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// Licensed to the .NET Foundation under one or more agreements.

// The .NET Foundation licenses this file to you under the Apache 2.0 License.

// See the LICENSE file in the project root for more information.

using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Threading;

using Microsoft.Scripting;

using Microsoft.Scripting.Runtime;

using Microsoft.Scripting.Utils;

using IronPython.Runtime;

using IronPython.Runtime.Operations;

namespace IronPython.Compiler {

internal abstract class RunnableScriptCode : ScriptCode {

internal FunctionCode _code;

private readonly Compiler.Ast.PythonAst _ast;

public RunnableScriptCode(Compiler.Ast.PythonAst ast)

: base(ast.SourceUnit) {

_ast = ast;

}

public override object Run() {

return base.Run();

}

public override object Run(Scope scope) {

throw new NotImplementedException();

}

protected static CodeContext/*!*/ CreateTopLevelCodeContext(PythonDictionary/*!*/ dict, LanguageContext/*!*/ context) {

ModuleContext modContext = new ModuleContext(dict, (PythonContext)context);

return modContext.GlobalContext;

}

protected static CodeContext GetContextForScope(Scope scope, SourceUnit sourceUnit) {

if (!(scope.GetExtension(sourceUnit.LanguageContext.ContextId) is PythonScopeExtension ext)) {

ext = sourceUnit.LanguageContext.EnsureScopeExtension(scope) as PythonScopeExtension;

}

CodeContext ctx = ext.ModuleContext.GlobalContext;

return ctx;

}

protected FunctionCode EnsureFunctionCode(Delegate/*!*/ dlg) {

return EnsureFunctionCode(dlg, false, true);

}

protected FunctionCode EnsureFunctionCode(Delegate/*!*/ dlg, bool tracing, bool register) {

Debug.Assert(dlg != null);

if (_code == null) {

Interlocked.CompareExchange(

ref _code,

new FunctionCode(

(PythonContext)SourceUnit.LanguageContext,

dlg,

_ast,

_ast.GetDocumentation(_ast),

tracing,

register

),

null

);

}

return _code;

}

public Compiler.Ast.PythonAst Ast {

get {

return _ast;

}

}

public FunctionCode Code {

get {

return _code;

}

}

public abstract FunctionCode GetFunctionCode(bool register);

protected void PushFrame(CodeContext context, FunctionCode code) {

if (((PythonContext)SourceUnit.LanguageContext).PythonOptions.Frames) {

PythonOps.PushFrame(context, code);

}

}

protected void PopFrame() {

if (((PythonContext)SourceUnit.LanguageContext).PythonOptions.Frames) {

List<FunctionStack> stack = PythonOps.GetFunctionStack();

stack.RemoveAt(stack.Count - 1);

}

}

}

}