--- IO-AIO/AIO.xs	2018/01/06 01:04:42	1.251
+++ IO-AIO/AIO.xs	2018/02/20 04:32:59	1.253
@@ -108,6 +108,10 @@
 
 #include "libeio/config.h"
 
+#if HAVE_EVENTFD
+# include <sys/eventfd.h>
+#endif
+
 #if HAVE_RLIMITS
   #include <sys/time.h>
   #include <sys/resource.h>
@@ -701,7 +705,13 @@
                       sv_set_foreign (req->sv2, &sysfree_vtbl, req->ptr2, req->result);
                     }
                   else
-                    SvCUR_set (req->sv2, req->result);
+                    {
+                      SvCUR_set (req->sv2, req->result);
+                      *SvEND (req->sv2) = 0;
+                      SvPOK_only (req->sv2);
+                    }
+
+                  SvSETMAGIC (req->sv2);
                 }
 
               PUSHs (sv_result);
@@ -1157,6 +1167,10 @@
     const_iv (SPLICE_F_MORE)
     const_iv (SPLICE_F_GIFT)
 
+    const_iv (EFD_CLOEXEC)
+    const_iv (EFD_NONBLOCK)
+    const_iv (EFD_SEMAPHORE)
+
     /* these are libeio constants, and are independent of gendef0 */
     const_eio (SEEK_SET)
     const_eio (SEEK_CUR)
@@ -1417,7 +1431,7 @@
           {
             /* read: check type and grow scalar as necessary */
             if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
-              svptr = sv_grow (data, len + dataoffset);
+              svptr = sv_grow (data, len + dataoffset + 1);
             else if (SvCUR (data) < len + dataoffset)
               croak ("length + dataoffset outside of scalar, and cannot grow");
           }
@@ -1821,7 +1835,7 @@
         if (length) /* known length, directly read into scalar */
           {
             if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
-              svptr = sv_grow (data, length);
+              svptr = sv_grow (data, length + 1);
             else if (SvCUR (data) < length)
               croak ("length outside of scalar, and cannot grow");
             else
@@ -2152,6 +2166,20 @@
           }
 }
 
+void
+eventfd (unsigned int initval = 0, int flags = 0)
+	PPCODE:
+{
+	int fd;
+#if HAVE_EVENTFD
+        fd = eventfd (initval, flags);
+#else
+        fd = (errno = ENOSYS, -1);
+#endif
+	
+        XPUSHs (newmortalFH (fd, O_RDWR));
+}
+
 UV
 get_fdlimit ()
 	CODE: