Mirror of :pserver:anonymous@cvs.schmorp.de/schmorpforge libev http://software.schmorp.de/pkg/libev.html
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/*
* libev simple C++ wrapper classes
*
* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modifica-
* tion, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Alternatively, the contents of this file may be used under the terms of
* the GNU General Public License ("GPL") version 2 or any later version,
* in which case the provisions of the GPL are applicable instead of
* the above. If you wish to allow the use of your version of this file
* only under the terms of the GPL and not to allow others to use your
* version of this file under the BSD license, indicate your decision
* by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete the
* provisions above, a recipient may use your version of this file under
* either the BSD or the GPL.
*/
#ifndef EVPP_H__
#define EVPP_H__
#ifdef EV_H
# include EV_H
#else
# include "ev.h"
#endif
namespace ev {
template<class ev_watcher, class watcher>
struct base : ev_watcher
{
#if EV_MULTIPLICITY
EV_P;
void set (EV_P)
{
this->EV_A = EV_A;
}
#endif
base ()
{
ev_init (this, 0);
}
void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents))
{
this->data = data;
ev_set_cb (static_cast<ev_watcher *>(this), cb);
}
// method callback
template<class K, void (K::*method)(watcher &w, int)>
void set (K *object)
{
set_ (object, method_thunk<K, method>);
}
template<class K, void (K::*method)(watcher &w, int)>
static void method_thunk (EV_P_ ev_watcher *w, int revents)
{
K *obj = static_cast<K *>(w->data);
(obj->*method) (*static_cast<watcher *>(w), revents);
}
// const method callback
template<class K, void (K::*method)(watcher &w, int) const>
void set (const K *object)
{
set_ (object, const_method_thunk<K, method>);
}
template<class K, void (K::*method)(watcher &w, int) const>
static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
{
K *obj = static_cast<K *>(w->data);
(static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents);
}
// function callback
template<void (*function)(watcher &w, int)>
void set (void *data = 0)
{
set_ (data, function_thunk<function>);
}
template<void (*function)(watcher &w, int)>
static void function_thunk (EV_P_ ev_watcher *w, int revents)
{
function (*static_cast<watcher *>(w), revents);
}
// simple callback
template<class K, void (K::*method)()>
void set (K *object)
{
set_ (object, method_noargs_thunk<K, method>);
}
template<class K, void (K::*method)()>
static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
{
K *obj = static_cast<K *>(w->data);
(obj->*method) ();
}
void operator ()(int events = EV_UNDEF)
{
return ev_cb (static_cast<ev_watcher *>(this))
(static_cast<ev_watcher *>(this), events);
}
bool is_active () const
{
return ev_is_active (static_cast<const ev_watcher *>(this));
}
bool is_pending () const
{
return ev_is_pending (static_cast<const ev_watcher *>(this));
}
};
enum {
UNDEF = EV_UNDEF,
NONE = EV_NONE,
READ = EV_READ,
WRITE = EV_WRITE,
TIMEOUT = EV_TIMEOUT,
PERIODIC = EV_PERIODIC,
SIGNAL = EV_SIGNAL,
CHILD = EV_CHILD,
STAT = EV_STAT,
IDLE = EV_IDLE,
CHECK = EV_CHECK,
PREPARE = EV_PREPARE,
FORK = EV_FORK,
EMBED = EV_EMBED,
ERROR = EV_ERROR,
};
typedef ev_tstamp tstamp;
inline ev_tstamp now (EV_P)
{
return ev_now (EV_A);
}
#if EV_MULTIPLICITY
#define EV_CONSTRUCT \
(EV_P = EV_DEFAULT) \
{ \
set (EV_A); \
}
#else
#define EV_CONSTRUCT \
() \
{ \
}
#endif
/* using a template here would require quite a bit more lines,
* so a macro solution was chosen */
#define EV_BEGIN_WATCHER(cppstem,cstem) \
\
struct cppstem : base<ev_ ## cstem, cppstem> \
{ \
void start () \
{ \
ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
} \
\
void stop () \
{ \
ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
} \
\
cppstem EV_CONSTRUCT \
\
~cppstem () \
{ \
stop (); \
} \
\
using base<ev_ ## cstem, cppstem>::set; \
\
private: \
\
cppstem (const cppstem &o) \
{ /* disabled */ } \
\
void operator =(const cppstem &o) { /* disabled */ } \
\
public:
#define EV_END_WATCHER(cppstem,cstem) \
};
EV_BEGIN_WATCHER (io, io)
void set (int fd, int events)
{
int active = is_active ();
if (active) stop ();
ev_io_set (static_cast<ev_io *>(this), fd, events);
if (active) start ();
}
void set (int events)
{
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)
{
set (fd, events);
start ();
}
EV_END_WATCHER (io, io)
EV_BEGIN_WATCHER (timer, timer)
void set (ev_tstamp after, ev_tstamp repeat = 0.)
{
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.)
{
set (after, repeat);
start ();
}
void again ()
{
ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
}
EV_END_WATCHER (timer, timer)
#if EV_PERIODIC_ENABLE
EV_BEGIN_WATCHER (periodic, periodic)
void set (ev_tstamp at, ev_tstamp interval = 0.)
{
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.)
{
set (at, interval);
start ();
}
void again ()
{
ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
}
EV_END_WATCHER (periodic, periodic)
#endif
EV_BEGIN_WATCHER (sig, signal)
void set (int signum)
{
int active = is_active ();
if (active) stop ();
ev_signal_set (static_cast<ev_signal *>(this), signum);
if (active) start ();
}
void start (int signum)
{
set (signum);
start ();
}
EV_END_WATCHER (sig, signal)
EV_BEGIN_WATCHER (child, child)
void set (int pid)
{
int active = is_active ();
if (active) stop ();
ev_child_set (static_cast<ev_child *>(this), pid);
if (active) start ();
}
void start (int pid)
{
set (pid);
start ();
}
EV_END_WATCHER (child, child)
#if EV_STAT_ENABLE
EV_BEGIN_WATCHER (stat, stat)
void set (const char *path, ev_tstamp interval = 0.)
{
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.)
{
stop ();
set (path, interval);
start ();
}
void update ()
{
ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
}
EV_END_WATCHER (stat, stat)
#endif
EV_BEGIN_WATCHER (idle, idle)
void set () { }
EV_END_WATCHER (idle, idle)
EV_BEGIN_WATCHER (prepare, prepare)
void set () { }
EV_END_WATCHER (prepare, prepare)
EV_BEGIN_WATCHER (check, check)
void set () { }
EV_END_WATCHER (check, check)
#if EV_EMBED_ENABLE
EV_BEGIN_WATCHER (embed, embed)
void start (struct ev_loop *embedded_loop)
{
stop ();
ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
start ();
}
void sweep ()
{
ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
}
EV_END_WATCHER (embed, embed)
#endif
#if EV_FORK_ENABLE
EV_BEGIN_WATCHER (fork, fork)
void set () { }
EV_END_WATCHER (fork, fork)
#endif
#undef EV_CONSTRUCT
#undef EV_BEGIN_WATCHER
#undef EV_END_WATCHER
}
#endif