloop (how_t how = ONE)
    {
      ev_unloop (EV_AX_ how);
    }

    void post_fork ()
    {
#if EV_MULTIPLICITY
      ev_loop_fork (EV_AX);
#else
      ev_default_fork ();
#endif
    }

    unsigned int count () const
    {
      return ev_loop_count (EV_AX);
    }

    unsigned int backend () const
    {
      return ev_backend (EV_AX);
    }

    tstamp now () const
    {
      return ev_now (EV_AX);
    }

    void ref ()
    {
      ev_ref (EV_AX);
    }

    void unref ()
    {
      ev_unref (EV_AX);
    }

    void set_io_collect_interval (tstamp interval)
    {
      ev_set_io_collect_interval (EV_AX_ interval);
    }

    void set_timeout_collect_interval (tstamp interval)
    {
      ev_set_timeout_collect_interval (EV_AX_ interval);
    }

    // function callback
    void once (int fd, int events, tstamp timeout, void (*cb)(int, void *), void* arg = 0)
    {
      ev_once (EV_AX_ fd, events, timeout, cb, arg);
    }

    // method callback
    template<class K, void (K::*method)(int)>
    void once (int fd, int events, tstamp timeout, K *object)
    {
      once (fd, events, timeout, method_thunk<K, method>, object);
    }

    template<class K, void (K::*method)(int)>
    static void method_thunk (int revents, void* arg)
    {
      K *obj = static_cast<K *>(arg);
      (obj->*method) (revents);
    }

    // const method callback
    template<class K, void (K::*method)(int) const>
    void once (int fd, int events, tstamp timeout, const K *object)
    {
      once (fd, events, timeout, const_method_thunk<K, method>, object);
    }

    template<class K, void (K::*method)(int) const>
    static void const_method_thunk (int revents, void* arg)
    {
      K *obj = static_cast<K *>(arg);
      (obj->*method) (revents);
    }

    // simple method callback
    template<class K, void (K::*method)()>
    void once (int fd, int events, tstamp timeout, K *object)
    {
      once (fd, events, timeout, method_noargs_thunk<K, method>, object);
    }

    template<class K, void (K::*method)()>
    static void method_noargs_thunk (int revents, void* arg)
    {
      K *obj = static_cast<K *>(arg);
      (obj->*method) ();
    }

    // simpler function callback
    template<void (*cb)(int)>
    void once (int fd, int events, tstamp timeout)
    {
      once (fd, events, timeout, simpler_func_thunk<cb>);
    }

    template<void (*cb)(int)>
    static void simpler_func_thunk (int revents, void* arg)
    {
      (*cb) (revents);
    }

    // simplest function callback
    template<void (*cb)()>
    void once (int fd, int events, tstamp timeout)
    {
      once (fd, events, timeout, simplest_func_thunk<cb>);
    }

    template<void (*cb)()>
    static void simplest_func_thunk (int revents, void* arg)
    {
      (*cb) ();
    }

    void feed_fd_event (int fd, int revents)
    {
      ev_feed_fd_event (EV_AX_ fd, revents);
    }

    void feed_signal_event (int signum)
    {
      ev_feed_signal_event (EV_AX_ signum);
    }

#if EV_MULTIPLICITY
    struct ev_loop* EV_AX;
#endif

  };

#if EV_MULTIPLICITY
  struct dynamic_loop: loop_ref
  {

    dynamic_loop (unsigned int flags = AUTO)
      : loop_ref (ev_loop_new (flags))
    {
    }

    ~dynamic_loop ()
    {
      ev_loop_destroy (EV_AX);
      EV_AX = 0;
    }

  private:

    dynamic_loop (const dynamic_loop &);

    dynamic_loop & operator= (const dynamic_loop &);

  };
#endif

  struct default_loop: loop_ref
  {

    default_loop (unsigned int flags = AUTO)
#if EV_MULTIPLICITY
      : loop_ref (ev_default_loop (flags))
    {
    }
#else
    {
      ev_default_loop (flags);
    }
#endif

    ~default_loop ()
    {
      ev_default_destroy ();
#if EV_MULTIPLICITY
      EV_AX = 0;
#endif
    }

  private:

    default_loop (const default_loop &);

    default_loop & operator= (const default_loop &);

  };

  inline loop_ref get_default_loop ()
  {
#if EV_MULTIPLICITY
    return ev_default_loop (0);
#else
    return loop_ref ();
#endif
  }

#undef EV_AX
#undef EV_AX_

#undef EV_PX
#undef EV_PX_
#if EV_MULTIPLICITY
#  define EV_PX  loop_ref EV_A
#  define EV_PX_ loop_ref EV_A_
#else
#  define EV_PX
#  define EV_PX_
#endif

  template<class ev_watcher, class watcher>
  struct base : ev_watcher
  {
    #if EV_MULTIPLICITY
      EV_PX;

      void set (EV_PX)
      {
        this->EV_A = EV_A;
      }
    #endif

    base (EV_PX)
    #if EV_MULTIPLICITY
      : EV_A (EV_A)
    #endif
    {
      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));
    }

    void feed_event (int revents)
    {
      ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
    }
  };

  inline void delay (tstamp interval)
  {
    ev_sleep (interval);
  }

  inline int version_major ()
  {
    return ev_version_major ();
  }

  inline int version_minor ()
  {
    return ev_version_minor ();
  }

  inline unsigned int supported_backends ()
  {
    return ev_supported_backends ();
  }

  inline unsigned int recommended_backends ()
  {
    return ev_recommended_backends ();
  }

  inline unsigned int embeddable_backends ()
  {
    return ev_embeddable_backends ();
  }

  inline void set_allocator (void *(*cb)(void *ptr, long size))
  {
    ev_set_allocator (cb);
  }

  inline void set_syserr_cb (void (*cb)(const char *msg))
  {
    ev_set_syserr_cb (cb);
  }

  #if EV_MULTIPLICITY
    #define EV_CONSTRUCT(cppstem,cstem)                                                 \
      (EV_PX = get_default_loop ())                                                     \
        : base<ev_ ## cstem, cppstem> (EV_A)                                            \
      {                                                                                 \
      }
  #else
    #define EV_CONSTRUCT(cppstem,cstem)                                                 \
      ()                                                                                \
      {                                                                                 \
      }
  #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,cstem)                                                 \
                                                                                        \
    ~cppstem ()                                                                         \
    {                                                                                   \
      stop ();                                                                          \
    }                                                                                   \
                                                                                        \
    using base<ev_ ## cstem, cppstem>::set;                                             \
                                                                                        \
  private:                                                                              \
                                                                                        \
    cppstem (const cppstem &o);                                                         \
                                                                                        \
    cppstem & operator =(const cppstem &o);                                             \
                                                                                        \
  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_PX
  #undef EV_PX_
  #undef EV_CONSTRUCT
  #undef EV_BEGIN_WATCHER
  #undef EV_END_WATCHER

}

#endif

Revision:	1.28
Committed:	Fri Jan 18 18:14:41 2008 UTC (16 years, 3 months ago) by llucax
Content type:	text/plain
Branch:	MAIN
Changes since 1.27:	+315 -14 lines
Log Message:	Add loop wrappers to C++ interface. 3 new classes are provided: loop_ref, dynamic_loop and default_loop. loop_ref has value semantics and is just a pointer wrapper (but with reference syntax). You can change a ev_loop* for a loop_ref and vice-versa without notice. You can create (or asign) a loop_ref from a ev_loop* and you can cast a loop_ref to a ev_loop*. You can check for equality between loop_refs and ev_loop pointers. No clean-up is done by a loop_ref. dynamic_loop and default_loop have both reference semantics (they are non-copiable and non-assignable), and provide automatic destruction.
#	Content
1	/*
2	* libev simple C++ wrapper classes
3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.
6	*
7	* Redistribution and use in source and binary forms, with or without modifica-
8	* tion, are permitted provided that the following conditions are met:
9	*
10	* 1. Redistributions of source code must retain the above copyright notice,
11	* this list of conditions and the following disclaimer.
12	*
13	* 2. Redistributions in binary form must reproduce the above copyright
14	* notice, this list of conditions and the following disclaimer in the
15	* documentation and/or other materials provided with the distribution.
16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26	* OF THE POSSIBILITY OF SUCH DAMAGE.
27	*
28	* Alternatively, the contents of this file may be used under the terms of
29	* the GNU General Public License ("GPL") version 2 or any later version,
30	* in which case the provisions of the GPL are applicable instead of
31	* the above. If you wish to allow the use of your version of this file
32	* only under the terms of the GPL and not to allow others to use your
33	* version of this file under the BSD license, indicate your decision
34	* by deleting the provisions above and replace them with the notice
35	* and other provisions required by the GPL. If you do not delete the
36	* provisions above, a recipient may use your version of this file under
37	* either the BSD or the GPL.
38	*/
39
40	#ifndef EVPP_H__
41	#define EVPP_H__
42
43	#ifdef EV_H
44	# include EV_H
45	#else
46	# include "ev.h"
47	#endif
48
49	namespace ev {
50
51	typedef ev_tstamp tstamp;
52
53	enum {
54	UNDEF = EV_UNDEF,
55	NONE = EV_NONE,
56	READ = EV_READ,
57	WRITE = EV_WRITE,
58	TIMEOUT = EV_TIMEOUT,
59	PERIODIC = EV_PERIODIC,
60	SIGNAL = EV_SIGNAL,
61	CHILD = EV_CHILD,
62	STAT = EV_STAT,
63	IDLE = EV_IDLE,
64	CHECK = EV_CHECK,
65	PREPARE = EV_PREPARE,
66	FORK = EV_FORK,
67	EMBED = EV_EMBED,
68	ERROR = EV_ERROR,
69	};
70
71	enum
72	{
73	AUTO = EVFLAG_AUTO,
74	NOENV = EVFLAG_NOENV,
75	FORKCHECK = EVFLAG_FORKCHECK,
76	SELECT = EVBACKEND_SELECT,
77	POLL = EVBACKEND_POLL,
78	EPOLL = EVBACKEND_EPOLL,
79	KQUEUE = EVBACKEND_KQUEUE,
80	DEVPOLL = EVBACKEND_DEVPOLL,
81	PORT = EVBACKEND_PORT
82	};
83
84	enum
85	{
86	NONBLOCK = EVLOOP_NONBLOCK,
87	ONESHOT = EVLOOP_ONESHOT
88	};
89
90	enum how_t
91	{
92	ONE = EVUNLOOP_ONE,
93	ALL = EVUNLOOP_ALL
94	};
95
96	#ifdef EV_AX
97	# undef EV_AX
98	#endif
99
100	#ifdef EV_AX_
101	# undef EV_AX_
102	#endif
103
104	#if EV_MULTIPLICITY
105	# define EV_AX raw_loop
106	# define EV_AX_ raw_loop,
107	#else
108	# define EV_AX
109	# define EV_AX_
110	#endif
111
112	struct loop_ref
113	{
114
115	loop_ref (EV_P)
116	#if EV_MULTIPLICITY
117	: EV_AX (EV_A)
118	#endif
119	{
120	}
121
122	bool operator== (const loop_ref &other) const
123	{
124	#if EV_MULTIPLICITY
125	return this->EV_AX == other.EV_AX;
126	#else
127	return true;
128	#endif
129	}
130
131	bool operator!= (const loop_ref &other) const
132	{
133	#if EV_MULTIPLICITY
134	return ! (*this == other);
135	#else
136	return false;
137	#endif
138	}
139
140	#if EV_MULTIPLICITY
141	bool operator== (struct ev_loop *other) const
142	{
143	return this->EV_AX == other;
144	}
145
146	bool operator!= (struct ev_loop *other) const
147	{
148	return ! (*this == other);
149	}
150
151	bool operator== (const struct ev_loop *other) const
152	{
153	return this->EV_AX == other;
154	}
155
156	bool operator!= (const struct ev_loop *other) const
157	{
158	return (*this == other);
159	}
160
161	operator struct ev_loop * () const
162	{
163	return EV_AX;
164	}
165
166	operator const struct ev_loop * () const
167	{
168	return EV_AX;
169	}
170
171	bool is_default () const
172	{
173	return EV_AX == ev_default_loop (0);
174	}
175	#endif
176
177	void loop (int flags = 0)
178	{
179	ev_loop (EV_AX_ flags);
180	}
181
182	void unloop (how_t how = ONE)
183	{
184	ev_unloop (EV_AX_ how);
185	}
186
187	void post_fork ()
188	{
189	#if EV_MULTIPLICITY
190	ev_loop_fork (EV_AX);
191	#else
192	ev_default_fork ();
193	#endif
194	}
195
196	unsigned int count () const
197	{
198	return ev_loop_count (EV_AX);
199	}
200
201	unsigned int backend () const
202	{
203	return ev_backend (EV_AX);
204	}
205
206	tstamp now () const
207	{
208	return ev_now (EV_AX);
209	}
210
211	void ref ()
212	{
213	ev_ref (EV_AX);
214	}
215
216	void unref ()
217	{
218	ev_unref (EV_AX);
219	}
220
221	void set_io_collect_interval (tstamp interval)
222	{
223	ev_set_io_collect_interval (EV_AX_ interval);
224	}
225
226	void set_timeout_collect_interval (tstamp interval)
227	{
228	ev_set_timeout_collect_interval (EV_AX_ interval);
229	}
230
231	// function callback
232	void once (int fd, int events, tstamp timeout, void (cb)(int, void ), void* arg = 0)
233	{
234	ev_once (EV_AX_ fd, events, timeout, cb, arg);
235	}
236
237	// method callback
238	template<class K, void (K::*method)(int)>
239	void once (int fd, int events, tstamp timeout, K *object)
240	{
241	once (fd, events, timeout, method_thunk<K, method>, object);
242	}
243
244	template<class K, void (K::*method)(int)>
245	static void method_thunk (int revents, void* arg)
246	{
247	K obj = static_cast<K >(arg);
248	(obj->*method) (revents);
249	}
250
251	// const method callback
252	template<class K, void (K::*method)(int) const>
253	void once (int fd, int events, tstamp timeout, const K *object)
254	{
255	once (fd, events, timeout, const_method_thunk<K, method>, object);
256	}
257
258	template<class K, void (K::*method)(int) const>
259	static void const_method_thunk (int revents, void* arg)
260	{
261	K obj = static_cast<K >(arg);
262	(obj->*method) (revents);
263	}
264
265	// simple method callback
266	template<class K, void (K::*method)()>
267	void once (int fd, int events, tstamp timeout, K *object)
268	{
269	once (fd, events, timeout, method_noargs_thunk<K, method>, object);
270	}
271
272	template<class K, void (K::*method)()>
273	static void method_noargs_thunk (int revents, void* arg)
274	{
275	K obj = static_cast<K >(arg);
276	(obj->*method) ();
277	}
278
279	// simpler function callback
280	template<void (*cb)(int)>
281	void once (int fd, int events, tstamp timeout)
282	{
283	once (fd, events, timeout, simpler_func_thunk<cb>);
284	}
285
286	template<void (*cb)(int)>
287	static void simpler_func_thunk (int revents, void* arg)
288	{
289	(*cb) (revents);
290	}
291
292	// simplest function callback
293	template<void (*cb)()>
294	void once (int fd, int events, tstamp timeout)
295	{
296	once (fd, events, timeout, simplest_func_thunk<cb>);
297	}
298
299	template<void (*cb)()>
300	static void simplest_func_thunk (int revents, void* arg)
301	{
302	(*cb) ();
303	}
304
305	void feed_fd_event (int fd, int revents)
306	{
307	ev_feed_fd_event (EV_AX_ fd, revents);
308	}
309
310	void feed_signal_event (int signum)
311	{
312	ev_feed_signal_event (EV_AX_ signum);
313	}
314
315	#if EV_MULTIPLICITY
316	struct ev_loop* EV_AX;
317	#endif
318
319	};
320
321	#if EV_MULTIPLICITY
322	struct dynamic_loop: loop_ref
323	{
324
325	dynamic_loop (unsigned int flags = AUTO)
326	: loop_ref (ev_loop_new (flags))
327	{
328	}
329
330	~dynamic_loop ()
331	{
332	ev_loop_destroy (EV_AX);
333	EV_AX = 0;
334	}
335
336	private:
337
338	dynamic_loop (const dynamic_loop &);
339
340	dynamic_loop & operator= (const dynamic_loop &);
341
342	};
343	#endif
344
345	struct default_loop: loop_ref
346	{
347
348	default_loop (unsigned int flags = AUTO)
349	#if EV_MULTIPLICITY
350	: loop_ref (ev_default_loop (flags))
351	{
352	}
353	#else
354	{
355	ev_default_loop (flags);
356	}
357	#endif
358
359	~default_loop ()
360	{
361	ev_default_destroy ();
362	#if EV_MULTIPLICITY
363	EV_AX = 0;
364	#endif
365	}
366
367	private:
368
369	default_loop (const default_loop &);
370
371	default_loop & operator= (const default_loop &);
372
373	};
374
375	inline loop_ref get_default_loop ()
376	{
377	#if EV_MULTIPLICITY
378	return ev_default_loop (0);
379	#else
380	return loop_ref ();
381	#endif
382	}
383
384	#undef EV_AX
385	#undef EV_AX_
386
387	#undef EV_PX
388	#undef EV_PX_
389	#if EV_MULTIPLICITY
390	# define EV_PX loop_ref EV_A
391	# define EV_PX_ loop_ref EV_A_
392	#else
393	# define EV_PX
394	# define EV_PX_
395	#endif
396
397	template<class ev_watcher, class watcher>
398	struct base : ev_watcher
399	{
400	#if EV_MULTIPLICITY
401	EV_PX;
402
403	void set (EV_PX)
404	{
405	this->EV_A = EV_A;
406	}
407	#endif
408
409	base (EV_PX)
410	#if EV_MULTIPLICITY
411	: EV_A (EV_A)
412	#endif
413	{
414	ev_init (this, 0);
415	}
416
417	void set_ (void data, void (cb)(EV_P_ ev_watcher *w, int revents))
418	{
419	this->data = data;
420	ev_set_cb (static_cast<ev_watcher *>(this), cb);
421	}
422
423	// method callback
424	template<class K, void (K::*method)(watcher &w, int)>
425	void set (K *object)
426	{
427	set_ (object, method_thunk<K, method>);
428	}
429
430	template<class K, void (K::*method)(watcher &w, int)>
431	static void method_thunk (EV_P_ ev_watcher *w, int revents)
432	{
433	K obj = static_cast<K >(w->data);
434	(obj->method) (static_cast<watcher *>(w), revents);
435	}
436
437	// const method callback
438	template<class K, void (K::*method)(watcher &w, int) const>
439	void set (const K *object)
440	{
441	set_ (object, const_method_thunk<K, method>);
442	}
443
444	template<class K, void (K::*method)(watcher &w, int) const>
445	static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
446	{
447	K obj = static_cast<K >(w->data);
448	(static_cast<K >(w->data)->method) (static_cast<watcher >(w), revents);
449	}
450
451	// function callback
452	template<void (*function)(watcher &w, int)>
453	void set (void *data = 0)
454	{
455	set_ (data, function_thunk<function>);
456	}
457
458	template<void (*function)(watcher &w, int)>
459	static void function_thunk (EV_P_ ev_watcher *w, int revents)
460	{
461	function (static_cast<watcher >(w), revents);
462	}
463
464	// simple callback
465	template<class K, void (K::*method)()>
466	void set (K *object)
467	{
468	set_ (object, method_noargs_thunk<K, method>);
469	}
470
471	template<class K, void (K::*method)()>
472	static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
473	{
474	K obj = static_cast<K >(w->data);
475	(obj->*method) ();
476	}
477
478	void operator ()(int events = EV_UNDEF)
479	{
480	return ev_cb (static_cast<ev_watcher *>(this))
481	(static_cast<ev_watcher *>(this), events);
482	}
483
484	bool is_active () const
485	{
486	return ev_is_active (static_cast<const ev_watcher *>(this));
487	}
488
489	bool is_pending () const
490	{
491	return ev_is_pending (static_cast<const ev_watcher *>(this));
492	}
493
494	void feed_event (int revents)
495	{
496	ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
497	}
498	};
499
500	inline void delay (tstamp interval)
501	{
502	ev_sleep (interval);
503	}
504
505	inline int version_major ()
506	{
507	return ev_version_major ();
508	}
509
510	inline int version_minor ()
511	{
512	return ev_version_minor ();
513	}
514
515	inline unsigned int supported_backends ()
516	{
517	return ev_supported_backends ();
518	}
519
520	inline unsigned int recommended_backends ()
521	{
522	return ev_recommended_backends ();
523	}
524
525	inline unsigned int embeddable_backends ()
526	{
527	return ev_embeddable_backends ();
528	}
529
530	inline void set_allocator (void (cb)(void *ptr, long size))
531	{
532	ev_set_allocator (cb);
533	}
534
535	inline void set_syserr_cb (void (cb)(const char msg))
536	{
537	ev_set_syserr_cb (cb);
538	}
539
540	#if EV_MULTIPLICITY
541	#define EV_CONSTRUCT(cppstem,cstem) \
542	(EV_PX = get_default_loop ()) \
543	: base<ev_ ## cstem, cppstem> (EV_A) \
544	{ \
545	}
546	#else
547	#define EV_CONSTRUCT(cppstem,cstem) \
548	() \
549	{ \
550	}
551	#endif
552
553	/* using a template here would require quite a bit more lines,
554	* so a macro solution was chosen */
555	#define EV_BEGIN_WATCHER(cppstem,cstem) \
556	\
557	struct cppstem : base<ev_ ## cstem, cppstem> \
558	{ \
559	void start () \
560	{ \
561	ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
562	} \
563	\
564	void stop () \
565	{ \
566	ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
567	} \
568	\
569	cppstem EV_CONSTRUCT(cppstem,cstem) \
570	\
571	~cppstem () \
572	{ \
573	stop (); \
574	} \
575	\
576	using base<ev_ ## cstem, cppstem>::set; \
577	\
578	private: \
579	\
580	cppstem (const cppstem &o); \
581	\
582	cppstem & operator =(const cppstem &o); \
583	\
584	public:
585
586	#define EV_END_WATCHER(cppstem,cstem) \
587	};
588
589	EV_BEGIN_WATCHER (io, io)
590	void set (int fd, int events)
591	{
592	int active = is_active ();
593	if (active) stop ();
594	ev_io_set (static_cast<ev_io *>(this), fd, events);
595	if (active) start ();
596	}
597
598	void set (int events)
599	{
600	int active = is_active ();
601	if (active) stop ();
602	ev_io_set (static_cast<ev_io *>(this), fd, events);
603	if (active) start ();
604	}
605
606	void start (int fd, int events)
607	{
608	set (fd, events);
609	start ();
610	}
611	EV_END_WATCHER (io, io)
612
613	EV_BEGIN_WATCHER (timer, timer)
614	void set (ev_tstamp after, ev_tstamp repeat = 0.)
615	{
616	int active = is_active ();
617	if (active) stop ();
618	ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
619	if (active) start ();
620	}
621
622	void start (ev_tstamp after, ev_tstamp repeat = 0.)
623	{
624	set (after, repeat);
625	start ();
626	}
627
628	void again ()
629	{
630	ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
631	}
632	EV_END_WATCHER (timer, timer)
633
634	#if EV_PERIODIC_ENABLE
635	EV_BEGIN_WATCHER (periodic, periodic)
636	void set (ev_tstamp at, ev_tstamp interval = 0.)
637	{
638	int active = is_active ();
639	if (active) stop ();
640	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
641	if (active) start ();
642	}
643
644	void start (ev_tstamp at, ev_tstamp interval = 0.)
645	{
646	set (at, interval);
647	start ();
648	}
649
650	void again ()
651	{
652	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
653	}
654	EV_END_WATCHER (periodic, periodic)
655	#endif
656
657	EV_BEGIN_WATCHER (sig, signal)
658	void set (int signum)
659	{
660	int active = is_active ();
661	if (active) stop ();
662	ev_signal_set (static_cast<ev_signal *>(this), signum);
663	if (active) start ();
664	}
665
666	void start (int signum)
667	{
668	set (signum);
669	start ();
670	}
671	EV_END_WATCHER (sig, signal)
672
673	EV_BEGIN_WATCHER (child, child)
674	void set (int pid)
675	{
676	int active = is_active ();
677	if (active) stop ();
678	ev_child_set (static_cast<ev_child *>(this), pid);
679	if (active) start ();
680	}
681
682	void start (int pid)
683	{
684	set (pid);
685	start ();
686	}
687	EV_END_WATCHER (child, child)
688
689	#if EV_STAT_ENABLE
690	EV_BEGIN_WATCHER (stat, stat)
691	void set (const char *path, ev_tstamp interval = 0.)
692	{
693	int active = is_active ();
694	if (active) stop ();
695	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
696	if (active) start ();
697	}
698
699	void start (const char *path, ev_tstamp interval = 0.)
700	{
701	stop ();
702	set (path, interval);
703	start ();
704	}
705
706	void update ()
707	{
708	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
709	}
710	EV_END_WATCHER (stat, stat)
711	#endif
712
713	EV_BEGIN_WATCHER (idle, idle)
714	void set () { }
715	EV_END_WATCHER (idle, idle)
716
717	EV_BEGIN_WATCHER (prepare, prepare)
718	void set () { }
719	EV_END_WATCHER (prepare, prepare)
720
721	EV_BEGIN_WATCHER (check, check)
722	void set () { }
723	EV_END_WATCHER (check, check)
724
725	#if EV_EMBED_ENABLE
726	EV_BEGIN_WATCHER (embed, embed)
727	void start (struct ev_loop *embedded_loop)
728	{
729	stop ();
730	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
731	start ();
732	}
733
734	void sweep ()
735	{
736	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
737	}
738	EV_END_WATCHER (embed, embed)
739	#endif
740
741	#if EV_FORK_ENABLE
742	EV_BEGIN_WATCHER (fork, fork)
743	void set () { }
744	EV_END_WATCHER (fork, fork)
745	#endif
746
747	#undef EV_PX
748	#undef EV_PX_
749	#undef EV_CONSTRUCT
750	#undef EV_BEGIN_WATCHER
751	#undef EV_END_WATCHER
752
753	}
754
755	#endif
756