libev/ev%2B%2B.h

/*
 * libev simple C++ wrapper classes
 *
 * Copyright (c) 2007 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_CXX_EXCEPTIONS
#define EV_CXX_EXCEPTIONS 1
#endif

#undef EV_THROW
#if EV_CXX_EXCEPTIONS
#  include <stdexcept>
#  define EV_THROW(exception) throw (exception)
#else
#  define EV_THROW(exception)
#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,
    EMBED    = EV_EMBED,
    ERROR    = EV_ERROR,
  };

  enum
  {
    AUTO = EVFLAG_AUTO,
    NOENV = EVFLAG_NOENV,
    FORKCHECK = EVFLAG_FORKCHECK,
    SELECT = EVBACKEND_SELECT,
    POLL = EVBACKEND_POLL,
    EPOLL = EVBACKEND_EPOLL,
    KQUEUE = EVBACKEND_KQUEUE,
    DEVPOLL = EVBACKEND_DEVPOLL,
    PORT = EVBACKEND_PORT
  };

  enum
  {
    NONBLOCK = EVLOOP_NONBLOCK,
    ONESHOT = EVLOOP_ONESHOT
  };

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

#if EV_CXX_EXCEPTIONS
  struct bad_loop: std::runtime_error
  {
    bad_loop()
      : std::runtime_error("loop can't be initialized") {}
  };
#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)
#if EV_MULTIPLICITY
      EV_THROW (bad_loop) : EV_AX (EV_A)
#endif
    {
#if EV_MULTIPLICIY && EV_CXX_EXCEPTIONS
      if (!EV_A)
        throw bad_loop ();
#endif
    }

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

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

#if EV_MULTIPLICITY
    bool operator== (struct ev_loop *other) const EV_THROW ()
    {
      return this->EV_AX == other;
    }

    bool operator!= (struct ev_loop *other) const EV_THROW ()
    {
      return ! (*this == other);
    }

    bool operator== (const struct ev_loop *other) const EV_THROW ()
    {
      return this->EV_AX == other;
    }

    bool operator!= (const struct ev_loop *other) const EV_THROW ()
    {
      return (*this == other);
    }

    operator struct ev_loop * () const EV_THROW ()
    {
      return EV_AX;
    }

    operator const struct ev_loop * () const EV_THROW ()
    {
      return EV_AX;
    }

    bool is_default () const EV_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) EV_THROW ()
    {
      ev_unloop (EV_AX_ how);
    }

    void post_fork () EV_THROW ()
    {
#if EV_MULTIPLICITY
      ev_loop_fork (EV_AX);
#else
      ev_default_fork ();
#endif
    }

    unsigned int count () const EV_THROW ()
    {
      return ev_loop_count (EV_AX);
    }

    unsigned int backend () const EV_THROW ()
    {
      return ev_backend (EV_AX);
    }

    tstamp now () const EV_THROW ()
    {
      return ev_now (EV_AX);
    }

    void ref () EV_THROW ()
    {
      ev_ref (EV_AX);
    }

    void unref () EV_THROW ()
    {
      ev_unref (EV_AX);
    }

    void set_io_collect_interval (tstamp interval) EV_THROW ()
    {
      ev_set_io_collect_interval (EV_AX_ interval);
    }

    void set_timeout_collect_interval (tstamp interval) EV_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) EV_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) EV_THROW ()
    {
      once (fd, events, timeout, method_thunk<K, method>, object);
    }

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

    // const method callback
    template<class K, void (K::*method)(int) const>
    void once (int fd, int events, tstamp timeout, const K *object) EV_THROW ()
    {
      once (fd, events, timeout, const_method_thunk<K, method>, object);
    }

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

    // simple method callback
    template<class K, void (K::*method)()>
    void once (int fd, int events, tstamp timeout, K *object) EV_THROW ()
    {
      once (fd, events, timeout, method_noargs_thunk<K, method>, object);
    }

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

    // simpler function callback
    template<void (*cb)(int)>
    void once (int fd, int events, tstamp timeout) EV_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) EV_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) EV_THROW ()
    {
      ev_feed_fd_event (EV_AX_ fd, revents);
    }

    void feed_signal_event (int signum) EV_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) EV_THROW (bad_loop)
      : loop_ref (ev_loop_new (flags))
    {
    }

    ~dynamic_loop () EV_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) EV_THROW (bad_loop)
#if EV_MULTIPLICITY
      : loop_ref (ev_default_loop (flags))
    {
    }
#else
    {
    #if EV_CXX_EXCEPTIONS
      int r =
    #endif
          ev_default_loop (flags);
    #if EV_CXX_EXCEPTIONS
      if (!r)
        throw bad_loop ();
    #endif
    }
#endif

    ~default_loop () EV_THROW ()
    {
      ev_default_destroy ();
#if EV_MULTIPLICITY
      EV_AX = 0;
#endif
    }

  private:

    default_loop (const default_loop &);

    default_loop & operator= (const default_loop &);

  };

  inline loop_ref get_default_loop () EV_THROW ()
  {
#if EV_MULTIPLICITY
    return ev_default_loop (0);
#else
    return loop_ref ();
#endif
  }

#undef EV_AX
#undef EV_AX_

#undef EV_PX
#undef EV_PX_
#if EV_MULTIPLICITY
#  define EV_PX  loop_ref EV_A
#  define EV_PX_ loop_ref EV_A_
#else
#  define EV_PX
#  define EV_PX_
#endif

  template<class ev_watcher, class watcher>
  struct base : ev_watcher
  {
    #if EV_MULTIPLICITY
      EV_PX;

      void set (EV_PX) EV_THROW ()
      {
        this->EV_A = EV_A;
      }
    #endif

    base (EV_PX) EV_THROW ()
    #if EV_MULTIPLICITY
      : EV_A (EV_A)
    #endif
    {
      ev_init (this, 0);
    }

    void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) EV_THROW ()
    {
      this->data = data;
      ev_set_cb (static_cast<ev_watcher *>(this), cb);
    }

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

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

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

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

    // function callback
    template<void (*function)(watcher &w, int)>
    void set (void *data = 0) EV_THROW ()
    {
      set_ (data, function_thunk<function>);
    }

    template<void (*function)(watcher &w, int)>
    static void function_thunk (EV_P_ ev_watcher *w, int revents)
    {
      function (*static_cast<watcher *>(w), revents);
    }

    // simple callback
    template<class K, void (K::*method)()>
    void set (K *object) EV_THROW ()
    {
      set_ (object, method_noargs_thunk<K, method>);
    }

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

    void operator ()(int events = EV_UNDEF)
    {
      return ev_cb (static_cast<ev_watcher *>(this))
        (static_cast<ev_watcher *>(this), events);
    }

    bool is_active () const EV_THROW ()
    {
      return ev_is_active (static_cast<const ev_watcher *>(this));
    }

    bool is_pending () const EV_THROW ()
    {
      return ev_is_pending (static_cast<const ev_watcher *>(this));
    }

    void feed_event (int revents) EV_THROW ()
    {
      ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
    }
  };

  inline tstamp now () EV_THROW ()
  {
    return ev_time ();
  }

  inline void delay (tstamp interval) EV_THROW ()
  {
    ev_sleep (interval);
  }

  inline int version_major () EV_THROW ()
  {
    return ev_version_major ();
  }

  inline int version_minor () EV_THROW ()
  {
    return ev_version_minor ();
  }

  inline unsigned int supported_backends () EV_THROW ()
  {
    return ev_supported_backends ();
  }

  inline unsigned int recommended_backends () EV_THROW ()
  {
    return ev_recommended_backends ();
  }

  inline unsigned int embeddable_backends () EV_THROW ()
  {
    return ev_embeddable_backends ();
  }

  inline void set_allocator (void *(*cb)(void *ptr, long size)) EV_THROW ()
  {
    ev_set_allocator (cb);
  }

  inline void set_syserr_cb (void (*cb)(const char *msg)) EV_THROW ()
  {
    ev_set_syserr_cb (cb);
  }

  #if EV_MULTIPLICITY
    #define EV_CONSTRUCT(cppstem,cstem)                                                 \
      (EV_PX = get_default_loop ()) EV_THROW ()                                         \
        : base<ev_ ## cstem, cppstem> (EV_A)                                            \
      {                                                                                 \
      }
  #else
    #define EV_CONSTRUCT(cppstem,cstem)                                                 \
      () EV_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 () EV_THROW ()                                                           \
    {                                                                                   \
      ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this));                 \
    }                                                                                   \
                                                                                        \
    void stop () EV_THROW ()                                                            \
    {                                                                                   \
      ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this));                  \
    }                                                                                   \
                                                                                        \
    cppstem EV_CONSTRUCT(cppstem,cstem)                                                 \
                                                                                        \
    ~cppstem () EV_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) EV_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) EV_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) EV_THROW ()
    {
      set (fd, events);
      start ();
    }
  EV_END_WATCHER (io, io)

  EV_BEGIN_WATCHER (timer, timer)
    void set (ev_tstamp after, ev_tstamp repeat = 0.) EV_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.) EV_THROW ()
    {
      set (after, repeat);
      start ();
    }

    void again () EV_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.) EV_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.) EV_THROW ()
    {
      set (at, interval);
      start ();
    }

    void again () EV_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) EV_THROW ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_signal_set (static_cast<ev_signal *>(this), signum);
      if (active) start ();
    }

    void start (int signum) EV_THROW ()
    {
      set (signum);
      start ();
    }
  EV_END_WATCHER (sig, signal)

  EV_BEGIN_WATCHER (child, child)
    void set (int pid) EV_THROW ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_child_set (static_cast<ev_child *>(this), pid);
      if (active) start ();
    }

    void start (int pid) EV_THROW ()
    {
      set (pid);
      start ();
    }
  EV_END_WATCHER (child, child)

  #if EV_STAT_ENABLE
  EV_BEGIN_WATCHER (stat, stat)
    void set (const char *path, ev_tstamp interval = 0.) EV_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.) EV_THROW ()
    {
      stop ();
      set (path, interval);
      start ();
    }

    void update () EV_THROW ()
    {
      ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
    }
  EV_END_WATCHER (stat, stat)
  #endif

  EV_BEGIN_WATCHER (idle, idle)
    void set () EV_THROW () { }
  EV_END_WATCHER (idle, idle)

  EV_BEGIN_WATCHER (prepare, prepare)
    void set () EV_THROW () { }
  EV_END_WATCHER (prepare, prepare)

  EV_BEGIN_WATCHER (check, check)
    void set () EV_THROW () { }
  EV_END_WATCHER (check, check)

  #if EV_EMBED_ENABLE
  EV_BEGIN_WATCHER (embed, embed)
    void start (struct ev_loop *embedded_loop) EV_THROW ()
    {
      stop ();
      ev_embed_set (static_cast<ev_embed *>(this), 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 () EV_THROW () { }
  EV_END_WATCHER (fork, fork)
  #endif

  #undef EV_PX
  #undef EV_PX_
  #undef EV_CONSTRUCT
  #undef EV_BEGIN_WATCHER
  #undef EV_END_WATCHER

}

#undef EV_THROW

#endif

Revision:	1.30
Committed:	Fri Jan 18 18:15:35 2008 UTC (16 years, 3 months ago) by llucax
Content type:	text/plain
Branch:	MAIN
Changes since 1.29:	+111 -78 lines
Log Message:	Add exceptions support to C++ interface. Add exception specification and a ev::bad_loop exception that is thrown when a loop can't be initialized.
#	Content
1	/*
2	* libev simple C++ wrapper classes
3	*
4	* Copyright (c) 2007 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_CXX_EXCEPTIONS
50	#define EV_CXX_EXCEPTIONS 1
51	#endif
52
53	#undef EV_THROW
54	#if EV_CXX_EXCEPTIONS
55	# include <stdexcept>
56	# define EV_THROW(exception) throw (exception)
57	#else
58	# define EV_THROW(exception)
59	#endif
60
61	namespace ev {
62
63	typedef ev_tstamp tstamp;
64
65	enum {
66	UNDEF = EV_UNDEF,
67	NONE = EV_NONE,
68	READ = EV_READ,
69	WRITE = EV_WRITE,
70	TIMEOUT = EV_TIMEOUT,
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	EMBED = EV_EMBED,
80	ERROR = EV_ERROR,
81	};
82
83	enum
84	{
85	AUTO = EVFLAG_AUTO,
86	NOENV = EVFLAG_NOENV,
87	FORKCHECK = EVFLAG_FORKCHECK,
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	#if EV_CXX_EXCEPTIONS
109	struct bad_loop: std::runtime_error
110	{
111	bad_loop()
112	: std::runtime_error("loop can't be initialized") {}
113	};
114	#endif
115
116	#ifdef EV_AX
117	# undef EV_AX
118	#endif
119
120	#ifdef EV_AX_
121	# undef EV_AX_
122	#endif
123
124	#if EV_MULTIPLICITY
125	# define EV_AX raw_loop
126	# define EV_AX_ raw_loop,
127	#else
128	# define EV_AX
129	# define EV_AX_
130	#endif
131
132	struct loop_ref
133	{
134
135	loop_ref (EV_P)
136	#if EV_MULTIPLICITY
137	EV_THROW (bad_loop) : EV_AX (EV_A)
138	#endif
139	{
140	#if EV_MULTIPLICIY && EV_CXX_EXCEPTIONS
141	if (!EV_A)
142	throw bad_loop ();
143	#endif
144	}
145
146	bool operator== (const loop_ref &other) const EV_THROW ()
147	{
148	#if EV_MULTIPLICITY
149	return this->EV_AX == other.EV_AX;
150	#else
151	return true;
152	#endif
153	}
154
155	bool operator!= (const loop_ref &other) const EV_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== (struct ev_loop *other) const EV_THROW ()
166	{
167	return this->EV_AX == other;
168	}
169
170	bool operator!= (struct ev_loop *other) const EV_THROW ()
171	{
172	return ! (*this == other);
173	}
174
175	bool operator== (const struct ev_loop *other) const EV_THROW ()
176	{
177	return this->EV_AX == other;
178	}
179
180	bool operator!= (const struct ev_loop *other) const EV_THROW ()
181	{
182	return (*this == other);
183	}
184
185	operator struct ev_loop * () const EV_THROW ()
186	{
187	return EV_AX;
188	}
189
190	operator const struct ev_loop * () const EV_THROW ()
191	{
192	return EV_AX;
193	}
194
195	bool is_default () const EV_THROW ()
196	{
197	return EV_AX == ev_default_loop (0);
198	}
199	#endif
200
201	void loop (int flags = 0)
202	{
203	ev_loop (EV_AX_ flags);
204	}
205
206	void unloop (how_t how = ONE) EV_THROW ()
207	{
208	ev_unloop (EV_AX_ how);
209	}
210
211	void post_fork () EV_THROW ()
212	{
213	#if EV_MULTIPLICITY
214	ev_loop_fork (EV_AX);
215	#else
216	ev_default_fork ();
217	#endif
218	}
219
220	unsigned int count () const EV_THROW ()
221	{
222	return ev_loop_count (EV_AX);
223	}
224
225	unsigned int backend () const EV_THROW ()
226	{
227	return ev_backend (EV_AX);
228	}
229
230	tstamp now () const EV_THROW ()
231	{
232	return ev_now (EV_AX);
233	}
234
235	void ref () EV_THROW ()
236	{
237	ev_ref (EV_AX);
238	}
239
240	void unref () EV_THROW ()
241	{
242	ev_unref (EV_AX);
243	}
244
245	void set_io_collect_interval (tstamp interval) EV_THROW ()
246	{
247	ev_set_io_collect_interval (EV_AX_ interval);
248	}
249
250	void set_timeout_collect_interval (tstamp interval) EV_THROW ()
251	{
252	ev_set_timeout_collect_interval (EV_AX_ interval);
253	}
254
255	// function callback
256	void once (int fd, int events, tstamp timeout, void (cb)(int, void ), void* arg = 0) EV_THROW ()
257	{
258	ev_once (EV_AX_ fd, events, timeout, cb, arg);
259	}
260
261	// method callback
262	template<class K, void (K::*method)(int)>
263	void once (int fd, int events, tstamp timeout, K *object) EV_THROW ()
264	{
265	once (fd, events, timeout, method_thunk<K, method>, object);
266	}
267
268	template<class K, void (K::*method)(int)>
269	static void method_thunk (int revents, void* arg)
270	{
271	K obj = static_cast<K >(arg);
272	(obj->*method) (revents);
273	}
274
275	// const method callback
276	template<class K, void (K::*method)(int) const>
277	void once (int fd, int events, tstamp timeout, const K *object) EV_THROW ()
278	{
279	once (fd, events, timeout, const_method_thunk<K, method>, object);
280	}
281
282	template<class K, void (K::*method)(int) const>
283	static void const_method_thunk (int revents, void* arg)
284	{
285	K obj = static_cast<K >(arg);
286	(obj->*method) (revents);
287	}
288
289	// simple method callback
290	template<class K, void (K::*method)()>
291	void once (int fd, int events, tstamp timeout, K *object) EV_THROW ()
292	{
293	once (fd, events, timeout, method_noargs_thunk<K, method>, object);
294	}
295
296	template<class K, void (K::*method)()>
297	static void method_noargs_thunk (int revents, void* arg)
298	{
299	K obj = static_cast<K >(arg);
300	(obj->*method) ();
301	}
302
303	// simpler function callback
304	template<void (*cb)(int)>
305	void once (int fd, int events, tstamp timeout) EV_THROW ()
306	{
307	once (fd, events, timeout, simpler_func_thunk<cb>);
308	}
309
310	template<void (*cb)(int)>
311	static void simpler_func_thunk (int revents, void* arg)
312	{
313	(*cb) (revents);
314	}
315
316	// simplest function callback
317	template<void (*cb)()>
318	void once (int fd, int events, tstamp timeout) EV_THROW ()
319	{
320	once (fd, events, timeout, simplest_func_thunk<cb>);
321	}
322
323	template<void (*cb)()>
324	static void simplest_func_thunk (int revents, void* arg)
325	{
326	(*cb) ();
327	}
328
329	void feed_fd_event (int fd, int revents) EV_THROW ()
330	{
331	ev_feed_fd_event (EV_AX_ fd, revents);
332	}
333
334	void feed_signal_event (int signum) EV_THROW ()
335	{
336	ev_feed_signal_event (EV_AX_ signum);
337	}
338
339	#if EV_MULTIPLICITY
340	struct ev_loop* EV_AX;
341	#endif
342
343	};
344
345	#if EV_MULTIPLICITY
346	struct dynamic_loop: loop_ref
347	{
348
349	dynamic_loop (unsigned int flags = AUTO) EV_THROW (bad_loop)
350	: loop_ref (ev_loop_new (flags))
351	{
352	}
353
354	~dynamic_loop () EV_THROW ()
355	{
356	ev_loop_destroy (EV_AX);
357	EV_AX = 0;
358	}
359
360	private:
361
362	dynamic_loop (const dynamic_loop &);
363
364	dynamic_loop & operator= (const dynamic_loop &);
365
366	};
367	#endif
368
369	struct default_loop: loop_ref
370	{
371
372	default_loop (unsigned int flags = AUTO) EV_THROW (bad_loop)
373	#if EV_MULTIPLICITY
374	: loop_ref (ev_default_loop (flags))
375	{
376	}
377	#else
378	{
379	#if EV_CXX_EXCEPTIONS
380	int r =
381	#endif
382	ev_default_loop (flags);
383	#if EV_CXX_EXCEPTIONS
384	if (!r)
385	throw bad_loop ();
386	#endif
387	}
388	#endif
389
390	~default_loop () EV_THROW ()
391	{
392	ev_default_destroy ();
393	#if EV_MULTIPLICITY
394	EV_AX = 0;
395	#endif
396	}
397
398	private:
399
400	default_loop (const default_loop &);
401
402	default_loop & operator= (const default_loop &);
403
404	};
405
406	inline loop_ref get_default_loop () EV_THROW ()
407	{
408	#if EV_MULTIPLICITY
409	return ev_default_loop (0);
410	#else
411	return loop_ref ();
412	#endif
413	}
414
415	#undef EV_AX
416	#undef EV_AX_
417
418	#undef EV_PX
419	#undef EV_PX_
420	#if EV_MULTIPLICITY
421	# define EV_PX loop_ref EV_A
422	# define EV_PX_ loop_ref EV_A_
423	#else
424	# define EV_PX
425	# define EV_PX_
426	#endif
427
428	template<class ev_watcher, class watcher>
429	struct base : ev_watcher
430	{
431	#if EV_MULTIPLICITY
432	EV_PX;
433
434	void set (EV_PX) EV_THROW ()
435	{
436	this->EV_A = EV_A;
437	}
438	#endif
439
440	base (EV_PX) EV_THROW ()
441	#if EV_MULTIPLICITY
442	: EV_A (EV_A)
443	#endif
444	{
445	ev_init (this, 0);
446	}
447
448	void set_ (void data, void (cb)(EV_P_ ev_watcher *w, int revents)) EV_THROW ()
449	{
450	this->data = data;
451	ev_set_cb (static_cast<ev_watcher *>(this), cb);
452	}
453
454	// method callback
455	template<class K, void (K::*method)(watcher &w, int)>
456	void set (K *object) EV_THROW ()
457	{
458	set_ (object, method_thunk<K, method>);
459	}
460
461	template<class K, void (K::*method)(watcher &w, int)>
462	static void method_thunk (EV_P_ ev_watcher *w, int revents)
463	{
464	K obj = static_cast<K >(w->data);
465	(obj->method) (static_cast<watcher *>(w), revents);
466	}
467
468	// const method callback
469	template<class K, void (K::*method)(watcher &w, int) const>
470	void set (const K *object) EV_THROW ()
471	{
472	set_ (object, const_method_thunk<K, method>);
473	}
474
475	template<class K, void (K::*method)(watcher &w, int) const>
476	static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
477	{
478	K obj = static_cast<K >(w->data);
479	(static_cast<K >(w->data)->method) (static_cast<watcher >(w), revents);
480	}
481
482	// function callback
483	template<void (*function)(watcher &w, int)>
484	void set (void *data = 0) EV_THROW ()
485	{
486	set_ (data, function_thunk<function>);
487	}
488
489	template<void (*function)(watcher &w, int)>
490	static void function_thunk (EV_P_ ev_watcher *w, int revents)
491	{
492	function (static_cast<watcher >(w), revents);
493	}
494
495	// simple callback
496	template<class K, void (K::*method)()>
497	void set (K *object) EV_THROW ()
498	{
499	set_ (object, method_noargs_thunk<K, method>);
500	}
501
502	template<class K, void (K::*method)()>
503	static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
504	{
505	K obj = static_cast<K >(w->data);
506	(obj->*method) ();
507	}
508
509	void operator ()(int events = EV_UNDEF)
510	{
511	return ev_cb (static_cast<ev_watcher *>(this))
512	(static_cast<ev_watcher *>(this), events);
513	}
514
515	bool is_active () const EV_THROW ()
516	{
517	return ev_is_active (static_cast<const ev_watcher *>(this));
518	}
519
520	bool is_pending () const EV_THROW ()
521	{
522	return ev_is_pending (static_cast<const ev_watcher *>(this));
523	}
524
525	void feed_event (int revents) EV_THROW ()
526	{
527	ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
528	}
529	};
530
531	inline tstamp now () EV_THROW ()
532	{
533	return ev_time ();
534	}
535
536	inline void delay (tstamp interval) EV_THROW ()
537	{
538	ev_sleep (interval);
539	}
540
541	inline int version_major () EV_THROW ()
542	{
543	return ev_version_major ();
544	}
545
546	inline int version_minor () EV_THROW ()
547	{
548	return ev_version_minor ();
549	}
550
551	inline unsigned int supported_backends () EV_THROW ()
552	{
553	return ev_supported_backends ();
554	}
555
556	inline unsigned int recommended_backends () EV_THROW ()
557	{
558	return ev_recommended_backends ();
559	}
560
561	inline unsigned int embeddable_backends () EV_THROW ()
562	{
563	return ev_embeddable_backends ();
564	}
565
566	inline void set_allocator (void (cb)(void *ptr, long size)) EV_THROW ()
567	{
568	ev_set_allocator (cb);
569	}
570
571	inline void set_syserr_cb (void (cb)(const char msg)) EV_THROW ()
572	{
573	ev_set_syserr_cb (cb);
574	}
575
576	#if EV_MULTIPLICITY
577	#define EV_CONSTRUCT(cppstem,cstem) \
578	(EV_PX = get_default_loop ()) EV_THROW () \
579	: base<ev_ ## cstem, cppstem> (EV_A) \
580	{ \
581	}
582	#else
583	#define EV_CONSTRUCT(cppstem,cstem) \
584	() EV_THROW () \
585	{ \
586	}
587	#endif
588
589	/* using a template here would require quite a bit more lines,
590	* so a macro solution was chosen */
591	#define EV_BEGIN_WATCHER(cppstem,cstem) \
592	\
593	struct cppstem : base<ev_ ## cstem, cppstem> \
594	{ \
595	void start () EV_THROW () \
596	{ \
597	ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
598	} \
599	\
600	void stop () EV_THROW () \
601	{ \
602	ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
603	} \
604	\
605	cppstem EV_CONSTRUCT(cppstem,cstem) \
606	\
607	~cppstem () EV_THROW () \
608	{ \
609	stop (); \
610	} \
611	\
612	using base<ev_ ## cstem, cppstem>::set; \
613	\
614	private: \
615	\
616	cppstem (const cppstem &o); \
617	\
618	cppstem & operator =(const cppstem &o); \
619	\
620	public:
621
622	#define EV_END_WATCHER(cppstem,cstem) \
623	};
624
625	EV_BEGIN_WATCHER (io, io)
626	void set (int fd, int events) EV_THROW ()
627	{
628	int active = is_active ();
629	if (active) stop ();
630	ev_io_set (static_cast<ev_io *>(this), fd, events);
631	if (active) start ();
632	}
633
634	void set (int events) EV_THROW ()
635	{
636	int active = is_active ();
637	if (active) stop ();
638	ev_io_set (static_cast<ev_io *>(this), fd, events);
639	if (active) start ();
640	}
641
642	void start (int fd, int events) EV_THROW ()
643	{
644	set (fd, events);
645	start ();
646	}
647	EV_END_WATCHER (io, io)
648
649	EV_BEGIN_WATCHER (timer, timer)
650	void set (ev_tstamp after, ev_tstamp repeat = 0.) EV_THROW ()
651	{
652	int active = is_active ();
653	if (active) stop ();
654	ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
655	if (active) start ();
656	}
657
658	void start (ev_tstamp after, ev_tstamp repeat = 0.) EV_THROW ()
659	{
660	set (after, repeat);
661	start ();
662	}
663
664	void again () EV_THROW ()
665	{
666	ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
667	}
668	EV_END_WATCHER (timer, timer)
669
670	#if EV_PERIODIC_ENABLE
671	EV_BEGIN_WATCHER (periodic, periodic)
672	void set (ev_tstamp at, ev_tstamp interval = 0.) EV_THROW ()
673	{
674	int active = is_active ();
675	if (active) stop ();
676	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
677	if (active) start ();
678	}
679
680	void start (ev_tstamp at, ev_tstamp interval = 0.) EV_THROW ()
681	{
682	set (at, interval);
683	start ();
684	}
685
686	void again () EV_THROW ()
687	{
688	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
689	}
690	EV_END_WATCHER (periodic, periodic)
691	#endif
692
693	EV_BEGIN_WATCHER (sig, signal)
694	void set (int signum) EV_THROW ()
695	{
696	int active = is_active ();
697	if (active) stop ();
698	ev_signal_set (static_cast<ev_signal *>(this), signum);
699	if (active) start ();
700	}
701
702	void start (int signum) EV_THROW ()
703	{
704	set (signum);
705	start ();
706	}
707	EV_END_WATCHER (sig, signal)
708
709	EV_BEGIN_WATCHER (child, child)
710	void set (int pid) EV_THROW ()
711	{
712	int active = is_active ();
713	if (active) stop ();
714	ev_child_set (static_cast<ev_child *>(this), pid);
715	if (active) start ();
716	}
717
718	void start (int pid) EV_THROW ()
719	{
720	set (pid);
721	start ();
722	}
723	EV_END_WATCHER (child, child)
724
725	#if EV_STAT_ENABLE
726	EV_BEGIN_WATCHER (stat, stat)
727	void set (const char *path, ev_tstamp interval = 0.) EV_THROW ()
728	{
729	int active = is_active ();
730	if (active) stop ();
731	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
732	if (active) start ();
733	}
734
735	void start (const char *path, ev_tstamp interval = 0.) EV_THROW ()
736	{
737	stop ();
738	set (path, interval);
739	start ();
740	}
741
742	void update () EV_THROW ()
743	{
744	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
745	}
746	EV_END_WATCHER (stat, stat)
747	#endif
748
749	EV_BEGIN_WATCHER (idle, idle)
750	void set () EV_THROW () { }
751	EV_END_WATCHER (idle, idle)
752
753	EV_BEGIN_WATCHER (prepare, prepare)
754	void set () EV_THROW () { }
755	EV_END_WATCHER (prepare, prepare)
756
757	EV_BEGIN_WATCHER (check, check)
758	void set () EV_THROW () { }
759	EV_END_WATCHER (check, check)
760
761	#if EV_EMBED_ENABLE
762	EV_BEGIN_WATCHER (embed, embed)
763	void start (struct ev_loop *embedded_loop) EV_THROW ()
764	{
765	stop ();
766	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
767	start ();
768	}
769
770	void sweep ()
771	{
772	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
773	}
774	EV_END_WATCHER (embed, embed)
775	#endif
776
777	#if EV_FORK_ENABLE
778	EV_BEGIN_WATCHER (fork, fork)
779	void set () EV_THROW () { }
780	EV_END_WATCHER (fork, fork)
781	#endif
782
783	#undef EV_PX
784	#undef EV_PX_
785	#undef EV_CONSTRUCT
786	#undef EV_BEGIN_WATCHER
787	#undef EV_END_WATCHER
788
789	}
790
791	#undef EV_THROW
792
793	#endif
794