--- Coro/Event/Event.xs	2001/08/16 22:09:12	1.2
+++ Coro/Event/Event.xs	2007/01/24 16:22:08	1.19
@@ -2,13 +2,160 @@
 #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;
+
+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 double
+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:
 {
-        I_EVENT_API("Coro::Event");
+	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 = 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 = coro_std_cb;
+          w->ext_data = priv;
+
+          /* make sure Event does not use PERL_MAGIC_uvar, which */
+          /* we abuse for non-uvar purposes. */
+          sv_magicext (SvRV (self), newRV_noinc ((SV *)priv), PERL_MAGIC_uvar, 0, 0, 0);
+        }
 }
+
+void
+_next (SV *self)
+        CODE:
+{
+        pe_watcher *w = 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 = 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
+