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// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
namespace WixToolset.Dnc.Host
{
using System;
using System.Reflection;
using System.Runtime.Loader;
public sealed class DnchostAssemblyLoadContext : AssemblyLoadContext
{
private readonly AssemblyDependencyResolver resolver;
public DnchostAssemblyLoadContext(string assemblyPath, bool isolateFromDefault)
: base(nameof(DnchostAssemblyLoadContext), isolateFromDefault)
{
this.resolver = new AssemblyDependencyResolver(assemblyPath);
if (!this.IsCollectible)
{
AssemblyLoadContext.Default.Resolving += this.ResolveAssembly;
AssemblyLoadContext.Default.ResolvingUnmanagedDll += this.ResolveUnmanagedDll;
}
}
private Assembly ResolveAssembly(AssemblyLoadContext defaultAlc, AssemblyName assemblyName)
{
var path = this.resolver.ResolveAssemblyToPath(assemblyName);
if (path != null)
{
var targetAlc = this.IsCollectible ? this : defaultAlc;
return targetAlc.LoadFromAssemblyPath(path);
}
return null;
}
private IntPtr ResolveUnmanagedDll(Assembly assembly, string unmanagedDllName)
{
var path = this.resolver.ResolveUnmanagedDllToPath(unmanagedDllName);
if (path != null)
{
return this.LoadUnmanagedDllFromPath(path);
}
return IntPtr.Zero;
}
protected override Assembly Load(AssemblyName assemblyName)
{
return this.ResolveAssembly(AssemblyLoadContext.Default, assemblyName);
}
protected override IntPtr LoadUnmanagedDll(string unmanagedDllName)
{
return this.ResolveUnmanagedDll(null, unmanagedDllName);
}
}
}
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