1 files changed, 52 insertions, 0 deletions
diff --git a/rtkaio/tst-aiod.h b/rtkaio/tst-aiod.h
new file mode 100644
index 0000000000..57f0e48ce5
--- /dev/null
+++ b/rtkaio/tst-aiod.h
@@ -0,0 +1,52 @@
+/* Tests for AIO in librt.
+   Copyright (C) 1998, 2000, 2002, 2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+static int
+set_o_direct (int fd)
+{
+  int ret = -1;
+#ifdef O_DIRECT
+  if (fcntl (fd, F_SETFL, fcntl (fd, F_GETFL) | O_DIRECT) >= 0)
+    {
+      int pgsz = sysconf (_SC_PAGESIZE);
+      char *buf = mmap (NULL, 16 * pgsz, PROT_READ | PROT_WRITE,
+			MAP_PRIVATE | MAP_ANON, -1, 0);
+      if (buf != MAP_FAILED)
+	{
+	  memset (buf, 0, 16 * pgsz);
+	  for (int sz = 256; sz <= 16 * pgsz; sz *= 2)
+	    if (write (fd, buf, sz) > 0)
+	      {
+		ret = sz;
+		break;
+	      }
+	  ftruncate64 (fd, 0);
+	  munmap (buf, 16 * pgsz);
+	}
+      if (ret < 0)
+	fcntl (fd, F_SETFL, fcntl (fd, F_GETFL) & ~O_DIRECT);
+    }
+#endif
+  return ret;
+}