[Webkit-unassigned] [Bug 229171] New: Add thread safe WeakPtr

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=229171

            Bug ID: 229171
           Summary: Add thread safe WeakPtr
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Template Framework
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rniwa at webkit.org

We need a thread safe version of WeakPtr.

It's not sufficient to make CanMakeThreadSafe thread safe for WeakPtr
since the object can be destructed as we grab the value out of WeakPtr.

Add a mechanism to safely create RefPtr or CheckedPtr out of them.

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