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using System;
using System.Reflection;
using System.Reflection.Emit;
using System.Threading;
namespace Python.Runtime
{
/// <summary>
/// Several places in the runtime generate code on the fly to support
/// dynamic functionality. The CodeGenerator class manages the dynamic
/// assembly used for code generation and provides utility methods for
/// certain repetitive tasks.
/// </summary>
internal class CodeGenerator
{
private AssemblyBuilder _aBuilder = null;
private AssemblyBuilder aBuilder
{
get
{
if (_aBuilder == null)
{
var aname = new AssemblyName { Name = "__CodeGenerator_Assembly" };
var aa = AssemblyBuilderAccess.Run;
_aBuilder = Thread.GetDomain().DefineDynamicAssembly(aname, aa);
}
return _aBuilder;
}
}
private ModuleBuilder _mBuilder = null;
private ModuleBuilder mBuilder
{
get
{
if (_mBuilder == null)
{
_mBuilder = aBuilder.DefineDynamicModule("__CodeGenerator_Module");
}
return _mBuilder;
}
}
internal CodeGenerator()
{
}
/// <summary>
/// DefineType is a shortcut utility to get a new TypeBuilder.
/// </summary>
internal TypeBuilder DefineType(string name)
{
var attrs = TypeAttributes.Public;
return mBuilder.DefineType(name, attrs);
}
/// <summary>
/// DefineType is a shortcut utility to get a new TypeBuilder.
/// </summary>
internal TypeBuilder DefineType(string name, Type basetype)
{
var attrs = TypeAttributes.Public;
return mBuilder.DefineType(name, attrs, basetype);
}
}
}