[mnordell] 29530: Added some descriptive comments for otherwise hard-to-understand bitwise operations

Author: mnordell
Date: Fri Oct 12 13:52:23 2007
New Revision: 29530

URL: http://svn.reactos.org/svn/reactos?rev=29530&view=rev
Log:
Added some descriptive comments for otherwise hard-to-understand bitwise operations

Modified:
    trunk/reactos/ntoskrnl/ob/obref.c

Modified: trunk/reactos/ntoskrnl/ob/obref.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ob/obref.c?rev=295...
==============================================================================
--- trunk/reactos/ntoskrnl/ob/obref.c (original)
+++ trunk/reactos/ntoskrnl/ob/obref.c Fri Oct 12 13:52:23 2007
@@ -494,6 +494,9 @@
                 GrantedAccess = CurrentProcess->GrantedAccess;

/* Validate access */
+                /* ~GrantedAccess = RefusedAccess.*/
+                /* ~GrantedAccess & DesiredAccess = list of refused bits. */
+                /* !(~GrantedAccess & DesiredAccess) == TRUE means ALL requested rights are granted */
                 if ((AccessMode == KernelMode) ||
                     !(~GrantedAccess & DesiredAccess))
                 {                   
@@ -539,6 +542,9 @@
                 GrantedAccess = CurrentThread->GrantedAccess;

/* Validate access */
+                /* ~GrantedAccess = RefusedAccess.*/
+                /* ~GrantedAccess & DesiredAccess = list of refused bits. */
+                /* !(~GrantedAccess & DesiredAccess) == TRUE means ALL requested rights are granted */
                 if ((AccessMode == KernelMode) ||
                     !(~GrantedAccess & DesiredAccess))
                 {                   
@@ -608,6 +614,9 @@
             GrantedAccess = HandleEntry->GrantedAccess;

/* Validate access */
+            /* ~GrantedAccess = RefusedAccess.*/
+            /* ~GrantedAccess & DesiredAccess = list of refused bits. */
+            /* !(~GrantedAccess & DesiredAccess) == TRUE means ALL requested rights are granted */
             if ((AccessMode == KernelMode) ||
                 !(~GrantedAccess & DesiredAccess))
             {