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,
    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:	1.41
Committed:	Tue Sep 30 18:35:47 2008 UTC (15 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-3_45, rel-3_48
Changes since 1.40:	+10 -9 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	ERROR = EV_ERROR,
78	};
79
80	enum
81	{
82	AUTO = EVFLAG_AUTO,
83	NOENV = EVFLAG_NOENV,
84	FORKCHECK = EVFLAG_FORKCHECK,
85
86	SELECT = EVBACKEND_SELECT,
87	POLL = EVBACKEND_POLL,
88	EPOLL = EVBACKEND_EPOLL,
89	KQUEUE = EVBACKEND_KQUEUE,
90	DEVPOLL = EVBACKEND_DEVPOLL,
91	PORT = EVBACKEND_PORT
92	};
93
94	enum
95	{
96	NONBLOCK = EVLOOP_NONBLOCK,
97	ONESHOT = EVLOOP_ONESHOT
98	};
99
100	enum how_t
101	{
102	ONE = EVUNLOOP_ONE,
103	ALL = EVUNLOOP_ALL
104	};
105
106	struct bad_loop
107	#if EV_USE_STDEXCEPT
108	: std::runtime_error
109	#endif
110	{
111	#if EV_USE_STDEXCEPT
112	bad_loop ()
113	: std::runtime_error ("libev event loop cannot be initialized, bad value of LIBEV_FLAGS?")
114	{
115	}
116	#endif
117	};
118
119	#ifdef EV_AX
120	# undef EV_AX
121	#endif
122
123	#ifdef EV_AX_
124	# undef EV_AX_
125	#endif
126
127	#if EV_MULTIPLICITY
128	# define EV_AX raw_loop
129	# define EV_AX_ raw_loop,
130	#else
131	# define EV_AX
132	# define EV_AX_
133	#endif
134
135	struct loop_ref
136	{
137	loop_ref (EV_P) throw ()
138	#if EV_MULTIPLICITY
139	: EV_AX (EV_A)
140	#endif
141	{
142	}
143
144	bool operator == (const loop_ref &other) const throw ()
145	{
146	#if EV_MULTIPLICITY
147	return EV_AX == other.EV_AX;
148	#else
149	return true;
150	#endif
151	}
152
153	bool operator != (const loop_ref &other) const throw ()
154	{
155	#if EV_MULTIPLICITY
156	return ! (*this == other);
157	#else
158	return false;
159	#endif
160	}
161
162	#if EV_MULTIPLICITY
163	bool operator == (struct ev_loop *other) const throw ()
164	{
165	return this->EV_AX == other;
166	}
167
168	bool operator != (struct ev_loop *other) const throw ()
169	{
170	return ! (*this == other);
171	}
172
173	bool operator == (const struct ev_loop *other) const throw ()
174	{
175	return this->EV_AX == other;
176	}
177
178	bool operator != (const struct ev_loop *other) const throw ()
179	{
180	return (*this == other);
181	}
182
183	operator struct ev_loop * () const throw ()
184	{
185	return EV_AX;
186	}
187
188	operator const struct ev_loop * () const throw ()
189	{
190	return EV_AX;
191	}
192
193	bool is_default () const throw ()
194	{
195	return EV_AX == ev_default_loop (0);
196	}
197	#endif
198
199	void loop (int flags = 0)
200	{
201	ev_loop (EV_AX_ flags);
202	}
203
204	void unloop (how_t how = ONE) throw ()
205	{
206	ev_unloop (EV_AX_ how);
207	}
208
209	void post_fork () throw ()
210	{
211	#if EV_MULTIPLICITY
212	ev_loop_fork (EV_AX);
213	#else
214	ev_default_fork ();
215	#endif
216	}
217
218	unsigned int count () const throw ()
219	{
220	return ev_loop_count (EV_AX);
221	}
222
223	unsigned int backend () const throw ()
224	{
225	return ev_backend (EV_AX);
226	}
227
228	tstamp now () const throw ()
229	{
230	return ev_now (EV_AX);
231	}
232
233	void ref () throw ()
234	{
235	ev_ref (EV_AX);
236	}
237
238	void unref () throw ()
239	{
240	ev_unref (EV_AX);
241	}
242
243	void set_io_collect_interval (tstamp interval) throw ()
244	{
245	ev_set_io_collect_interval (EV_AX_ interval);
246	}
247
248	void set_timeout_collect_interval (tstamp interval) throw ()
249	{
250	ev_set_timeout_collect_interval (EV_AX_ interval);
251	}
252
253	// function callback
254	void once (int fd, int events, tstamp timeout, void (cb)(int, void ), void* arg = 0) throw ()
255	{
256	ev_once (EV_AX_ fd, events, timeout, cb, arg);
257	}
258
259	// method callback
260	template<class K, void (K::*method)(int)>
261	void once (int fd, int events, tstamp timeout, K *object) throw ()
262	{
263	once (fd, events, timeout, method_thunk<K, method>, object);
264	}
265
266	template<class K, void (K::*method)(int)>
267	static void method_thunk (int revents, void* arg)
268	{
269	K obj = static_cast<K >(arg);
270	(obj->*method) (revents);
271	}
272
273	// const method callback
274	template<class K, void (K::*method)(int) const>
275	void once (int fd, int events, tstamp timeout, const K *object) throw ()
276	{
277	once (fd, events, timeout, const_method_thunk<K, method>, object);
278	}
279
280	template<class K, void (K::*method)(int) const>
281	static void const_method_thunk (int revents, void* arg)
282	{
283	K obj = static_cast<K >(arg);
284	(obj->*method) (revents);
285	}
286
287	// simple method callback
288	template<class K, void (K::*method)()>
289	void once (int fd, int events, tstamp timeout, K *object) throw ()
290	{
291	once (fd, events, timeout, method_noargs_thunk<K, method>, object);
292	}
293
294	template<class K, void (K::*method)()>
295	static void method_noargs_thunk (int revents, void* arg)
296	{
297	K obj = static_cast<K >(arg);
298	(obj->*method) ();
299	}
300
301	// simpler function callback
302	template<void (*cb)(int)>
303	void once (int fd, int events, tstamp timeout) throw ()
304	{
305	once (fd, events, timeout, simpler_func_thunk<cb>);
306	}
307
308	template<void (*cb)(int)>
309	static void simpler_func_thunk (int revents, void* arg)
310	{
311	(*cb) (revents);
312	}
313
314	// simplest function callback
315	template<void (*cb)()>
316	void once (int fd, int events, tstamp timeout) throw ()
317	{
318	once (fd, events, timeout, simplest_func_thunk<cb>);
319	}
320
321	template<void (*cb)()>
322	static void simplest_func_thunk (int revents, void* arg)
323	{
324	(*cb) ();
325	}
326
327	void feed_fd_event (int fd, int revents) throw ()
328	{
329	ev_feed_fd_event (EV_AX_ fd, revents);
330	}
331
332	void feed_signal_event (int signum) throw ()
333	{
334	ev_feed_signal_event (EV_AX_ signum);
335	}
336
337	#if EV_MULTIPLICITY
338	struct ev_loop* EV_AX;
339	#endif
340
341	};
342
343	#if EV_MULTIPLICITY
344	struct dynamic_loop : loop_ref
345	{
346
347	dynamic_loop (unsigned int flags = AUTO) throw (bad_loop)
348	: loop_ref (ev_loop_new (flags))
349	{
350	if (!EV_AX)
351	throw bad_loop ();
352	}
353
354	~dynamic_loop () throw ()
355	{
356	ev_loop_destroy (EV_AX);
357	EV_AX = 0;
358	}
359
360	private:
361
362	dynamic_loop (const dynamic_loop &);
363
364	dynamic_loop & operator= (const dynamic_loop &);
365
366	};
367	#endif
368
369	struct default_loop : loop_ref
370	{
371	default_loop (unsigned int flags = AUTO) throw (bad_loop)
372	#if EV_MULTIPLICITY
373	: loop_ref (ev_default_loop (flags))
374	#endif
375	{
376	if (
377	#if EV_MULTIPLICITY
378	!EV_AX
379	#else
380	!ev_default_loop (flags)
381	#endif
382	)
383	throw bad_loop ();
384	}
385
386	~default_loop () throw ()
387	{
388	ev_default_destroy ();
389	}
390
391	private:
392	default_loop (const default_loop &);
393	default_loop &operator = (const default_loop &);
394	};
395
396	inline loop_ref get_default_loop () throw ()
397	{
398	#if EV_MULTIPLICITY
399	return ev_default_loop (0);
400	#else
401	return loop_ref ();
402	#endif
403	}
404
405	#undef EV_AX
406	#undef EV_AX_
407
408	#undef EV_PX
409	#undef EV_PX_
410	#if EV_MULTIPLICITY
411	# define EV_PX loop_ref EV_A
412	# define EV_PX_ loop_ref EV_A_
413	#else
414	# define EV_PX
415	# define EV_PX_
416	#endif
417
418	template<class ev_watcher, class watcher>
419	struct base : ev_watcher
420	{
421	#if EV_MULTIPLICITY
422	EV_PX;
423
424	void set (EV_PX) throw ()
425	{
426	this->EV_A = EV_A;
427	}
428	#endif
429
430	base (EV_PX) throw ()
431	#if EV_MULTIPLICITY
432	: EV_A (EV_A)
433	#endif
434	{
435	ev_init (this, 0);
436	}
437
438	void set_ (void data, void (cb)(EV_P_ ev_watcher *w, int revents)) throw ()
439	{
440	this->data = data;
441	ev_set_cb (static_cast<ev_watcher *>(this), cb);
442	}
443
444	// method callback
445	template<class K, void (K::*method)(watcher &w, int)>
446	void set (K *object) throw ()
447	{
448	set_ (object, method_thunk<K, method>);
449	}
450
451	template<class K, void (K::*method)(watcher &w, int)>
452	static void method_thunk (EV_P_ ev_watcher *w, int revents)
453	{
454	K obj = static_cast<K >(w->data);
455	(obj->method) (static_cast<watcher *>(w), revents);
456	}
457
458	// const method callback
459	template<class K, void (K::*method)(watcher &w, int) const>
460	void set (const K *object) throw ()
461	{
462	set_ (object, const_method_thunk<K, method>);
463	}
464
465	template<class K, void (K::*method)(watcher &w, int) const>
466	static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
467	{
468	K obj = static_cast<K >(w->data);
469	(static_cast<K >(w->data)->method) (static_cast<watcher >(w), revents);
470	}
471
472	// function callback
473	template<void (*function)(watcher &w, int)>
474	void set (void *data = 0) throw ()
475	{
476	set_ (data, function_thunk<function>);
477	}
478
479	template<void (*function)(watcher &w, int)>
480	static void function_thunk (EV_P_ ev_watcher *w, int revents)
481	{
482	function (static_cast<watcher >(w), revents);
483	}
484
485	// simple callback
486	template<class K, void (K::*method)()>
487	void set (K *object) throw ()
488	{
489	set_ (object, method_noargs_thunk<K, method>);
490	}
491
492	template<class K, void (K::*method)()>
493	static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
494	{
495	K obj = static_cast<K >(w->data);
496	(obj->*method) ();
497	}
498
499	void operator ()(int events = EV_UNDEF)
500	{
501	return ev_cb (static_cast<ev_watcher *>(this))
502	(static_cast<ev_watcher *>(this), events);
503	}
504
505	bool is_active () const throw ()
506	{
507	return ev_is_active (static_cast<const ev_watcher *>(this));
508	}
509
510	bool is_pending () const throw ()
511	{
512	return ev_is_pending (static_cast<const ev_watcher *>(this));
513	}
514
515	void feed_event (int revents) throw ()
516	{
517	ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
518	}
519	};
520
521	inline tstamp now () throw ()
522	{
523	return ev_time ();
524	}
525
526	inline void delay (tstamp interval) throw ()
527	{
528	ev_sleep (interval);
529	}
530
531	inline int version_major () throw ()
532	{
533	return ev_version_major ();
534	}
535
536	inline int version_minor () throw ()
537	{
538	return ev_version_minor ();
539	}
540
541	inline unsigned int supported_backends () throw ()
542	{
543	return ev_supported_backends ();
544	}
545
546	inline unsigned int recommended_backends () throw ()
547	{
548	return ev_recommended_backends ();
549	}
550
551	inline unsigned int embeddable_backends () throw ()
552	{
553	return ev_embeddable_backends ();
554	}
555
556	inline void set_allocator (void (cb)(void *ptr, long size)) throw ()
557	{
558	ev_set_allocator (cb);
559	}
560
561	inline void set_syserr_cb (void (cb)(const char msg)) throw ()
562	{
563	ev_set_syserr_cb (cb);
564	}
565
566	#if EV_MULTIPLICITY
567	#define EV_CONSTRUCT(cppstem,cstem) \
568	(EV_PX = get_default_loop ()) throw () \
569	: base<ev_ ## cstem, cppstem> (EV_A) \
570	{ \
571	}
572	#else
573	#define EV_CONSTRUCT(cppstem,cstem) \
574	() throw () \
575	{ \
576	}
577	#endif
578
579	/* using a template here would require quite a bit more lines,
580	* so a macro solution was chosen */
581	#define EV_BEGIN_WATCHER(cppstem,cstem) \
582	\
583	struct cppstem : base<ev_ ## cstem, cppstem> \
584	{ \
585	void start () throw () \
586	{ \
587	ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
588	} \
589	\
590	void stop () throw () \
591	{ \
592	ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
593	} \
594	\
595	cppstem EV_CONSTRUCT(cppstem,cstem) \
596	\
597	~cppstem () throw () \
598	{ \
599	stop (); \
600	} \
601	\
602	using base<ev_ ## cstem, cppstem>::set; \
603	\
604	private: \
605	\
606	cppstem (const cppstem &o); \
607	\
608	cppstem &operator =(const cppstem &o); \
609	\
610	public:
611
612	#define EV_END_WATCHER(cppstem,cstem) \
613	};
614
615	EV_BEGIN_WATCHER (io, io)
616	void set (int fd, int events) throw ()
617	{
618	int active = is_active ();
619	if (active) stop ();
620	ev_io_set (static_cast<ev_io *>(this), fd, events);
621	if (active) start ();
622	}
623
624	void set (int events) throw ()
625	{
626	int active = is_active ();
627	if (active) stop ();
628	ev_io_set (static_cast<ev_io *>(this), fd, events);
629	if (active) start ();
630	}
631
632	void start (int fd, int events) throw ()
633	{
634	set (fd, events);
635	start ();
636	}
637	EV_END_WATCHER (io, io)
638
639	EV_BEGIN_WATCHER (timer, timer)
640	void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
641	{
642	int active = is_active ();
643	if (active) stop ();
644	ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
645	if (active) start ();
646	}
647
648	void start (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
649	{
650	set (after, repeat);
651	start ();
652	}
653
654	void again () throw ()
655	{
656	ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
657	}
658	EV_END_WATCHER (timer, timer)
659
660	#if EV_PERIODIC_ENABLE
661	EV_BEGIN_WATCHER (periodic, periodic)
662	void set (ev_tstamp at, ev_tstamp interval = 0.) throw ()
663	{
664	int active = is_active ();
665	if (active) stop ();
666	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
667	if (active) start ();
668	}
669
670	void start (ev_tstamp at, ev_tstamp interval = 0.) throw ()
671	{
672	set (at, interval);
673	start ();
674	}
675
676	void again () throw ()
677	{
678	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
679	}
680	EV_END_WATCHER (periodic, periodic)
681	#endif
682
683	EV_BEGIN_WATCHER (sig, signal)
684	void set (int signum) throw ()
685	{
686	int active = is_active ();
687	if (active) stop ();
688	ev_signal_set (static_cast<ev_signal *>(this), signum);
689	if (active) start ();
690	}
691
692	void start (int signum) throw ()
693	{
694	set (signum);
695	start ();
696	}
697	EV_END_WATCHER (sig, signal)
698
699	EV_BEGIN_WATCHER (child, child)
700	void set (int pid, int trace = 0) throw ()
701	{
702	int active = is_active ();
703	if (active) stop ();
704	ev_child_set (static_cast<ev_child *>(this), pid, trace);
705	if (active) start ();
706	}
707
708	void start (int pid, int trace = 0) throw ()
709	{
710	set (pid, trace);
711	start ();
712	}
713	EV_END_WATCHER (child, child)
714
715	#if EV_STAT_ENABLE
716	EV_BEGIN_WATCHER (stat, stat)
717	void set (const char *path, ev_tstamp interval = 0.) throw ()
718	{
719	int active = is_active ();
720	if (active) stop ();
721	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
722	if (active) start ();
723	}
724
725	void start (const char *path, ev_tstamp interval = 0.) throw ()
726	{
727	stop ();
728	set (path, interval);
729	start ();
730	}
731
732	void update () throw ()
733	{
734	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
735	}
736	EV_END_WATCHER (stat, stat)
737	#endif
738
739	EV_BEGIN_WATCHER (idle, idle)
740	void set () throw () { }
741	EV_END_WATCHER (idle, idle)
742
743	EV_BEGIN_WATCHER (prepare, prepare)
744	void set () throw () { }
745	EV_END_WATCHER (prepare, prepare)
746
747	EV_BEGIN_WATCHER (check, check)
748	void set () throw () { }
749	EV_END_WATCHER (check, check)
750
751	#if EV_EMBED_ENABLE
752	EV_BEGIN_WATCHER (embed, embed)
753	void set (struct ev_loop *embedded_loop) throw ()
754	{
755	int active = is_active ();
756	if (active) stop ();
757	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
758	if (active) start ();
759	}
760
761	void start (struct ev_loop *embedded_loop) throw ()
762	{
763	set (embedded_loop);
764	start ();
765	}
766
767	void sweep ()
768	{
769	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
770	}
771	EV_END_WATCHER (embed, embed)
772	#endif
773
774	#if EV_FORK_ENABLE
775	EV_BEGIN_WATCHER (fork, fork)
776	void set () throw () { }
777	EV_END_WATCHER (fork, fork)
778	#endif
779
780	#if EV_ASYNC_ENABLE
781	EV_BEGIN_WATCHER (async, async)
782	void set () throw () { }
783
784	void send () throw ()
785	{
786	ev_async_send (EV_A_ static_cast<ev_async *>(this));
787	}
788
789	bool async_pending () throw ()
790	{
791	return ev_async_pending (static_cast<ev_async *>(this));
792	}
793	EV_END_WATCHER (async, async)
794	#endif
795
796	#undef EV_PX
797	#undef EV_PX_
798	#undef EV_CONSTRUCT
799	#undef EV_BEGIN_WATCHER
800	#undef EV_END_WATCHER
801	}
802
803	#endif
804