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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Collections.Generic;
using Internal.TypeSystem;
using Debug = System.Diagnostics.Debug;
namespace ILCompiler
{
/// <summary>
/// Encapsulates a list of class constructors that must be run in a prescribed order during start-up
/// </summary>
public sealed class LibraryInitializers
{
private const string LibraryInitializerContainerNamespaceName = "Internal.Runtime.CompilerHelpers";
private const string LibraryInitializerContainerTypeName = "LibraryInitializer";
private const string LibraryInitializerMethodName = "InitializeLibrary";
private List<MethodDesc> _libraryInitializerMethods;
private readonly TypeSystemContext _context;
private IReadOnlyCollection<ModuleDesc> _librariesWithInitializers;
public LibraryInitializers(TypeSystemContext context, IEnumerable<ModuleDesc> librariesWithInitalizers)
{
_context = context;
_librariesWithInitializers = new List<ModuleDesc>(librariesWithInitalizers);
}
public IReadOnlyCollection<MethodDesc> LibraryInitializerMethods
{
get
{
if (_libraryInitializerMethods == null)
InitLibraryInitializers();
return _libraryInitializerMethods;
}
}
private void InitLibraryInitializers()
{
Debug.Assert(_libraryInitializerMethods == null);
_libraryInitializerMethods = new List<MethodDesc>();
foreach (var assembly in _librariesWithInitializers)
{
TypeDesc containingType = assembly.GetType(LibraryInitializerContainerNamespaceName, LibraryInitializerContainerTypeName, false);
if (containingType == null)
continue;
MethodDesc initializerMethod = containingType.GetMethod(LibraryInitializerMethodName, null);
if (initializerMethod == null)
continue;
_libraryInitializerMethods.Add(initializerMethod);
}
}
}
}
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