don't create a new virtual machine for each script and frame

apps/openmw/mwgui/console.cpp

@@ -223,11 +223,11 @@ namespace MWGui
             try
             {
                 ConsoleInterpreterContext interpreterContext (*this, mEnvironment, MWWorld::Ptr());
-                Interpreter::Interpreter interpreter (interpreterContext);
+                Interpreter::Interpreter interpreter;
                 MWScript::installOpcodes (interpreter);
                 std::vector<Interpreter::Type_Code> code;
                 output.getCode (code);
-                interpreter.run (&code[0], code.size());
+                interpreter.run (&code[0], code.size(), interpreterContext);
             }
             catch (const std::exception& error)
             {

apps/openmw/mwscript/scriptmanager.cpp

@@ -12,8 +12,6 @@
 #include <components/compiler/scanner.hpp>
 #include <components/compiler/context.hpp>
 
-#include <components/interpreter/interpreter.hpp>
-
 #include "extensions.hpp"
 
 namespace MWScript
@@ -21,7 +19,8 @@ namespace MWScript
     ScriptManager::ScriptManager (const ESMS::ESMStore& store, bool verbose,
         Compiler::Context& compilerContext)
     : mErrorHandler (std::cerr), mStore (store), mVerbose (verbose),
-      mCompilerContext (compilerContext), mParser (mErrorHandler, mCompilerContext)
+      mCompilerContext (compilerContext), mParser (mErrorHandler, mCompilerContext),
+      mOpcodesInstalled (false)
     {}
 
     bool ScriptManager::compile (const std::string& name)
@@ -99,9 +98,13 @@ namespace MWScript
         if (!iter->second.empty())
             try
             {
-                Interpreter::Interpreter interpreter (interpreterContext);
-                installOpcodes (interpreter);
-                interpreter.run (&iter->second[0], iter->second.size());
+                if (!mOpcodesInstalled)
+                {
+                    installOpcodes (mInterpreter);
+                    mOpcodesInstalled = true;
+                }
+
+                mInterpreter.run (&iter->second[0], iter->second.size(), interpreterContext);
             }
             catch (const std::exception& e)
             {

apps/openmw/mwscript/scriptmanager.hpp

@@ -8,6 +8,7 @@
 #include <components/compiler/streamerrorhandler.hpp>
 #include <components/compiler/fileparser.hpp>
 
+#include <components/interpreter/interpreter.hpp>
 #include <components/interpreter/types.hpp>
 
 namespace ESMS
@@ -35,6 +36,8 @@ namespace MWScript
             bool mVerbose;
             Compiler::Context& mCompilerContext;
             Compiler::FileParser mParser;
+            Interpreter::Interpreter mInterpreter;
+            bool mOpcodesInstalled;
 
             std::map<std::string, std::vector<Interpreter::Type_Code> > mScripts;
 

components/interpreter/interpreter.cpp

@@ -134,8 +134,7 @@ namespace Interpreter
         throw std::runtime_error (error.str());
     }
 
-    Interpreter::Interpreter (Context& context)
-    : mRuntime (context)
+    Interpreter::Interpreter()
     {}
 
     Interpreter::~Interpreter()
@@ -195,11 +194,11 @@ namespace Interpreter
         mSegment5.insert (std::make_pair (code, opcode));
     }
 
-    void Interpreter::run (const Type_Code *code, int codeSize)
+    void Interpreter::run (const Type_Code *code, int codeSize, Context& context)
     {
         assert (codeSize>=4);
 
-        mRuntime.configure (code, codeSize);
+        mRuntime.configure (code, codeSize, context);
 
         int opcodes = static_cast<int> (code[0]);
 

components/interpreter/interpreter.hpp

@@ -34,7 +34,7 @@ namespace Interpreter
 
         public:
 
-            Interpreter (Context& context);
+            Interpreter();
 
             ~Interpreter();
 
@@ -56,9 +56,8 @@ namespace Interpreter
             void installSegment5 (int code, Opcode0 *opcode);
             ///< ownership of \a opcode is transferred to *this.
 
-            void run (const Type_Code *code, int codeSize);
+            void run (const Type_Code *code, int codeSize, Context& context);
     };
 }
 
 #endif
-

components/interpreter/runtime.cpp

@@ -7,7 +7,7 @@
 
 namespace Interpreter
 {
-    Runtime::Runtime (Context& context) : mContext (context), mCode (0), mPC (0) {}
+    Runtime::Runtime() : mContext (0), mCode (0), mPC (0) {}
 
     int Runtime::getPC() const
     {
@@ -47,10 +47,11 @@ namespace Interpreter
         return literalBlock;
     }
 
-    void Runtime::configure (const Interpreter::Type_Code *code, int codeSize)
+    void Runtime::configure (const Interpreter::Type_Code *code, int codeSize, Context& context)
     {
         clear();
 
+        mContext = &context;
         mCode = code;
         mCodeSize = codeSize;
         mPC = 0;
@@ -58,6 +59,7 @@ namespace Interpreter
 
     void Runtime::clear()
     {
+        mContext = 0;
         mCode = 0;
         mCodeSize = 0;
         mStack.clear();
@@ -105,7 +107,7 @@ namespace Interpreter
 
     Context& Runtime::getContext()
     {
-        return mContext;
+        assert (mContext);
+        return *mContext;
     }
 }
-

components/interpreter/runtime.hpp

@@ -14,7 +14,7 @@ namespace Interpreter
 
     class Runtime
     {
-            Context& mContext;
+            Context *mContext;
             const Type_Code *mCode;
             int mCodeSize;
             int mPC;
@@ -22,7 +22,7 @@ namespace Interpreter
 
         public:
 
-            Runtime (Context& context);
+            Runtime ();
 
             int getPC() const;
             ///< return program counter.
@@ -33,7 +33,7 @@ namespace Interpreter
 
             std::string getStringLiteral (int index) const;
 
-            void configure (const Type_Code *code, int codeSize);
+            void configure (const Type_Code *code, int codeSize, Context& context);
             ///< \a context and \a code must exist as least until either configure, clear or
             /// the destructor is called. \a codeSize is given in 32-bit words.