[Webkit-unassigned] [Bug 190902] New: [MSE][GStreamer] Introduce AbortableTaskQueue

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=190902

            Bug ID: 190902
           Summary: [MSE][GStreamer] Introduce AbortableTaskQueue
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: aboya at igalia.com

A new synchronization primitive is introduced: AbortableTaskQueue,
which allows to send work to the main thread from a background thread
with the option to perform two-phase cancellation.

Tests for AbortableTaskQueue are included.

This new primitive has been used to overhaul GstBus messaging in
AppendPipeline. A lot of code made redundant has been deleted in the
process and lots of internal functions were now able to be made
private.

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