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Move parts of WeakReference to shared partition (#24800)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| // 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. | ||
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| using System.Runtime.Serialization; | ||
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| namespace System | ||
| { | ||
| [Serializable] | ||
| [System.Runtime.CompilerServices.TypeForwardedFrom("mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")] | ||
| public partial class WeakReference : ISerializable | ||
| { | ||
| // If you fix bugs here, please fix them in WeakReference<T> at the same time. | ||
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| // Creates a new WeakReference that keeps track of target. | ||
| // Assumes a Short Weak Reference (ie TrackResurrection is false.) | ||
| // | ||
| public WeakReference(object? target) | ||
| : this(target, false) | ||
| { | ||
| } | ||
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| public WeakReference(object? target, bool trackResurrection) | ||
| { | ||
| Create(target, trackResurrection); | ||
| } | ||
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| protected WeakReference(SerializationInfo info, StreamingContext context) | ||
| { | ||
| if (info == null) | ||
| { | ||
| throw new ArgumentNullException(nameof(info)); | ||
| } | ||
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| object? target = info.GetValue("TrackedObject", typeof(object)); // Do not rename (binary serialization) | ||
| bool trackResurrection = info.GetBoolean("TrackResurrection"); // Do not rename (binary serialization) | ||
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| Create(target, trackResurrection); | ||
| } | ||
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| public virtual void GetObjectData(SerializationInfo info, StreamingContext context) | ||
| { | ||
| if (info == null) | ||
| { | ||
| throw new ArgumentNullException(nameof(info)); | ||
| } | ||
| info.AddValue("TrackedObject", Target, typeof(object)); // Do not rename (binary serialization) | ||
| info.AddValue("TrackResurrection", IsTrackResurrection()); // Do not rename (binary serialization) | ||
| } | ||
| } | ||
| } |
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45 changes: 45 additions & 0 deletions
45
src/System.Private.CoreLib/src/System/WeakReference.T.CoreCLR.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| // 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. | ||
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| using System.Runtime.Serialization; | ||
| using System.Runtime.CompilerServices; | ||
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| namespace System | ||
| { | ||
| public sealed partial class WeakReference<T> : ISerializable | ||
| where T : class? | ||
| { | ||
| // This field is not a regular GC handle. It can have a special values that are used to prevent a race condition between setting the target and finalization. | ||
| internal IntPtr m_handle; | ||
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| public void SetTarget(T target) | ||
| { | ||
| this.Target = target; | ||
| } | ||
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| // This is property for better debugging experience (VS debugger shows values of properties when you hover over the variables) | ||
| private extern T Target | ||
| { | ||
| [MethodImplAttribute(MethodImplOptions.InternalCall)] | ||
| get; | ||
| [MethodImplAttribute(MethodImplOptions.InternalCall)] | ||
| set; | ||
| } | ||
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| // Free all system resources associated with this reference. | ||
| // | ||
| // Note: The WeakReference<T> finalizer is not usually run, but | ||
| // treated specially in gc.cpp's ScanForFinalization | ||
| // This is needed for subclasses deriving from WeakReference<T>, however. | ||
| // Additionally, there may be some cases during shutdown when we run this finalizer. | ||
| [MethodImplAttribute(MethodImplOptions.InternalCall)] | ||
| extern ~WeakReference(); | ||
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| [MethodImplAttribute(MethodImplOptions.InternalCall)] | ||
| private extern void Create(T target, bool trackResurrection); | ||
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| [MethodImplAttribute(MethodImplOptions.InternalCall)] | ||
| private extern bool IsTrackResurrection(); | ||
| } | ||
| } |