[webkit-changes] [WebKit/WebKit] cfe5a3: [WTF] Distinguish SerialFunctionDispatcher that ar...

[Jean-Yves Avenard]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: cfe5a3b9ba53fba674b45ad476a8a5c8bbfaea95
      https://github.com/WebKit/WebKit/commit/cfe5a3b9ba53fba674b45ad476a8a5c8bbfaea95
  Author: Jean-Yves Avenard <jya at apple.com>
  Date:   2023-12-11 (Mon, 11 Dec 2023)

  Changed paths:
    M Source/WTF/wtf/FunctionDispatcher.h
    M Source/WTF/wtf/NativePromise.h
    M Source/WTF/wtf/RunLoop.h
    M Source/WTF/wtf/WorkQueue.cpp
    M Source/WTF/wtf/WorkQueue.h

  Log Message:
  -----------
  [WTF] Distinguish SerialFunctionDispatcher that are refcounted and guarantee that the function will be run.
https://bugs.webkit.org/show_bug.cgi?id=266199
rdar://119476929

Reviewed by Youenn Fablet.

A SerialFunctionDispatcher has an explicit lifetime, while most implementations
are ref-counted, their API contract do not guarantee that a dispatched function would
be run (such as a WorkerThread that can be stopped at any time).

To distinguish those, we create a RefCountedSerialFunctionDispatcher, that is both
refcounted and that has an API contract lifetime that matches its owner.

For now, only WorkQueue and RunLoop satisfy the requirement.

NativePromise is modified to take this type as the NativePromise API contract
requires that the settled method be called.

No change in observable behaviour.

* Source/WTF/wtf/FunctionDispatcher.h:
* Source/WTF/wtf/NativePromise.h:
* Source/WTF/wtf/RunLoop.h:
* Source/WTF/wtf/WorkQueue.cpp:
(WTF::WorkQueue::ref const):
(WTF::WorkQueue::deref const):
* Source/WTF/wtf/WorkQueue.h:

Canonical link: https://commits.webkit.org/271860@main