--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/nucleus/io_extr.h	Fri May 15 01:28:16 2020 +0000
@@ -0,0 +1,111 @@
+/*************************************************************************/
+/*                                                                       */
+/*               Copyright Mentor Graphics Corporation 2002              */
+/*                         All Rights Reserved.                          */
+/*                                                                       */
+/* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS  */
+/* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS   */
+/* SUBJECT TO LICENSE TERMS.                                             */
+/*                                                                       */
+/*************************************************************************/
+
+/*************************************************************************/
+/*                                                                       */
+/* FILE NAME                                               VERSION       */
+/*                                                                       */
+/*      io_extr.h                                      Nucleus PLUS 1.14 */
+/*                                                                       */
+/* COMPONENT                                                             */
+/*                                                                       */
+/*      IO - Input/Output Driver Management                              */
+/*                                                                       */
+/* DESCRIPTION                                                           */
+/*                                                                       */
+/*      This file contains function prototypes of all functions          */
+/*      accessible to other components.                                  */
+/*                                                                       */
+/* DATA STRUCTURES                                                       */
+/*                                                                       */
+/*      None                                                             */
+/*                                                                       */
+/* FUNCTIONS                                                             */
+/*                                                                       */
+/*      None                                                             */
+/*                                                                       */
+/* DEPENDENCIES                                                          */
+/*                                                                       */
+/*      io_defs.h                           I/O Driver Management consts */
+/*      tc_defs.h                           Thread control constants     */
+/*                                                                       */
+/* HISTORY                                                               */
+/*                                                                       */
+/*        DATE                    REMARKS                                */
+/*                                                                       */
+/*      03-01-1993      Created initial version 1.0                      */
+/*      04-19-1993      Verified version 1.0                             */
+/*      03-01-1994      Moved include files outside of                   */
+/*                      the file #ifndef to allow the                    */
+/*                      use of actual data structures,                   */ 
+/*                      changed function interfaces,                     */
+/*                      resulting in version 1.1                         */
+/*                                                                       */
+/*      03-18-1994      Verified version 1.1                             */
+/*      04-17-1996      updated to version 1.2                           */
+/*      03-24-1998      Released version 1.3                             */
+/*      03-26-1999      Released 1.11m (new release                      */
+/*                        numbering scheme)                              */
+/*      04-17-2002      Released version 1.13m                           */
+/*      11-07-2002      Released version 1.14                            */
+/*************************************************************************/
+
+#include        "io_defs.h"                 /* Include IO constants      */
+#include        "tc_defs.h"                 /* Thread control constants  */
+
+
+/* Check to see if the file has been included already.  */
+
+#ifndef IO_EXTR
+#define IO_EXTR
+
+
+/*  Initialization functions.  */
+
+VOID            IOI_Initialize(VOID);
+
+
+/* Error checking functions.  */
+
+STATUS          IOCE_Create_Driver(NU_DRIVER *driver, CHAR *name, 
+                    VOID (*driver_entry)(NU_DRIVER *, NU_DRIVER_REQUEST *));
+STATUS          IOCE_Delete_Driver(NU_DRIVER *driver);
+STATUS          IOCE_Request_Driver(NU_DRIVER *driver, 
+                                                NU_DRIVER_REQUEST *request);
+STATUS          IOCE_Resume_Driver(NU_TASK *task);
+STATUS          IOCE_Suspend_Driver(VOID (*terminate_routine)(VOID *),
+                                      VOID *information, UNSIGNED timeout);
+
+
+/* Core processing functions.  */
+
+STATUS          IOC_Create_Driver(NU_DRIVER *driver, CHAR *name, 
+                    VOID (*driver_entry)(NU_DRIVER *, NU_DRIVER_REQUEST *));
+STATUS          IOC_Delete_Driver(NU_DRIVER *driver);
+STATUS          IOC_Request_Driver(NU_DRIVER *driver, 
+                                                NU_DRIVER_REQUEST *request);
+STATUS          IOC_Resume_Driver(NU_TASK *task);
+STATUS          IOC_Suspend_Driver(VOID (*terminate_routine)(VOID *),
+                                        VOID *information, UNSIGNED timeout);
+
+
+/* Information retrieval functions.  */
+
+UNSIGNED        IOF_Established_Drivers(VOID);
+UNSIGNED        IOF_Driver_Pointers(NU_DRIVER **pointer_list, 
+                                                UNSIGNED maximum_pointers);
+
+#endif
+
+
+
+
+