--- IO-AIO/AIO.xs	2008/05/10 19:25:33	1.116
+++ IO-AIO/AIO.xs	2008/05/10 20:02:09	1.117
@@ -103,9 +103,9 @@
 typedef eio_req *aio_req;
 typedef eio_req *aio_req_ornot;
 
-static int max_outstanding = 0;
-
+static SV *on_next_submit;
 static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
+static int max_outstanding;
 
 static int respipe_osf [2], respipe [2] = { -1, -1 };
 
@@ -168,6 +168,23 @@
     }
 }
 
+static void req_submit (eio_req *req)
+{
+  eio_submit (req);
+
+  if (on_next_submit)
+    {
+      dSP;
+      SV *cb = sv_2mortal (on_next_submit);
+
+      on_next_submit = 0;
+
+      PUSHMARK (SP);
+      PUTBACK;
+      call_sv (cb, G_DISCARD | G_EVAL);
+    }
+}
+
 static int req_invoke (eio_req *req)
 {
   dSP;
@@ -442,7 +459,7 @@
   req->pri = req_pri
 
 #define REQ_SEND						\
-  eio_submit (req);						\
+  req_submit (req);						\
 								\
   if (GIMME_V != G_VOID)					\
     XPUSHs (req_sv (req, AIO_REQ_KLASS));
@@ -1005,6 +1022,11 @@
 	OUTPUT:
 	RETVAL
 
+void _on_next_submit (SV *cb)
+	CODE:
+        SvREFCNT_dec (on_next_submit);
+        on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
+
 PROTOTYPES: DISABLE
 
 MODULE = IO::AIO                PACKAGE = IO::AIO::REQ