--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/nucleus/erd.c	Fri Oct 16 06:23:26 2020 +0000
@@ -0,0 +1,142 @@
+/*************************************************************************/
+/*                                                                       */
+/*               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       */
+/*                                                                       */
+/*      erd.c                                          Nucleus PLUS 1.14 */
+/*                                                                       */
+/* COMPONENT                                                             */
+/*                                                                       */
+/*      ER - Error Management                                            */
+/*                                                                       */
+/* DESCRIPTION                                                           */
+/*                                                                       */
+/*      This file contains global data structures for use within the     */
+/*      Error Management component.                                      */
+/*                                                                       */
+/* DATA STRUCTURES                                                       */
+/*                                                                       */
+/*      ERD_Error_Code                      Contains the system error    */
+/*                                            code                       */
+/*      ERD_Error_String                    Contains the ASCII system    */
+/*                                            error string               */
+/*                                                                       */
+/* FUNCTIONS                                                             */
+/*                                                                       */
+/*      None                                                             */
+/*                                                                       */
+/* DEPENDENCIES                                                          */
+/*                                                                       */
+/*      nucleus.h                           System definitions           */
+/*                                                                       */
+/* HISTORY                                                               */
+/*                                                                       */
+/*        DATE                    REMARKS                                */
+/*                                                                       */
+/*      03-01-1993      Created initial version 1.0                      */
+/*      04-19-1993      Verified version 1.0                             */
+/*      03-01-1994      Modified copyright notice,                       */
+/*                      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.                            */
+/*      11-24-1998      Added ERD_Assert_Count.                          */
+/*      03-26-1999      Released 1.11m (new release                      */
+/*                        numbering scheme)                              */
+/*      04-07-1999      Release 1.11mA                                   */
+/*      04-17-2002      Released version 1.13m                           */
+/*      11-07-2002      Released version 1.14                            */
+/*************************************************************************/
+#define         NU_SOURCE_FILE
+
+#include        "nucleus.h"                 /* System definitions        */
+
+
+/* ERD_Error_Code contains the system error code detected by the system.  */
+
+INT     ERD_Error_Code;
+
+#ifdef NU_DEBUG
+
+/* ERD_Assert_Count contains the number of detected failed assertions. */
+UNSIGNED ERD_Assert_Count;
+
+#endif
+
+
+#ifdef          NU_ERROR_STRING
+
+/* ERD_Error_String is an area for building an ASCII string representation of
+   the system error.  */
+
+CHAR    ERD_Error_String[80];
+
+#endif
+
+#ifdef  NU_DEBUG_MEMORY
+
+#include "er_defs.h"
+
+/* NU_DEBUG_MEMORY wraps the calles to DMCE_Allocate_Memory and 
+   DMCE_Deallocate_Memory with a set of calls that help track memory 
+   problems in a memory pool.  The memory pool that will be examined
+   is determined by the NU_MEMORY_POOL macro. */
+
+/* The functions in NU_DEBUG_MEMORY require error checking.  
+   NU_DEBUG_MEMORY can not be defined with NU_NO_ERROR_CHECKING */
+
+#ifdef NU_NO_ERROR_CHECKING
+#error Can not define NU_DEBUG_MEMORY and NU_NO_ERROR_CHECKING at the same time!
+#endif /* NU_NO_ERROR_CHECKING */
+
+#ifndef NU_DEBUG
+#error NU_DEBUG must be defined when NU_DEBUG_MEMORY is enabled!
+#endif /* NU_NO_ERROR_CHECKING */
+
+/* ERD_AllocationCount is the current number of sucessful allocations that
+        have not been deallocated.
+   ERD_AllocationSequenceCounter identifies each successful allocation by 
+        numbering them in the order they are created.
+   ERD_TotalMemoryAllocated is the number of sucessful calls to 
+        NU_Allocate_Memory.
+   ERD_TotalMemoryAllocations is the sum of the sizes of each sucessful 
+        allocation.
+   ERD_MaxTotalMemoryAllocated is the most memory ever allocated at any
+        point in time.
+   ERD_MaxTotalMemoryAllocations is the most outstanding memory allocations
+        (those that are not deallocated) at any point in time. */
+
+UINT32 ERD_AllocationCount;
+UINT32 ERD_AllocationSequenceCounter;
+UINT32 ERD_TotalMemoryAllocated;
+UINT32 ERD_TotalMemoryAllocations;
+UINT32 ERD_MaxTotalMemoryAllocated;
+UINT32 ERD_MaxTotalMemoryAllocations;
+
+/* Constants to mark the header and footer */
+const UINT8 ERD_MemoryAllocationHead[] = {'H','E','A','D'};
+const UINT8 ERD_MemoryAllocationFoot[] = {'F','O','O','T'};
+
+/* This is the head of a linked list that holds all the currently
+   outstanding allocations in reverse chronological order.  
+   RED_RecentAllocation is the most recent.  The 'prev' field always
+   points to the allocation made beforehand. */
+ER_DEBUG_ALLOCATION *ERD_RecentAllocation;
+
+#endif /* NU_DEBUG_MEMORY */
+
+
+
+
+