--- IO-AIO/AIO.xs	2008/06/19 09:05:43	1.125
+++ IO-AIO/AIO.xs	2008/09/30 13:17:32	1.127
@@ -82,6 +82,19 @@
 # define SvVAL64 SvNV
 #endif
 
+/*****************************************************************************/
+
+#if __GNUC__ >= 3
+# define expect(expr,value) __builtin_expect ((expr),(value))
+#else
+# define expect(expr,value) (expr)
+#endif
+
+#define expect_false(expr) expect ((expr) != 0, 0)
+#define expect_true(expr)  expect ((expr) != 0, 1)
+
+/*****************************************************************************/
+
 static HV *stash;
 typedef SV SV8; /* byte-sv, used for argument-checking */
 
@@ -183,7 +196,7 @@
 {
   eio_submit (req);
 
-  if (on_next_submit)
+  if (expect_false (on_next_submit))
     {
       dSP;
       SV *cb = sv_2mortal (on_next_submit);
@@ -466,7 +479,9 @@
   req->pri = req_pri
 
 #define REQ_SEND						\
+  PUTBACK;							\
   req_submit (req);						\
+  SPAGAIN;							\
 								\
   if (GIMME_V != G_VOID)					\
     XPUSHs (req_sv (req, AIO_REQ_KLASS));
@@ -896,7 +911,7 @@
 
         req->type = EIO_GROUP;
 
-        eio_submit (req);
+        req_submit (req);
         XPUSHs (req_sv (req, AIO_GRP_KLASS));
 }