--- IO-AIO/AIO.xs	2006/10/23 22:44:21	1.61
+++ IO-AIO/AIO.xs	2006/10/23 23:48:31	1.63
@@ -1,4 +1,9 @@
+#if __linux
+# define _GNU_SOURCE
+#endif
+
 #define _REENTRANT 1
+
 #include <errno.h>
 
 #include "EXTERN.h"
@@ -111,8 +116,14 @@
 static int max_outstanding = 1<<30;
 static int respipe [2];
 
-static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
-static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
+#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
+# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
+#else
+# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
+#endif
+
+static pthread_mutex_t reslock = AIO_MUTEX_INIT;
+static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
 static pthread_cond_t  reqwait = PTHREAD_COND_INITIALIZER;
 
 static volatile aio_req reqs, reqe; /* queue start, queue end */
@@ -193,6 +204,8 @@
 
 static void poll_wait ()
 {
+  fd_set rfd;
+
   while (nreqs)
     {
       aio_req req;
@@ -203,7 +216,6 @@
       if (req)
         return;
 
-      fd_set rfd;
       FD_ZERO(&rfd);
       FD_SET(respipe [0], &rfd);