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v8 module: allow TypedArray and DataView #23953

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merged 1 commit into from
Oct 31, 2018
Merged

v8 module: allow TypedArray and DataView #23953

merged 1 commit into from
Oct 31, 2018

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oyyd
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@oyyd oyyd commented Oct 29, 2018

This commit allow passing TypedArray and DataView to:

  • v8.deserialize()
  • new v8.Deserializer()
  • v8.serializer.writeRawBytes()

Refs: #1826

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • tests and/or benchmarks are included
  • documentation is changed or added
  • commit message follows commit guidelines

@nodejs-github-bot nodejs-github-bot added the c++ Issues and PRs that require attention from people who are familiar with C++. label Oct 29, 2018
@oyyd oyyd mentioned this pull request Oct 29, 2018
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@jasnell jasnell added the semver-minor PRs that contain new features and should be released in the next minor version. label Oct 29, 2018
@vsemozhetbyt vsemozhetbyt added the v8 engine Issues and PRs related to the V8 dependency. label Oct 29, 2018
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CI: https://ci.nodejs.org/job/node-test-pull-request/18218/

refack
refack suggested changes Oct 29, 2018
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Nits made me ask a question about timing.

test/parallel/test-v8-serdes.js Outdated
const length = des.readUint32();
const buf = des.readRawBytes(length);

let length = des.readUint32();
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Please const

test/parallel/test-v8-serdes.js Outdated
assert.strictEqual(buf.toString(), 'hostObjectTag');
for (let i = 0; i < arrayBufferViewsLength; i += 1) {
length = des.readUint32();
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Could these be const length2 and const buf2 please?
Recycling variables should be avoided.

test/parallel/test-v8-serdes.js Outdated
// `v8.serializer.writeRawBytes()` should support both `TypedArray`
// and `DataView`.
const arrayBufferViews = common.getArrayBufferViews(buf);
arrayBufferViewsLength = arrayBufferViews.length;
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@refack refack Oct 29, 2018 •
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Could this be const arrayBufferViewsLength instead.
.
.
.
Which made be think isn't there a race here?
Is the callbacks guaranteed to be in order?
At minimum this should be documented in a comment

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@oyyd oyyd Oct 30, 2018 •
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Is the callbacks guaranteed to be in order?

Yes. We have only one HostObject so that the callback will be called only once.

I think v8.Serializer.writeRawBytes() being expected to be called inside of the callback of _writeHostObject makes the test a bit confusing. I'm going to refactor this.

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refack commented Oct 29, 2018

@oyyd as alway thank you for the contribution. While reviewing the code and looking at cases of variable recycling I found that I don't understand the operation order guarantee.
IMHO we should find a way to explicitly test for that, and document that.

refack
refack reviewed Oct 29, 2018
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test/parallel/test-v8-serdes.js Outdated
@@ -66,6 +66,7 @@ const deserializerTypeError =
}

{
let arrayBufferViewsLength;
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Maybe simplest solution is to add a sentinel:

  let has_writeHostObjectCalled = false;

the in _writeHostObject

  has_writeHostObjectCalled = true;

the first line of _readHostObject

  assert.ok(has_writeHostObjectCalled);

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@refack refack Oct 29, 2018 •
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or dual use arrayBufferViewsLength - initialise it to false, and then assert

  des._readHostObject = common.mustCall(() => {
    assert.notStrictEqual(false, arrayBufferViewsLength);
...

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oyyd commented Oct 30, 2018

@refack Thanks for your advice! Comments addressed.

I have separated the test for v8.Serializer.writeRawBytes() so that we can avoid recycling variables and the tests for TypedArray and DateView should be clearer. I have also added an assertion to ensure that _writeHostObject is called before _readHostObject.

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refack commented Oct 30, 2018

@refack Thanks for your advice! Comments addressed.

Looks 💯. Thank you for following up!

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refack commented Oct 30, 2018

CI: https://ci.nodejs.org/job/node-test-pull-request/18228/

@refack refack added the author ready PRs that have at least one approval, no pending requests for changes, and a CI started. label Oct 30, 2018
@oyyd @refack
lib: enable TypedArray and DataView for the v8 module
56881b0 
This commit allow passing `TypedArray` and `DataView` to:
- v8.deserialize()
- new v8.Deserializer()
- v8.serializer.writeRawBytes()

PR-URL: nodejs#23953
Refs: nodejs#1826
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Refael Ackermann <refack@gmail.com>
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refack commented Oct 31, 2018 •
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Landed in 56881b0 🎉

@refack refack removed the author ready PRs that have at least one approval, no pending requests for changes, and a CI started. label Oct 31, 2018
@refack refack merged commit 56881b0 into nodejs:master Oct 31, 2018
targos pushed a commit that referenced this pull request Nov 2, 2018
@oyyd @targos
lib: enable TypedArray and DataView for the v8 module
55adc25 
This commit allow passing `TypedArray` and `DataView` to:
- v8.deserialize()
- new v8.Deserializer()
- v8.serializer.writeRawBytes()

PR-URL: #23953
Refs: #1826
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Refael Ackermann <refack@gmail.com>
@BridgeAR BridgeAR mentioned this pull request Nov 14, 2018
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This was referenced Nov 15, 2018
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BethGriggs pushed a commit that referenced this pull request Apr 8, 2019
@oyyd @BethGriggs
lib: enable TypedArray and DataView for the v8 module
43f41be 
This commit allow passing `TypedArray` and `DataView` to:
- v8.deserialize()
- new v8.Deserializer()
- v8.serializer.writeRawBytes()

PR-URL: #23953
Refs: #1826
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Refael Ackermann <refack@gmail.com>
@BethGriggs BethGriggs mentioned this pull request May 1, 2019
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This was referenced May 29, 2019
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@refack refack refack approved these changes

@bnoordhuis bnoordhuis bnoordhuis approved these changes

@jasnell jasnell jasnell approved these changes

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@oyyd @vsemozhetbyt @refack @bnoordhuis @jasnell @nodejs-github-bot