| Event::MakeMaker(3pm) | User Contributed Perl Documentation | Event::MakeMaker(3pm) |
Event::MakeMaker - MakeMaker glue for the C-level Event API
This is an advanced feature of Event.
For optimal performance, hook into Event at the C-level. You'll need to make changes to your "Makefile.PL" and add code to your "xs" / "c" file(s).
When you hook in at the C-level you get a huge performance gain, but you also reduce the chances that your code will work unmodified with newer versions of "perl" or "Event". This may or may not be a problem. Just be aware, and set your expectations accordingly.
use Event::MakeMaker qw(event_args); # ... set up %args ... WriteMakefile(event_args(%args));
#include "EventAPI.h"
BOOT:
I_EVENT_API("YourModule");
struct EventAPI {
I32 Ver;
/* EVENTS */
void (*queue )(pe_event *ev);
void (*start )(pe_watcher *ev, int repeat);
void (*now )(pe_watcher *ev);
void (*stop )(pe_watcher *ev, int cancel_events);
void (*cancel )(pe_watcher *ev);
void (*suspend )(pe_watcher *ev);
void (*resume )(pe_watcher *ev);
/* All constructors optionally take a stash and template. Either
or both can be NULL. The template should not be a reference. */
pe_idle *(*new_idle )(HV*, SV*);
pe_timer *(*new_timer )(HV*, SV*);
pe_io *(*new_io )(HV*, SV*);
pe_var *(*new_var )(HV*, SV*);
pe_signal *(*new_signal)(HV*, SV*);
/* TIMEABLE */
void (*tstart)(pe_timeable *);
void (*tstop)(pe_timeable *);
/* HOOKS */
pe_qcallback *(*add_hook)(char *which, void *cb, void *ext_data);
void (*cancel_hook)(pe_qcallback *qcb);
/* STATS */
void (*install_stats)(pe_event_stats_vtbl *esvtbl);
void (*collect_stats)(int yes);
pe_ring *AllWatchers;
/* TYPEMAP */
SV *(*watcher_2sv)(pe_watcher *wa);
void *(*sv_2watcher)(SV *sv);
SV *(*event_2sv)(pe_event *ev);
void *(*sv_2event)(SV *sv);
};
static pe_io *X11_ev=0;
static void x_server_dispatch(void *ext_data)
{ ... }
if (!X11_ev) {
X11_ev = GEventAPI->new_io(0,0);
X11_ev->poll = PE_R;
sv_setpv(X11_ev->base.desc, "X::Server");
X11_ev->base.callback = (void*) x_server_dispatch;
X11_ev->base.ext_data = <whatever>;
X11_ev->base.prio = PE_PRIO_NORMAL;
}
X11_ev->fd = x_fd;
GEventAPI->resume((pe_event*) X11_ev);
GEventAPI->start((pe_event*) X11_ev, 0);
I'd prefer not to export the entire Event.h apparatus in favor of minimizing interdependencies. If you really, really need to create a new type of watcher send your problem analysis to the mailing list!
| 2018-11-26 | perl v5.28.0 |