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

#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,
    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:	1.39
Committed:	Tue Apr 15 04:34:07 2008 UTC (16 years, 1 month ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-3_31, rel-3_3
Changes since 1.38:	+32 -8 lines
Log Message:	* empty log message *
#	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	#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	ERROR = EV_ERROR,
78	};
79
80	enum
81	{
82	AUTO = EVFLAG_AUTO,
83	NOENV = EVFLAG_NOENV,
84	FORKCHECK = EVFLAG_FORKCHECK,
85	SELECT = EVBACKEND_SELECT,
86	POLL = EVBACKEND_POLL,
87	EPOLL = EVBACKEND_EPOLL,
88	KQUEUE = EVBACKEND_KQUEUE,
89	DEVPOLL = EVBACKEND_DEVPOLL,
90	PORT = EVBACKEND_PORT
91	};
92
93	enum
94	{
95	NONBLOCK = EVLOOP_NONBLOCK,
96	ONESHOT = EVLOOP_ONESHOT
97	};
98
99	enum how_t
100	{
101	ONE = EVUNLOOP_ONE,
102	ALL = EVUNLOOP_ALL
103	};
104
105	struct bad_loop
106	#if EV_USE_STDEXCEPT
107	: std::runtime_error
108	#endif
109	{
110	#if EV_USE_STDEXCEPT
111	bad_loop ()
112	: std::runtime_error ("libev event loop cannot be initialized, bad value of LIBEV_FLAGS?")
113	{
114	}
115	#endif
116	};
117
118	#ifdef EV_AX
119	# undef EV_AX
120	#endif
121
122	#ifdef EV_AX_
123	# undef EV_AX_
124	#endif
125
126	#if EV_MULTIPLICITY
127	# define EV_AX raw_loop
128	# define EV_AX_ raw_loop,
129	#else
130	# define EV_AX
131	# define EV_AX_
132	#endif
133
134	struct loop_ref
135	{
136	loop_ref (EV_P) throw ()
137	#if EV_MULTIPLICITY
138	: EV_AX (EV_A)
139	#endif
140	{
141	}
142
143	bool operator == (const loop_ref &other) const throw ()
144	{
145	#if EV_MULTIPLICITY
146	return EV_AX == other.EV_AX;
147	#else
148	return true;
149	#endif
150	}
151
152	bool operator != (const loop_ref &other) const throw ()
153	{
154	#if EV_MULTIPLICITY
155	return ! (*this == other);
156	#else
157	return false;
158	#endif
159	}
160
161	#if EV_MULTIPLICITY
162	bool operator == (struct ev_loop *other) const throw ()
163	{
164	return this->EV_AX == other;
165	}
166
167	bool operator != (struct ev_loop *other) const throw ()
168	{
169	return ! (*this == other);
170	}
171
172	bool operator == (const struct ev_loop *other) const throw ()
173	{
174	return this->EV_AX == other;
175	}
176
177	bool operator != (const struct ev_loop *other) const throw ()
178	{
179	return (*this == other);
180	}
181
182	operator struct ev_loop * () const throw ()
183	{
184	return EV_AX;
185	}
186
187	operator const struct ev_loop * () const throw ()
188	{
189	return EV_AX;
190	}
191
192	bool is_default () const throw ()
193	{
194	return EV_AX == ev_default_loop (0);
195	}
196	#endif
197
198	void loop (int flags = 0)
199	{
200	ev_loop (EV_AX_ flags);
201	}
202
203	void unloop (how_t how = ONE) throw ()
204	{
205	ev_unloop (EV_AX_ how);
206	}
207
208	void post_fork () throw ()
209	{
210	#if EV_MULTIPLICITY
211	ev_loop_fork (EV_AX);
212	#else
213	ev_default_fork ();
214	#endif
215	}
216
217	unsigned int count () const throw ()
218	{
219	return ev_loop_count (EV_AX);
220	}
221
222	unsigned int backend () const throw ()
223	{
224	return ev_backend (EV_AX);
225	}
226
227	tstamp now () const throw ()
228	{
229	return ev_now (EV_AX);
230	}
231
232	void ref () throw ()
233	{
234	ev_ref (EV_AX);
235	}
236
237	void unref () throw ()
238	{
239	ev_unref (EV_AX);
240	}
241
242	void set_io_collect_interval (tstamp interval) throw ()
243	{
244	ev_set_io_collect_interval (EV_AX_ interval);
245	}
246
247	void set_timeout_collect_interval (tstamp interval) throw ()
248	{
249	ev_set_timeout_collect_interval (EV_AX_ interval);
250	}
251
252	// function callback
253	void once (int fd, int events, tstamp timeout, void (cb)(int, void ), void* arg = 0) throw ()
254	{
255	ev_once (EV_AX_ fd, events, timeout, cb, arg);
256	}
257
258	// method callback
259	template<class K, void (K::*method)(int)>
260	void once (int fd, int events, tstamp timeout, K *object) throw ()
261	{
262	once (fd, events, timeout, method_thunk<K, method>, object);
263	}
264
265	template<class K, void (K::*method)(int)>
266	static void method_thunk (int revents, void* arg)
267	{
268	K obj = static_cast<K >(arg);
269	(obj->*method) (revents);
270	}
271
272	// const method callback
273	template<class K, void (K::*method)(int) const>
274	void once (int fd, int events, tstamp timeout, const K *object) throw ()
275	{
276	once (fd, events, timeout, const_method_thunk<K, method>, object);
277	}
278
279	template<class K, void (K::*method)(int) const>
280	static void const_method_thunk (int revents, void* arg)
281	{
282	K obj = static_cast<K >(arg);
283	(obj->*method) (revents);
284	}
285
286	// simple method callback
287	template<class K, void (K::*method)()>
288	void once (int fd, int events, tstamp timeout, K *object) throw ()
289	{
290	once (fd, events, timeout, method_noargs_thunk<K, method>, object);
291	}
292
293	template<class K, void (K::*method)()>
294	static void method_noargs_thunk (int revents, void* arg)
295	{
296	K obj = static_cast<K >(arg);
297	(obj->*method) ();
298	}
299
300	// simpler function callback
301	template<void (*cb)(int)>
302	void once (int fd, int events, tstamp timeout) throw ()
303	{
304	once (fd, events, timeout, simpler_func_thunk<cb>);
305	}
306
307	template<void (*cb)(int)>
308	static void simpler_func_thunk (int revents, void* arg)
309	{
310	(*cb) (revents);
311	}
312
313	// simplest function callback
314	template<void (*cb)()>
315	void once (int fd, int events, tstamp timeout) throw ()
316	{
317	once (fd, events, timeout, simplest_func_thunk<cb>);
318	}
319
320	template<void (*cb)()>
321	static void simplest_func_thunk (int revents, void* arg)
322	{
323	(*cb) ();
324	}
325
326	void feed_fd_event (int fd, int revents) throw ()
327	{
328	ev_feed_fd_event (EV_AX_ fd, revents);
329	}
330
331	void feed_signal_event (int signum) throw ()
332	{
333	ev_feed_signal_event (EV_AX_ signum);
334	}
335
336	#if EV_MULTIPLICITY
337	struct ev_loop* EV_AX;
338	#endif
339
340	};
341
342	#if EV_MULTIPLICITY
343	struct dynamic_loop : loop_ref
344	{
345
346	dynamic_loop (unsigned int flags = AUTO) throw (bad_loop)
347	: loop_ref (ev_loop_new (flags))
348	{
349	if (!EV_AX)
350	throw bad_loop ();
351	}
352
353	~dynamic_loop () throw ()
354	{
355	ev_loop_destroy (EV_AX);
356	EV_AX = 0;
357	}
358
359	private:
360
361	dynamic_loop (const dynamic_loop &);
362
363	dynamic_loop & operator= (const dynamic_loop &);
364
365	};
366	#endif
367
368	struct default_loop : loop_ref
369	{
370	default_loop (unsigned int flags = AUTO) throw (bad_loop)
371	#if EV_MULTIPLICITY
372	: loop_ref (ev_default_loop (flags))
373	#endif
374	{
375	if (
376	#if EV_MULTIPLICITY
377	!EV_AX
378	#else
379	!ev_default_loop (flags)
380	#endif
381	)
382	throw bad_loop ();
383	}
384
385	~default_loop () throw ()
386	{
387	ev_default_destroy ();
388	}
389
390	private:
391	default_loop (const default_loop &);
392	default_loop &operator = (const default_loop &);
393	};
394
395	inline loop_ref get_default_loop () throw ()
396	{
397	#if EV_MULTIPLICITY
398	return ev_default_loop (0);
399	#else
400	return loop_ref ();
401	#endif
402	}
403
404	#undef EV_AX
405	#undef EV_AX_
406
407	#undef EV_PX
408	#undef EV_PX_
409	#if EV_MULTIPLICITY
410	# define EV_PX loop_ref EV_A
411	# define EV_PX_ loop_ref EV_A_
412	#else
413	# define EV_PX
414	# define EV_PX_
415	#endif
416
417	template<class ev_watcher, class watcher>
418	struct base : ev_watcher
419	{
420	#if EV_MULTIPLICITY
421	EV_PX;
422
423	void set (EV_PX) throw ()
424	{
425	this->EV_A = EV_A;
426	}
427	#endif
428
429	base (EV_PX) throw ()
430	#if EV_MULTIPLICITY
431	: EV_A (EV_A)
432	#endif
433	{
434	ev_init (this, 0);
435	}
436
437	void set_ (void data, void (cb)(EV_P_ ev_watcher *w, int revents)) throw ()
438	{
439	this->data = data;
440	ev_set_cb (static_cast<ev_watcher *>(this), cb);
441	}
442
443	// method callback
444	template<class K, void (K::*method)(watcher &w, int)>
445	void set (K *object) throw ()
446	{
447	set_ (object, method_thunk<K, method>);
448	}
449
450	template<class K, void (K::*method)(watcher &w, int)>
451	static void method_thunk (EV_P_ ev_watcher *w, int revents)
452	{
453	K obj = static_cast<K >(w->data);
454	(obj->method) (static_cast<watcher *>(w), revents);
455	}
456
457	// const method callback
458	template<class K, void (K::*method)(watcher &w, int) const>
459	void set (const K *object) throw ()
460	{
461	set_ (object, const_method_thunk<K, method>);
462	}
463
464	template<class K, void (K::*method)(watcher &w, int) const>
465	static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
466	{
467	K obj = static_cast<K >(w->data);
468	(static_cast<K >(w->data)->method) (static_cast<watcher >(w), revents);
469	}
470
471	// function callback
472	template<void (*function)(watcher &w, int)>
473	void set (void *data = 0) throw ()
474	{
475	set_ (data, function_thunk<function>);
476	}
477
478	template<void (*function)(watcher &w, int)>
479	static void function_thunk (EV_P_ ev_watcher *w, int revents)
480	{
481	function (static_cast<watcher >(w), revents);
482	}
483
484	// simple callback
485	template<class K, void (K::*method)()>
486	void set (K *object) throw ()
487	{
488	set_ (object, method_noargs_thunk<K, method>);
489	}
490
491	template<class K, void (K::*method)()>
492	static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
493	{
494	K obj = static_cast<K >(w->data);
495	(obj->*method) ();
496	}
497
498	void operator ()(int events = EV_UNDEF)
499	{
500	return ev_cb (static_cast<ev_watcher *>(this))
501	(static_cast<ev_watcher *>(this), events);
502	}
503
504	bool is_active () const throw ()
505	{
506	return ev_is_active (static_cast<const ev_watcher *>(this));
507	}
508
509	bool is_pending () const throw ()
510	{
511	return ev_is_pending (static_cast<const ev_watcher *>(this));
512	}
513
514	void feed_event (int revents) throw ()
515	{
516	ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
517	}
518	};
519
520	inline tstamp now () throw ()
521	{
522	return ev_time ();
523	}
524
525	inline void delay (tstamp interval) throw ()
526	{
527	ev_sleep (interval);
528	}
529
530	inline int version_major () throw ()
531	{
532	return ev_version_major ();
533	}
534
535	inline int version_minor () throw ()
536	{
537	return ev_version_minor ();
538	}
539
540	inline unsigned int supported_backends () throw ()
541	{
542	return ev_supported_backends ();
543	}
544
545	inline unsigned int recommended_backends () throw ()
546	{
547	return ev_recommended_backends ();
548	}
549
550	inline unsigned int embeddable_backends () throw ()
551	{
552	return ev_embeddable_backends ();
553	}
554
555	inline void set_allocator (void (cb)(void *ptr, long size)) throw ()
556	{
557	ev_set_allocator (cb);
558	}
559
560	inline void set_syserr_cb (void (cb)(const char msg)) throw ()
561	{
562	ev_set_syserr_cb (cb);
563	}
564
565	#if EV_MULTIPLICITY
566	#define EV_CONSTRUCT(cppstem,cstem) \
567	(EV_PX = get_default_loop ()) throw () \
568	: base<ev_ ## cstem, cppstem> (EV_A) \
569	{ \
570	}
571	#else
572	#define EV_CONSTRUCT(cppstem,cstem) \
573	() throw () \
574	{ \
575	}
576	#endif
577
578	/* using a template here would require quite a bit more lines,
579	* so a macro solution was chosen */
580	#define EV_BEGIN_WATCHER(cppstem,cstem) \
581	\
582	struct cppstem : base<ev_ ## cstem, cppstem> \
583	{ \
584	void start () throw () \
585	{ \
586	ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
587	} \
588	\
589	void stop () throw () \
590	{ \
591	ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
592	} \
593	\
594	cppstem EV_CONSTRUCT(cppstem,cstem) \
595	\
596	~cppstem () throw () \
597	{ \
598	stop (); \
599	} \
600	\
601	using base<ev_ ## cstem, cppstem>::set; \
602	\
603	private: \
604	\
605	cppstem (const cppstem &o); \
606	\
607	cppstem &operator =(const cppstem &o); \
608	\
609	public:
610
611	#define EV_END_WATCHER(cppstem,cstem) \
612	};
613
614	EV_BEGIN_WATCHER (io, io)
615	void set (int fd, int events) throw ()
616	{
617	int active = is_active ();
618	if (active) stop ();
619	ev_io_set (static_cast<ev_io *>(this), fd, events);
620	if (active) start ();
621	}
622
623	void set (int events) throw ()
624	{
625	int active = is_active ();
626	if (active) stop ();
627	ev_io_set (static_cast<ev_io *>(this), fd, events);
628	if (active) start ();
629	}
630
631	void start (int fd, int events) throw ()
632	{
633	set (fd, events);
634	start ();
635	}
636	EV_END_WATCHER (io, io)
637
638	EV_BEGIN_WATCHER (timer, timer)
639	void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
640	{
641	int active = is_active ();
642	if (active) stop ();
643	ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
644	if (active) start ();
645	}
646
647	void start (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
648	{
649	set (after, repeat);
650	start ();
651	}
652
653	void again () throw ()
654	{
655	ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
656	}
657	EV_END_WATCHER (timer, timer)
658
659	#if EV_PERIODIC_ENABLE
660	EV_BEGIN_WATCHER (periodic, periodic)
661	void set (ev_tstamp at, ev_tstamp interval = 0.) throw ()
662	{
663	int active = is_active ();
664	if (active) stop ();
665	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
666	if (active) start ();
667	}
668
669	void start (ev_tstamp at, ev_tstamp interval = 0.) throw ()
670	{
671	set (at, interval);
672	start ();
673	}
674
675	void again () throw ()
676	{
677	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
678	}
679	EV_END_WATCHER (periodic, periodic)
680	#endif
681
682	EV_BEGIN_WATCHER (sig, signal)
683	void set (int signum) throw ()
684	{
685	int active = is_active ();
686	if (active) stop ();
687	ev_signal_set (static_cast<ev_signal *>(this), signum);
688	if (active) start ();
689	}
690
691	void start (int signum) throw ()
692	{
693	set (signum);
694	start ();
695	}
696	EV_END_WATCHER (sig, signal)
697
698	EV_BEGIN_WATCHER (child, child)
699	void set (int pid, int trace = 0) throw ()
700	{
701	int active = is_active ();
702	if (active) stop ();
703	ev_child_set (static_cast<ev_child *>(this), pid, trace);
704	if (active) start ();
705	}
706
707	void start (int pid, int trace = 0) throw ()
708	{
709	set (pid, trace);
710	start ();
711	}
712	EV_END_WATCHER (child, child)
713
714	#if EV_STAT_ENABLE
715	EV_BEGIN_WATCHER (stat, stat)
716	void set (const char *path, ev_tstamp interval = 0.) throw ()
717	{
718	int active = is_active ();
719	if (active) stop ();
720	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
721	if (active) start ();
722	}
723
724	void start (const char *path, ev_tstamp interval = 0.) throw ()
725	{
726	stop ();
727	set (path, interval);
728	start ();
729	}
730
731	void update () throw ()
732	{
733	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
734	}
735	EV_END_WATCHER (stat, stat)
736	#endif
737
738	EV_BEGIN_WATCHER (idle, idle)
739	void set () throw () { }
740	EV_END_WATCHER (idle, idle)
741
742	EV_BEGIN_WATCHER (prepare, prepare)
743	void set () throw () { }
744	EV_END_WATCHER (prepare, prepare)
745
746	EV_BEGIN_WATCHER (check, check)
747	void set () throw () { }
748	EV_END_WATCHER (check, check)
749
750	#if EV_EMBED_ENABLE
751	EV_BEGIN_WATCHER (embed, embed)
752	void set (struct ev_loop *embedded_loop) throw ()
753	{
754	int active = is_active ();
755	if (active) stop ();
756	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
757	if (active) start ();
758	}
759
760	void start (struct ev_loop *embedded_loop) throw ()
761	{
762	set (embedded_loop);
763	start ();
764	}
765
766	void sweep ()
767	{
768	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
769	}
770	EV_END_WATCHER (embed, embed)
771	#endif
772
773	#if EV_FORK_ENABLE
774	EV_BEGIN_WATCHER (fork, fork)
775	void set () throw () { }
776	EV_END_WATCHER (fork, fork)
777	#endif
778
779	#if EV_ASYNC_ENABLE
780	EV_BEGIN_WATCHER (async, async)
781	void set () throw () { }
782
783	void send () throw ()
784	{
785	ev_async_send (EV_A_ static_cast<ev_async *>(this));
786	}
787
788	bool async_pending () throw ()
789	{
790	return ev_async_pending (static_cast<ev_async *>(this));
791	}
792	EV_END_WATCHER (async, async)
793	#endif
794
795	#undef EV_PX
796	#undef EV_PX_
797	#undef EV_CONSTRUCT
798	#undef EV_BEGIN_WATCHER
799	#undef EV_END_WATCHER
800	}
801
802	#endif
803