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817 lines
20 KiB
C++
817 lines
20 KiB
C++
/*
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* libev simple C++ wrapper classes
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*
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* Copyright (c) 2007,2008,2010 Marc Alexander Lehmann <libev@schmorp.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modifica-
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* tion, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
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* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
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* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
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* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Alternatively, the contents of this file may be used under the terms of
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* the GNU General Public License ("GPL") version 2 or any later version,
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* in which case the provisions of the GPL are applicable instead of
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* the above. If you wish to allow the use of your version of this file
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* only under the terms of the GPL and not to allow others to use your
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* version of this file under the BSD license, indicate your decision
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* by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete the
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* provisions above, a recipient may use your version of this file under
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* either the BSD or the GPL.
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*/
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#ifndef EVPP_H__
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#define EVPP_H__
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#ifdef EV_H
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# include EV_H
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#else
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# include "ev.h"
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#endif
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#ifndef EV_USE_STDEXCEPT
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# define EV_USE_STDEXCEPT 1
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#endif
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#if EV_USE_STDEXCEPT
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# include <stdexcept>
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#endif
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namespace ev {
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typedef ev_tstamp tstamp;
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enum {
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UNDEF = EV_UNDEF,
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NONE = EV_NONE,
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READ = EV_READ,
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WRITE = EV_WRITE,
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#if EV_COMPAT3
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TIMEOUT = EV_TIMEOUT,
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#endif
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TIMER = EV_TIMER,
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PERIODIC = EV_PERIODIC,
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SIGNAL = EV_SIGNAL,
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CHILD = EV_CHILD,
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STAT = EV_STAT,
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IDLE = EV_IDLE,
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CHECK = EV_CHECK,
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PREPARE = EV_PREPARE,
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FORK = EV_FORK,
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ASYNC = EV_ASYNC,
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EMBED = EV_EMBED,
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# undef ERROR // some systems stupidly #define ERROR
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ERROR = EV_ERROR
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};
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enum
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{
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AUTO = EVFLAG_AUTO,
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NOENV = EVFLAG_NOENV,
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FORKCHECK = EVFLAG_FORKCHECK,
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SELECT = EVBACKEND_SELECT,
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POLL = EVBACKEND_POLL,
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EPOLL = EVBACKEND_EPOLL,
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KQUEUE = EVBACKEND_KQUEUE,
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DEVPOLL = EVBACKEND_DEVPOLL,
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PORT = EVBACKEND_PORT
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};
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enum
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{
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#if EV_COMPAT3
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NONBLOCK = EVLOOP_NONBLOCK,
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ONESHOT = EVLOOP_ONESHOT,
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#endif
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NOWAIT = EVRUN_NOWAIT,
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ONCE = EVRUN_ONCE
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};
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enum how_t
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{
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ONE = EVBREAK_ONE,
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ALL = EVBREAK_ALL
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};
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struct bad_loop
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#if EV_USE_STDEXCEPT
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: std::runtime_error
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#endif
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{
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#if EV_USE_STDEXCEPT
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bad_loop ()
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: std::runtime_error ("libev event loop cannot be initialized, bad value of LIBEV_FLAGS?")
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{
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}
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#endif
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};
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#ifdef EV_AX
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# undef EV_AX
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#endif
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#ifdef EV_AX_
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# undef EV_AX_
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#endif
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#if EV_MULTIPLICITY
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# define EV_AX raw_loop
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# define EV_AX_ raw_loop,
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#else
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# define EV_AX
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# define EV_AX_
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#endif
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struct loop_ref
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{
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loop_ref (EV_P) throw ()
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#if EV_MULTIPLICITY
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: EV_AX (EV_A)
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#endif
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{
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}
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bool operator == (const loop_ref &other) const throw ()
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{
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#if EV_MULTIPLICITY
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return EV_AX == other.EV_AX;
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#else
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return true;
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#endif
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}
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bool operator != (const loop_ref &other) const throw ()
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{
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#if EV_MULTIPLICITY
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return ! (*this == other);
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#else
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return false;
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#endif
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}
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#if EV_MULTIPLICITY
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bool operator == (const EV_P) const throw ()
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{
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return this->EV_AX == EV_A;
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}
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bool operator != (const EV_P) const throw ()
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{
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return (*this == EV_A);
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}
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operator struct ev_loop * () const throw ()
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{
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return EV_AX;
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}
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operator const struct ev_loop * () const throw ()
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{
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return EV_AX;
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}
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bool is_default () const throw ()
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{
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return EV_AX == ev_default_loop (0);
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}
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#endif
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#if EV_COMPAT3
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void loop (int flags = 0)
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{
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ev_run (EV_AX_ flags);
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}
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void unloop (how_t how = ONE) throw ()
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{
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ev_break (EV_AX_ how);
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}
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#endif
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void run (int flags = 0)
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{
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ev_run (EV_AX_ flags);
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}
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void break_loop (how_t how = ONE) throw ()
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{
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ev_break (EV_AX_ how);
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}
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void post_fork () throw ()
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{
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ev_loop_fork (EV_AX);
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}
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unsigned int backend () const throw ()
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{
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return ev_backend (EV_AX);
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}
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tstamp now () const throw ()
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{
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return ev_now (EV_AX);
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}
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void ref () throw ()
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{
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ev_ref (EV_AX);
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}
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void unref () throw ()
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{
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ev_unref (EV_AX);
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}
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#if EV_FEATURE_API
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unsigned int iteration () const throw ()
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{
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return ev_iteration (EV_AX);
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}
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unsigned int depth () const throw ()
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{
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return ev_depth (EV_AX);
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}
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void set_io_collect_interval (tstamp interval) throw ()
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{
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ev_set_io_collect_interval (EV_AX_ interval);
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}
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void set_timeout_collect_interval (tstamp interval) throw ()
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{
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ev_set_timeout_collect_interval (EV_AX_ interval);
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}
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#endif
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// function callback
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void once (int fd, int events, tstamp timeout, void (*cb)(int, void *), void *arg = 0) throw ()
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{
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ev_once (EV_AX_ fd, events, timeout, cb, arg);
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}
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// method callback
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template<class K, void (K::*method)(int)>
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void once (int fd, int events, tstamp timeout, K *object) throw ()
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{
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once (fd, events, timeout, method_thunk<K, method>, object);
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}
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// default method == operator ()
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template<class K>
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void once (int fd, int events, tstamp timeout, K *object) throw ()
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{
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once (fd, events, timeout, method_thunk<K, &K::operator ()>, object);
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}
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template<class K, void (K::*method)(int)>
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static void method_thunk (int revents, void *arg)
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{
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(static_cast<K *>(arg)->*method)
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(revents);
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}
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// no-argument method callback
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template<class K, void (K::*method)()>
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void once (int fd, int events, tstamp timeout, K *object) throw ()
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{
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once (fd, events, timeout, method_noargs_thunk<K, method>, object);
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}
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template<class K, void (K::*method)()>
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static void method_noargs_thunk (int revents, void *arg)
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{
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(static_cast<K *>(arg)->*method)
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();
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}
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// simpler function callback
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template<void (*cb)(int)>
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void once (int fd, int events, tstamp timeout) throw ()
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{
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once (fd, events, timeout, simpler_func_thunk<cb>);
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}
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template<void (*cb)(int)>
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static void simpler_func_thunk (int revents, void *arg)
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{
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(*cb)
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(revents);
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}
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// simplest function callback
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template<void (*cb)()>
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void once (int fd, int events, tstamp timeout) throw ()
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{
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once (fd, events, timeout, simplest_func_thunk<cb>);
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}
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template<void (*cb)()>
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static void simplest_func_thunk (int revents, void *arg)
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{
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(*cb)
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();
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}
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void feed_fd_event (int fd, int revents) throw ()
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{
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ev_feed_fd_event (EV_AX_ fd, revents);
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}
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void feed_signal_event (int signum) throw ()
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{
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ev_feed_signal_event (EV_AX_ signum);
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}
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#if EV_MULTIPLICITY
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struct ev_loop* EV_AX;
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#endif
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};
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#if EV_MULTIPLICITY
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struct dynamic_loop : loop_ref
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{
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dynamic_loop (unsigned int flags = AUTO) throw (bad_loop)
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: loop_ref (ev_loop_new (flags))
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{
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if (!EV_AX)
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throw bad_loop ();
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}
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~dynamic_loop () throw ()
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{
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ev_loop_destroy (EV_AX);
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EV_AX = 0;
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}
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private:
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dynamic_loop (const dynamic_loop &);
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dynamic_loop & operator= (const dynamic_loop &);
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};
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#endif
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struct default_loop : loop_ref
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{
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default_loop (unsigned int flags = AUTO) throw (bad_loop)
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#if EV_MULTIPLICITY
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: loop_ref (ev_default_loop (flags))
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#endif
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{
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if (
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#if EV_MULTIPLICITY
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!EV_AX
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#else
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!ev_default_loop (flags)
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#endif
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)
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throw bad_loop ();
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}
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private:
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default_loop (const default_loop &);
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default_loop &operator = (const default_loop &);
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};
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inline loop_ref get_default_loop () throw ()
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{
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#if EV_MULTIPLICITY
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return ev_default_loop (0);
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#else
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return loop_ref ();
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#endif
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}
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#undef EV_AX
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#undef EV_AX_
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#undef EV_PX
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#undef EV_PX_
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#if EV_MULTIPLICITY
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# define EV_PX loop_ref EV_A
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# define EV_PX_ loop_ref EV_A_
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#else
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# define EV_PX
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# define EV_PX_
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#endif
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template<class ev_watcher, class watcher>
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struct base : ev_watcher
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{
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#if EV_MULTIPLICITY
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EV_PX;
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// loop set
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void set (EV_P) throw ()
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{
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this->EV_A = EV_A;
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}
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#endif
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base (EV_PX) throw ()
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#if EV_MULTIPLICITY
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: EV_A (EV_A)
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#endif
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{
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ev_init (this, 0);
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}
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void set_ (const void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) throw ()
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{
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this->data = (void *)data;
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ev_set_cb (static_cast<ev_watcher *>(this), cb);
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}
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// function callback
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template<void (*function)(watcher &w, int)>
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void set (void *data = 0) throw ()
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{
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set_ (data, function_thunk<function>);
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}
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template<void (*function)(watcher &w, int)>
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static void function_thunk (EV_P_ ev_watcher *w, int revents)
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{
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function
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(*static_cast<watcher *>(w), revents);
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}
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// method callback
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template<class K, void (K::*method)(watcher &w, int)>
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void set (K *object) throw ()
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{
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set_ (object, method_thunk<K, method>);
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}
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// default method == operator ()
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template<class K>
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void set (K *object) throw ()
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{
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set_ (object, method_thunk<K, &K::operator ()>);
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}
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template<class K, void (K::*method)(watcher &w, int)>
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static void method_thunk (EV_P_ ev_watcher *w, int revents)
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{
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(static_cast<K *>(w->data)->*method)
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(*static_cast<watcher *>(w), revents);
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}
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// no-argument callback
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template<class K, void (K::*method)()>
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void set (K *object) throw ()
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{
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set_ (object, method_noargs_thunk<K, method>);
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}
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template<class K, void (K::*method)()>
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static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
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{
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(static_cast<K *>(w->data)->*method)
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();
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}
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void operator ()(int events = EV_UNDEF)
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{
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return
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ev_cb (static_cast<ev_watcher *>(this))
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(static_cast<ev_watcher *>(this), events);
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}
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bool is_active () const throw ()
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{
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return ev_is_active (static_cast<const ev_watcher *>(this));
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}
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bool is_pending () const throw ()
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{
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return ev_is_pending (static_cast<const ev_watcher *>(this));
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}
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void feed_event (int revents) throw ()
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{
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ev_feed_event (EV_A_ static_cast<ev_watcher *>(this), revents);
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}
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};
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inline tstamp now (EV_P) throw ()
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{
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return ev_now (EV_A);
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}
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inline void delay (tstamp interval) throw ()
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{
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ev_sleep (interval);
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}
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inline int version_major () throw ()
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{
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return ev_version_major ();
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}
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inline int version_minor () throw ()
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{
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return ev_version_minor ();
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}
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inline unsigned int supported_backends () throw ()
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{
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return ev_supported_backends ();
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}
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inline unsigned int recommended_backends () throw ()
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{
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return ev_recommended_backends ();
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}
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inline unsigned int embeddable_backends () throw ()
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{
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return ev_embeddable_backends ();
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}
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inline void set_allocator (void *(*cb)(void *ptr, long size) throw ()) throw ()
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{
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ev_set_allocator (cb);
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}
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inline void set_syserr_cb (void (*cb)(const char *msg) throw ()) throw ()
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{
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ev_set_syserr_cb (cb);
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}
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#if EV_MULTIPLICITY
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#define EV_CONSTRUCT(cppstem,cstem) \
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(EV_PX = get_default_loop ()) throw () \
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: base<ev_ ## cstem, cppstem> (EV_A) \
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{ \
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}
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#else
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#define EV_CONSTRUCT(cppstem,cstem) \
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() throw () \
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{ \
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}
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#endif
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/* using a template here would require quite a few more lines,
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* so a macro solution was chosen */
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#define EV_BEGIN_WATCHER(cppstem,cstem) \
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\
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struct cppstem : base<ev_ ## cstem, cppstem> \
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{ \
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void start () throw () \
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{ \
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ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
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} \
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\
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void stop () throw () \
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{ \
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ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
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} \
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\
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cppstem EV_CONSTRUCT(cppstem,cstem) \
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|
\
|
|
~cppstem () throw () \
|
|
{ \
|
|
stop (); \
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|
} \
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|
\
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|
using base<ev_ ## cstem, cppstem>::set; \
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\
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|
private: \
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|
\
|
|
cppstem (const cppstem &o); \
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|
\
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|
cppstem &operator =(const cppstem &o); \
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|
\
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|
public:
|
|
|
|
#define EV_END_WATCHER(cppstem,cstem) \
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|
};
|
|
|
|
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_embed (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
|
|
|