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#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include <assert.h>
#include <string.h>
#include "EventAPI.h"
#include "../Coro/CoroAPI.h"
#define CD_WAIT 0 /* wait queue */
#define CD_TYPE 1
#define CD_OK 2
#define CD_HITS 3 /* hardcoded in Coro::Event */
#define CD_GOT 4 /* hardcoded in Coro::Event, Coro::Handle */
#define CD_MAX 4
static HV *coro_event_event_stash;
#define PERL_MAGIC_coro_event 0x18 /* to avoid clashes with e.g. event */
static void
coro_std_cb (pe_event *pe)
{
AV *priv = (AV *)pe->ext_data;
IV type = SvIV (AvARRAY (priv)[CD_TYPE]);
AV *cd_wait;
SV *coro;
SvIV_set (AvARRAY (priv)[CD_HITS], pe->hits);
SvIV_set (AvARRAY (priv)[CD_GOT], type ? ((pe_ioevent *)pe)->got : 0);
AvARRAY (priv)[CD_OK] = &PL_sv_yes;
cd_wait = (AV *)AvARRAY(priv)[CD_WAIT];
coro = av_shift (cd_wait);
if (coro != &PL_sv_undef)
{
CORO_READY (coro);
SvREFCNT_dec (coro);
}
if (av_len (cd_wait) < 0)
GEventAPI->stop (pe->up, 0);
}
static void
asynccheck_hook (void *data)
{
/* this loops as long as we have _other_ coros with the same or higher priority */
while (CORO_NREADY && CORO_CEDE)
;
}
static NV
prepare_hook (void *data)
{
/* this yields once to another coro with any priority */
if (CORO_NREADY)
{
CORO_CEDE_NOTSELF;
/*
* timers might have changed, and Event fails to notice this
* so we have to assume the worst. If Event didn't have that bug,
* we would only need to do this if CORO_NREADY is != 0 now.
*/
return 0.;
}
else
return 85197.73; /* this is as good as any value, but it factors badly with common values */
}
MODULE = Coro::Event PACKAGE = Coro::Event
PROTOTYPES: ENABLE
BOOT:
{
coro_event_event_stash = gv_stashpv ("Coro::Event::Event", TRUE);
I_EVENT_API ("Coro::Event");
I_CORO_API ("Coro::Event");
GEventAPI->add_hook ("asynccheck", (void *)asynccheck_hook, 0);
GEventAPI->add_hook ("prepare", (void *)prepare_hook, 0);
}
void
_install_std_cb (SV *self, int type)
CODE:
{
pe_watcher *w = (pe_watcher *)GEventAPI->sv_2watcher (self);
if (w->callback)
croak ("Coro::Event watchers must not have a callback (see Coro::Event), caught");
{
AV *priv = newAV ();
av_fill (priv, CD_MAX);
AvARRAY (priv)[CD_WAIT] = (SV *)newAV (); /* AV in AV _should_ not be exposed to perl */
AvARRAY (priv)[CD_TYPE] = newSViv (type);
AvARRAY (priv)[CD_OK ] = &PL_sv_no;
AvARRAY (priv)[CD_HITS] = newSViv (0);
AvARRAY (priv)[CD_GOT ] = newSViv (0);
SvREADONLY_on (priv);
w->callback = (void *)coro_std_cb;
w->ext_data = priv;
{
SV *mob = newRV_noinc ((SV *)priv);
sv_magicext (SvRV (self), mob, PERL_MAGIC_coro_event, 0, (char *)w, 0);
SvREFCNT_dec (mob); /* sv_magicext increments the refcount */
}
}
}
void
_next (SV *self)
CODE:
{
pe_watcher *w = (pe_watcher *)GEventAPI->sv_2watcher (self);
AV *priv = (AV *)w->ext_data;
if (AvARRAY (priv)[CD_OK] == &PL_sv_yes)
{
AvARRAY (priv)[CD_OK] = &PL_sv_no;
XSRETURN_NO; /* got an event */
}
av_push ((AV *)AvARRAY (priv)[CD_WAIT], SvREFCNT_inc (CORO_CURRENT));
if (!w->running)
GEventAPI->start (w, 1);
XSRETURN_YES; /* schedule */
}
SV *
_event (SV *self)
CODE:
{
if (GIMME_V == G_VOID)
XSRETURN_EMPTY;
{
pe_watcher *w = (pe_watcher *)GEventAPI->sv_2watcher (self);
AV *priv = (AV *)w->ext_data;
RETVAL = newRV_inc ((SV *)priv);
/* may need to bless it now */
if (!SvOBJECT (priv))
{
SvREADONLY_off ((SV *)priv);
sv_bless (RETVAL, coro_event_event_stash);
SvREADONLY_on ((SV *)priv);
}
}
}
OUTPUT:
RETVAL
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