GP-3276 Put all C++ classes in ghidra namespace

Ghidra/Features/Decompiler/src/decompile/cpp/architecture.hh

@@ -15,8 +15,8 @@
  */
 /// \file architecture.hh
 /// \brief Architecture and associated classes that help manage a single processor architecture and load image
-#ifndef __CPUI_ARCHITECTURE__
-#define __CPUI_ARCHITECTURE__
+#ifndef __ARCHITECTURE_HH__
+#define __ARCHITECTURE_HH__
 
 #include "capability.hh"
 #include "varmap.hh"
@@ -34,6 +34,8 @@
 #include "transform.hh"
 #include "prefersplit.hh"
 
+namespace ghidra {
+
 #ifdef CPUI_STATISTICS
 /// \brief Class for collecting statistics while processing over multiple functions
 ///
@@ -397,4 +399,5 @@ inline bool Architecture::highPtrPossible(const Address &loc,int4 size) const {
   return !nohighptr.inRange(loc,size);
 }
 
+} // End namespace ghidra
 #endif