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/* |
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* libev simple C++ wrapper classes |
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* |
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* Copyright (c) 2007 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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namespace ev { |
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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_P; |
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|
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void set (EV_P) |
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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 () |
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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_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) |
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{ |
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this->data = data; |
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ev_set_cb (static_cast<ev_watcher *>(this), cb); |
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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)> |
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void set (K *object) |
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{ |
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set_ (object, method_thunk<K, method>); |
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} |
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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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K *obj = static_cast<K *>(w->data); |
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(obj->*method) (*static_cast<watcher *>(w), revents); |
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} |
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|
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// const method callback |
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template<class K, void (K::*method)(watcher &w, int) const> |
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void set (const K *object) |
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{ |
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set_ (object, const_method_thunk<K, method>); |
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} |
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|
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template<class K, void (K::*method)(watcher &w, int) const> |
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static void const_method_thunk (EV_P_ ev_watcher *w, int revents) |
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{ |
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K *obj = static_cast<K *>(w->data); |
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(static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents); |
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} |
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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) |
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{ |
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set_ (data, function_thunk<function>); |
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} |
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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 (*static_cast<watcher *>(w), revents); |
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} |
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|
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// simple callback |
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template<class K, void (K::*method)()> |
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void set (K *object) |
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{ |
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set_ (object, method_noargs_thunk<K, method>); |
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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 (EV_P_ ev_watcher *w, int revents) |
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{ |
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K *obj = static_cast<K *>(w->data); |
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(obj->*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 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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|
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bool is_active () const |
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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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|
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bool is_pending () const |
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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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}; |
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|
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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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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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EMBED = EV_EMBED, |
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ERROR = EV_ERROR, |
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}; |
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|
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typedef ev_tstamp tstamp; |
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|
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inline ev_tstamp now (EV_P) |
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{ |
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return ev_now (EV_A); |
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} |
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|
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#if EV_MULTIPLICITY |
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#define EV_CONSTRUCT \ |
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(EV_P = EV_DEFAULT) \ |
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{ \ |
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set (EV_A); \ |
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} |
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#else |
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#define EV_CONSTRUCT \ |
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() \ |
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{ \ |
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} |
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#endif |
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|
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/* using a template here would require quite a bit 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 () \ |
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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 () \ |
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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 \ |
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\ |
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~cppstem () \ |
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{ \ |
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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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\ |
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cppstem (const cppstem &o) \ |
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{ /* disabled */ } \ |
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\ |
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void operator =(const cppstem &o) { /* disabled */ } \ |
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\ |
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public: |
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|
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#define EV_END_WATCHER(cppstem,cstem) \ |
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}; |
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|
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EV_BEGIN_WATCHER (io, io) |
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void set (int fd, int events) |
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{ |
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int active = is_active (); |
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if (active) stop (); |
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ev_io_set (static_cast<ev_io *>(this), fd, events); |
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if (active) start (); |
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} |
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|
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void set (int events) |
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{ |
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int active = is_active (); |
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if (active) stop (); |
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ev_io_set (static_cast<ev_io *>(this), fd, events); |
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if (active) start (); |
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} |
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|
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void start (int fd, int events) |
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{ |
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set (fd, events); |
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start (); |
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} |
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EV_END_WATCHER (io, io) |
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|
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EV_BEGIN_WATCHER (timer, timer) |
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void set (ev_tstamp after, ev_tstamp repeat = 0.) |
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{ |
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int active = is_active (); |
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if (active) stop (); |
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ev_timer_set (static_cast<ev_timer *>(this), after, repeat); |
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if (active) start (); |
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} |
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|
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void start (ev_tstamp after, ev_tstamp repeat = 0.) |
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{ |
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set (after, repeat); |
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start (); |
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} |
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|
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void again () |
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{ |
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ev_timer_again (EV_A_ static_cast<ev_timer *>(this)); |
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} |
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EV_END_WATCHER (timer, timer) |
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|
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#if EV_PERIODIC_ENABLE |
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EV_BEGIN_WATCHER (periodic, periodic) |
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void set (ev_tstamp at, ev_tstamp interval = 0.) |
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{ |
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int active = is_active (); |
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if (active) stop (); |
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ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0); |
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if (active) start (); |
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} |
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|
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void start (ev_tstamp at, ev_tstamp interval = 0.) |
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{ |
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set (at, interval); |
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start (); |
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} |
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|
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void again () |
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{ |
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ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this)); |
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} |
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EV_END_WATCHER (periodic, periodic) |
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#endif |
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|
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EV_BEGIN_WATCHER (sig, signal) |
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void set (int signum) |
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{ |
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int active = is_active (); |
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if (active) stop (); |
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ev_signal_set (static_cast<ev_signal *>(this), signum); |
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if (active) start (); |
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} |
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|
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void start (int signum) |
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{ |
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set (signum); |
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start (); |
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} |
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EV_END_WATCHER (sig, signal) |
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|
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EV_BEGIN_WATCHER (child, child) |
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void set (int pid) |
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{ |
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int active = is_active (); |
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if (active) stop (); |
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ev_child_set (static_cast<ev_child *>(this), pid); |
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if (active) start (); |
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} |
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|
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void start (int pid) |
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{ |
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set (pid); |
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start (); |
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} |
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EV_END_WATCHER (child, child) |
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|
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#if EV_STAT_ENABLE |
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EV_BEGIN_WATCHER (stat, stat) |
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void set (const char *path, ev_tstamp interval = 0.) |
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{ |
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int active = is_active (); |
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if (active) stop (); |
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ev_stat_set (static_cast<ev_stat *>(this), path, interval); |
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if (active) start (); |
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} |
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|
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void start (const char *path, ev_tstamp interval = 0.) |
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{ |
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stop (); |
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set (path, interval); |
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start (); |
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} |
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|
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void update () |
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{ |
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ev_stat_stat (EV_A_ static_cast<ev_stat *>(this)); |
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} |
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EV_END_WATCHER (stat, stat) |
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#endif |
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|
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EV_BEGIN_WATCHER (idle, idle) |
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void set () { } |
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EV_END_WATCHER (idle, idle) |
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|
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EV_BEGIN_WATCHER (prepare, prepare) |
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void set () { } |
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EV_END_WATCHER (prepare, prepare) |
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|
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EV_BEGIN_WATCHER (check, check) |
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void set () { } |
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EV_END_WATCHER (check, check) |
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|
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#if EV_EMBED_ENABLE |
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EV_BEGIN_WATCHER (embed, embed) |
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void start (struct ev_loop *embedded_loop) |
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{ |
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stop (); |
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ev_embed_set (static_cast<ev_embed *>(this), embedded_loop); |
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start (); |
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} |
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|
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void sweep () |
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{ |
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ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this)); |
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} |
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EV_END_WATCHER (embed, embed) |
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#endif |
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|
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#if EV_FORK_ENABLE |
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EV_BEGIN_WATCHER (fork, fork) |
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void set () { } |
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EV_END_WATCHER (fork, fork) |
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#endif |
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|
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#undef EV_CONSTRUCT |
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#undef EV_BEGIN_WATCHER |
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#undef EV_END_WATCHER |
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} |
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|
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#endif |
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|
