--- Coro/Event/Event.xs	2001/08/16 22:09:12	1.2
+++ Coro/Event/Event.xs	2002/04/14 01:18:38	1.8
@@ -2,13 +2,156 @@
 #include "perl.h"
 #include "XSUB.h"
 
+#include <string.h>
+
+/* this useful idiom is unfortunately missing... */
+static void
+confess (const char *msg)
+{
+  dSP;
+
+  PUSHMARK(SP);
+  XPUSHs (sv_2mortal(newSVpv("only one coroutine can wait for an event",0)));
+  PUTBACK;
+  call_pv ("Carp::confess", G_VOID);
+}
+
 #include "EventAPI.h"
 #include "../Coro/CoroAPI.h"
 
+#define CD_CORO	0
+#define CD_TYPE	1
+#define CD_OK	2
+#define CD_PRIO	3 /* hardcoded in Coro::Event */
+#define CD_HITS	4 /* hardcoded in Coro::Event */
+#define CD_GOT	5 /* hardcoded in Coro::Event, Coro::Handle */
+#define CD_MAX	5
+
+#define EV_CLASS "Coro::Event"
+
+static pe_idle *scheduler;
+static int do_schedule;
+
+#define NEED_SCHEDULE if (!do_schedule)					\
+                        {						\
+ 		          do_schedule = 1;				\
+		          GEventAPI->now ((pe_watcher *)scheduler);	\
+                        }
+
+static void
+coro_std_cb(pe_event *pe)
+{
+  AV *priv = (AV *)pe->ext_data;
+  IV type = SvIV (*av_fetch (priv, CD_TYPE, 1));
+  SV **cd_coro = &AvARRAY(priv)[CD_CORO];
+
+  sv_setiv (AvARRAY(priv)[CD_PRIO], pe->prio);
+  sv_setiv (AvARRAY(priv)[CD_HITS], pe->hits);
+
+  if (type == 1)
+    sv_setiv (AvARRAY(priv)[CD_GOT], ((pe_ioevent *)pe)->got);
+
+  if (*cd_coro != &PL_sv_undef)
+    {
+      CORO_READY (*cd_coro);
+      SvREFCNT_dec (*cd_coro);
+      *cd_coro = &PL_sv_undef;
+      NEED_SCHEDULE;
+    }
+  else
+    {
+      AvARRAY(priv)[CD_OK] = &PL_sv_yes;
+      GEventAPI->stop (pe->up, 0);
+    }
+}
+
+static void
+scheduler_cb(pe_event *pe)
+{
+  while (CORO_NREADY)
+    CORO_CEDE;
+
+  do_schedule = 0;
+}
+
 MODULE = Coro::Event                PACKAGE = Coro::Event
 
+PROTOTYPES: ENABLE
+
 BOOT:
 {
         I_EVENT_API("Coro::Event");
 	I_CORO_API ("Coro::Event");
+
+        /* create a fake idle handler (we only ever call now) */
+        scheduler = GEventAPI->new_idle (0, 0);
+        scheduler->base.callback = scheduler_cb;
+        scheduler->base.prio = PE_PRIO_NORMAL; /* StarvePrio */
+        scheduler->min_interval = newSVnv (0);
+        scheduler->max_interval = newSVnv (0);
+        GEventAPI->stop ((pe_watcher *)scheduler, 0);
 }
+
+void
+_install_std_cb(self,type)
+	SV *	self
+        int	type
+        CODE:
+        pe_watcher *w = GEventAPI->sv_2watcher (self);
+        AV *priv = newAV ();
+        SV *rv = newRV_noinc ((SV *)priv);
+
+        av_extend (priv, CD_MAX);
+        av_store (priv, CD_CORO, &PL_sv_undef);
+        av_store (priv, CD_TYPE, newSViv (type));
+        av_store (priv, CD_OK  , &PL_sv_no);
+        av_store (priv, CD_PRIO, newSViv (0));
+        av_store (priv, CD_HITS, newSViv (0));
+        av_store (priv, CD_GOT , type ? newSViv (0) : &PL_sv_undef);
+        SvREADONLY_on (priv);
+
+        w->callback = coro_std_cb;
+        w->ext_data = priv;
+
+        hv_store ((HV *)SvRV (self),
+                  EV_CLASS, strlen (EV_CLASS),
+                  rv, 0);
+
+        GEventAPI->start (w, 0);
+
+void
+_next(self)
+	SV *	self
+        CODE:
+        pe_watcher *w = GEventAPI->sv_2watcher (self);
+        AV *priv = (AV *)w->ext_data;
+
+        if (!w->running)
+          GEventAPI->start (w, 1);
+
+        if (AvARRAY(priv)[CD_OK] == &PL_sv_yes)
+          {
+            AvARRAY(priv)[CD_OK] = &PL_sv_no;
+            XSRETURN_NO;
+          }
+        else 
+          {
+            if (AvARRAY(priv)[CD_CORO] != &PL_sv_undef)
+              confess ("only one coroutine can wait for an event");
+
+            AvARRAY(priv)[CD_CORO] = SvREFCNT_inc (CORO_CURRENT);
+            XSRETURN_YES;
+          }
+
+MODULE = Coro::Event                PACKAGE = Coro
+
+# overwrite the ready function
+void
+ready(self)
+	SV *	self
+        PROTOTYPE: $
+	CODE:
+        NEED_SCHEDULE;
+        CORO_READY (self);
+
+