8359923: Const accessors for the Deferred class

[jsikstro]

Hello,

This RFE adds const accessors to the Deferred class. We plan on using this in a future patch in ZGC. Thanks!

Testing:

• Currently running tier1-2
• Works in an WIP ZGC patch

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8359923: Const accessors for the Deferred class (Enhancement - P4)

Reviewers

• Johan Sjölen (@jdksjolen - Reviewer)

Reviewing

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[openjdk]

@jsikstro This change now passes all automated pre-integration checks.

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After integration, the commit message for the final commit will be:

8359923: Const accessors for the Deferred class

Reviewed-by: jsjolen

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[mlbridge]

Webrevs

• 00: Full (9a1b5cdf)

[jdksjolen]

LGTM and trivial

[jsikstro]

Thank you for the quick review @jdksjolen!
/integrate

[openjdk]

Going to push as commit 42d3604.
Since your change was applied there has been 1 commit pushed to the master branch:

• cf78925: 8358891: Remove the PerfDataSamplingIntervalFunc code

Your commit was automatically rebased without conflicts.

[openjdk]

@jsikstro Pushed as commit 42d3604.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.

[kimbarrett]

I've asked that this change be backed out. I don't think this change should
have been made. I've proposed a better solution for the use-case that led to
making this change.

[stefank]

I've asked that this change be backed out. I don't think this change should
have been made. I've proposed a better solution for the use-case that led to
making this change.

The name Deferred was chosen when we thought that we would be allowed to use this utility to defer initialization for more situations than just static objects. If we are going to lock this down to only use it for static objects, then I think we also should rename the utility accordingly.