On Thu, 5 Jan 2023 11:47:56 GMT, Yi Yang <yy...@openjdk.org> wrote:

>> Looks like Windows needs a long fd so the shared API takes long and we then 
>> cast to int for the Unix native methods. A little messy but fixable.
>
>> If you add read/close methods for Windows that then call readPipe/closePipe, 
>> then we don't need to subclass and override.
> 
> Sorry, I don't understand what this means. VirtualMachineImpl is 
> platform-dependent while HotSpotVirtualMachine is shared, we always need to 
> sub-class socket input stream in order to call platform-depend read/close.

As long as all the platform-specific `VirtualMachineImpl` classes define a 
`read` and `close` method then we can simply have the shared socket stream 
class call those methods. Windows will need an extra level of indirection 
because its `read` method will have to call `readPipe`.

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PR: https://git.openjdk.org/jdk/pull/11823

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