[hbelusca] 63311: [NTVDM] Implement INT 21h, AH=5Ch "Lock/Unlock Region of File".

Author: hbelusca
Date: Fri May 16 00:56:46 2014
New Revision: 63311

URL: http://svn.reactos.org/svn/reactos?rev=63311&view=rev
Log:
[NTVDM]
Implement INT 21h, AH=5Ch "Lock/Unlock Region of File".

Modified:
    trunk/reactos/subsystems/ntvdm/dos/dos32krnl/dos.c

Modified: trunk/reactos/subsystems/ntvdm/dos/dos32krnl/dos.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/ntvdm/dos/dos32k...
==============================================================================
--- trunk/reactos/subsystems/ntvdm/dos/dos32krnl/dos.c	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/ntvdm/dos/dos32krnl/dos.c	[iso-8859-1] Fri May 16 00:56:46 2014
@@ -2622,6 +2622,59 @@
             break;
         }

+        /* Lock/Unlock Region of File */
+        case 0x5C:
+        {
+            HANDLE Handle = DosGetRealHandle(getBX());
+
+            if (Handle == INVALID_HANDLE_VALUE)
+            {
+                /* The handle is invalid */
+                Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
+                setAX(ERROR_INVALID_HANDLE);
+                break;
+            }
+
+            if (getAL() == 0x00)
+            {
+                /* Lock region of file */
+                if (LockFile(Handle,
+                             MAKELONG(getCX(), getDX()), 0,
+                             MAKELONG(getSI(), getDI()), 0))
+                {
+                    Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
+                }
+                else
+                {
+                    Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
+                    setAX(GetLastError());
+                }
+            }
+            else if (getAL() == 0x01)
+            {
+                /* Unlock region of file */
+                if (UnlockFile(Handle,
+                               MAKELONG(getCX(), getDX()), 0,
+                               MAKELONG(getSI(), getDI()), 0))
+                {
+                    Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
+                }
+                else
+                {
+                    Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
+                    setAX(GetLastError());
+                }
+            }
+            else
+            {
+                /* Invalid subfunction */
+                Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
+                setAX(ERROR_INVALID_FUNCTION);
+            }
+
+            break;
+        }
+
         /* Canonicalize File Name or Path */
         case 0x60:
         {