Resuscitate POSIX subsystem from revision 21378.

[reactos.git] / rossubsys / posix / include / psx / safeobj.h

diff --git a/rossubsys/posix/include/psx/safeobj.h b/rossubsys/posix/include/psx/safeobj.h
new file mode 100644 (file)
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+++ b/rossubsys/posix/include/psx/safeobj.h
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+/* $Id: safeobj.h,v 1.4 2002/10/29 04:45:15 rex Exp $
+ */
+/*
+ * psx/safeobj.h
+ *
+ * types and definitions for safe checking of user-provided objects
+ *
+ * This file is part of the ReactOS Operating System.
+ *
+ * Contributors:
+ *  Created by KJK::Hyperion <noog@libero.it>
+ *
+ *  THIS SOFTWARE IS NOT COPYRIGHTED
+ *
+ *  This source code is offered for use in the public domain. You may
+ *  use, modify or distribute it freely.
+ *
+ *  This code is distributed in the hope that it will be useful but
+ *  WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
+ *  DISCLAMED. This includes but is not limited to warranties of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+#ifndef __PSX_SAFEOBJ_H_INCLUDED__
+#define __PSX_SAFEOBJ_H_INCLUDED__
+
+/* INCLUDES */
+#include <inttypes.h>
+
+/* OBJECTS */
+
+/* TYPES */
+typedef uint32_t __magic_t;
+
+/* CONSTANTS */
+
+/* PROTOTYPES */
+int __safeobj_validate(void *, __magic_t);
+
+/* MACROS */
+/* builds a magic number from 4 characters */
+#define MAGIC(a,b,c,d) ( \
+ (((uint32_t)(uint8_t)(a)) << 24) | \
+ (((uint32_t)(uint8_t)(b)) << 16) | \
+ (((uint32_t)(uint8_t)(c)) <<  8) | \
+ (((uint32_t)(uint8_t)(d)) <<  0) \
+)
+
+/* retrieves a comma-separated list of the 4 characters in a magic number */
+#define MAGIC_DECOMPOSE(m) \
+ ((uint8_t)(m >> 24)), \
+ ((uint8_t)(m >> 16)), \
+ ((uint8_t)(m >>  8)), \
+ ((uint8_t)(m >>  0))
+
+#endif /* __PSX_SAFEOBJ_H_INCLUDED__ */
+
+/* EOF */
+