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first rough cut at c++ interface

master
Marc Alexander Lehmann 2007-11-10 21:19:29 +00:00
parent 84f0098987
commit b07765847b
3 changed files with 257 additions and 0 deletions
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15
ev++.C Normal file
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#include "ev++.h"
namespace ev {
extern "C" {
void cb_io (struct ev_io *w, int revents) { (*static_cast<io *>(w))(revents); }
void cb_timer (struct ev_timer *w, int revents) { (*static_cast<timer *>(w))(revents); }
void cb_periodic (struct ev_periodic *w, int revents) { (*static_cast<periodic *>(w))(revents); }
void cb_idle (struct ev_idle *w, int revents) { (*static_cast<idle *>(w))(revents); }
void cb_prepare (struct ev_prepare *w, int revents) { (*static_cast<prepare *>(w))(revents); }
void cb_check (struct ev_check *w, int revents) { (*static_cast<check *>(w))(revents); }
void cb_sig (struct ev_signal *w, int revents) { (*static_cast<sig *>(w))(revents); }
void cb_child (struct ev_child *w, int revents) { (*static_cast<child *>(w))(revents); }
}
}

238
ev++.h Normal file
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#ifndef EVPP_H__
#define EVPP_H__
/* work in progress, don't use unless you know what you are doing */
namespace ev {
template<class watcher>
class callback
{
struct object { };
void *obj;
void (object::*meth)(watcher &, int);
/* a proxy is a kind of recipe on how to call a specific class method */
struct proxy_base {
virtual void call (void *obj, void (object::*meth)(watcher &, int), watcher &w, int) const = 0;
};
template<class O1, class O2>
struct proxy : proxy_base {
virtual void call (void *obj, void (object::*meth)(watcher &, int), watcher &w, int e) const
{
((reinterpret_cast<O1 *>(obj)) ->* (reinterpret_cast<void (O2::*)(watcher &, int)>(meth)))
(w, e);
}
};
proxy_base *prxy;
public:
template<class O1, class O2>
explicit callback (O1 *object, void (O2::*method)(watcher &, int))
{
static proxy<O1,O2> p;
obj = reinterpret_cast<void *>(object);
meth = reinterpret_cast<void (object::*)(watcher &, int)>(method);
prxy = &p;
}
void call (watcher *w, int e) const
{
return prxy->call (obj, meth, *w, e);
}
};
#include "ev.h"
typedef ev_tstamp tstamp;
inline ev_tstamp now (EV_P)
{
return ev_now (EV_A);
}
#if EV_MULTIPLICITY
#define EV_CONSTRUCT(cppstem) \
EV_P; \
\
void set (EV_P) \
{ \
this->EV_A = EV_A; \
} \
\
template<class O1, class O2> \
explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int), EV_P = ev_default_loop (0)) \
: callback<cppstem> (object, method), EV_A (EV_A)
#else
#define EV_CONSTRUCT(cppstem) \
template<class O1, class O2> \
explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int)) \
: callback<cppstem> (object, method)
#endif
/* using a template here would require quite a bit more lines,
* so a macro solution was chosen */
#define EV_DECLARE_WATCHER(cppstem,cstem) \
\
extern "C" void cb_ ## cppstem (struct ev_ ## cstem *w, int revents); \
\
struct cppstem : ev_ ## cstem, callback<cppstem> \
{ \
EV_CONSTRUCT (cppstem) \
{ \
ev_init (static_cast<ev_ ## cstem *>(this), cb_ ## cppstem); \
} \
\
bool is_active () const \
{ \
return ev_is_active (static_cast<const ev_ ## cstem *>(this)); \
} \
\
bool is_pending () const \
{ \
return ev_is_pending (static_cast<const ev_ ## cstem *>(this)); \
} \
\
void start () \
{ \
ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
} \
\
void stop () \
{ \
ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
} \
\
void operator ()(int events = EV_UNDEF) \
{ \
return call (this, events); \
} \
\
private: \
\
cppstem (const cppstem &o) \
: callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \
{ /* disabled */ } \
void operator =(const cppstem &o) { /* disabled */ } \
\
public:
EV_DECLARE_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_DECLARE_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_DECLARE_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_DECLARE_WATCHER (idle, idle)
};
EV_DECLARE_WATCHER (prepare, prepare)
};
EV_DECLARE_WATCHER (check, check)
};
EV_DECLARE_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_DECLARE_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 ();
}
};
#undef EV_CONSTRUCT
#undef EV_DECLARE_WATCHER
}
#endif

4
ev.h
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@ -55,11 +55,15 @@ struct ev_loop;
# define EV_P_ EV_P,
# define EV_A loop
# define EV_A_ EV_A,
# define EV_DEFAULT_A ev_default_loop (0)
# define EV_DEFAULT_A_ EV_DEFAULT_A,
#else
# define EV_P void
# define EV_P_
# define EV_A
# define EV_A_
# define EV_DEFAULT_A
# define EV_DEFAULT_A_
#endif
/* eventmask, revents, events... */