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:	1.43
Committed:	Wed Nov 5 14:36:18 2008 UTC (15 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-3_49
Changes since 1.42:	+2 -1 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	{
63	UNDEF = EV_UNDEF,
64	NONE = EV_NONE,
65	READ = EV_READ,
66	WRITE = EV_WRITE,
67	TIMEOUT = EV_TIMEOUT,
68	PERIODIC = EV_PERIODIC,
69	SIGNAL = EV_SIGNAL,
70	CHILD = EV_CHILD,
71	STAT = EV_STAT,
72	IDLE = EV_IDLE,
73	CHECK = EV_CHECK,
74	PREPARE = EV_PREPARE,
75	FORK = EV_FORK,
76	ASYNC = EV_ASYNC,
77	EMBED = EV_EMBED,
78	# undef ERROR // some systems stupidly #define ERROR
79	ERROR = EV_ERROR,
80	};
81
82	enum
83	{
84	AUTO = EVFLAG_AUTO,
85	NOENV = EVFLAG_NOENV,
86	FORKCHECK = EVFLAG_FORKCHECK,
87
88	SELECT = EVBACKEND_SELECT,
89	POLL = EVBACKEND_POLL,
90	EPOLL = EVBACKEND_EPOLL,
91	KQUEUE = EVBACKEND_KQUEUE,
92	DEVPOLL = EVBACKEND_DEVPOLL,
93	PORT = EVBACKEND_PORT
94	};
95
96	enum
97	{
98	NONBLOCK = EVLOOP_NONBLOCK,
99	ONESHOT = EVLOOP_ONESHOT
100	};
101
102	enum how_t
103	{
104	ONE = EVUNLOOP_ONE,
105	ALL = EVUNLOOP_ALL
106	};
107
108	struct bad_loop
109	#if EV_USE_STDEXCEPT
110	: std::runtime_error
111	#endif
112	{
113	#if EV_USE_STDEXCEPT
114	bad_loop ()
115	: std::runtime_error ("libev event loop cannot be initialized, bad value of LIBEV_FLAGS?")
116	{
117	}
118	#endif
119	};
120
121	#ifdef EV_AX
122	# undef EV_AX
123	#endif
124
125	#ifdef EV_AX_
126	# undef EV_AX_
127	#endif
128
129	#if EV_MULTIPLICITY
130	# define EV_AX raw_loop
131	# define EV_AX_ raw_loop,
132	#else
133	# define EV_AX
134	# define EV_AX_
135	#endif
136
137	struct loop_ref
138	{
139	loop_ref (EV_P) throw ()
140	#if EV_MULTIPLICITY
141	: EV_AX (EV_A)
142	#endif
143	{
144	}
145
146	bool operator == (const loop_ref &other) const throw ()
147	{
148	#if EV_MULTIPLICITY
149	return EV_AX == other.EV_AX;
150	#else
151	return true;
152	#endif
153	}
154
155	bool operator != (const loop_ref &other) const throw ()
156	{
157	#if EV_MULTIPLICITY
158	return ! (*this == other);
159	#else
160	return false;
161	#endif
162	}
163
164	#if EV_MULTIPLICITY
165	bool operator == (struct ev_loop *other) const throw ()
166	{
167	return this->EV_AX == other;
168	}
169
170	bool operator != (struct ev_loop *other) const throw ()
171	{
172	return ! (*this == other);
173	}
174
175	bool operator == (const struct ev_loop *other) const throw ()
176	{
177	return this->EV_AX == other;
178	}
179
180	bool operator != (const struct ev_loop *other) const throw ()
181	{
182	return (*this == other);
183	}
184
185	operator struct ev_loop * () const throw ()
186	{
187	return EV_AX;
188	}
189
190	operator const struct ev_loop * () const throw ()
191	{
192	return EV_AX;
193	}
194
195	bool is_default () const throw ()
196	{
197	return EV_AX == ev_default_loop (0);
198	}
199	#endif
200
201	void loop (int flags = 0)
202	{
203	ev_loop (EV_AX_ flags);
204	}
205
206	void unloop (how_t how = ONE) throw ()
207	{
208	ev_unloop (EV_AX_ how);
209	}
210
211	void post_fork () throw ()
212	{
213	#if EV_MULTIPLICITY
214	ev_loop_fork (EV_AX);
215	#else
216	ev_default_fork ();
217	#endif
218	}
219
220	unsigned int count () const throw ()
221	{
222	return ev_loop_count (EV_AX);
223	}
224
225	unsigned int backend () const throw ()
226	{
227	return ev_backend (EV_AX);
228	}
229
230	tstamp now () const throw ()
231	{
232	return ev_now (EV_AX);
233	}
234
235	void ref () throw ()
236	{
237	ev_ref (EV_AX);
238	}
239
240	void unref () throw ()
241	{
242	ev_unref (EV_AX);
243	}
244
245	void set_io_collect_interval (tstamp interval) throw ()
246	{
247	ev_set_io_collect_interval (EV_AX_ interval);
248	}
249
250	void set_timeout_collect_interval (tstamp interval) throw ()
251	{
252	ev_set_timeout_collect_interval (EV_AX_ interval);
253	}
254
255	// function callback
256	void once (int fd, int events, tstamp timeout, void (cb)(int, void ), void* arg = 0) throw ()
257	{
258	ev_once (EV_AX_ fd, events, timeout, cb, arg);
259	}
260
261	// method callback
262	template<class K, void (K::*method)(int)>
263	void once (int fd, int events, tstamp timeout, K *object) throw ()
264	{
265	once (fd, events, timeout, method_thunk<K, method>, object);
266	}
267
268	template<class K, void (K::*method)(int)>
269	static void method_thunk (int revents, void* arg)
270	{
271	K obj = static_cast<K >(arg);
272	(obj->*method) (revents);
273	}
274
275	// const method callback
276	template<class K, void (K::*method)(int) const>
277	void once (int fd, int events, tstamp timeout, const K *object) throw ()
278	{
279	once (fd, events, timeout, const_method_thunk<K, method>, object);
280	}
281
282	template<class K, void (K::*method)(int) const>
283	static void const_method_thunk (int revents, void* arg)
284	{
285	K obj = static_cast<K >(arg);
286	(obj->*method) (revents);
287	}
288
289	// simple method callback
290	template<class K, void (K::*method)()>
291	void once (int fd, int events, tstamp timeout, K *object) throw ()
292	{
293	once (fd, events, timeout, method_noargs_thunk<K, method>, object);
294	}
295
296	template<class K, void (K::*method)()>
297	static void method_noargs_thunk (int revents, void* arg)
298	{
299	K obj = static_cast<K >(arg);
300	(obj->*method) ();
301	}
302
303	// simpler function callback
304	template<void (*cb)(int)>
305	void once (int fd, int events, tstamp timeout) throw ()
306	{
307	once (fd, events, timeout, simpler_func_thunk<cb>);
308	}
309
310	template<void (*cb)(int)>
311	static void simpler_func_thunk (int revents, void* arg)
312	{
313	(*cb) (revents);
314	}
315
316	// simplest function callback
317	template<void (*cb)()>
318	void once (int fd, int events, tstamp timeout) throw ()
319	{
320	once (fd, events, timeout, simplest_func_thunk<cb>);
321	}
322
323	template<void (*cb)()>
324	static void simplest_func_thunk (int revents, void* arg)
325	{
326	(*cb) ();
327	}
328
329	void feed_fd_event (int fd, int revents) throw ()
330	{
331	ev_feed_fd_event (EV_AX_ fd, revents);
332	}
333
334	void feed_signal_event (int signum) throw ()
335	{
336	ev_feed_signal_event (EV_AX_ signum);
337	}
338
339	#if EV_MULTIPLICITY
340	struct ev_loop* EV_AX;
341	#endif
342
343	};
344
345	#if EV_MULTIPLICITY
346	struct dynamic_loop : loop_ref
347	{
348
349	dynamic_loop (unsigned int flags = AUTO) throw (bad_loop)
350	: loop_ref (ev_loop_new (flags))
351	{
352	if (!EV_AX)
353	throw bad_loop ();
354	}
355
356	~dynamic_loop () throw ()
357	{
358	ev_loop_destroy (EV_AX);
359	EV_AX = 0;
360	}
361
362	private:
363
364	dynamic_loop (const dynamic_loop &);
365
366	dynamic_loop & operator= (const dynamic_loop &);
367
368	};
369	#endif
370
371	struct default_loop : loop_ref
372	{
373	default_loop (unsigned int flags = AUTO) throw (bad_loop)
374	#if EV_MULTIPLICITY
375	: loop_ref (ev_default_loop (flags))
376	#endif
377	{
378	if (
379	#if EV_MULTIPLICITY
380	!EV_AX
381	#else
382	!ev_default_loop (flags)
383	#endif
384	)
385	throw bad_loop ();
386	}
387
388	~default_loop () throw ()
389	{
390	ev_default_destroy ();
391	}
392
393	private:
394	default_loop (const default_loop &);
395	default_loop &operator = (const default_loop &);
396	};
397
398	inline loop_ref get_default_loop () throw ()
399	{
400	#if EV_MULTIPLICITY
401	return ev_default_loop (0);
402	#else
403	return loop_ref ();
404	#endif
405	}
406
407	#undef EV_AX
408	#undef EV_AX_
409
410	#undef EV_PX
411	#undef EV_PX_
412	#if EV_MULTIPLICITY
413	# define EV_PX loop_ref EV_A
414	# define EV_PX_ loop_ref EV_A_
415	#else
416	# define EV_PX
417	# define EV_PX_
418	#endif
419
420	template<class ev_watcher, class watcher>
421	struct base : ev_watcher
422	{
423	#if EV_MULTIPLICITY
424	EV_PX;
425
426	void set (EV_PX) throw ()
427	{
428	this->EV_A = EV_A;
429	}
430	#endif
431
432	base (EV_PX) throw ()
433	#if EV_MULTIPLICITY
434	: EV_A (EV_A)
435	#endif
436	{
437	ev_init (this, 0);
438	}
439
440	void set_ (void data, void (cb)(EV_P_ ev_watcher *w, int revents)) throw ()
441	{
442	this->data = data;
443	ev_set_cb (static_cast<ev_watcher *>(this), cb);
444	}
445
446	// method callback
447	template<class K, void (K::*method)(watcher &w, int)>
448	void set (K *object) throw ()
449	{
450	set_ (object, method_thunk<K, method>);
451	}
452
453	template<class K, void (K::*method)(watcher &w, int)>
454	static void method_thunk (EV_P_ ev_watcher *w, int revents)
455	{
456	K obj = static_cast<K >(w->data);
457	(obj->method) (static_cast<watcher *>(w), revents);
458	}
459
460	// const method callback
461	template<class K, void (K::*method)(watcher &w, int) const>
462	void set (const K *object) throw ()
463	{
464	set_ (object, const_method_thunk<K, method>);
465	}
466
467	template<class K, void (K::*method)(watcher &w, int) const>
468	static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
469	{
470	K obj = static_cast<K >(w->data);
471	(static_cast<K >(w->data)->method) (static_cast<watcher >(w), revents);
472	}
473
474	// function callback
475	template<void (*function)(watcher &w, int)>
476	void set (void *data = 0) throw ()
477	{
478	set_ (data, function_thunk<function>);
479	}
480
481	template<void (*function)(watcher &w, int)>
482	static void function_thunk (EV_P_ ev_watcher *w, int revents)
483	{
484	function (static_cast<watcher >(w), revents);
485	}
486
487	// simple callback
488	template<class K, void (K::*method)()>
489	void set (K *object) throw ()
490	{
491	set_ (object, method_noargs_thunk<K, method>);
492	}
493
494	template<class K, void (K::*method)()>
495	static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
496	{
497	K obj = static_cast<K >(w->data);
498	(obj->*method) ();
499	}
500
501	void operator ()(int events = EV_UNDEF)
502	{
503	return ev_cb (static_cast<ev_watcher *>(this))
504	(static_cast<ev_watcher *>(this), events);
505	}
506
507	bool is_active () const throw ()
508	{
509	return ev_is_active (static_cast<const ev_watcher *>(this));
510	}
511
512	bool is_pending () const throw ()
513	{
514	return ev_is_pending (static_cast<const ev_watcher *>(this));
515	}
516
517	void feed_event (int revents) throw ()
518	{
519	ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
520	}
521	};
522
523	inline tstamp now () throw ()
524	{
525	return ev_time ();
526	}
527
528	inline void delay (tstamp interval) throw ()
529	{
530	ev_sleep (interval);
531	}
532
533	inline int version_major () throw ()
534	{
535	return ev_version_major ();
536	}
537
538	inline int version_minor () throw ()
539	{
540	return ev_version_minor ();
541	}
542
543	inline unsigned int supported_backends () throw ()
544	{
545	return ev_supported_backends ();
546	}
547
548	inline unsigned int recommended_backends () throw ()
549	{
550	return ev_recommended_backends ();
551	}
552
553	inline unsigned int embeddable_backends () throw ()
554	{
555	return ev_embeddable_backends ();
556	}
557
558	inline void set_allocator (void (cb)(void *ptr, long size)) throw ()
559	{
560	ev_set_allocator (cb);
561	}
562
563	inline void set_syserr_cb (void (cb)(const char msg)) throw ()
564	{
565	ev_set_syserr_cb (cb);
566	}
567
568	#if EV_MULTIPLICITY
569	#define EV_CONSTRUCT(cppstem,cstem) \
570	(EV_PX = get_default_loop ()) throw () \
571	: base<ev_ ## cstem, cppstem> (EV_A) \
572	{ \
573	}
574	#else
575	#define EV_CONSTRUCT(cppstem,cstem) \
576	() throw () \
577	{ \
578	}
579	#endif
580
581	/* using a template here would require quite a bit more lines,
582	* so a macro solution was chosen */
583	#define EV_BEGIN_WATCHER(cppstem,cstem) \
584	\
585	struct cppstem : base<ev_ ## cstem, cppstem> \
586	{ \
587	void start () throw () \
588	{ \
589	ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
590	} \
591	\
592	void stop () throw () \
593	{ \
594	ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
595	} \
596	\
597	cppstem EV_CONSTRUCT(cppstem,cstem) \
598	\
599	~cppstem () throw () \
600	{ \
601	stop (); \
602	} \
603	\
604	using base<ev_ ## cstem, cppstem>::set; \
605	\
606	private: \
607	\
608	cppstem (const cppstem &o); \
609	\
610	cppstem &operator =(const cppstem &o); \
611	\
612	public:
613
614	#define EV_END_WATCHER(cppstem,cstem) \
615	};
616
617	EV_BEGIN_WATCHER (io, io)
618	void set (int fd, int events) throw ()
619	{
620	int active = is_active ();
621	if (active) stop ();
622	ev_io_set (static_cast<ev_io *>(this), fd, events);
623	if (active) start ();
624	}
625
626	void set (int events) throw ()
627	{
628	int active = is_active ();
629	if (active) stop ();
630	ev_io_set (static_cast<ev_io *>(this), fd, events);
631	if (active) start ();
632	}
633
634	void start (int fd, int events) throw ()
635	{
636	set (fd, events);
637	start ();
638	}
639	EV_END_WATCHER (io, io)
640
641	EV_BEGIN_WATCHER (timer, timer)
642	void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
643	{
644	int active = is_active ();
645	if (active) stop ();
646	ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
647	if (active) start ();
648	}
649
650	void start (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
651	{
652	set (after, repeat);
653	start ();
654	}
655
656	void again () throw ()
657	{
658	ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
659	}
660	EV_END_WATCHER (timer, timer)
661
662	#if EV_PERIODIC_ENABLE
663	EV_BEGIN_WATCHER (periodic, periodic)
664	void set (ev_tstamp at, ev_tstamp interval = 0.) throw ()
665	{
666	int active = is_active ();
667	if (active) stop ();
668	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
669	if (active) start ();
670	}
671
672	void start (ev_tstamp at, ev_tstamp interval = 0.) throw ()
673	{
674	set (at, interval);
675	start ();
676	}
677
678	void again () throw ()
679	{
680	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
681	}
682	EV_END_WATCHER (periodic, periodic)
683	#endif
684
685	EV_BEGIN_WATCHER (sig, signal)
686	void set (int signum) throw ()
687	{
688	int active = is_active ();
689	if (active) stop ();
690	ev_signal_set (static_cast<ev_signal *>(this), signum);
691	if (active) start ();
692	}
693
694	void start (int signum) throw ()
695	{
696	set (signum);
697	start ();
698	}
699	EV_END_WATCHER (sig, signal)
700
701	EV_BEGIN_WATCHER (child, child)
702	void set (int pid, int trace = 0) throw ()
703	{
704	int active = is_active ();
705	if (active) stop ();
706	ev_child_set (static_cast<ev_child *>(this), pid, trace);
707	if (active) start ();
708	}
709
710	void start (int pid, int trace = 0) throw ()
711	{
712	set (pid, trace);
713	start ();
714	}
715	EV_END_WATCHER (child, child)
716
717	#if EV_STAT_ENABLE
718	EV_BEGIN_WATCHER (stat, stat)
719	void set (const char *path, ev_tstamp interval = 0.) throw ()
720	{
721	int active = is_active ();
722	if (active) stop ();
723	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
724	if (active) start ();
725	}
726
727	void start (const char *path, ev_tstamp interval = 0.) throw ()
728	{
729	stop ();
730	set (path, interval);
731	start ();
732	}
733
734	void update () throw ()
735	{
736	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
737	}
738	EV_END_WATCHER (stat, stat)
739	#endif
740
741	EV_BEGIN_WATCHER (idle, idle)
742	void set () throw () { }
743	EV_END_WATCHER (idle, idle)
744
745	EV_BEGIN_WATCHER (prepare, prepare)
746	void set () throw () { }
747	EV_END_WATCHER (prepare, prepare)
748
749	EV_BEGIN_WATCHER (check, check)
750	void set () throw () { }
751	EV_END_WATCHER (check, check)
752
753	#if EV_EMBED_ENABLE
754	EV_BEGIN_WATCHER (embed, embed)
755	void set (struct ev_loop *embedded_loop) throw ()
756	{
757	int active = is_active ();
758	if (active) stop ();
759	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
760	if (active) start ();
761	}
762
763	void start (struct ev_loop *embedded_loop) throw ()
764	{
765	set (embedded_loop);
766	start ();
767	}
768
769	void sweep ()
770	{
771	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
772	}
773	EV_END_WATCHER (embed, embed)
774	#endif
775
776	#if EV_FORK_ENABLE
777	EV_BEGIN_WATCHER (fork, fork)
778	void set () throw () { }
779	EV_END_WATCHER (fork, fork)
780	#endif
781
782	#if EV_ASYNC_ENABLE
783	EV_BEGIN_WATCHER (async, async)
784	void set () throw () { }
785
786	void send () throw ()
787	{
788	ev_async_send (EV_A_ static_cast<ev_async *>(this));
789	}
790
791	bool async_pending () throw ()
792	{
793	return ev_async_pending (static_cast<ev_async *>(this));
794	}
795	EV_END_WATCHER (async, async)
796	#endif
797
798	#undef EV_PX
799	#undef EV_PX_
800	#undef EV_CONSTRUCT
801	#undef EV_BEGIN_WATCHER
802	#undef EV_END_WATCHER
803	}
804
805	#endif
806