libev/ev%2B%2B.h

/*
 * libev simple C++ wrapper classes
 *
 * Copyright (c) 2007,2008,2010 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 == (const EV_P) const throw ()
    {
      return this->EV_AX == EV_A;
    }

    bool operator != (const EV_P) const throw ()
    {
      return (*this == EV_A);
    }

    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 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);
    }

#if EV_MINIMAL < 2
    unsigned int count () const throw ()
    {
      return ev_loop_count (EV_AX);
    }

    unsigned int depth () const throw ()
    {
      return ev_loop_depth (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);
    }
#endif

    // 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);
    }

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

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

    // no-argument 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)
    {
      static_cast<K *>(arg)->*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_P) 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_ (const void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) throw ()
    {
      this->data = (void *)data;
      ev_set_cb (static_cast<ev_watcher *>(this), cb);
    }

    // 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);
    }

    // method callback
    template<class K, void (K::*method)(watcher &w, int)>
    void set (K *object) throw ()
    {
      set_ (object, method_thunk<K, method>);
    }

    // default method == operator ()
    template<class K>
    void set (K *object) throw ()
    {
      set_ (object, method_thunk<K, &K::operator ()>);
    }

    template<class K, void (K::*method)(watcher &w, int)>
    static void method_thunk (EV_P_ ev_watcher *w, int revents)
    {
      (static_cast<K *>(w->data)->*method)
        (*static_cast<watcher *>(w), revents);
    }

    // no-argument 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)
    {
      static_cast<K *>(w->data)->*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_tstamp remaining ()
    {
      return ev_timer_remaining (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

  #if EV_SIGNAL_ENABLE
  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)
  #endif

  #if EV_CHILD_ENABLE
  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)
  #endif

  #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

  #if EV_IDLE_ENABLE
  EV_BEGIN_WATCHER (idle, idle)
    void set () throw () { }
  EV_END_WATCHER (idle, idle)
  #endif

  #if EV_PREPARE_ENABLE
  EV_BEGIN_WATCHER (prepare, prepare)
    void set () throw () { }
  EV_END_WATCHER (prepare, prepare)
  #endif

  #if EV_CHECK_ENABLE
  EV_BEGIN_WATCHER (check, check)
    void set () throw () { }
  EV_END_WATCHER (check, check)
  #endif

  #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:	1.48
Committed:	Wed Mar 10 09:23:07 2010 UTC (14 years, 2 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.47:	+11 -3 lines
Log Message:	* empty log message *
#	Content
1	/*
2	* libev simple C++ wrapper classes
3	*
4	* Copyright (c) 2007,2008,2010 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 == (const EV_P) const throw ()
166	{
167	return this->EV_AX == EV_A;
168	}
169
170	bool operator != (const EV_P) const throw ()
171	{
172	return (*this == EV_A);
173	}
174
175	operator struct ev_loop * () const throw ()
176	{
177	return EV_AX;
178	}
179
180	operator const struct ev_loop * () const throw ()
181	{
182	return EV_AX;
183	}
184
185	bool is_default () const throw ()
186	{
187	return EV_AX == ev_default_loop (0);
188	}
189	#endif
190
191	void loop (int flags = 0)
192	{
193	ev_loop (EV_AX_ flags);
194	}
195
196	void unloop (how_t how = ONE) throw ()
197	{
198	ev_unloop (EV_AX_ how);
199	}
200
201	void post_fork () throw ()
202	{
203	#if EV_MULTIPLICITY
204	ev_loop_fork (EV_AX);
205	#else
206	ev_default_fork ();
207	#endif
208	}
209
210	unsigned int backend () const throw ()
211	{
212	return ev_backend (EV_AX);
213	}
214
215	tstamp now () const throw ()
216	{
217	return ev_now (EV_AX);
218	}
219
220	void ref () throw ()
221	{
222	ev_ref (EV_AX);
223	}
224
225	void unref () throw ()
226	{
227	ev_unref (EV_AX);
228	}
229
230	#if EV_MINIMAL < 2
231	unsigned int count () const throw ()
232	{
233	return ev_loop_count (EV_AX);
234	}
235
236	unsigned int depth () const throw ()
237	{
238	return ev_loop_depth (EV_AX);
239	}
240
241	void set_io_collect_interval (tstamp interval) throw ()
242	{
243	ev_set_io_collect_interval (EV_AX_ interval);
244	}
245
246	void set_timeout_collect_interval (tstamp interval) throw ()
247	{
248	ev_set_timeout_collect_interval (EV_AX_ interval);
249	}
250	#endif
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	// default method == operator ()
266	template<class K>
267	void once (int fd, int events, tstamp timeout, K *object) throw ()
268	{
269	once (fd, events, timeout, method_thunk<K, &K::operator ()>, object);
270	}
271
272	template<class K, void (K::*method)(int)>
273	static void method_thunk (int revents, void *arg)
274	{
275	static_cast<K >(arg)->method
276	(revents);
277	}
278
279	// no-argument method callback
280	template<class K, void (K::*method)()>
281	void once (int fd, int events, tstamp timeout, K *object) throw ()
282	{
283	once (fd, events, timeout, method_noargs_thunk<K, method>, object);
284	}
285
286	template<class K, void (K::*method)()>
287	static void method_noargs_thunk (int revents, void *arg)
288	{
289	static_cast<K >(arg)->method
290	();
291	}
292
293	// simpler function callback
294	template<void (*cb)(int)>
295	void once (int fd, int events, tstamp timeout) throw ()
296	{
297	once (fd, events, timeout, simpler_func_thunk<cb>);
298	}
299
300	template<void (*cb)(int)>
301	static void simpler_func_thunk (int revents, void *arg)
302	{
303	(*cb)
304	(revents);
305	}
306
307	// simplest function callback
308	template<void (*cb)()>
309	void once (int fd, int events, tstamp timeout) throw ()
310	{
311	once (fd, events, timeout, simplest_func_thunk<cb>);
312	}
313
314	template<void (*cb)()>
315	static void simplest_func_thunk (int revents, void *arg)
316	{
317	(*cb)
318	();
319	}
320
321	void feed_fd_event (int fd, int revents) throw ()
322	{
323	ev_feed_fd_event (EV_AX_ fd, revents);
324	}
325
326	void feed_signal_event (int signum) throw ()
327	{
328	ev_feed_signal_event (EV_AX_ signum);
329	}
330
331	#if EV_MULTIPLICITY
332	struct ev_loop* EV_AX;
333	#endif
334
335	};
336
337	#if EV_MULTIPLICITY
338	struct dynamic_loop : loop_ref
339	{
340
341	dynamic_loop (unsigned int flags = AUTO) throw (bad_loop)
342	: loop_ref (ev_loop_new (flags))
343	{
344	if (!EV_AX)
345	throw bad_loop ();
346	}
347
348	~dynamic_loop () throw ()
349	{
350	ev_loop_destroy (EV_AX);
351	EV_AX = 0;
352	}
353
354	private:
355
356	dynamic_loop (const dynamic_loop &);
357
358	dynamic_loop & operator= (const dynamic_loop &);
359
360	};
361	#endif
362
363	struct default_loop : loop_ref
364	{
365	default_loop (unsigned int flags = AUTO) throw (bad_loop)
366	#if EV_MULTIPLICITY
367	: loop_ref (ev_default_loop (flags))
368	#endif
369	{
370	if (
371	#if EV_MULTIPLICITY
372	!EV_AX
373	#else
374	!ev_default_loop (flags)
375	#endif
376	)
377	throw bad_loop ();
378	}
379
380	~default_loop () throw ()
381	{
382	ev_default_destroy ();
383	}
384
385	private:
386	default_loop (const default_loop &);
387	default_loop &operator = (const default_loop &);
388	};
389
390	inline loop_ref get_default_loop () throw ()
391	{
392	#if EV_MULTIPLICITY
393	return ev_default_loop (0);
394	#else
395	return loop_ref ();
396	#endif
397	}
398
399	#undef EV_AX
400	#undef EV_AX_
401
402	#undef EV_PX
403	#undef EV_PX_
404	#if EV_MULTIPLICITY
405	# define EV_PX loop_ref EV_A
406	# define EV_PX_ loop_ref EV_A_
407	#else
408	# define EV_PX
409	# define EV_PX_
410	#endif
411
412	template<class ev_watcher, class watcher>
413	struct base : ev_watcher
414	{
415	#if EV_MULTIPLICITY
416	EV_PX;
417
418	void set (EV_P) throw ()
419	{
420	this->EV_A = EV_A;
421	}
422	#endif
423
424	base (EV_PX) throw ()
425	#if EV_MULTIPLICITY
426	: EV_A (EV_A)
427	#endif
428	{
429	ev_init (this, 0);
430	}
431
432	void set_ (const void data, void (cb)(EV_P_ ev_watcher *w, int revents)) throw ()
433	{
434	this->data = (void *)data;
435	ev_set_cb (static_cast<ev_watcher *>(this), cb);
436	}
437
438	// function callback
439	template<void (*function)(watcher &w, int)>
440	void set (void *data = 0) throw ()
441	{
442	set_ (data, function_thunk<function>);
443	}
444
445	template<void (*function)(watcher &w, int)>
446	static void function_thunk (EV_P_ ev_watcher *w, int revents)
447	{
448	function
449	(static_cast<watcher >(w), revents);
450	}
451
452	// method callback
453	template<class K, void (K::*method)(watcher &w, int)>
454	void set (K *object) throw ()
455	{
456	set_ (object, method_thunk<K, method>);
457	}
458
459	// default method == operator ()
460	template<class K>
461	void set (K *object) throw ()
462	{
463	set_ (object, method_thunk<K, &K::operator ()>);
464	}
465
466	template<class K, void (K::*method)(watcher &w, int)>
467	static void method_thunk (EV_P_ ev_watcher *w, int revents)
468	{
469	(static_cast<K >(w->data)->method)
470	(static_cast<watcher >(w), revents);
471	}
472
473	// no-argument callback
474	template<class K, void (K::*method)()>
475	void set (K *object) throw ()
476	{
477	set_ (object, method_noargs_thunk<K, method>);
478	}
479
480	template<class K, void (K::*method)()>
481	static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
482	{
483	static_cast<K >(w->data)->method
484	();
485	}
486
487	void operator ()(int events = EV_UNDEF)
488	{
489	return
490	ev_cb (static_cast<ev_watcher *>(this))
491	(static_cast<ev_watcher *>(this), events);
492	}
493
494	bool is_active () const throw ()
495	{
496	return ev_is_active (static_cast<const ev_watcher *>(this));
497	}
498
499	bool is_pending () const throw ()
500	{
501	return ev_is_pending (static_cast<const ev_watcher *>(this));
502	}
503
504	void feed_event (int revents) throw ()
505	{
506	ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
507	}
508	};
509
510	inline tstamp now () throw ()
511	{
512	return ev_time ();
513	}
514
515	inline void delay (tstamp interval) throw ()
516	{
517	ev_sleep (interval);
518	}
519
520	inline int version_major () throw ()
521	{
522	return ev_version_major ();
523	}
524
525	inline int version_minor () throw ()
526	{
527	return ev_version_minor ();
528	}
529
530	inline unsigned int supported_backends () throw ()
531	{
532	return ev_supported_backends ();
533	}
534
535	inline unsigned int recommended_backends () throw ()
536	{
537	return ev_recommended_backends ();
538	}
539
540	inline unsigned int embeddable_backends () throw ()
541	{
542	return ev_embeddable_backends ();
543	}
544
545	inline void set_allocator (void (cb)(void *ptr, long size)) throw ()
546	{
547	ev_set_allocator (cb);
548	}
549
550	inline void set_syserr_cb (void (cb)(const char msg)) throw ()
551	{
552	ev_set_syserr_cb (cb);
553	}
554
555	#if EV_MULTIPLICITY
556	#define EV_CONSTRUCT(cppstem,cstem) \
557	(EV_PX = get_default_loop ()) throw () \
558	: base<ev_ ## cstem, cppstem> (EV_A) \
559	{ \
560	}
561	#else
562	#define EV_CONSTRUCT(cppstem,cstem) \
563	() throw () \
564	{ \
565	}
566	#endif
567
568	/* using a template here would require quite a bit more lines,
569	* so a macro solution was chosen */
570	#define EV_BEGIN_WATCHER(cppstem,cstem) \
571	\
572	struct cppstem : base<ev_ ## cstem, cppstem> \
573	{ \
574	void start () throw () \
575	{ \
576	ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
577	} \
578	\
579	void stop () throw () \
580	{ \
581	ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
582	} \
583	\
584	cppstem EV_CONSTRUCT(cppstem,cstem) \
585	\
586	~cppstem () throw () \
587	{ \
588	stop (); \
589	} \
590	\
591	using base<ev_ ## cstem, cppstem>::set; \
592	\
593	private: \
594	\
595	cppstem (const cppstem &o); \
596	\
597	cppstem &operator =(const cppstem &o); \
598	\
599	public:
600
601	#define EV_END_WATCHER(cppstem,cstem) \
602	};
603
604	EV_BEGIN_WATCHER (io, io)
605	void set (int fd, int events) throw ()
606	{
607	int active = is_active ();
608	if (active) stop ();
609	ev_io_set (static_cast<ev_io *>(this), fd, events);
610	if (active) start ();
611	}
612
613	void set (int events) throw ()
614	{
615	int active = is_active ();
616	if (active) stop ();
617	ev_io_set (static_cast<ev_io *>(this), fd, events);
618	if (active) start ();
619	}
620
621	void start (int fd, int events) throw ()
622	{
623	set (fd, events);
624	start ();
625	}
626	EV_END_WATCHER (io, io)
627
628	EV_BEGIN_WATCHER (timer, timer)
629	void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
630	{
631	int active = is_active ();
632	if (active) stop ();
633	ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
634	if (active) start ();
635	}
636
637	void start (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
638	{
639	set (after, repeat);
640	start ();
641	}
642
643	void again () throw ()
644	{
645	ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
646	}
647
648	ev_tstamp remaining ()
649	{
650	return ev_timer_remaining (EV_A_ static_cast<ev_timer *>(this));
651	}
652	EV_END_WATCHER (timer, timer)
653
654	#if EV_PERIODIC_ENABLE
655	EV_BEGIN_WATCHER (periodic, periodic)
656	void set (ev_tstamp at, ev_tstamp interval = 0.) throw ()
657	{
658	int active = is_active ();
659	if (active) stop ();
660	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
661	if (active) start ();
662	}
663
664	void start (ev_tstamp at, ev_tstamp interval = 0.) throw ()
665	{
666	set (at, interval);
667	start ();
668	}
669
670	void again () throw ()
671	{
672	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
673	}
674	EV_END_WATCHER (periodic, periodic)
675	#endif
676
677	#if EV_SIGNAL_ENABLE
678	EV_BEGIN_WATCHER (sig, signal)
679	void set (int signum) throw ()
680	{
681	int active = is_active ();
682	if (active) stop ();
683	ev_signal_set (static_cast<ev_signal *>(this), signum);
684	if (active) start ();
685	}
686
687	void start (int signum) throw ()
688	{
689	set (signum);
690	start ();
691	}
692	EV_END_WATCHER (sig, signal)
693	#endif
694
695	#if EV_CHILD_ENABLE
696	EV_BEGIN_WATCHER (child, child)
697	void set (int pid, int trace = 0) throw ()
698	{
699	int active = is_active ();
700	if (active) stop ();
701	ev_child_set (static_cast<ev_child *>(this), pid, trace);
702	if (active) start ();
703	}
704
705	void start (int pid, int trace = 0) throw ()
706	{
707	set (pid, trace);
708	start ();
709	}
710	EV_END_WATCHER (child, child)
711	#endif
712
713	#if EV_STAT_ENABLE
714	EV_BEGIN_WATCHER (stat, stat)
715	void set (const char *path, ev_tstamp interval = 0.) throw ()
716	{
717	int active = is_active ();
718	if (active) stop ();
719	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
720	if (active) start ();
721	}
722
723	void start (const char *path, ev_tstamp interval = 0.) throw ()
724	{
725	stop ();
726	set (path, interval);
727	start ();
728	}
729
730	void update () throw ()
731	{
732	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
733	}
734	EV_END_WATCHER (stat, stat)
735	#endif
736
737	#if EV_IDLE_ENABLE
738	EV_BEGIN_WATCHER (idle, idle)
739	void set () throw () { }
740	EV_END_WATCHER (idle, idle)
741	#endif
742
743	#if EV_PREPARE_ENABLE
744	EV_BEGIN_WATCHER (prepare, prepare)
745	void set () throw () { }
746	EV_END_WATCHER (prepare, prepare)
747	#endif
748
749	#if EV_CHECK_ENABLE
750	EV_BEGIN_WATCHER (check, check)
751	void set () throw () { }
752	EV_END_WATCHER (check, check)
753	#endif
754
755	#if EV_EMBED_ENABLE
756	EV_BEGIN_WATCHER (embed, embed)
757	void set (struct ev_loop *embedded_loop) throw ()
758	{
759	int active = is_active ();
760	if (active) stop ();
761	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
762	if (active) start ();
763	}
764
765	void start (struct ev_loop *embedded_loop) throw ()
766	{
767	set (embedded_loop);
768	start ();
769	}
770
771	void sweep ()
772	{
773	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
774	}
775	EV_END_WATCHER (embed, embed)
776	#endif
777
778	#if EV_FORK_ENABLE
779	EV_BEGIN_WATCHER (fork, fork)
780	void set () throw () { }
781	EV_END_WATCHER (fork, fork)
782	#endif
783
784	#if EV_ASYNC_ENABLE
785	EV_BEGIN_WATCHER (async, async)
786	void set () throw () { }
787
788	void send () throw ()
789	{
790	ev_async_send (EV_A_ static_cast<ev_async *>(this));
791	}
792
793	bool async_pending () throw ()
794	{
795	return ev_async_pending (static_cast<ev_async *>(this));
796	}
797	EV_END_WATCHER (async, async)
798	#endif
799
800	#undef EV_PX
801	#undef EV_PX_
802	#undef EV_CONSTRUCT
803	#undef EV_BEGIN_WATCHER
804	#undef EV_END_WATCHER
805	}
806
807	#endif
808