[vbox-dev] host calling into vm for async I/O?

Sander van Leeuwen Sander.Vanleeuwen at Sun.COM
Tue Jul 15 07:54:39 GMT 2008

There's is no such reversed callback mechanism for HGCM. You'd either 
have to poll or make a guest thread block in a wait for directory change 
HGCM call. The latter
is not that easy as an HGCM client is single threaded.


Huihong Luo wrote:
> Are there any APIs that can invoke vm's functions from host (opposite 
> to VbglHGCMCall which does vm to host calls)?
> I am trying to implement directory change notification features on 
> windows shared folders. Basically, when files change in a host folder, 
> I want the host to invoke a callback function inside vm.
> Thanks,
> Huihong
> ------------------------------------------------------------------------
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Kind regards / Mit freundlichen Gruessen / Met vriendelijke groet


Sun Microsystems GmbH        Sander van Leeuwen
Werkstrasse 24               Senior Staff Engineer, VirtualBox
71384 Weinstadt, Germany     mailto:Sander.Vanleeuwen at sun.com

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