[Vm-dev] Adding new primitives to FilePlugin
David T. Lewis
lewis at mail.msen.com
Fri Sep 23 12:40:19 UTC 2016
I suggest that you try this first by making your own plugin separate from FilePlugin.
If the idea proves useful in a general way, then consider adding it to FilePlugin.
FilePlugin is one of a small number of essential plugins that needs to be implemented
when bringing up a VM an a new platform, so it is generally a good idea to resist
the temptation to add features there.
>From your previous email regarding sqFileReadIntoAt(), I think that you have
already noticed some rather questionable features that have crept into this
plugin over the years ;-)
Dave
On Fri, Sep 23, 2016 at 10:40:15AM +0200, Holger Freyther wrote:
>
> Good Morning,
>
> with UFFI it is easy to call OS functions that return a filedescriptor (e.g. inotify, timerfd, kqueue) but it is then difficult to use it. Classes like AioEventHandler or AttachableFileStream need the fileID (SQFile) but currently there is no way to create a SQFile from a int/FILE*.
>
> I would like to propose two new primitives:
>
> >>#primitiveFileOpenUseFileDescriptor [1]
> >>#primitiveFileOpenUseFile [2]
>
> and the first implementation[3]. What does it take to get this into the FilePlugin?
>
> regards
> holger
>
>
>
> [1] https://github.com/zecke/pharo-vm/blob/dd74059acb55fc9e3da4756ff7a751adecce76e2/mc/VMMaker.oscog.package/FilePlugin.class/instance/primitiveFileOpenUseFileDescriptor.st
>
> [2] https://github.com/zecke/pharo-vm/blob/dd74059acb55fc9e3da4756ff7a751adecce76e2/mc/VMMaker.oscog.package/FilePlugin.class/instance/primitiveFileOpenUseFile.st
>
> [3] https://github.com/zecke/pharo-vm/commit/dd74059acb55fc9e3da4756ff7a751adecce76e2#diff-9bbe8b1dab4518d9de3cc7326295466bR296
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