On Fri, Nov 09, 2007 at 01:28:08AM +0100, Chris Brody-GMail <[EMAIL PROTECTED]>
wrote:
> Your new archive built OK on my OSX machine-thanks again!
Great. I am about to check in a change that allwos you to override header
locations e.g. like this:
#define EV_H <ev_ev.h>
#include "ev.c"
#define EV_EVENT_H <event.h>
#include "event.c"
> > I also wondered about (optionally, when embedding, so not directly
> > relevant to eventxx) having a member pointer + object instead of a
> > callback when compiling libev as C++.
>
> I will need some time to think about a clear solution-should be
> possible with a "pure inline" wrapper class.
There are basically two options:
- when embedding (and only then) optionally allow use of c++ features, making
libev a full c++ library incompatible with the c interface.
this saves a pointer, thunking code, makes the code safer etc. but loses
c compatibility.
this is something I might likely go after for purely personal reasons - I
have a lot of c++ programs currently using iom.C which could be converted
to a libev c++ lib.
this would be done using real subclassing etc:
struct ev_io : ev_watcher_list {
...
start ()
stop ()
and would complement libev nicely as its quite object-oriented in design.
- take the c interface and adapt it, very rough proof of concept:
namespace ev {
#include <ev.h>
extern "C" void thunk_io_cb (struct ev_io *w, int revents)
{
static_cast<io *>(w)->(revents);
}
template<class base, class start, class stop>
struct adaptor : callback<ev_io *, int> {
adaptor ()
{
ev_watcher_init (static_cast<base> this, thunk_io_cb);
}
void start () { start (static_cast<base> this); }
...
};
struct io : ev_io, adaptor<ev_io, evio_start, evio_stop> {
void set (int fd, int events) { ev_io_set (...); }
};
#undef ev_watcher_init /* dangerous in c++ */
...
};
/* I'll spare you the details of how callback<> is defined */
This would also allow a relatively natural usage, like:
ev::io w (fd, EV_READ);
w.start ();
etc.
--
The choice of a Deliantra, the free code+content MORPG
-----==- _GNU_ http://www.deliantra.net
----==-- _ generation
---==---(_)__ __ ____ __ Marc Lehmann
--==---/ / _ \/ // /\ \/ / [EMAIL PROTECTED]
-=====/_/_//_/\_,_/ /_/\_\
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