1 files changed, 49 insertions, 0 deletions
diff --git a/public/sdk/inc/crt/sys/locking.h b/public/sdk/inc/crt/sys/locking.h
new file mode 100644
index 000000000..14cd90bd1
--- /dev/null
+++ b/public/sdk/inc/crt/sys/locking.h
@@ -0,0 +1,49 @@
+/***
+*sys/locking.h - flags for locking() function
+*
+*	Copyright (c) 1985-1995, Microsoft Corporation. All rights reserved.
+*
+*Purpose:
+*	This file defines the flags for the locking() function.
+*	[System V]
+*
+*       [Public]
+*
+****/
+
+#if _MSC_VER > 1000
+#pragma once
+#endif
+
+#ifndef _INC_LOCKING
+#define _INC_LOCKING
+
+#if !defined(_WIN32) && !defined(_MAC)
+#error ERROR: Only Mac or Win32 targets supported!
+#endif
+
+
+#define _LK_UNLCK	0	/* unlock the file region */
+#ifdef _WIN32
+#define _LK_LOCK	1	/* lock the file region */
+#endif
+#define _LK_NBLCK	2	/* non-blocking lock */
+#ifdef _WIN32
+#define _LK_RLCK	3	/* lock for writing */
+#endif
+#define _LK_NBRLCK	4	/* non-blocking lock for writing */
+
+#if !__STDC__
+/* Non-ANSI names for compatibility */
+#define LK_UNLCK	_LK_UNLCK
+#ifdef _WIN32
+#define LK_LOCK 	_LK_LOCK
+#endif
+#define LK_NBLCK	_LK_NBLCK
+#ifdef _WIN32
+#define LK_RLCK 	_LK_RLCK
+#endif
+#define LK_NBRLCK	_LK_NBRLCK
+#endif
+
+#endif	/* _INC_LOCKING */