doc: update examples for context sensitivity#1013
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KevinEady wants to merge 1 commit intonodejs:mainfrom
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doc: update examples for context sensitivity#1013KevinEady wants to merge 1 commit intonodejs:mainfrom
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legendecas
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Jun 22, 2021
| constructor.SuppressDestruct(); | ||
| Napi::FunctionReference *constructor = new Napi::FunctionReference(); | ||
| *constructor = Napi::Persistent(func); | ||
| env.SetInstanceData(constructor); |
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A finalizer is required for this FunctionReference pointer right?
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Hi @legendecas ,
Good question... I was under the impression that the instance data would be deleted, so there would be no need for a Finalizer.
- In the case of multiple calls to
Example::Init, the previous instance data would be overwritten via most recent call toenv.SetInstanceData. https://github.com/nodejs/node/blob/d615aeb7583b15bb5a8d1ec666ea29b8c7377455/src/js_native_api_v8.cc#L3201-L3205 does this delete the data? - The final data would be
deleted on environment cleanup.
Is my understanding correct?
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Eh, IIUC, it's node-addon-api's default finalizer deleted the data pointer: https://github.com/nodejs/node-addon-api/blob/main/napi.h#L208. Not quite intuitive tho... So no finalizer is required here.
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The Delete you point out only deleting the RefBase structure allocated in Node.js core, which would invoke the finalizer provided by node-addon-api. (Update: no, the lines don't invoke finalizers as they are replacing existing instance data)
legendecas
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Landed as 627dbf3 |
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Fixes: nodejs#1011 PR-URL: nodejs#1013 Reviewed-By: Michael Dawson <midawson@redhat.com> Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
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Fixes: nodejs#1011 PR-URL: nodejs#1013 Reviewed-By: Michael Dawson <midawson@redhat.com> Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
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Fixes: nodejs/node-addon-api#1011 PR-URL: nodejs/node-addon-api#1013 Reviewed-By: Michael Dawson <midawson@redhat.com> Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
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Fixes: nodejs/node-addon-api#1011 PR-URL: nodejs/node-addon-api#1013 Reviewed-By: Michael Dawson <midawson@redhat.com> Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
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Fixes: nodejs/node-addon-api#1011 PR-URL: nodejs/node-addon-api#1013 Reviewed-By: Michael Dawson <midawson@redhat.com> Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
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Fixes: nodejs/node-addon-api#1011 PR-URL: nodejs/node-addon-api#1013 Reviewed-By: Michael Dawson <midawson@redhat.com> Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
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Closes: #1011