[Webkit-unassigned] [Bug 151387] New: [WinCairo][MediaFoundation] The main thread can sometimes be blocked forever when ending a media session.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=151387

            Bug ID: 151387
           Summary: [WinCairo][MediaFoundation] The main thread can
                    sometimes be blocked forever when ending a media
                    session.
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: peavo at outlook.com

This happens because the main thread is waiting for the sample scheduler thread to finish, but sometimes it never does.
This can be resolved by emptying the scheduler's sample queue before requesting the scheduler thread to finish.
This will make sure the scheduler thread returns to it's main loop quickly, and can handle the termination request.

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