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Don't store references in Consumer #2173

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Don't store references in Consumer #2173

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60b21b0
Don't store references in Consumer.
timcassell Oct 27, 2022
df10294
Removed reference check as it's no longer necessary.
timcassell Oct 27, 2022
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15 changes: 4 additions & 11 deletions src/BenchmarkDotNet/Engines/Consumer.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -30,8 +30,6 @@ private static readonly HashSet<Type> SupportedTypes
private double doubleHolder;
private long longHolder;
private ulong ulongHolder;
private string stringHolder;
private object objectHolder;
private IntPtr ptrHolder;
private UIntPtr uptrHolder;

Expand Down Expand Up @@ -97,16 +95,16 @@ private static readonly HashSet<Type> SupportedTypes

[MethodImpl(MethodImplOptions.AggressiveInlining)]
[PublicAPI]
public void Consume(string stringValue) => Volatile.Write(ref stringHolder, stringValue);
public void Consume(string stringValue) => DeadCodeEliminationHelper.KeepAliveWithoutBoxing(stringValue);

[MethodImpl(MethodImplOptions.AggressiveInlining)]
[PublicAPI]
public void Consume(object objectValue) => Volatile.Write(ref objectHolder, objectValue);
public void Consume(object objectValue) => DeadCodeEliminationHelper.KeepAliveWithoutBoxing(objectValue);

[MethodImpl(MethodImplOptions.AggressiveInlining)]
[PublicAPI]
public void Consume<T>(T objectValue) where T : class // class constraint prevents from boxing structs
=> Volatile.Write(ref objectHolder, objectValue);
=> DeadCodeEliminationHelper.KeepAliveWithoutBoxing(objectValue);

[MethodImpl(MethodImplOptions.AggressiveInlining)]
public unsafe void Consume<T>(T* ptrValue) where T: unmanaged => Volatile.Write(ref ptrHolder, (IntPtr)ptrValue);
Expand Down Expand Up @@ -141,15 +139,10 @@ public void Consume<T>(in T value)
Volatile.Write(ref longHolder, (long)(object)value);
else if (typeof(T) == typeof(ulong))
Volatile.Write(ref ulongHolder, (ulong)(object)value);
else if (default(T) == null)
objectHolder = (object) value;
else
ValueTypesConsumer(value); // non-primitive value types
DeadCodeEliminationHelper.KeepAliveWithoutBoxingReadonly(value); // non-primitive and nullable value types
}

[MethodImpl(MethodImplOptions.NoInlining)]
private void ValueTypesConsumer<T>(in T _) { }

internal static bool IsConsumable(Type type)
=> SupportedTypes.Contains(type) || type.GetTypeInfo().IsClass || type.GetTypeInfo().IsInterface;

Expand Down