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,
#if EV_COMPAT3
    TIMEOUT  = EV_TIMEOUT,
#endif
    TIMER    = EV_TIMER,
    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
  {
#if EV_COMPAT3
    NONBLOCK = EVLOOP_NONBLOCK,
    ONESHOT  = EVLOOP_ONESHOT,
#endif
    NOWAIT   = EVRUN_NOWAIT,
    ONCE     = EVRUN_ONCE
  };

  enum how_t
  {
    ONE = EVBREAK_ONE,
    ALL = EVBREAK_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

#if EV_COMPAT3
    void loop (int flags = 0)
    {
      ev_run (EV_AX_ flags);
    }

    void unloop (how_t how = ONE) throw ()
    {
      ev_break (EV_AX_ how);
    }
#endif

    void run (int flags = 0)
    {
      ev_run (EV_AX_ flags);
    }

    void break_loop (how_t how = ONE) throw ()
    {
      ev_break (EV_AX_ how);
    }

    void post_fork () throw ()
    {
      ev_loop_fork (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);
    }

#if EV_FEATURE_API
    unsigned int iteration () const throw ()
    {
      return ev_iteration (EV_AX);
    }

    unsigned int depth () const throw ()
    {
      return ev_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 ();
    }

  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;

      // loop set
      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 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:	1.55
Committed:	Sun Oct 24 17:58:41 2010 UTC (13 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-4_00
Changes since 1.54:	+0 -9 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	#if EV_COMPAT3
68	TIMEOUT = EV_TIMEOUT,
69	#endif
70	TIMER = EV_TIMER,
71	PERIODIC = EV_PERIODIC,
72	SIGNAL = EV_SIGNAL,
73	CHILD = EV_CHILD,
74	STAT = EV_STAT,
75	IDLE = EV_IDLE,
76	CHECK = EV_CHECK,
77	PREPARE = EV_PREPARE,
78	FORK = EV_FORK,
79	ASYNC = EV_ASYNC,
80	EMBED = EV_EMBED,
81	# undef ERROR // some systems stupidly #define ERROR
82	ERROR = EV_ERROR
83	};
84
85	enum
86	{
87	AUTO = EVFLAG_AUTO,
88	NOENV = EVFLAG_NOENV,
89	FORKCHECK = EVFLAG_FORKCHECK,
90
91	SELECT = EVBACKEND_SELECT,
92	POLL = EVBACKEND_POLL,
93	EPOLL = EVBACKEND_EPOLL,
94	KQUEUE = EVBACKEND_KQUEUE,
95	DEVPOLL = EVBACKEND_DEVPOLL,
96	PORT = EVBACKEND_PORT
97	};
98
99	enum
100	{
101	#if EV_COMPAT3
102	NONBLOCK = EVLOOP_NONBLOCK,
103	ONESHOT = EVLOOP_ONESHOT,
104	#endif
105	NOWAIT = EVRUN_NOWAIT,
106	ONCE = EVRUN_ONCE
107	};
108
109	enum how_t
110	{
111	ONE = EVBREAK_ONE,
112	ALL = EVBREAK_ALL
113	};
114
115	struct bad_loop
116	#if EV_USE_STDEXCEPT
117	: std::runtime_error
118	#endif
119	{
120	#if EV_USE_STDEXCEPT
121	bad_loop ()
122	: std::runtime_error ("libev event loop cannot be initialized, bad value of LIBEV_FLAGS?")
123	{
124	}
125	#endif
126	};
127
128	#ifdef EV_AX
129	# undef EV_AX
130	#endif
131
132	#ifdef EV_AX_
133	# undef EV_AX_
134	#endif
135
136	#if EV_MULTIPLICITY
137	# define EV_AX raw_loop
138	# define EV_AX_ raw_loop,
139	#else
140	# define EV_AX
141	# define EV_AX_
142	#endif
143
144	struct loop_ref
145	{
146	loop_ref (EV_P) throw ()
147	#if EV_MULTIPLICITY
148	: EV_AX (EV_A)
149	#endif
150	{
151	}
152
153	bool operator == (const loop_ref &other) const throw ()
154	{
155	#if EV_MULTIPLICITY
156	return EV_AX == other.EV_AX;
157	#else
158	return true;
159	#endif
160	}
161
162	bool operator != (const loop_ref &other) const throw ()
163	{
164	#if EV_MULTIPLICITY
165	return ! (*this == other);
166	#else
167	return false;
168	#endif
169	}
170
171	#if EV_MULTIPLICITY
172	bool operator == (const EV_P) const throw ()
173	{
174	return this->EV_AX == EV_A;
175	}
176
177	bool operator != (const EV_P) const throw ()
178	{
179	return (*this == EV_A);
180	}
181
182	operator struct ev_loop * () const throw ()
183	{
184	return EV_AX;
185	}
186
187	operator const struct ev_loop * () const throw ()
188	{
189	return EV_AX;
190	}
191
192	bool is_default () const throw ()
193	{
194	return EV_AX == ev_default_loop (0);
195	}
196	#endif
197
198	#if EV_COMPAT3
199	void loop (int flags = 0)
200	{
201	ev_run (EV_AX_ flags);
202	}
203
204	void unloop (how_t how = ONE) throw ()
205	{
206	ev_break (EV_AX_ how);
207	}
208	#endif
209
210	void run (int flags = 0)
211	{
212	ev_run (EV_AX_ flags);
213	}
214
215	void break_loop (how_t how = ONE) throw ()
216	{
217	ev_break (EV_AX_ how);
218	}
219
220	void post_fork () throw ()
221	{
222	ev_loop_fork (EV_AX);
223	}
224
225	unsigned int backend () const throw ()
226	{
227	return ev_backend (EV_AX);
228	}
229
230	tstamp now () const throw ()
231	{
232	return ev_now (EV_AX);
233	}
234
235	void ref () throw ()
236	{
237	ev_ref (EV_AX);
238	}
239
240	void unref () throw ()
241	{
242	ev_unref (EV_AX);
243	}
244
245	#if EV_FEATURE_API
246	unsigned int iteration () const throw ()
247	{
248	return ev_iteration (EV_AX);
249	}
250
251	unsigned int depth () const throw ()
252	{
253	return ev_depth (EV_AX);
254	}
255
256	void set_io_collect_interval (tstamp interval) throw ()
257	{
258	ev_set_io_collect_interval (EV_AX_ interval);
259	}
260
261	void set_timeout_collect_interval (tstamp interval) throw ()
262	{
263	ev_set_timeout_collect_interval (EV_AX_ interval);
264	}
265	#endif
266
267	// function callback
268	void once (int fd, int events, tstamp timeout, void (cb)(int, void ), void *arg = 0) throw ()
269	{
270	ev_once (EV_AX_ fd, events, timeout, cb, arg);
271	}
272
273	// method callback
274	template<class K, void (K::*method)(int)>
275	void once (int fd, int events, tstamp timeout, K *object) throw ()
276	{
277	once (fd, events, timeout, method_thunk<K, method>, object);
278	}
279
280	// default method == operator ()
281	template<class K>
282	void once (int fd, int events, tstamp timeout, K *object) throw ()
283	{
284	once (fd, events, timeout, method_thunk<K, &K::operator ()>, object);
285	}
286
287	template<class K, void (K::*method)(int)>
288	static void method_thunk (int revents, void *arg)
289	{
290	static_cast<K >(arg)->method
291	(revents);
292	}
293
294	// no-argument method callback
295	template<class K, void (K::*method)()>
296	void once (int fd, int events, tstamp timeout, K *object) throw ()
297	{
298	once (fd, events, timeout, method_noargs_thunk<K, method>, object);
299	}
300
301	template<class K, void (K::*method)()>
302	static void method_noargs_thunk (int revents, void *arg)
303	{
304	static_cast<K >(arg)->method
305	();
306	}
307
308	// simpler function callback
309	template<void (*cb)(int)>
310	void once (int fd, int events, tstamp timeout) throw ()
311	{
312	once (fd, events, timeout, simpler_func_thunk<cb>);
313	}
314
315	template<void (*cb)(int)>
316	static void simpler_func_thunk (int revents, void *arg)
317	{
318	(*cb)
319	(revents);
320	}
321
322	// simplest function callback
323	template<void (*cb)()>
324	void once (int fd, int events, tstamp timeout) throw ()
325	{
326	once (fd, events, timeout, simplest_func_thunk<cb>);
327	}
328
329	template<void (*cb)()>
330	static void simplest_func_thunk (int revents, void *arg)
331	{
332	(*cb)
333	();
334	}
335
336	void feed_fd_event (int fd, int revents) throw ()
337	{
338	ev_feed_fd_event (EV_AX_ fd, revents);
339	}
340
341	void feed_signal_event (int signum) throw ()
342	{
343	ev_feed_signal_event (EV_AX_ signum);
344	}
345
346	#if EV_MULTIPLICITY
347	struct ev_loop* EV_AX;
348	#endif
349
350	};
351
352	#if EV_MULTIPLICITY
353	struct dynamic_loop : loop_ref
354	{
355
356	dynamic_loop (unsigned int flags = AUTO) throw (bad_loop)
357	: loop_ref (ev_loop_new (flags))
358	{
359	if (!EV_AX)
360	throw bad_loop ();
361	}
362
363	~dynamic_loop () throw ()
364	{
365	ev_loop_destroy (EV_AX);
366	EV_AX = 0;
367	}
368
369	private:
370
371	dynamic_loop (const dynamic_loop &);
372
373	dynamic_loop & operator= (const dynamic_loop &);
374
375	};
376	#endif
377
378	struct default_loop : loop_ref
379	{
380	default_loop (unsigned int flags = AUTO) throw (bad_loop)
381	#if EV_MULTIPLICITY
382	: loop_ref (ev_default_loop (flags))
383	#endif
384	{
385	if (
386	#if EV_MULTIPLICITY
387	!EV_AX
388	#else
389	!ev_default_loop (flags)
390	#endif
391	)
392	throw bad_loop ();
393	}
394
395	private:
396	default_loop (const default_loop &);
397	default_loop &operator = (const default_loop &);
398	};
399
400	inline loop_ref get_default_loop () throw ()
401	{
402	#if EV_MULTIPLICITY
403	return ev_default_loop (0);
404	#else
405	return loop_ref ();
406	#endif
407	}
408
409	#undef EV_AX
410	#undef EV_AX_
411
412	#undef EV_PX
413	#undef EV_PX_
414	#if EV_MULTIPLICITY
415	# define EV_PX loop_ref EV_A
416	# define EV_PX_ loop_ref EV_A_
417	#else
418	# define EV_PX
419	# define EV_PX_
420	#endif
421
422	template<class ev_watcher, class watcher>
423	struct base : ev_watcher
424	{
425	#if EV_MULTIPLICITY
426	EV_PX;
427
428	// loop set
429	void set (EV_P) throw ()
430	{
431	this->EV_A = EV_A;
432	}
433	#endif
434
435	base (EV_PX) throw ()
436	#if EV_MULTIPLICITY
437	: EV_A (EV_A)
438	#endif
439	{
440	ev_init (this, 0);
441	}
442
443	void set_ (const void data, void (cb)(EV_P_ ev_watcher *w, int revents)) throw ()
444	{
445	this->data = (void *)data;
446	ev_set_cb (static_cast<ev_watcher *>(this), cb);
447	}
448
449	// function callback
450	template<void (*function)(watcher &w, int)>
451	void set (void *data = 0) throw ()
452	{
453	set_ (data, function_thunk<function>);
454	}
455
456	template<void (*function)(watcher &w, int)>
457	static void function_thunk (EV_P_ ev_watcher *w, int revents)
458	{
459	function
460	(static_cast<watcher >(w), revents);
461	}
462
463	// method callback
464	template<class K, void (K::*method)(watcher &w, int)>
465	void set (K *object) throw ()
466	{
467	set_ (object, method_thunk<K, method>);
468	}
469
470	// default method == operator ()
471	template<class K>
472	void set (K *object) throw ()
473	{
474	set_ (object, method_thunk<K, &K::operator ()>);
475	}
476
477	template<class K, void (K::*method)(watcher &w, int)>
478	static void method_thunk (EV_P_ ev_watcher *w, int revents)
479	{
480	(static_cast<K >(w->data)->method)
481	(static_cast<watcher >(w), revents);
482	}
483
484	// no-argument callback
485	template<class K, void (K::*method)()>
486	void set (K *object) throw ()
487	{
488	set_ (object, method_noargs_thunk<K, method>);
489	}
490
491	template<class K, void (K::*method)()>
492	static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
493	{
494	(static_cast<K >(w->data)->method)
495	();
496	}
497
498	void operator ()(int events = EV_UNDEF)
499	{
500	return
501	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
659	ev_tstamp remaining ()
660	{
661	return ev_timer_remaining (EV_A_ static_cast<ev_timer *>(this));
662	}
663	EV_END_WATCHER (timer, timer)
664
665	#if EV_PERIODIC_ENABLE
666	EV_BEGIN_WATCHER (periodic, periodic)
667	void set (ev_tstamp at, ev_tstamp interval = 0.) throw ()
668	{
669	int active = is_active ();
670	if (active) stop ();
671	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
672	if (active) start ();
673	}
674
675	void start (ev_tstamp at, ev_tstamp interval = 0.) throw ()
676	{
677	set (at, interval);
678	start ();
679	}
680
681	void again () throw ()
682	{
683	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
684	}
685	EV_END_WATCHER (periodic, periodic)
686	#endif
687
688	#if EV_SIGNAL_ENABLE
689	EV_BEGIN_WATCHER (sig, signal)
690	void set (int signum) throw ()
691	{
692	int active = is_active ();
693	if (active) stop ();
694	ev_signal_set (static_cast<ev_signal *>(this), signum);
695	if (active) start ();
696	}
697
698	void start (int signum) throw ()
699	{
700	set (signum);
701	start ();
702	}
703	EV_END_WATCHER (sig, signal)
704	#endif
705
706	#if EV_CHILD_ENABLE
707	EV_BEGIN_WATCHER (child, child)
708	void set (int pid, int trace = 0) throw ()
709	{
710	int active = is_active ();
711	if (active) stop ();
712	ev_child_set (static_cast<ev_child *>(this), pid, trace);
713	if (active) start ();
714	}
715
716	void start (int pid, int trace = 0) throw ()
717	{
718	set (pid, trace);
719	start ();
720	}
721	EV_END_WATCHER (child, child)
722	#endif
723
724	#if EV_STAT_ENABLE
725	EV_BEGIN_WATCHER (stat, stat)
726	void set (const char *path, ev_tstamp interval = 0.) throw ()
727	{
728	int active = is_active ();
729	if (active) stop ();
730	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
731	if (active) start ();
732	}
733
734	void start (const char *path, ev_tstamp interval = 0.) throw ()
735	{
736	stop ();
737	set (path, interval);
738	start ();
739	}
740
741	void update () throw ()
742	{
743	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
744	}
745	EV_END_WATCHER (stat, stat)
746	#endif
747
748	#if EV_IDLE_ENABLE
749	EV_BEGIN_WATCHER (idle, idle)
750	void set () throw () { }
751	EV_END_WATCHER (idle, idle)
752	#endif
753
754	#if EV_PREPARE_ENABLE
755	EV_BEGIN_WATCHER (prepare, prepare)
756	void set () throw () { }
757	EV_END_WATCHER (prepare, prepare)
758	#endif
759
760	#if EV_CHECK_ENABLE
761	EV_BEGIN_WATCHER (check, check)
762	void set () throw () { }
763	EV_END_WATCHER (check, check)
764	#endif
765
766	#if EV_EMBED_ENABLE
767	EV_BEGIN_WATCHER (embed, embed)
768	void set (struct ev_loop *embedded_loop) throw ()
769	{
770	int active = is_active ();
771	if (active) stop ();
772	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
773	if (active) start ();
774	}
775
776	void start (struct ev_loop *embedded_loop) throw ()
777	{
778	set (embedded_loop);
779	start ();
780	}
781
782	void sweep ()
783	{
784	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
785	}
786	EV_END_WATCHER (embed, embed)
787	#endif
788
789	#if EV_FORK_ENABLE
790	EV_BEGIN_WATCHER (fork, fork)
791	void set () throw () { }
792	EV_END_WATCHER (fork, fork)
793	#endif
794
795	#if EV_ASYNC_ENABLE
796	EV_BEGIN_WATCHER (async, async)
797	void send () throw ()
798	{
799	ev_async_send (EV_A_ static_cast<ev_async *>(this));
800	}
801
802	bool async_pending () throw ()
803	{
804	return ev_async_pending (static_cast<ev_async *>(this));
805	}
806	EV_END_WATCHER (async, async)
807	#endif
808
809	#undef EV_PX
810	#undef EV_PX_
811	#undef EV_CONSTRUCT
812	#undef EV_BEGIN_WATCHER
813	#undef EV_END_WATCHER
814	}
815
816	#endif
817