libev/ev%2B%2B.h

/*
 * libev simple C++ wrapper classes
 *
 * Copyright (c) 2007,2008 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

#ifndef EV_USE_STDEXCEPT
# define EV_USE_STDEXCEPT 1
#endif

#if EV_USE_STDEXCEPT
# include <stdexcept>
#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,
    ASYNC    = EV_ASYNC,
    EMBED    = EV_EMBED,
#   undef ERROR // some systems stupidly #define ERROR
    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
  };

  struct bad_loop
#if EV_USE_STDEXCEPT
  : std::runtime_error
#endif
  {
#if EV_USE_STDEXCEPT
    bad_loop ()
    : std::runtime_error ("libev event loop cannot be initialized, bad value of LIBEV_FLAGS?")
    {
    }
#endif
  };

#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) throw ()
#if EV_MULTIPLICITY
    : EV_AX (EV_A)
#endif
    {
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    void ref () throw ()
    {
      ev_ref (EV_AX);
    }

    void unref () throw ()
    {
      ev_unref (EV_AX);
    }

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

    void set_timeout_collect_interval (tstamp interval) throw ()
    {
      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) throw ()
    {
      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) throw ()
    {
      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) throw ()
    {
      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) throw ()
    {
      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) throw ()
    {
      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) throw ()
    {
      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) throw ()
    {
      ev_feed_fd_event (EV_AX_ fd, revents);
    }

    void feed_signal_event (int signum) throw ()
    {
      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) throw (bad_loop)
    : loop_ref (ev_loop_new (flags))
    {
      if (!EV_AX)
        throw bad_loop ();
    }

    ~dynamic_loop () throw ()
    {
      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) throw (bad_loop)
#if EV_MULTIPLICITY
    : loop_ref (ev_default_loop (flags))
#endif
    {
      if (
#if EV_MULTIPLICITY
          !EV_AX
#else
          !ev_default_loop (flags)
#endif
      )
        throw bad_loop ();
    }

    ~default_loop () throw ()
    {
      ev_default_destroy ();
    }

  private:
    default_loop (const default_loop &);
    default_loop &operator = (const default_loop &);
  };

  inline loop_ref get_default_loop () throw ()
  {
#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) throw ()
      {
        this->EV_A = EV_A;
      }
    #endif

    base (EV_PX) throw ()
    #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)) throw ()
    {
      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) throw ()
    {
      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) throw ()
    {
      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) throw ()
    {
      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) throw ()
    {
      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 throw ()
    {
      return ev_is_active (static_cast<const ev_watcher *>(this));
    }

    bool is_pending () const throw ()
    {
      return ev_is_pending (static_cast<const ev_watcher *>(this));
    }

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

  inline tstamp now () throw ()
  {
    return ev_time ();
  }

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

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

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

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

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

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

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

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

  #if EV_MULTIPLICITY
    #define EV_CONSTRUCT(cppstem,cstem)                                                 \
      (EV_PX = get_default_loop ()) throw ()                                            \
        : base<ev_ ## cstem, cppstem> (EV_A)                                            \
      {                                                                                 \
      }
  #else
    #define EV_CONSTRUCT(cppstem,cstem)                                                 \
      () throw ()                                                                       \
      {                                                                                 \
      }
  #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 () throw ()                                                              \
    {                                                                                   \
      ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this));                 \
    }                                                                                   \
                                                                                        \
    void stop () throw ()                                                               \
    {                                                                                   \
      ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this));                  \
    }                                                                                   \
                                                                                        \
    cppstem EV_CONSTRUCT(cppstem,cstem)                                                 \
                                                                                        \
    ~cppstem () throw ()                                                                \
    {                                                                                   \
      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) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_io_set (static_cast<ev_io *>(this), fd, events);
      if (active) start ();
    }

    void set (int events) throw ()
    {
      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) throw ()
    {
      set (fd, events);
      start ();
    }
  EV_END_WATCHER (io, io)

  EV_BEGIN_WATCHER (timer, timer)
    void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
    {
      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.) throw ()
    {
      set (after, repeat);
      start ();
    }

    void again () throw ()
    {
      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.) throw ()
    {
      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.) throw ()
    {
      set (at, interval);
      start ();
    }

    void again () throw ()
    {
      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) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_signal_set (static_cast<ev_signal *>(this), signum);
      if (active) start ();
    }

    void start (int signum) throw ()
    {
      set (signum);
      start ();
    }
  EV_END_WATCHER (sig, signal)

  EV_BEGIN_WATCHER (child, child)
    void set (int pid, int trace = 0) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_child_set (static_cast<ev_child *>(this), pid, trace);
      if (active) start ();
    }

    void start (int pid, int trace = 0) throw ()
    {
      set (pid, trace);
      start ();
    }
  EV_END_WATCHER (child, child)

  #if EV_STAT_ENABLE
  EV_BEGIN_WATCHER (stat, stat)
    void set (const char *path, ev_tstamp interval = 0.) throw ()
    {
      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.) throw ()
    {
      stop ();
      set (path, interval);
      start ();
    }

    void update () throw ()
    {
      ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
    }
  EV_END_WATCHER (stat, stat)
  #endif

  EV_BEGIN_WATCHER (idle, idle)
    void set () throw () { }
  EV_END_WATCHER (idle, idle)

  EV_BEGIN_WATCHER (prepare, prepare)
    void set () throw () { }
  EV_END_WATCHER (prepare, prepare)

  EV_BEGIN_WATCHER (check, check)
    void set () throw () { }
  EV_END_WATCHER (check, check)

  #if EV_EMBED_ENABLE
  EV_BEGIN_WATCHER (embed, embed)
    void set (struct ev_loop *embedded_loop) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
      if (active) start ();
    }

    void start (struct ev_loop *embedded_loop) throw ()
    {
      set (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 () throw () { }
  EV_END_WATCHER (fork, fork)
  #endif

  #if EV_ASYNC_ENABLE
  EV_BEGIN_WATCHER (async, async)
    void set () throw () { }

    void send () throw ()
    {
      ev_async_send (EV_A_ static_cast<ev_async *>(this));
    }

    bool async_pending () throw ()
    {
      return ev_async_pending (static_cast<ev_async *>(this));
    }
  EV_END_WATCHER (async, async)
  #endif

  #undef EV_PX
  #undef EV_PX_
  #undef EV_CONSTRUCT
  #undef EV_BEGIN_WATCHER
  #undef EV_END_WATCHER
}

#endif

Revision:	1.42
Committed:	Mon Nov 3 14:27:06 2008 UTC (15 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.41:	+1 -0 lines
Log Message:	* empty log message *
#	Content
1	/*
2	* libev simple C++ wrapper classes
3	*
4	* Copyright (c) 2007,2008 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	#ifndef EV_USE_STDEXCEPT
50	# define EV_USE_STDEXCEPT 1
51	#endif
52
53	#if EV_USE_STDEXCEPT
54	# include <stdexcept>
55	#endif
56
57	namespace ev {
58
59	typedef ev_tstamp tstamp;
60
61	enum {
62	UNDEF = EV_UNDEF,
63	NONE = EV_NONE,
64	READ = EV_READ,
65	WRITE = EV_WRITE,
66	TIMEOUT = EV_TIMEOUT,
67	PERIODIC = EV_PERIODIC,
68	SIGNAL = EV_SIGNAL,
69	CHILD = EV_CHILD,
70	STAT = EV_STAT,
71	IDLE = EV_IDLE,
72	CHECK = EV_CHECK,
73	PREPARE = EV_PREPARE,
74	FORK = EV_FORK,
75	ASYNC = EV_ASYNC,
76	EMBED = EV_EMBED,
77	# undef ERROR // some systems stupidly #define ERROR
78	ERROR = EV_ERROR,
79	};
80
81	enum
82	{
83	AUTO = EVFLAG_AUTO,
84	NOENV = EVFLAG_NOENV,
85	FORKCHECK = EVFLAG_FORKCHECK,
86
87	SELECT = EVBACKEND_SELECT,
88	POLL = EVBACKEND_POLL,
89	EPOLL = EVBACKEND_EPOLL,
90	KQUEUE = EVBACKEND_KQUEUE,
91	DEVPOLL = EVBACKEND_DEVPOLL,
92	PORT = EVBACKEND_PORT
93	};
94
95	enum
96	{
97	NONBLOCK = EVLOOP_NONBLOCK,
98	ONESHOT = EVLOOP_ONESHOT
99	};
100
101	enum how_t
102	{
103	ONE = EVUNLOOP_ONE,
104	ALL = EVUNLOOP_ALL
105	};
106
107	struct bad_loop
108	#if EV_USE_STDEXCEPT
109	: std::runtime_error
110	#endif
111	{
112	#if EV_USE_STDEXCEPT
113	bad_loop ()
114	: std::runtime_error ("libev event loop cannot be initialized, bad value of LIBEV_FLAGS?")
115	{
116	}
117	#endif
118	};
119
120	#ifdef EV_AX
121	# undef EV_AX
122	#endif
123
124	#ifdef EV_AX_
125	# undef EV_AX_
126	#endif
127
128	#if EV_MULTIPLICITY
129	# define EV_AX raw_loop
130	# define EV_AX_ raw_loop,
131	#else
132	# define EV_AX
133	# define EV_AX_
134	#endif
135
136	struct loop_ref
137	{
138	loop_ref (EV_P) throw ()
139	#if EV_MULTIPLICITY
140	: EV_AX (EV_A)
141	#endif
142	{
143	}
144
145	bool operator == (const loop_ref &other) const throw ()
146	{
147	#if EV_MULTIPLICITY
148	return EV_AX == other.EV_AX;
149	#else
150	return true;
151	#endif
152	}
153
154	bool operator != (const loop_ref &other) const throw ()
155	{
156	#if EV_MULTIPLICITY
157	return ! (*this == other);
158	#else
159	return false;
160	#endif
161	}
162
163	#if EV_MULTIPLICITY
164	bool operator == (struct ev_loop *other) const throw ()
165	{
166	return this->EV_AX == other;
167	}
168
169	bool operator != (struct ev_loop *other) const throw ()
170	{
171	return ! (*this == other);
172	}
173
174	bool operator == (const struct ev_loop *other) const throw ()
175	{
176	return this->EV_AX == other;
177	}
178
179	bool operator != (const struct ev_loop *other) const throw ()
180	{
181	return (*this == other);
182	}
183
184	operator struct ev_loop * () const throw ()
185	{
186	return EV_AX;
187	}
188
189	operator const struct ev_loop * () const throw ()
190	{
191	return EV_AX;
192	}
193
194	bool is_default () const throw ()
195	{
196	return EV_AX == ev_default_loop (0);
197	}
198	#endif
199
200	void loop (int flags = 0)
201	{
202	ev_loop (EV_AX_ flags);
203	}
204
205	void unloop (how_t how = ONE) throw ()
206	{
207	ev_unloop (EV_AX_ how);
208	}
209
210	void post_fork () throw ()
211	{
212	#if EV_MULTIPLICITY
213	ev_loop_fork (EV_AX);
214	#else
215	ev_default_fork ();
216	#endif
217	}
218
219	unsigned int count () const throw ()
220	{
221	return ev_loop_count (EV_AX);
222	}
223
224	unsigned int backend () const throw ()
225	{
226	return ev_backend (EV_AX);
227	}
228
229	tstamp now () const throw ()
230	{
231	return ev_now (EV_AX);
232	}
233
234	void ref () throw ()
235	{
236	ev_ref (EV_AX);
237	}
238
239	void unref () throw ()
240	{
241	ev_unref (EV_AX);
242	}
243
244	void set_io_collect_interval (tstamp interval) throw ()
245	{
246	ev_set_io_collect_interval (EV_AX_ interval);
247	}
248
249	void set_timeout_collect_interval (tstamp interval) throw ()
250	{
251	ev_set_timeout_collect_interval (EV_AX_ interval);
252	}
253
254	// function callback
255	void once (int fd, int events, tstamp timeout, void (cb)(int, void ), void* arg = 0) throw ()
256	{
257	ev_once (EV_AX_ fd, events, timeout, cb, arg);
258	}
259
260	// method callback
261	template<class K, void (K::*method)(int)>
262	void once (int fd, int events, tstamp timeout, K *object) throw ()
263	{
264	once (fd, events, timeout, method_thunk<K, method>, object);
265	}
266
267	template<class K, void (K::*method)(int)>
268	static void method_thunk (int revents, void* arg)
269	{
270	K obj = static_cast<K >(arg);
271	(obj->*method) (revents);
272	}
273
274	// const method callback
275	template<class K, void (K::*method)(int) const>
276	void once (int fd, int events, tstamp timeout, const K *object) throw ()
277	{
278	once (fd, events, timeout, const_method_thunk<K, method>, object);
279	}
280
281	template<class K, void (K::*method)(int) const>
282	static void const_method_thunk (int revents, void* arg)
283	{
284	K obj = static_cast<K >(arg);
285	(obj->*method) (revents);
286	}
287
288	// simple method callback
289	template<class K, void (K::*method)()>
290	void once (int fd, int events, tstamp timeout, K *object) throw ()
291	{
292	once (fd, events, timeout, method_noargs_thunk<K, method>, object);
293	}
294
295	template<class K, void (K::*method)()>
296	static void method_noargs_thunk (int revents, void* arg)
297	{
298	K obj = static_cast<K >(arg);
299	(obj->*method) ();
300	}
301
302	// simpler function callback
303	template<void (*cb)(int)>
304	void once (int fd, int events, tstamp timeout) throw ()
305	{
306	once (fd, events, timeout, simpler_func_thunk<cb>);
307	}
308
309	template<void (*cb)(int)>
310	static void simpler_func_thunk (int revents, void* arg)
311	{
312	(*cb) (revents);
313	}
314
315	// simplest function callback
316	template<void (*cb)()>
317	void once (int fd, int events, tstamp timeout) throw ()
318	{
319	once (fd, events, timeout, simplest_func_thunk<cb>);
320	}
321
322	template<void (*cb)()>
323	static void simplest_func_thunk (int revents, void* arg)
324	{
325	(*cb) ();
326	}
327
328	void feed_fd_event (int fd, int revents) throw ()
329	{
330	ev_feed_fd_event (EV_AX_ fd, revents);
331	}
332
333	void feed_signal_event (int signum) throw ()
334	{
335	ev_feed_signal_event (EV_AX_ signum);
336	}
337
338	#if EV_MULTIPLICITY
339	struct ev_loop* EV_AX;
340	#endif
341
342	};
343
344	#if EV_MULTIPLICITY
345	struct dynamic_loop : loop_ref
346	{
347
348	dynamic_loop (unsigned int flags = AUTO) throw (bad_loop)
349	: loop_ref (ev_loop_new (flags))
350	{
351	if (!EV_AX)
352	throw bad_loop ();
353	}
354
355	~dynamic_loop () throw ()
356	{
357	ev_loop_destroy (EV_AX);
358	EV_AX = 0;
359	}
360
361	private:
362
363	dynamic_loop (const dynamic_loop &);
364
365	dynamic_loop & operator= (const dynamic_loop &);
366
367	};
368	#endif
369
370	struct default_loop : loop_ref
371	{
372	default_loop (unsigned int flags = AUTO) throw (bad_loop)
373	#if EV_MULTIPLICITY
374	: loop_ref (ev_default_loop (flags))
375	#endif
376	{
377	if (
378	#if EV_MULTIPLICITY
379	!EV_AX
380	#else
381	!ev_default_loop (flags)
382	#endif
383	)
384	throw bad_loop ();
385	}
386
387	~default_loop () throw ()
388	{
389	ev_default_destroy ();
390	}
391
392	private:
393	default_loop (const default_loop &);
394	default_loop &operator = (const default_loop &);
395	};
396
397	inline loop_ref get_default_loop () throw ()
398	{
399	#if EV_MULTIPLICITY
400	return ev_default_loop (0);
401	#else
402	return loop_ref ();
403	#endif
404	}
405
406	#undef EV_AX
407	#undef EV_AX_
408
409	#undef EV_PX
410	#undef EV_PX_
411	#if EV_MULTIPLICITY
412	# define EV_PX loop_ref EV_A
413	# define EV_PX_ loop_ref EV_A_
414	#else
415	# define EV_PX
416	# define EV_PX_
417	#endif
418
419	template<class ev_watcher, class watcher>
420	struct base : ev_watcher
421	{
422	#if EV_MULTIPLICITY
423	EV_PX;
424
425	void set (EV_PX) throw ()
426	{
427	this->EV_A = EV_A;
428	}
429	#endif
430
431	base (EV_PX) throw ()
432	#if EV_MULTIPLICITY
433	: EV_A (EV_A)
434	#endif
435	{
436	ev_init (this, 0);
437	}
438
439	void set_ (void data, void (cb)(EV_P_ ev_watcher *w, int revents)) throw ()
440	{
441	this->data = data;
442	ev_set_cb (static_cast<ev_watcher *>(this), cb);
443	}
444
445	// method callback
446	template<class K, void (K::*method)(watcher &w, int)>
447	void set (K *object) throw ()
448	{
449	set_ (object, method_thunk<K, method>);
450	}
451
452	template<class K, void (K::*method)(watcher &w, int)>
453	static void method_thunk (EV_P_ ev_watcher *w, int revents)
454	{
455	K obj = static_cast<K >(w->data);
456	(obj->method) (static_cast<watcher *>(w), revents);
457	}
458
459	// const method callback
460	template<class K, void (K::*method)(watcher &w, int) const>
461	void set (const K *object) throw ()
462	{
463	set_ (object, const_method_thunk<K, method>);
464	}
465
466	template<class K, void (K::*method)(watcher &w, int) const>
467	static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
468	{
469	K obj = static_cast<K >(w->data);
470	(static_cast<K >(w->data)->method) (static_cast<watcher >(w), revents);
471	}
472
473	// function callback
474	template<void (*function)(watcher &w, int)>
475	void set (void *data = 0) throw ()
476	{
477	set_ (data, function_thunk<function>);
478	}
479
480	template<void (*function)(watcher &w, int)>
481	static void function_thunk (EV_P_ ev_watcher *w, int revents)
482	{
483	function (static_cast<watcher >(w), revents);
484	}
485
486	// simple callback
487	template<class K, void (K::*method)()>
488	void set (K *object) throw ()
489	{
490	set_ (object, method_noargs_thunk<K, method>);
491	}
492
493	template<class K, void (K::*method)()>
494	static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
495	{
496	K obj = static_cast<K >(w->data);
497	(obj->*method) ();
498	}
499
500	void operator ()(int events = EV_UNDEF)
501	{
502	return ev_cb (static_cast<ev_watcher *>(this))
503	(static_cast<ev_watcher *>(this), events);
504	}
505
506	bool is_active () const throw ()
507	{
508	return ev_is_active (static_cast<const ev_watcher *>(this));
509	}
510
511	bool is_pending () const throw ()
512	{
513	return ev_is_pending (static_cast<const ev_watcher *>(this));
514	}
515
516	void feed_event (int revents) throw ()
517	{
518	ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
519	}
520	};
521
522	inline tstamp now () throw ()
523	{
524	return ev_time ();
525	}
526
527	inline void delay (tstamp interval) throw ()
528	{
529	ev_sleep (interval);
530	}
531
532	inline int version_major () throw ()
533	{
534	return ev_version_major ();
535	}
536
537	inline int version_minor () throw ()
538	{
539	return ev_version_minor ();
540	}
541
542	inline unsigned int supported_backends () throw ()
543	{
544	return ev_supported_backends ();
545	}
546
547	inline unsigned int recommended_backends () throw ()
548	{
549	return ev_recommended_backends ();
550	}
551
552	inline unsigned int embeddable_backends () throw ()
553	{
554	return ev_embeddable_backends ();
555	}
556
557	inline void set_allocator (void (cb)(void *ptr, long size)) throw ()
558	{
559	ev_set_allocator (cb);
560	}
561
562	inline void set_syserr_cb (void (cb)(const char msg)) throw ()
563	{
564	ev_set_syserr_cb (cb);
565	}
566
567	#if EV_MULTIPLICITY
568	#define EV_CONSTRUCT(cppstem,cstem) \
569	(EV_PX = get_default_loop ()) throw () \
570	: base<ev_ ## cstem, cppstem> (EV_A) \
571	{ \
572	}
573	#else
574	#define EV_CONSTRUCT(cppstem,cstem) \
575	() throw () \
576	{ \
577	}
578	#endif
579
580	/* using a template here would require quite a bit more lines,
581	* so a macro solution was chosen */
582	#define EV_BEGIN_WATCHER(cppstem,cstem) \
583	\
584	struct cppstem : base<ev_ ## cstem, cppstem> \
585	{ \
586	void start () throw () \
587	{ \
588	ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
589	} \
590	\
591	void stop () throw () \
592	{ \
593	ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
594	} \
595	\
596	cppstem EV_CONSTRUCT(cppstem,cstem) \
597	\
598	~cppstem () throw () \
599	{ \
600	stop (); \
601	} \
602	\
603	using base<ev_ ## cstem, cppstem>::set; \
604	\
605	private: \
606	\
607	cppstem (const cppstem &o); \
608	\
609	cppstem &operator =(const cppstem &o); \
610	\
611	public:
612
613	#define EV_END_WATCHER(cppstem,cstem) \
614	};
615
616	EV_BEGIN_WATCHER (io, io)
617	void set (int fd, int events) throw ()
618	{
619	int active = is_active ();
620	if (active) stop ();
621	ev_io_set (static_cast<ev_io *>(this), fd, events);
622	if (active) start ();
623	}
624
625	void set (int events) throw ()
626	{
627	int active = is_active ();
628	if (active) stop ();
629	ev_io_set (static_cast<ev_io *>(this), fd, events);
630	if (active) start ();
631	}
632
633	void start (int fd, int events) throw ()
634	{
635	set (fd, events);
636	start ();
637	}
638	EV_END_WATCHER (io, io)
639
640	EV_BEGIN_WATCHER (timer, timer)
641	void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
642	{
643	int active = is_active ();
644	if (active) stop ();
645	ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
646	if (active) start ();
647	}
648
649	void start (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
650	{
651	set (after, repeat);
652	start ();
653	}
654
655	void again () throw ()
656	{
657	ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
658	}
659	EV_END_WATCHER (timer, timer)
660
661	#if EV_PERIODIC_ENABLE
662	EV_BEGIN_WATCHER (periodic, periodic)
663	void set (ev_tstamp at, ev_tstamp interval = 0.) throw ()
664	{
665	int active = is_active ();
666	if (active) stop ();
667	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
668	if (active) start ();
669	}
670
671	void start (ev_tstamp at, ev_tstamp interval = 0.) throw ()
672	{
673	set (at, interval);
674	start ();
675	}
676
677	void again () throw ()
678	{
679	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
680	}
681	EV_END_WATCHER (periodic, periodic)
682	#endif
683
684	EV_BEGIN_WATCHER (sig, signal)
685	void set (int signum) throw ()
686	{
687	int active = is_active ();
688	if (active) stop ();
689	ev_signal_set (static_cast<ev_signal *>(this), signum);
690	if (active) start ();
691	}
692
693	void start (int signum) throw ()
694	{
695	set (signum);
696	start ();
697	}
698	EV_END_WATCHER (sig, signal)
699
700	EV_BEGIN_WATCHER (child, child)
701	void set (int pid, int trace = 0) throw ()
702	{
703	int active = is_active ();
704	if (active) stop ();
705	ev_child_set (static_cast<ev_child *>(this), pid, trace);
706	if (active) start ();
707	}
708
709	void start (int pid, int trace = 0) throw ()
710	{
711	set (pid, trace);
712	start ();
713	}
714	EV_END_WATCHER (child, child)
715
716	#if EV_STAT_ENABLE
717	EV_BEGIN_WATCHER (stat, stat)
718	void set (const char *path, ev_tstamp interval = 0.) throw ()
719	{
720	int active = is_active ();
721	if (active) stop ();
722	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
723	if (active) start ();
724	}
725
726	void start (const char *path, ev_tstamp interval = 0.) throw ()
727	{
728	stop ();
729	set (path, interval);
730	start ();
731	}
732
733	void update () throw ()
734	{
735	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
736	}
737	EV_END_WATCHER (stat, stat)
738	#endif
739
740	EV_BEGIN_WATCHER (idle, idle)
741	void set () throw () { }
742	EV_END_WATCHER (idle, idle)
743
744	EV_BEGIN_WATCHER (prepare, prepare)
745	void set () throw () { }
746	EV_END_WATCHER (prepare, prepare)
747
748	EV_BEGIN_WATCHER (check, check)
749	void set () throw () { }
750	EV_END_WATCHER (check, check)
751
752	#if EV_EMBED_ENABLE
753	EV_BEGIN_WATCHER (embed, embed)
754	void set (struct ev_loop *embedded_loop) throw ()
755	{
756	int active = is_active ();
757	if (active) stop ();
758	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
759	if (active) start ();
760	}
761
762	void start (struct ev_loop *embedded_loop) throw ()
763	{
764	set (embedded_loop);
765	start ();
766	}
767
768	void sweep ()
769	{
770	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
771	}
772	EV_END_WATCHER (embed, embed)
773	#endif
774
775	#if EV_FORK_ENABLE
776	EV_BEGIN_WATCHER (fork, fork)
777	void set () throw () { }
778	EV_END_WATCHER (fork, fork)
779	#endif
780
781	#if EV_ASYNC_ENABLE
782	EV_BEGIN_WATCHER (async, async)
783	void set () throw () { }
784
785	void send () throw ()
786	{
787	ev_async_send (EV_A_ static_cast<ev_async *>(this));
788	}
789
790	bool async_pending () throw ()
791	{
792	return ev_async_pending (static_cast<ev_async *>(this));
793	}
794	EV_END_WATCHER (async, async)
795	#endif
796
797	#undef EV_PX
798	#undef EV_PX_
799	#undef EV_CONSTRUCT
800	#undef EV_BEGIN_WATCHER
801	#undef EV_END_WATCHER
802	}
803
804	#endif
805