Mirror of :pserver:anonymous@cvs.schmorp.de/schmorpforge libev http://software.schmorp.de/pkg/libev.html
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#ifndef EVPP_H__
#define EVPP_H__
#include "ev.h"
namespace ev {
template<class watcher>
class callback
{
struct klass; // it is vital that this is never defined
klass *o;
void (klass::*m)(watcher &, int);
public:
template<class O1, class O2>
explicit callback (O1 *object, void (O2::*method)(watcher &, int))
{
o = reinterpret_cast<klass *>(object);
m = reinterpret_cast<void (klass::*)(watcher &, int)>(method);
}
// this works because a standards-compliant C++ compiler
// basically can't help it: it doesn't have the knowledge
// required to miscompile (klass is not defined anywhere
// and nothing is known about the constructor arguments) :)
void call (watcher *w, int revents)
{
(o->*m) (*w, revents);
}
};
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(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_BEGIN_WATCHER(cppstem,cstem) \
\
struct cppstem : ev_ ## cstem, callback<cppstem> \
{ \
EV_CONSTRUCT (cppstem) \
{ \
ev_init (static_cast<ev_ ## cstem *>(this), thunk); \
} \
\
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); \
} \
\
~cppstem () \
{ \
stop (); \
} \
\
private: \
\
cppstem (const cppstem &o) \
: callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \
{ /* disabled */ } \
\
void operator =(const cppstem &o) { /* disabled */ } \
\
static void thunk (EV_P_ struct ev_ ## cstem *w, int revents) \
{ \
(*static_cast<cppstem *>(w))(revents); \
} \
\
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.)
{
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 set (struct ev_loop *loop)
{
int active = is_active ();
if (active) stop ();
ev_embed_set (static_cast<ev_embed *>(this), loop);
if (active) start ();
}
void start (struct ev_loop *embedded_loop)
{
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 () { }
EV_END_WATCHER (fork, fork)
#endif
#undef EV_CONSTRUCT
#undef EV_BEGIN_WATCHER
#undef EV_END_WATCHER
}
#endif