|Fat references email@example.com (Jon Harrop) (2009-12-29)|
|Re: Fat references firstname.lastname@example.org (Paul Biggar) (2009-12-30)|
|Re: Fat references bobduff@shell01.TheWorld.com (Robert A Duff) (2009-12-30)|
|Re: Fat references email@example.com (BGB / cr88192) (2009-12-30)|
|Re: Fat references firstname.lastname@example.org (glen herrmannsfeldt) (2009-12-30)|
|Re: Fat references email@example.com (Jon Harrop) (2009-12-30)|
|Re: Fat references firstname.lastname@example.org (Kaz Kylheku) (2009-12-30)|
|[29 later articles]|
|From:||Jon Harrop <email@example.com>|
|Date:||Tue, 29 Dec 2009 17:55:59 +0000|
|Organization:||Flying Frog Consultancy Ltd.|
|Posted-Date:||30 Dec 2009 02:05:12 EST|
I've been working on a project called HLVM in my spare time:
One goal was to have fast interop with C, so I didn't want to copy the
traditional style of placing a header with GC metadata before every value
in the heap because that would require C arrays to be copied just to add
this header. I couldn't be bothered to allocate a separate header so,
instead, I pulled the GC metadata into the reference. So my references are
now "fat": a quadword of pointer to run-time type, array length or union
type tag, pointer to mark state and pointer to the actual data itself.
This actually works rather well except I sacrificed atomic read/write of
references. Has it been done before?
Dr Jon D Harrop, Flying Frog Consultancy Ltd.
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