1 files changed, 27 insertions, 0 deletions
diff --git a/src/os_win/os_errno.c b/src/os_win/os_errno.c
new file mode 100644
index 00000000000..23d006cac85
--- /dev/null
+++ b/src/os_win/os_errno.c
@@ -0,0 +1,27 @@
+/*-
+ * Copyright (c) 2008-2014 WiredTiger, Inc.
+ *	All rights reserved.
+ *
+ * See the file LICENSE for redistribution information.
+ */
+
+#include "wt_internal.h"
+
+/*
+ * __wt_errno --
+ *	Return errno, or WT_ERROR if errno not set.
+ */
+int
+__wt_errno(void)
+{
+	/*
+	 * Called when we know an error occurred, and we want the system
+	 * error code, but there's some chance it's not set.
+	 */
+	DWORD err = GetLastError();
+
+	/* GLE should only be called if we hit an actual error */
+	WT_ASSERT(NULL, err != ERROR_SUCCESS);
+
+	return (err == ERROR_SUCCESS ? WT_ERROR : err);
+}