#ifndef EVPP_H__
#define EVPP_H__
-/* work in progress, don't use unless you know what you are doing */
+#include "ev.h"
namespace ev {
template<class watcher>
class callback
{
- struct object { };
+ struct klass; // it is vital that this is never defined
- 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;
+ klass *o;
+ void (klass::*m)(watcher &, int);
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;
+ o = reinterpret_cast<klass *>(object);
+ m = reinterpret_cast<void (klass::*)(watcher &, int)>(method);
}
- void call (watcher *w, int e) const
+ // 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)
{
- return prxy->call (obj, meth, *w, e);
+ (o->*m) (*w, revents);
}
};
- #include "ev.h"
+ 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;
/* 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); \
+ #define EV_BEGIN_WATCHER(cppstem,cstem) \
\
struct cppstem : ev_ ## cstem, callback<cppstem> \
{ \
EV_CONSTRUCT (cppstem) \
{ \
- ev_init (static_cast<ev_ ## cstem *>(this), cb_ ## cppstem); \
+ ev_init (static_cast<ev_ ## cstem *>(this), thunk); \
} \
\
bool is_active () const \
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:
- EV_DECLARE_WATCHER (io, io)
+ #define EV_END_WATCHER(cppstem,cstem) \
+ };
+
+ EV_BEGIN_WATCHER (io, io)
void set (int fd, int events)
{
int active = is_active ();
set (fd, events);
start ();
}
- };
+ EV_END_WATCHER (io, io)
- EV_DECLARE_WATCHER (timer, timer)
+ EV_BEGIN_WATCHER (timer, timer)
void set (ev_tstamp after, ev_tstamp repeat = 0.)
{
int active = is_active ();
{
ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
}
- };
+ EV_END_WATCHER (timer, timer)
- EV_DECLARE_WATCHER (periodic, periodic)
+ #if EV_PERIODIC_ENABLE
+ EV_BEGIN_WATCHER (periodic, periodic)
void set (ev_tstamp at, ev_tstamp interval = 0.)
{
int active = is_active ();
{
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_END_WATCHER (periodic, periodic)
+ #endif
- EV_DECLARE_WATCHER (sig, signal)
+ EV_BEGIN_WATCHER (sig, signal)
void set (int signum)
{
int active = is_active ();
set (signum);
start ();
}
- };
+ EV_END_WATCHER (sig, signal)
- EV_DECLARE_WATCHER (child, child)
+ EV_BEGIN_WATCHER (child, child)
void set (int pid)
{
int active = is_active ();
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_DECLARE_WATCHER
+ #undef EV_BEGIN_WATCHER
+ #undef EV_END_WATCHER
}
#endif
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