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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose:
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef VPHYSICS_INTERNAL_H
+#define VPHYSICS_INTERNAL_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "tier0/memalloc.h"
+
+extern class IPhysics *g_PhysicsInternal;
+
+//-----------------------------------------------------------------------------
+// Memory debugging
+//-----------------------------------------------------------------------------
+#if defined(_DEBUG) || defined(USE_MEM_DEBUG)
+#define BEGIN_IVP_ALLOCATION() MemAlloc_PushAllocDbgInfo("IVP: " __FILE__ , __LINE__ )
+#define END_IVP_ALLOCATION() MemAlloc_PopAllocDbgInfo()
+#else
+#define BEGIN_IVP_ALLOCATION() 0
+#define END_IVP_ALLOCATION() 0
+#endif
+
+
+#endif // VPHYSICS_INTERNAL_H