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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;
using System.Collections.Generic;
using Internal.Text;
namespace ILCompiler.DependencyAnalysis
{
/// <summary>
/// Represents an array of pointers to symbols. <typeparamref name="TTarget"/> is the type
/// of node each pointer within the vector points to.
/// </summary>
public sealed class ArrayOfEmbeddedPointersNode<TTarget> : ArrayOfEmbeddedDataNode<EmbeddedPointerIndirectionNode<TTarget>>
where TTarget : ISortableSymbolNode
{
private int _nextId;
private string _startSymbolMangledName;
/// <summary>
/// Provides a callback mechanism for notification when an EmbeddedPointerIndirectionNode is marked and added to the
/// parent ArrayOfEmbeddedPointersNode's internal list
/// </summary>
public delegate void OnMarkedDelegate(EmbeddedPointerIndirectionNode<TTarget> embeddedObject);
public ArrayOfEmbeddedPointersNode(string startSymbolMangledName, string endSymbolMangledName, IComparer<TTarget> nodeSorter)
: base(
startSymbolMangledName,
endSymbolMangledName,
nodeSorter != null ? new PointerIndirectionNodeComparer(nodeSorter) : null)
{
_startSymbolMangledName = startSymbolMangledName;
}
public EmbeddedObjectNode NewNode(TTarget target)
{
return new SimpleEmbeddedPointerIndirectionNode(this, target);
}
public EmbeddedObjectNode NewNodeWithSymbol(TTarget target)
{
return new EmbeddedPointerIndirectionWithSymbolNode(this, target, GetNextId());
}
int GetNextId()
{
return System.Threading.Interlocked.Increment(ref _nextId);
}
protected internal override int Phase => (int)ObjectNodePhase.Ordered;
public override int ClassCode => (int)ObjectNodeOrder.ArrayOfEmbeddedPointersNode;
private class PointerIndirectionNodeComparer : IComparer<EmbeddedPointerIndirectionNode<TTarget>>
{
private IComparer<TTarget> _innerComparer;
public PointerIndirectionNodeComparer(IComparer<TTarget> innerComparer)
{
_innerComparer = innerComparer;
}
public int Compare(EmbeddedPointerIndirectionNode<TTarget> x, EmbeddedPointerIndirectionNode<TTarget> y)
{
return _innerComparer.Compare(x.Target, y.Target);
}
}
private class SimpleEmbeddedPointerIndirectionNode : EmbeddedPointerIndirectionNode<TTarget>
{
protected ArrayOfEmbeddedPointersNode<TTarget> _parentNode;
public SimpleEmbeddedPointerIndirectionNode(ArrayOfEmbeddedPointersNode<TTarget> futureParent, TTarget target)
: base(target)
{
_parentNode = futureParent;
}
protected override string GetName(NodeFactory factory) => $"Embedded pointer to {Target.GetMangledName(factory.NameMangler)}";
protected override void OnMarked(NodeFactory factory)
{
// We don't want the child in the parent collection unless it's necessary.
// Only when this node gets marked, the parent node becomes the actual parent.
_parentNode.AddEmbeddedObject(this);
}
public override IEnumerable<DependencyListEntry> GetStaticDependencies(NodeFactory factory)
{
return new[]
{
new DependencyListEntry(Target, "reloc"),
new DependencyListEntry(_parentNode, "Pointer region")
};
}
public override int ClassCode => -66002498;
}
private class EmbeddedPointerIndirectionWithSymbolNode : SimpleEmbeddedPointerIndirectionNode, ISymbolDefinitionNode
{
private int _id;
public EmbeddedPointerIndirectionWithSymbolNode(ArrayOfEmbeddedPointersNode<TTarget> futureParent, TTarget target, int id)
: base(futureParent, target)
{
_id = id;
}
int ISymbolNode.Offset => 0;
int ISymbolDefinitionNode.Offset => OffsetFromBeginningOfArray;
public override void AppendMangledName(NameMangler nameMangler, Utf8StringBuilder sb)
{
sb.Append(nameMangler.CompilationUnitPrefix).Append(_parentNode._startSymbolMangledName).Append("_").Append(_id.ToStringInvariant());
}
}
}
}
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