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 ()
    {
#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_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 ();
    }

    ~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;

      // 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:	1.54
Committed:	Fri Oct 22 05:57:55 2010 UTC (13 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.53:	+24 -5 lines
Log Message:	compat3 for ev++.h, default args c++
#	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	#if EV_MULTIPLICITY
223	ev_loop_fork (EV_AX);
224	#else
225	ev_default_fork ();
226	#endif
227	}
228
229	unsigned int backend () const throw ()
230	{
231	return ev_backend (EV_AX);
232	}
233
234	tstamp now () const throw ()
235	{
236	return ev_now (EV_AX);
237	}
238
239	void ref () throw ()
240	{
241	ev_ref (EV_AX);
242	}
243
244	void unref () throw ()
245	{
246	ev_unref (EV_AX);
247	}
248
249	#if EV_FEATURE_API
250	unsigned int iteration () const throw ()
251	{
252	return ev_iteration (EV_AX);
253	}
254
255	unsigned int depth () const throw ()
256	{
257	return ev_depth (EV_AX);
258	}
259
260	void set_io_collect_interval (tstamp interval) throw ()
261	{
262	ev_set_io_collect_interval (EV_AX_ interval);
263	}
264
265	void set_timeout_collect_interval (tstamp interval) throw ()
266	{
267	ev_set_timeout_collect_interval (EV_AX_ interval);
268	}
269	#endif
270
271	// function callback
272	void once (int fd, int events, tstamp timeout, void (cb)(int, void ), void *arg = 0) throw ()
273	{
274	ev_once (EV_AX_ fd, events, timeout, cb, arg);
275	}
276
277	// method callback
278	template<class K, void (K::*method)(int)>
279	void once (int fd, int events, tstamp timeout, K *object) throw ()
280	{
281	once (fd, events, timeout, method_thunk<K, method>, object);
282	}
283
284	// default method == operator ()
285	template<class K>
286	void once (int fd, int events, tstamp timeout, K *object) throw ()
287	{
288	once (fd, events, timeout, method_thunk<K, &K::operator ()>, object);
289	}
290
291	template<class K, void (K::*method)(int)>
292	static void method_thunk (int revents, void *arg)
293	{
294	static_cast<K >(arg)->method
295	(revents);
296	}
297
298	// no-argument method callback
299	template<class K, void (K::*method)()>
300	void once (int fd, int events, tstamp timeout, K *object) throw ()
301	{
302	once (fd, events, timeout, method_noargs_thunk<K, method>, object);
303	}
304
305	template<class K, void (K::*method)()>
306	static void method_noargs_thunk (int revents, void *arg)
307	{
308	static_cast<K >(arg)->method
309	();
310	}
311
312	// simpler function callback
313	template<void (*cb)(int)>
314	void once (int fd, int events, tstamp timeout) throw ()
315	{
316	once (fd, events, timeout, simpler_func_thunk<cb>);
317	}
318
319	template<void (*cb)(int)>
320	static void simpler_func_thunk (int revents, void *arg)
321	{
322	(*cb)
323	(revents);
324	}
325
326	// simplest function callback
327	template<void (*cb)()>
328	void once (int fd, int events, tstamp timeout) throw ()
329	{
330	once (fd, events, timeout, simplest_func_thunk<cb>);
331	}
332
333	template<void (*cb)()>
334	static void simplest_func_thunk (int revents, void *arg)
335	{
336	(*cb)
337	();
338	}
339
340	void feed_fd_event (int fd, int revents) throw ()
341	{
342	ev_feed_fd_event (EV_AX_ fd, revents);
343	}
344
345	void feed_signal_event (int signum) throw ()
346	{
347	ev_feed_signal_event (EV_AX_ signum);
348	}
349
350	#if EV_MULTIPLICITY
351	struct ev_loop* EV_AX;
352	#endif
353
354	};
355
356	#if EV_MULTIPLICITY
357	struct dynamic_loop : loop_ref
358	{
359
360	dynamic_loop (unsigned int flags = AUTO) throw (bad_loop)
361	: loop_ref (ev_loop_new (flags))
362	{
363	if (!EV_AX)
364	throw bad_loop ();
365	}
366
367	~dynamic_loop () throw ()
368	{
369	ev_loop_destroy (EV_AX);
370	EV_AX = 0;
371	}
372
373	private:
374
375	dynamic_loop (const dynamic_loop &);
376
377	dynamic_loop & operator= (const dynamic_loop &);
378
379	};
380	#endif
381
382	struct default_loop : loop_ref
383	{
384	default_loop (unsigned int flags = AUTO) throw (bad_loop)
385	#if EV_MULTIPLICITY
386	: loop_ref (ev_default_loop (flags))
387	#endif
388	{
389	if (
390	#if EV_MULTIPLICITY
391	!EV_AX
392	#else
393	!ev_default_loop (flags)
394	#endif
395	)
396	throw bad_loop ();
397	}
398
399	~default_loop () throw ()
400	{
401	ev_default_destroy ();
402	}
403
404	private:
405	default_loop (const default_loop &);
406	default_loop &operator = (const default_loop &);
407	};
408
409	inline loop_ref get_default_loop () throw ()
410	{
411	#if EV_MULTIPLICITY
412	return ev_default_loop (0);
413	#else
414	return loop_ref ();
415	#endif
416	}
417
418	#undef EV_AX
419	#undef EV_AX_
420
421	#undef EV_PX
422	#undef EV_PX_
423	#if EV_MULTIPLICITY
424	# define EV_PX loop_ref EV_A
425	# define EV_PX_ loop_ref EV_A_
426	#else
427	# define EV_PX
428	# define EV_PX_
429	#endif
430
431	template<class ev_watcher, class watcher>
432	struct base : ev_watcher
433	{
434	#if EV_MULTIPLICITY
435	EV_PX;
436
437	// loop set
438	void set (EV_P) throw ()
439	{
440	this->EV_A = EV_A;
441	}
442	#endif
443
444	base (EV_PX) throw ()
445	#if EV_MULTIPLICITY
446	: EV_A (EV_A)
447	#endif
448	{
449	ev_init (this, 0);
450	}
451
452	void set_ (const void data, void (cb)(EV_P_ ev_watcher *w, int revents)) throw ()
453	{
454	this->data = (void *)data;
455	ev_set_cb (static_cast<ev_watcher *>(this), cb);
456	}
457
458	// function callback
459	template<void (*function)(watcher &w, int)>
460	void set (void *data = 0) throw ()
461	{
462	set_ (data, function_thunk<function>);
463	}
464
465	template<void (*function)(watcher &w, int)>
466	static void function_thunk (EV_P_ ev_watcher *w, int revents)
467	{
468	function
469	(static_cast<watcher >(w), revents);
470	}
471
472	// method callback
473	template<class K, void (K::*method)(watcher &w, int)>
474	void set (K *object) throw ()
475	{
476	set_ (object, method_thunk<K, method>);
477	}
478
479	// default method == operator ()
480	template<class K>
481	void set (K *object) throw ()
482	{
483	set_ (object, method_thunk<K, &K::operator ()>);
484	}
485
486	template<class K, void (K::*method)(watcher &w, int)>
487	static void method_thunk (EV_P_ ev_watcher *w, int revents)
488	{
489	(static_cast<K >(w->data)->method)
490	(static_cast<watcher >(w), revents);
491	}
492
493	// no-argument callback
494	template<class K, void (K::*method)()>
495	void set (K *object) throw ()
496	{
497	set_ (object, method_noargs_thunk<K, method>);
498	}
499
500	template<class K, void (K::*method)()>
501	static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
502	{
503	(static_cast<K >(w->data)->method)
504	();
505	}
506
507	void operator ()(int events = EV_UNDEF)
508	{
509	return
510	ev_cb (static_cast<ev_watcher *>(this))
511	(static_cast<ev_watcher *>(this), events);
512	}
513
514	bool is_active () const throw ()
515	{
516	return ev_is_active (static_cast<const ev_watcher *>(this));
517	}
518
519	bool is_pending () const throw ()
520	{
521	return ev_is_pending (static_cast<const ev_watcher *>(this));
522	}
523
524	void feed_event (int revents) throw ()
525	{
526	ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
527	}
528	};
529
530	inline tstamp now () throw ()
531	{
532	return ev_time ();
533	}
534
535	inline void delay (tstamp interval) throw ()
536	{
537	ev_sleep (interval);
538	}
539
540	inline int version_major () throw ()
541	{
542	return ev_version_major ();
543	}
544
545	inline int version_minor () throw ()
546	{
547	return ev_version_minor ();
548	}
549
550	inline unsigned int supported_backends () throw ()
551	{
552	return ev_supported_backends ();
553	}
554
555	inline unsigned int recommended_backends () throw ()
556	{
557	return ev_recommended_backends ();
558	}
559
560	inline unsigned int embeddable_backends () throw ()
561	{
562	return ev_embeddable_backends ();
563	}
564
565	inline void set_allocator (void (cb)(void *ptr, long size)) throw ()
566	{
567	ev_set_allocator (cb);
568	}
569
570	inline void set_syserr_cb (void (cb)(const char msg)) throw ()
571	{
572	ev_set_syserr_cb (cb);
573	}
574
575	#if EV_MULTIPLICITY
576	#define EV_CONSTRUCT(cppstem,cstem) \
577	(EV_PX = get_default_loop ()) throw () \
578	: base<ev_ ## cstem, cppstem> (EV_A) \
579	{ \
580	}
581	#else
582	#define EV_CONSTRUCT(cppstem,cstem) \
583	() throw () \
584	{ \
585	}
586	#endif
587
588	/* using a template here would require quite a bit more lines,
589	* so a macro solution was chosen */
590	#define EV_BEGIN_WATCHER(cppstem,cstem) \
591	\
592	struct cppstem : base<ev_ ## cstem, cppstem> \
593	{ \
594	void start () throw () \
595	{ \
596	ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
597	} \
598	\
599	void stop () throw () \
600	{ \
601	ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
602	} \
603	\
604	cppstem EV_CONSTRUCT(cppstem,cstem) \
605	\
606	~cppstem () throw () \
607	{ \
608	stop (); \
609	} \
610	\
611	using base<ev_ ## cstem, cppstem>::set; \
612	\
613	private: \
614	\
615	cppstem (const cppstem &o); \
616	\
617	cppstem &operator =(const cppstem &o); \
618	\
619	public:
620
621	#define EV_END_WATCHER(cppstem,cstem) \
622	};
623
624	EV_BEGIN_WATCHER (io, io)
625	void set (int fd, int events) throw ()
626	{
627	int active = is_active ();
628	if (active) stop ();
629	ev_io_set (static_cast<ev_io *>(this), fd, events);
630	if (active) start ();
631	}
632
633	void set (int events) throw ()
634	{
635	int active = is_active ();
636	if (active) stop ();
637	ev_io_set (static_cast<ev_io *>(this), fd, events);
638	if (active) start ();
639	}
640
641	void start (int fd, int events) throw ()
642	{
643	set (fd, events);
644	start ();
645	}
646	EV_END_WATCHER (io, io)
647
648	EV_BEGIN_WATCHER (timer, timer)
649	void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
650	{
651	int active = is_active ();
652	if (active) stop ();
653	ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
654	if (active) start ();
655	}
656
657	void start (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
658	{
659	set (after, repeat);
660	start ();
661	}
662
663	void again () throw ()
664	{
665	ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
666	}
667
668	ev_tstamp remaining ()
669	{
670	return ev_timer_remaining (EV_A_ static_cast<ev_timer *>(this));
671	}
672	EV_END_WATCHER (timer, timer)
673
674	#if EV_PERIODIC_ENABLE
675	EV_BEGIN_WATCHER (periodic, periodic)
676	void set (ev_tstamp at, ev_tstamp interval = 0.) throw ()
677	{
678	int active = is_active ();
679	if (active) stop ();
680	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
681	if (active) start ();
682	}
683
684	void start (ev_tstamp at, ev_tstamp interval = 0.) throw ()
685	{
686	set (at, interval);
687	start ();
688	}
689
690	void again () throw ()
691	{
692	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
693	}
694	EV_END_WATCHER (periodic, periodic)
695	#endif
696
697	#if EV_SIGNAL_ENABLE
698	EV_BEGIN_WATCHER (sig, signal)
699	void set (int signum) throw ()
700	{
701	int active = is_active ();
702	if (active) stop ();
703	ev_signal_set (static_cast<ev_signal *>(this), signum);
704	if (active) start ();
705	}
706
707	void start (int signum) throw ()
708	{
709	set (signum);
710	start ();
711	}
712	EV_END_WATCHER (sig, signal)
713	#endif
714
715	#if EV_CHILD_ENABLE
716	EV_BEGIN_WATCHER (child, child)
717	void set (int pid, int trace = 0) throw ()
718	{
719	int active = is_active ();
720	if (active) stop ();
721	ev_child_set (static_cast<ev_child *>(this), pid, trace);
722	if (active) start ();
723	}
724
725	void start (int pid, int trace = 0) throw ()
726	{
727	set (pid, trace);
728	start ();
729	}
730	EV_END_WATCHER (child, child)
731	#endif
732
733	#if EV_STAT_ENABLE
734	EV_BEGIN_WATCHER (stat, stat)
735	void set (const char *path, ev_tstamp interval = 0.) throw ()
736	{
737	int active = is_active ();
738	if (active) stop ();
739	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
740	if (active) start ();
741	}
742
743	void start (const char *path, ev_tstamp interval = 0.) throw ()
744	{
745	stop ();
746	set (path, interval);
747	start ();
748	}
749
750	void update () throw ()
751	{
752	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
753	}
754	EV_END_WATCHER (stat, stat)
755	#endif
756
757	#if EV_IDLE_ENABLE
758	EV_BEGIN_WATCHER (idle, idle)
759	void set () throw () { }
760	EV_END_WATCHER (idle, idle)
761	#endif
762
763	#if EV_PREPARE_ENABLE
764	EV_BEGIN_WATCHER (prepare, prepare)
765	void set () throw () { }
766	EV_END_WATCHER (prepare, prepare)
767	#endif
768
769	#if EV_CHECK_ENABLE
770	EV_BEGIN_WATCHER (check, check)
771	void set () throw () { }
772	EV_END_WATCHER (check, check)
773	#endif
774
775	#if EV_EMBED_ENABLE
776	EV_BEGIN_WATCHER (embed, embed)
777	void set (struct ev_loop *embedded_loop) throw ()
778	{
779	int active = is_active ();
780	if (active) stop ();
781	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
782	if (active) start ();
783	}
784
785	void start (struct ev_loop *embedded_loop) throw ()
786	{
787	set (embedded_loop);
788	start ();
789	}
790
791	void sweep ()
792	{
793	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
794	}
795	EV_END_WATCHER (embed, embed)
796	#endif
797
798	#if EV_FORK_ENABLE
799	EV_BEGIN_WATCHER (fork, fork)
800	void set () throw () { }
801	EV_END_WATCHER (fork, fork)
802	#endif
803
804	#if EV_ASYNC_ENABLE
805	EV_BEGIN_WATCHER (async, async)
806	void send () throw ()
807	{
808	ev_async_send (EV_A_ static_cast<ev_async *>(this));
809	}
810
811	bool async_pending () throw ()
812	{
813	return ev_async_pending (static_cast<ev_async *>(this));
814	}
815	EV_END_WATCHER (async, async)
816	#endif
817
818	#undef EV_PX
819	#undef EV_PX_
820	#undef EV_CONSTRUCT
821	#undef EV_BEGIN_WATCHER
822	#undef EV_END_WATCHER
823	}
824
825	#endif
826