libev/ev%2B%2B.h

/*
 * libev simple C++ wrapper classes
 *
 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modifica-
 * tion, are permitted provided that the following conditions are met:
 * 
 *   1.  Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 * 
 *   2.  Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Alternatively, the contents of this file may be used under the terms of
 * the GNU General Public License ("GPL") version 2 or any later version,
 * in which case the provisions of the GPL are applicable instead of
 * the above. If you wish to allow the use of your version of this file
 * only under the terms of the GPL and not to allow others to use your
 * version of this file under the BSD license, indicate your decision
 * by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL. If you do not delete the
 * provisions above, a recipient may use your version of this file under
 * either the BSD or the GPL.
 */

#ifndef EVPP_H__
#define EVPP_H__

#ifdef EV_H
# include EV_H
#else
# include "ev.h"
#endif

#ifndef EV_USE_STDEXCEPT
# define EV_USE_STDEXCEPT 1
#endif

#if EV_USE_STDEXCEPT
# include <stdexcept>
#endif

namespace ev {

  typedef ev_tstamp tstamp;

  enum
  {
    UNDEF    = EV_UNDEF,
    NONE     = EV_NONE,
    READ     = EV_READ,
    WRITE    = EV_WRITE,
    TIMEOUT  = EV_TIMEOUT,
    PERIODIC = EV_PERIODIC,
    SIGNAL   = EV_SIGNAL,
    CHILD    = EV_CHILD,
    STAT     = EV_STAT,
    IDLE     = EV_IDLE,
    CHECK    = EV_CHECK,
    PREPARE  = EV_PREPARE,
    FORK     = EV_FORK,
    ASYNC    = EV_ASYNC,
    EMBED    = EV_EMBED,
#   undef ERROR // some systems stupidly #define ERROR
    ERROR    = EV_ERROR,
  };

  enum
  {
    AUTO      = EVFLAG_AUTO,
    NOENV     = EVFLAG_NOENV,
    FORKCHECK = EVFLAG_FORKCHECK,

    SELECT    = EVBACKEND_SELECT,
    POLL      = EVBACKEND_POLL,
    EPOLL     = EVBACKEND_EPOLL,
    KQUEUE    = EVBACKEND_KQUEUE,
    DEVPOLL   = EVBACKEND_DEVPOLL,
    PORT      = EVBACKEND_PORT
  };

  enum
  {
    NONBLOCK = EVLOOP_NONBLOCK,
    ONESHOT  = EVLOOP_ONESHOT
  };

  enum how_t
  {
    ONE = EVUNLOOP_ONE,
    ALL = EVUNLOOP_ALL
  };

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

#ifdef EV_AX
#  undef EV_AX
#endif

#ifdef EV_AX_
#  undef EV_AX_
#endif

#if EV_MULTIPLICITY
#  define EV_AX  raw_loop
#  define EV_AX_ raw_loop,
#else
#  define EV_AX
#  define EV_AX_
#endif

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

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

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

#if EV_MULTIPLICITY
    bool operator == (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 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);
    }

    // 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_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:	1.44
Committed:	Wed Dec 3 15:23:44 2008 UTC (15 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-3_51, rel-3_53, rel-3_52, rel-3_6
Changes since 1.43:	+52 -72 lines
Log Message:	* empty log message *
#	Content
1	/*
2	* libev simple C++ wrapper classes
3	*
4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.
6	*
7	* Redistribution and use in source and binary forms, with or without modifica-
8	* tion, are permitted provided that the following conditions are met:
9	*
10	* 1. Redistributions of source code must retain the above copyright notice,
11	* this list of conditions and the following disclaimer.
12	*
13	* 2. Redistributions in binary form must reproduce the above copyright
14	* notice, this list of conditions and the following disclaimer in the
15	* documentation and/or other materials provided with the distribution.
16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26	* OF THE POSSIBILITY OF SUCH DAMAGE.
27	*
28	* Alternatively, the contents of this file may be used under the terms of
29	* the GNU General Public License ("GPL") version 2 or any later version,
30	* in which case the provisions of the GPL are applicable instead of
31	* the above. If you wish to allow the use of your version of this file
32	* only under the terms of the GPL and not to allow others to use your
33	* version of this file under the BSD license, indicate your decision
34	* by deleting the provisions above and replace them with the notice
35	* and other provisions required by the GPL. If you do not delete the
36	* provisions above, a recipient may use your version of this file under
37	* either the BSD or the GPL.
38	*/
39
40	#ifndef EVPP_H__
41	#define EVPP_H__
42
43	#ifdef EV_H
44	# include EV_H
45	#else
46	# include "ev.h"
47	#endif
48
49	#ifndef EV_USE_STDEXCEPT
50	# define EV_USE_STDEXCEPT 1
51	#endif
52
53	#if EV_USE_STDEXCEPT
54	# include <stdexcept>
55	#endif
56
57	namespace ev {
58
59	typedef ev_tstamp tstamp;
60
61	enum
62	{
63	UNDEF = EV_UNDEF,
64	NONE = EV_NONE,
65	READ = EV_READ,
66	WRITE = EV_WRITE,
67	TIMEOUT = EV_TIMEOUT,
68	PERIODIC = EV_PERIODIC,
69	SIGNAL = EV_SIGNAL,
70	CHILD = EV_CHILD,
71	STAT = EV_STAT,
72	IDLE = EV_IDLE,
73	CHECK = EV_CHECK,
74	PREPARE = EV_PREPARE,
75	FORK = EV_FORK,
76	ASYNC = EV_ASYNC,
77	EMBED = EV_EMBED,
78	# undef ERROR // some systems stupidly #define ERROR
79	ERROR = EV_ERROR,
80	};
81
82	enum
83	{
84	AUTO = EVFLAG_AUTO,
85	NOENV = EVFLAG_NOENV,
86	FORKCHECK = EVFLAG_FORKCHECK,
87
88	SELECT = EVBACKEND_SELECT,
89	POLL = EVBACKEND_POLL,
90	EPOLL = EVBACKEND_EPOLL,
91	KQUEUE = EVBACKEND_KQUEUE,
92	DEVPOLL = EVBACKEND_DEVPOLL,
93	PORT = EVBACKEND_PORT
94	};
95
96	enum
97	{
98	NONBLOCK = EVLOOP_NONBLOCK,
99	ONESHOT = EVLOOP_ONESHOT
100	};
101
102	enum how_t
103	{
104	ONE = EVUNLOOP_ONE,
105	ALL = EVUNLOOP_ALL
106	};
107
108	struct bad_loop
109	#if EV_USE_STDEXCEPT
110	: std::runtime_error
111	#endif
112	{
113	#if EV_USE_STDEXCEPT
114	bad_loop ()
115	: std::runtime_error ("libev event loop cannot be initialized, bad value of LIBEV_FLAGS?")
116	{
117	}
118	#endif
119	};
120
121	#ifdef EV_AX
122	# undef EV_AX
123	#endif
124
125	#ifdef EV_AX_
126	# undef EV_AX_
127	#endif
128
129	#if EV_MULTIPLICITY
130	# define EV_AX raw_loop
131	# define EV_AX_ raw_loop,
132	#else
133	# define EV_AX
134	# define EV_AX_
135	#endif
136
137	struct loop_ref
138	{
139	loop_ref (EV_P) throw ()
140	#if EV_MULTIPLICITY
141	: EV_AX (EV_A)
142	#endif
143	{
144	}
145
146	bool operator == (const loop_ref &other) const throw ()
147	{
148	#if EV_MULTIPLICITY
149	return EV_AX == other.EV_AX;
150	#else
151	return true;
152	#endif
153	}
154
155	bool operator != (const loop_ref &other) const throw ()
156	{
157	#if EV_MULTIPLICITY
158	return ! (*this == other);
159	#else
160	return false;
161	#endif
162	}
163
164	#if EV_MULTIPLICITY
165	bool operator == (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 count () const throw ()
211	{
212	return ev_loop_count (EV_AX);
213	}
214
215	unsigned int backend () const throw ()
216	{
217	return ev_backend (EV_AX);
218	}
219
220	tstamp now () const throw ()
221	{
222	return ev_now (EV_AX);
223	}
224
225	void ref () throw ()
226	{
227	ev_ref (EV_AX);
228	}
229
230	void unref () throw ()
231	{
232	ev_unref (EV_AX);
233	}
234
235	void set_io_collect_interval (tstamp interval) throw ()
236	{
237	ev_set_io_collect_interval (EV_AX_ interval);
238	}
239
240	void set_timeout_collect_interval (tstamp interval) throw ()
241	{
242	ev_set_timeout_collect_interval (EV_AX_ interval);
243	}
244
245	// function callback
246	void once (int fd, int events, tstamp timeout, void (cb)(int, void ), void *arg = 0) throw ()
247	{
248	ev_once (EV_AX_ fd, events, timeout, cb, arg);
249	}
250
251	// method callback
252	template<class K, void (K::*method)(int)>
253	void once (int fd, int events, tstamp timeout, K *object) throw ()
254	{
255	once (fd, events, timeout, method_thunk<K, method>, object);
256	}
257
258	// default method == operator ()
259	template<class K>
260	void once (int fd, int events, tstamp timeout, K *object) throw ()
261	{
262	once (fd, events, timeout, method_thunk<K, &K::operator ()>, object);
263	}
264
265	template<class K, void (K::*method)(int)>
266	static void method_thunk (int revents, void *arg)
267	{
268	static_cast<K >(arg)->method
269	(revents);
270	}
271
272	// no-argument method callback
273	template<class K, void (K::*method)()>
274	void once (int fd, int events, tstamp timeout, K *object) throw ()
275	{
276	once (fd, events, timeout, method_noargs_thunk<K, method>, object);
277	}
278
279	template<class K, void (K::*method)()>
280	static void method_noargs_thunk (int revents, void *arg)
281	{
282	static_cast<K >(arg)->method
283	();
284	}
285
286	// simpler function callback
287	template<void (*cb)(int)>
288	void once (int fd, int events, tstamp timeout) throw ()
289	{
290	once (fd, events, timeout, simpler_func_thunk<cb>);
291	}
292
293	template<void (*cb)(int)>
294	static void simpler_func_thunk (int revents, void *arg)
295	{
296	(*cb)
297	(revents);
298	}
299
300	// simplest function callback
301	template<void (*cb)()>
302	void once (int fd, int events, tstamp timeout) throw ()
303	{
304	once (fd, events, timeout, simplest_func_thunk<cb>);
305	}
306
307	template<void (*cb)()>
308	static void simplest_func_thunk (int revents, void *arg)
309	{
310	(*cb)
311	();
312	}
313
314	void feed_fd_event (int fd, int revents) throw ()
315	{
316	ev_feed_fd_event (EV_AX_ fd, revents);
317	}
318
319	void feed_signal_event (int signum) throw ()
320	{
321	ev_feed_signal_event (EV_AX_ signum);
322	}
323
324	#if EV_MULTIPLICITY
325	struct ev_loop* EV_AX;
326	#endif
327
328	};
329
330	#if EV_MULTIPLICITY
331	struct dynamic_loop : loop_ref
332	{
333
334	dynamic_loop (unsigned int flags = AUTO) throw (bad_loop)
335	: loop_ref (ev_loop_new (flags))
336	{
337	if (!EV_AX)
338	throw bad_loop ();
339	}
340
341	~dynamic_loop () throw ()
342	{
343	ev_loop_destroy (EV_AX);
344	EV_AX = 0;
345	}
346
347	private:
348
349	dynamic_loop (const dynamic_loop &);
350
351	dynamic_loop & operator= (const dynamic_loop &);
352
353	};
354	#endif
355
356	struct default_loop : loop_ref
357	{
358	default_loop (unsigned int flags = AUTO) throw (bad_loop)
359	#if EV_MULTIPLICITY
360	: loop_ref (ev_default_loop (flags))
361	#endif
362	{
363	if (
364	#if EV_MULTIPLICITY
365	!EV_AX
366	#else
367	!ev_default_loop (flags)
368	#endif
369	)
370	throw bad_loop ();
371	}
372
373	~default_loop () throw ()
374	{
375	ev_default_destroy ();
376	}
377
378	private:
379	default_loop (const default_loop &);
380	default_loop &operator = (const default_loop &);
381	};
382
383	inline loop_ref get_default_loop () throw ()
384	{
385	#if EV_MULTIPLICITY
386	return ev_default_loop (0);
387	#else
388	return loop_ref ();
389	#endif
390	}
391
392	#undef EV_AX
393	#undef EV_AX_
394
395	#undef EV_PX
396	#undef EV_PX_
397	#if EV_MULTIPLICITY
398	# define EV_PX loop_ref EV_A
399	# define EV_PX_ loop_ref EV_A_
400	#else
401	# define EV_PX
402	# define EV_PX_
403	#endif
404
405	template<class ev_watcher, class watcher>
406	struct base : ev_watcher
407	{
408	#if EV_MULTIPLICITY
409	EV_PX;
410
411	void set (EV_P) throw ()
412	{
413	this->EV_A = EV_A;
414	}
415	#endif
416
417	base (EV_PX) throw ()
418	#if EV_MULTIPLICITY
419	: EV_A (EV_A)
420	#endif
421	{
422	ev_init (this, 0);
423	}
424
425	void set_ (const void data, void (cb)(EV_P_ ev_watcher *w, int revents)) throw ()
426	{
427	this->data = (void *)data;
428	ev_set_cb (static_cast<ev_watcher *>(this), cb);
429	}
430
431	// function callback
432	template<void (*function)(watcher &w, int)>
433	void set (void *data = 0) throw ()
434	{
435	set_ (data, function_thunk<function>);
436	}
437
438	template<void (*function)(watcher &w, int)>
439	static void function_thunk (EV_P_ ev_watcher *w, int revents)
440	{
441	function
442	(static_cast<watcher >(w), revents);
443	}
444
445	// method callback
446	template<class K, void (K::*method)(watcher &w, int)>
447	void set (K *object) throw ()
448	{
449	set_ (object, method_thunk<K, method>);
450	}
451
452	// default method == operator ()
453	template<class K>
454	void set (K *object) throw ()
455	{
456	set_ (object, method_thunk<K, &K::operator ()>);
457	}
458
459	template<class K, void (K::*method)(watcher &w, int)>
460	static void method_thunk (EV_P_ ev_watcher *w, int revents)
461	{
462	(static_cast<K >(w->data)->method)
463	(static_cast<watcher >(w), revents);
464	}
465
466	// no-argument callback
467	template<class K, void (K::*method)()>
468	void set (K *object) throw ()
469	{
470	set_ (object, method_noargs_thunk<K, method>);
471	}
472
473	template<class K, void (K::*method)()>
474	static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
475	{
476	static_cast<K >(w->data)->method
477	();
478	}
479
480	void operator ()(int events = EV_UNDEF)
481	{
482	return
483	ev_cb (static_cast<ev_watcher *>(this))
484	(static_cast<ev_watcher *>(this), events);
485	}
486
487	bool is_active () const throw ()
488	{
489	return ev_is_active (static_cast<const ev_watcher *>(this));
490	}
491
492	bool is_pending () const throw ()
493	{
494	return ev_is_pending (static_cast<const ev_watcher *>(this));
495	}
496
497	void feed_event (int revents) throw ()
498	{
499	ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
500	}
501	};
502
503	inline tstamp now () throw ()
504	{
505	return ev_time ();
506	}
507
508	inline void delay (tstamp interval) throw ()
509	{
510	ev_sleep (interval);
511	}
512
513	inline int version_major () throw ()
514	{
515	return ev_version_major ();
516	}
517
518	inline int version_minor () throw ()
519	{
520	return ev_version_minor ();
521	}
522
523	inline unsigned int supported_backends () throw ()
524	{
525	return ev_supported_backends ();
526	}
527
528	inline unsigned int recommended_backends () throw ()
529	{
530	return ev_recommended_backends ();
531	}
532
533	inline unsigned int embeddable_backends () throw ()
534	{
535	return ev_embeddable_backends ();
536	}
537
538	inline void set_allocator (void (cb)(void *ptr, long size)) throw ()
539	{
540	ev_set_allocator (cb);
541	}
542
543	inline void set_syserr_cb (void (cb)(const char msg)) throw ()
544	{
545	ev_set_syserr_cb (cb);
546	}
547
548	#if EV_MULTIPLICITY
549	#define EV_CONSTRUCT(cppstem,cstem) \
550	(EV_PX = get_default_loop ()) throw () \
551	: base<ev_ ## cstem, cppstem> (EV_A) \
552	{ \
553	}
554	#else
555	#define EV_CONSTRUCT(cppstem,cstem) \
556	() throw () \
557	{ \
558	}
559	#endif
560
561	/* using a template here would require quite a bit more lines,
562	* so a macro solution was chosen */
563	#define EV_BEGIN_WATCHER(cppstem,cstem) \
564	\
565	struct cppstem : base<ev_ ## cstem, cppstem> \
566	{ \
567	void start () throw () \
568	{ \
569	ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
570	} \
571	\
572	void stop () throw () \
573	{ \
574	ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
575	} \
576	\
577	cppstem EV_CONSTRUCT(cppstem,cstem) \
578	\
579	~cppstem () throw () \
580	{ \
581	stop (); \
582	} \
583	\
584	using base<ev_ ## cstem, cppstem>::set; \
585	\
586	private: \
587	\
588	cppstem (const cppstem &o); \
589	\
590	cppstem &operator =(const cppstem &o); \
591	\
592	public:
593
594	#define EV_END_WATCHER(cppstem,cstem) \
595	};
596
597	EV_BEGIN_WATCHER (io, io)
598	void set (int fd, int events) throw ()
599	{
600	int active = is_active ();
601	if (active) stop ();
602	ev_io_set (static_cast<ev_io *>(this), fd, events);
603	if (active) start ();
604	}
605
606	void set (int events) throw ()
607	{
608	int active = is_active ();
609	if (active) stop ();
610	ev_io_set (static_cast<ev_io *>(this), fd, events);
611	if (active) start ();
612	}
613
614	void start (int fd, int events) throw ()
615	{
616	set (fd, events);
617	start ();
618	}
619	EV_END_WATCHER (io, io)
620
621	EV_BEGIN_WATCHER (timer, timer)
622	void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
623	{
624	int active = is_active ();
625	if (active) stop ();
626	ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
627	if (active) start ();
628	}
629
630	void start (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
631	{
632	set (after, repeat);
633	start ();
634	}
635
636	void again () throw ()
637	{
638	ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
639	}
640	EV_END_WATCHER (timer, timer)
641
642	#if EV_PERIODIC_ENABLE
643	EV_BEGIN_WATCHER (periodic, periodic)
644	void set (ev_tstamp at, ev_tstamp interval = 0.) throw ()
645	{
646	int active = is_active ();
647	if (active) stop ();
648	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
649	if (active) start ();
650	}
651
652	void start (ev_tstamp at, ev_tstamp interval = 0.) throw ()
653	{
654	set (at, interval);
655	start ();
656	}
657
658	void again () throw ()
659	{
660	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
661	}
662	EV_END_WATCHER (periodic, periodic)
663	#endif
664
665	EV_BEGIN_WATCHER (sig, signal)
666	void set (int signum) throw ()
667	{
668	int active = is_active ();
669	if (active) stop ();
670	ev_signal_set (static_cast<ev_signal *>(this), signum);
671	if (active) start ();
672	}
673
674	void start (int signum) throw ()
675	{
676	set (signum);
677	start ();
678	}
679	EV_END_WATCHER (sig, signal)
680
681	EV_BEGIN_WATCHER (child, child)
682	void set (int pid, int trace = 0) throw ()
683	{
684	int active = is_active ();
685	if (active) stop ();
686	ev_child_set (static_cast<ev_child *>(this), pid, trace);
687	if (active) start ();
688	}
689
690	void start (int pid, int trace = 0) throw ()
691	{
692	set (pid, trace);
693	start ();
694	}
695	EV_END_WATCHER (child, child)
696
697	#if EV_STAT_ENABLE
698	EV_BEGIN_WATCHER (stat, stat)
699	void set (const char *path, ev_tstamp interval = 0.) throw ()
700	{
701	int active = is_active ();
702	if (active) stop ();
703	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
704	if (active) start ();
705	}
706
707	void start (const char *path, ev_tstamp interval = 0.) throw ()
708	{
709	stop ();
710	set (path, interval);
711	start ();
712	}
713
714	void update () throw ()
715	{
716	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
717	}
718	EV_END_WATCHER (stat, stat)
719	#endif
720
721	EV_BEGIN_WATCHER (idle, idle)
722	void set () throw () { }
723	EV_END_WATCHER (idle, idle)
724
725	EV_BEGIN_WATCHER (prepare, prepare)
726	void set () throw () { }
727	EV_END_WATCHER (prepare, prepare)
728
729	EV_BEGIN_WATCHER (check, check)
730	void set () throw () { }
731	EV_END_WATCHER (check, check)
732
733	#if EV_EMBED_ENABLE
734	EV_BEGIN_WATCHER (embed, embed)
735	void set (struct ev_loop *embedded_loop) throw ()
736	{
737	int active = is_active ();
738	if (active) stop ();
739	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
740	if (active) start ();
741	}
742
743	void start (struct ev_loop *embedded_loop) throw ()
744	{
745	set (embedded_loop);
746	start ();
747	}
748
749	void sweep ()
750	{
751	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
752	}
753	EV_END_WATCHER (embed, embed)
754	#endif
755
756	#if EV_FORK_ENABLE
757	EV_BEGIN_WATCHER (fork, fork)
758	void set () throw () { }
759	EV_END_WATCHER (fork, fork)
760	#endif
761
762	#if EV_ASYNC_ENABLE
763	EV_BEGIN_WATCHER (async, async)
764	void set () throw () { }
765
766	void send () throw ()
767	{
768	ev_async_send (EV_A_ static_cast<ev_async *>(this));
769	}
770
771	bool async_pending () throw ()
772	{
773	return ev_async_pending (static_cast<ev_async *>(this));
774	}
775	EV_END_WATCHER (async, async)
776	#endif
777
778	#undef EV_PX
779	#undef EV_PX_
780	#undef EV_CONSTRUCT
781	#undef EV_BEGIN_WATCHER
782	#undef EV_END_WATCHER
783	}
784
785	#endif
786