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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 System.Diagnostics;
using System.Text;
using ILCompiler.DependencyAnalysisFramework;
using Internal.TypeSystem;
namespace ILCompiler.DependencyAnalysis
{
public interface IHasStartSymbol
{
ObjectAndOffsetSymbolNode StartSymbol { get; }
}
/// <summary>
/// Represents an array of <typeparamref name="TEmbedded"/> nodes. The contents of this node will be emitted
/// by placing a starting symbol, followed by contents of <typeparamref name="TEmbedded"/> nodes (optionally
/// sorted using provided comparer), followed by ending symbol.
/// </summary>
public class ArrayOfEmbeddedDataNode<TEmbedded> : EmbeddedDataContainerNode, IHasStartSymbol
where TEmbedded : EmbeddedObjectNode
{
private HashSet<TEmbedded> _nestedNodes = new HashSet<TEmbedded>();
private List<TEmbedded> _nestedNodesList = new List<TEmbedded>();
private IComparer<TEmbedded> _sorter;
public ArrayOfEmbeddedDataNode(string startSymbolMangledName, string endSymbolMangledName, IComparer<TEmbedded> nodeSorter) : base(startSymbolMangledName, endSymbolMangledName)
{
_sorter = nodeSorter;
}
public void AddEmbeddedObject(TEmbedded symbol)
{
lock (_nestedNodes)
{
if (_nestedNodes.Add(symbol))
{
_nestedNodesList.Add(symbol);
}
symbol.ContainingNode = this;
}
}
protected override string GetName(NodeFactory factory) => $"Region {StartSymbol.GetMangledName(factory.NameMangler)}";
public override ObjectNodeSection Section => ObjectNodeSection.DataSection;
public override bool IsShareable => false;
public override bool StaticDependenciesAreComputed => true;
protected IEnumerable<TEmbedded> NodesList => _nestedNodesList;
protected virtual void GetElementDataForNodes(ref ObjectDataBuilder builder, NodeFactory factory, bool relocsOnly)
{
int index = 0;
foreach (TEmbedded node in NodesList)
{
if (!relocsOnly)
{
node.InitializeOffsetFromBeginningOfArray(builder.CountBytes);
node.InitializeIndexFromBeginningOfArray(index++);
}
node.EncodeData(ref builder, factory, relocsOnly);
if (node is ISymbolDefinitionNode)
{
builder.AddSymbol((ISymbolDefinitionNode)node);
}
}
}
public override ObjectData GetData(NodeFactory factory, bool relocsOnly)
{
ObjectDataBuilder builder = new ObjectDataBuilder(factory, relocsOnly);
builder.RequireInitialPointerAlignment();
if (_sorter != null)
_nestedNodesList.Sort(_sorter);
builder.AddSymbol(StartSymbol);
GetElementDataForNodes(ref builder, factory, relocsOnly);
EndSymbol.SetSymbolOffset(builder.CountBytes);
builder.AddSymbol(EndSymbol);
ObjectData objData = builder.ToObjectData();
return objData;
}
public override bool ShouldSkipEmittingObjectNode(NodeFactory factory)
{
return _nestedNodesList.Count == 0;
}
protected override DependencyList ComputeNonRelocationBasedDependencies(NodeFactory factory)
{
DependencyList dependencies = new DependencyList();
dependencies.Add(StartSymbol, "StartSymbol");
dependencies.Add(EndSymbol, "EndSymbol");
return dependencies;
}
protected internal override int Phase => (int)ObjectNodePhase.Ordered;
public override int ClassCode => (int)ObjectNodeOrder.ArrayOfEmbeddedDataNode;
}
}
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