Skip to content

[CS0420] ActorCell Warning Disable #6683

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 7 commits into from
May 4, 2023
Merged
Changes from 4 commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 2 additions & 0 deletions src/core/Akka/Actor/ActorCell.cs
Original file line number Diff line number Diff line change
Expand Up @@ -91,7 +91,9 @@ public ActorCell(ActorSystemImpl system, IInternalActorRef self, Props props, Me
/// <summary>
/// TBD
/// </summary>
#pragma warning disable CS0420 // A reference to a volatile field will not be treated as volatile
public Mailbox Mailbox => Volatile.Read(ref _mailboxDoNotCallMeDirectly);
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

We should probably remove the Volatile.Read call - since the field is already volatile.

#pragma warning restore CS0420 // A reference to a volatile field will not be treated as volatile
Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

  1. A volatile field should not normally be passed using a ref or out parameter, since it will not be treated as volatile within the scope of the function. There are exceptions to this, such as when calling an interlocked API. As with any warning, you may use the [#pragma warning](https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/preprocessor-directives#pragma-warning) to disable this warning in those rare cases where you are intentionally using a volatile field as a reference parameter. https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/compiler-messages/cs0420?f1url=%3FappId%3Droslyn%26k%3Dk(CS0420)

  2. public Mailbox Mailbox => _mailboxDoNotCallMeDirectly;


/// <summary>
/// TBD
Expand Down