Bug 144907

Summary: [Streams API] Delegate ReadableStreamReader reference counting to ReadableStream
Product: WebKit Reporter: youenn fablet <youennf>
Component: WebCore Misc.Assignee: youenn fablet <youennf>
Status: RESOLVED FIXED    
Severity: Normal CC: benjamin, calvaris, commit-queue, darin
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
WIP
none
Patch
none
Patch none

Description youenn fablet 2015-05-12 02:35:36 PDT 
The current implementation handles reader and stream as related but independent entities.
This causes some complexity and some bugs to maintain their state and link correctly.
It might be simpler to adapt the ReadableStreamController link for the reader.
Comment 1 youenn fablet 2015-05-12 03:20:51 PDT 
Created attachment 252953 [details]
WIP
Comment 2 youenn fablet 2015-05-12 03:21:32 PDT 
(In reply to comment #1)
> Created attachment 252953 [details]
> WIP

WIP, does not contain moving closedpromise callback handling to ReadableStream, which would be the next logical step.
Comment 3 youenn fablet 2015-05-12 06:06:01 PDT 
Created attachment 252958 [details]
Patch
Comment 4 youenn fablet 2015-05-12 11:48:56 PDT 
Created attachment 252973 [details]
Patch
Comment 5 youenn fablet 2015-05-12 11:57:29 PDT 
Comment on attachment 252973 [details]
Patch

This patch improves style over the previous patch.

It shows the benefit of removing RefCounted from ReadableStreamReader.
This removes code and at the end, there should be no need for a ReadableStreamReader.cpp, just like ReadableStreamController.

There are two downsides though:
- The ReadableStream will not be released until all readers, including released readers, are collected by the JS engine.
- The ReadableStream currently needs to keep track of all released readers.

Overall I think that this is an improvement, so r?
Comment 6 WebKit Commit Bot 2015-05-17 11:44:45 PDT 
Comment on attachment 252973 [details]
Patch

Clearing flags on attachment: 252973

Committed r184444: <http://trac.webkit.org/changeset/184444>
Comment 7 WebKit Commit Bot 2015-05-17 11:44:49 PDT 
All reviewed patches have been landed.  Closing bug.