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/* |
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* libev simple C++ wrapper classes |
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* |
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* Copyright (c) 2007,2008 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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|
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#ifndef EVPP_H__ |
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#define EVPP_H__ |
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|
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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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|
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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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|
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#if EV_USE_STDEXCEPT |
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# include <stdexcept> |
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#endif |
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|
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namespace ev { |
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|
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typedef ev_tstamp tstamp; |
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|
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enum |
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{ |
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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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TIMEOUT = EV_TIMEOUT, |
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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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|
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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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|
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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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|
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enum |
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{ |
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NONBLOCK = EVLOOP_NONBLOCK, |
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ONESHOT = EVLOOP_ONESHOT |
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}; |
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|
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enum how_t |
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{ |
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ONE = EVUNLOOP_ONE, |
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ALL = EVUNLOOP_ALL |
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}; |
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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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|
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#ifdef EV_AX |
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# undef EV_AX |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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void loop (int flags = 0) |
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{ |
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ev_loop (EV_AX_ flags); |
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} |
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|
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void unloop (how_t how = ONE) throw () |
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{ |
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ev_unloop (EV_AX_ how); |
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} |
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|
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void post_fork () throw () |
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{ |
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#if EV_MULTIPLICITY |
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ev_loop_fork (EV_AX); |
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#else |
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ev_default_fork (); |
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#endif |
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} |
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|
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unsigned int count () const throw () |
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{ |
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return ev_loop_count (EV_AX); |
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} |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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}; |
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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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|
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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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|
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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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|
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private: |
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|
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dynamic_loop (const dynamic_loop &); |
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|
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dynamic_loop & operator= (const dynamic_loop &); |
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|
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}; |
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#endif |
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|
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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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|
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~default_loop () throw () |
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{ |
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ev_default_destroy (); |
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} |
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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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|
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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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|
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#undef EV_AX |
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#undef EV_AX_ |
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|
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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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|
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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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|
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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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|
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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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|
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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); |
429 |
} |
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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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} |
437 |
|
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template<void (*function)(watcher &w, int)> |
439 |
static void function_thunk (EV_P_ ev_watcher *w, int revents) |
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{ |
441 |
function |
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(*static_cast<watcher *>(w), revents); |
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} |
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|
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// method callback |
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template<class K, void (K::*method)(watcher &w, int)> |
447 |
void set (K *object) throw () |
448 |
{ |
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set_ (object, method_thunk<K, method>); |
450 |
} |
451 |
|
452 |
// default method == operator () |
453 |
template<class K> |
454 |
void set (K *object) throw () |
455 |
{ |
456 |
set_ (object, method_thunk<K, &K::operator ()>); |
457 |
} |
458 |
|
459 |
template<class K, void (K::*method)(watcher &w, int)> |
460 |
static void method_thunk (EV_P_ ev_watcher *w, int revents) |
461 |
{ |
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(static_cast<K *>(w->data)->*method) |
463 |
(*static_cast<watcher *>(w), revents); |
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} |
465 |
|
466 |
// no-argument callback |
467 |
template<class K, void (K::*method)()> |
468 |
void set (K *object) throw () |
469 |
{ |
470 |
set_ (object, method_noargs_thunk<K, method>); |
471 |
} |
472 |
|
473 |
template<class K, void (K::*method)()> |
474 |
static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents) |
475 |
{ |
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static_cast<K *>(w->data)->*method |
477 |
(); |
478 |
} |
479 |
|
480 |
void operator ()(int events = EV_UNDEF) |
481 |
{ |
482 |
return |
483 |
ev_cb (static_cast<ev_watcher *>(this)) |
484 |
(static_cast<ev_watcher *>(this), events); |
485 |
} |
486 |
|
487 |
bool is_active () const throw () |
488 |
{ |
489 |
return ev_is_active (static_cast<const ev_watcher *>(this)); |
490 |
} |
491 |
|
492 |
bool is_pending () const throw () |
493 |
{ |
494 |
return ev_is_pending (static_cast<const ev_watcher *>(this)); |
495 |
} |
496 |
|
497 |
void feed_event (int revents) throw () |
498 |
{ |
499 |
ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents); |
500 |
} |
501 |
}; |
502 |
|
503 |
inline tstamp now () throw () |
504 |
{ |
505 |
return ev_time (); |
506 |
} |
507 |
|
508 |
inline void delay (tstamp interval) throw () |
509 |
{ |
510 |
ev_sleep (interval); |
511 |
} |
512 |
|
513 |
inline int version_major () throw () |
514 |
{ |
515 |
return ev_version_major (); |
516 |
} |
517 |
|
518 |
inline int version_minor () throw () |
519 |
{ |
520 |
return ev_version_minor (); |
521 |
} |
522 |
|
523 |
inline unsigned int supported_backends () throw () |
524 |
{ |
525 |
return ev_supported_backends (); |
526 |
} |
527 |
|
528 |
inline unsigned int recommended_backends () throw () |
529 |
{ |
530 |
return ev_recommended_backends (); |
531 |
} |
532 |
|
533 |
inline unsigned int embeddable_backends () throw () |
534 |
{ |
535 |
return ev_embeddable_backends (); |
536 |
} |
537 |
|
538 |
inline void set_allocator (void *(*cb)(void *ptr, long size)) throw () |
539 |
{ |
540 |
ev_set_allocator (cb); |
541 |
} |
542 |
|
543 |
inline void set_syserr_cb (void (*cb)(const char *msg)) throw () |
544 |
{ |
545 |
ev_set_syserr_cb (cb); |
546 |
} |
547 |
|
548 |
#if EV_MULTIPLICITY |
549 |
#define EV_CONSTRUCT(cppstem,cstem) \ |
550 |
(EV_PX = get_default_loop ()) throw () \ |
551 |
: base<ev_ ## cstem, cppstem> (EV_A) \ |
552 |
{ \ |
553 |
} |
554 |
#else |
555 |
#define EV_CONSTRUCT(cppstem,cstem) \ |
556 |
() throw () \ |
557 |
{ \ |
558 |
} |
559 |
#endif |
560 |
|
561 |
/* using a template here would require quite a bit more lines, |
562 |
* so a macro solution was chosen */ |
563 |
#define EV_BEGIN_WATCHER(cppstem,cstem) \ |
564 |
\ |
565 |
struct cppstem : base<ev_ ## cstem, cppstem> \ |
566 |
{ \ |
567 |
void start () throw () \ |
568 |
{ \ |
569 |
ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
570 |
} \ |
571 |
\ |
572 |
void stop () throw () \ |
573 |
{ \ |
574 |
ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
575 |
} \ |
576 |
\ |
577 |
cppstem EV_CONSTRUCT(cppstem,cstem) \ |
578 |
\ |
579 |
~cppstem () throw () \ |
580 |
{ \ |
581 |
stop (); \ |
582 |
} \ |
583 |
\ |
584 |
using base<ev_ ## cstem, cppstem>::set; \ |
585 |
\ |
586 |
private: \ |
587 |
\ |
588 |
cppstem (const cppstem &o); \ |
589 |
\ |
590 |
cppstem &operator =(const cppstem &o); \ |
591 |
\ |
592 |
public: |
593 |
|
594 |
#define EV_END_WATCHER(cppstem,cstem) \ |
595 |
}; |
596 |
|
597 |
EV_BEGIN_WATCHER (io, io) |
598 |
void set (int fd, int events) throw () |
599 |
{ |
600 |
int active = is_active (); |
601 |
if (active) stop (); |
602 |
ev_io_set (static_cast<ev_io *>(this), fd, events); |
603 |
if (active) start (); |
604 |
} |
605 |
|
606 |
void set (int events) throw () |
607 |
{ |
608 |
int active = is_active (); |
609 |
if (active) stop (); |
610 |
ev_io_set (static_cast<ev_io *>(this), fd, events); |
611 |
if (active) start (); |
612 |
} |
613 |
|
614 |
void start (int fd, int events) throw () |
615 |
{ |
616 |
set (fd, events); |
617 |
start (); |
618 |
} |
619 |
EV_END_WATCHER (io, io) |
620 |
|
621 |
EV_BEGIN_WATCHER (timer, timer) |
622 |
void set (ev_tstamp after, ev_tstamp repeat = 0.) throw () |
623 |
{ |
624 |
int active = is_active (); |
625 |
if (active) stop (); |
626 |
ev_timer_set (static_cast<ev_timer *>(this), after, repeat); |
627 |
if (active) start (); |
628 |
} |
629 |
|
630 |
void start (ev_tstamp after, ev_tstamp repeat = 0.) throw () |
631 |
{ |
632 |
set (after, repeat); |
633 |
start (); |
634 |
} |
635 |
|
636 |
void again () throw () |
637 |
{ |
638 |
ev_timer_again (EV_A_ static_cast<ev_timer *>(this)); |
639 |
} |
640 |
EV_END_WATCHER (timer, timer) |
641 |
|
642 |
#if EV_PERIODIC_ENABLE |
643 |
EV_BEGIN_WATCHER (periodic, periodic) |
644 |
void set (ev_tstamp at, ev_tstamp interval = 0.) throw () |
645 |
{ |
646 |
int active = is_active (); |
647 |
if (active) stop (); |
648 |
ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0); |
649 |
if (active) start (); |
650 |
} |
651 |
|
652 |
void start (ev_tstamp at, ev_tstamp interval = 0.) throw () |
653 |
{ |
654 |
set (at, interval); |
655 |
start (); |
656 |
} |
657 |
|
658 |
void again () throw () |
659 |
{ |
660 |
ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this)); |
661 |
} |
662 |
EV_END_WATCHER (periodic, periodic) |
663 |
#endif |
664 |
|
665 |
EV_BEGIN_WATCHER (sig, signal) |
666 |
void set (int signum) throw () |
667 |
{ |
668 |
int active = is_active (); |
669 |
if (active) stop (); |
670 |
ev_signal_set (static_cast<ev_signal *>(this), signum); |
671 |
if (active) start (); |
672 |
} |
673 |
|
674 |
void start (int signum) throw () |
675 |
{ |
676 |
set (signum); |
677 |
start (); |
678 |
} |
679 |
EV_END_WATCHER (sig, signal) |
680 |
|
681 |
EV_BEGIN_WATCHER (child, child) |
682 |
void set (int pid, int trace = 0) throw () |
683 |
{ |
684 |
int active = is_active (); |
685 |
if (active) stop (); |
686 |
ev_child_set (static_cast<ev_child *>(this), pid, trace); |
687 |
if (active) start (); |
688 |
} |
689 |
|
690 |
void start (int pid, int trace = 0) throw () |
691 |
{ |
692 |
set (pid, trace); |
693 |
start (); |
694 |
} |
695 |
EV_END_WATCHER (child, child) |
696 |
|
697 |
#if EV_STAT_ENABLE |
698 |
EV_BEGIN_WATCHER (stat, stat) |
699 |
void set (const char *path, ev_tstamp interval = 0.) throw () |
700 |
{ |
701 |
int active = is_active (); |
702 |
if (active) stop (); |
703 |
ev_stat_set (static_cast<ev_stat *>(this), path, interval); |
704 |
if (active) start (); |
705 |
} |
706 |
|
707 |
void start (const char *path, ev_tstamp interval = 0.) throw () |
708 |
{ |
709 |
stop (); |
710 |
set (path, interval); |
711 |
start (); |
712 |
} |
713 |
|
714 |
void update () throw () |
715 |
{ |
716 |
ev_stat_stat (EV_A_ static_cast<ev_stat *>(this)); |
717 |
} |
718 |
EV_END_WATCHER (stat, stat) |
719 |
#endif |
720 |
|
721 |
EV_BEGIN_WATCHER (idle, idle) |
722 |
void set () throw () { } |
723 |
EV_END_WATCHER (idle, idle) |
724 |
|
725 |
EV_BEGIN_WATCHER (prepare, prepare) |
726 |
void set () throw () { } |
727 |
EV_END_WATCHER (prepare, prepare) |
728 |
|
729 |
EV_BEGIN_WATCHER (check, check) |
730 |
void set () throw () { } |
731 |
EV_END_WATCHER (check, check) |
732 |
|
733 |
#if EV_EMBED_ENABLE |
734 |
EV_BEGIN_WATCHER (embed, embed) |
735 |
void set (struct ev_loop *embedded_loop) throw () |
736 |
{ |
737 |
int active = is_active (); |
738 |
if (active) stop (); |
739 |
ev_embed_set (static_cast<ev_embed *>(this), embedded_loop); |
740 |
if (active) start (); |
741 |
} |
742 |
|
743 |
void start (struct ev_loop *embedded_loop) throw () |
744 |
{ |
745 |
set (embedded_loop); |
746 |
start (); |
747 |
} |
748 |
|
749 |
void sweep () |
750 |
{ |
751 |
ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this)); |
752 |
} |
753 |
EV_END_WATCHER (embed, embed) |
754 |
#endif |
755 |
|
756 |
#if EV_FORK_ENABLE |
757 |
EV_BEGIN_WATCHER (fork, fork) |
758 |
void set () throw () { } |
759 |
EV_END_WATCHER (fork, fork) |
760 |
#endif |
761 |
|
762 |
#if EV_ASYNC_ENABLE |
763 |
EV_BEGIN_WATCHER (async, async) |
764 |
void set () throw () { } |
765 |
|
766 |
void send () throw () |
767 |
{ |
768 |
ev_async_send (EV_A_ static_cast<ev_async *>(this)); |
769 |
} |
770 |
|
771 |
bool async_pending () throw () |
772 |
{ |
773 |
return ev_async_pending (static_cast<ev_async *>(this)); |
774 |
} |
775 |
EV_END_WATCHER (async, async) |
776 |
#endif |
777 |
|
778 |
#undef EV_PX |
779 |
#undef EV_PX_ |
780 |
#undef EV_CONSTRUCT |
781 |
#undef EV_BEGIN_WATCHER |
782 |
#undef EV_END_WATCHER |
783 |
} |
784 |
|
785 |
#endif |
786 |
|