--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/nucleus/pid.c	Fri May 15 01:28:16 2020 +0000
@@ -0,0 +1,87 @@
+/*************************************************************************/
+/*                                                                       */
+/*               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       */
+/*                                                                       */
+/*      pid.c                                          Nucleus PLUS 1.14 */
+/*                                                                       */
+/* COMPONENT                                                             */
+/*                                                                       */
+/*      PI - Pipe Management                                             */
+/*                                                                       */
+/* DESCRIPTION                                                           */
+/*                                                                       */
+/*      This file contains global data structures for use within the     */
+/*      pipe management component.                                       */
+/*                                                                       */
+/* DATA STRUCTURES                                                       */
+/*                                                                       */
+/*      PID_Created_Pipe_List               Pointer to the linked-list   */
+/*                                            of created pipes           */
+/*      PID_Total_Pipes                     Total number of created      */
+/*                                            pipes                      */
+/*      PID_List_Protect                    Pipe list protection         */
+/*                                                                       */
+/* FUNCTIONS                                                             */
+/*                                                                       */
+/*      None                                                             */
+/*                                                                       */
+/* DEPENDENCIES                                                          */
+/*                                                                       */
+/*      pi_defs.h                           Pipe Management constants    */
+/*                                                                       */
+/* HISTORY                                                               */
+/*                                                                       */
+/*         DATE                    REMARKS                               */
+/*                                                                       */
+/*      03-01-1993      Created initial version 1.0                      */
+/*      04-19-1993      Verified version 1.0                             */
+/*      03-01-1994      Modified copyright, 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                            */
+/*************************************************************************/
+#define         NU_SOURCE_FILE
+
+#include        "pi_defs.h"                 /* Pipe constants            */
+
+
+/* PID_Created_Pipes_List is the head pointer of the linked list of
+   created pipes.  If the list is NU_NULL, there are no pipes
+   created.  */
+
+CS_NODE        *PID_Created_Pipes_List;
+
+
+/* PID_Total_Pipes contains the number of currently created
+   pipes.  */
+
+UNSIGNED        PID_Total_Pipes;
+
+
+/* PID_List_Protect is a list protection structure used to block any other
+   thread from access to the created pipe list.  */
+
+TC_PROTECT      PID_List_Protect;
+
+
+
+
+
+