Tim, Thanks for the response.
How can I determine whether my structure (a composite type) is a contiguous
block of memory? The composite type has a few fields. One of the fields has
type Array{Array{Uint16,1},1} and another has type
Array{Array{Float64,2},1}. Am I out of luck?
What does it mean to reinterpret a composite type as a
SharedArray{Uint8,1}? Is that something like casting?
On Tuesday, May 6, 2014 7:32:47 PM UTC-7, Tim Holy wrote:
>
> If your structure is a contiguous block of memory, you could presumably
> use a
> SharedArray{Uint8,1} and then reinterpret it as your custom object. But if
> you
> want independently garbage-collectable constituents, this is not likely to
> be
> feasible.
>
> --Tim
>
> On Tuesday, May 06, 2014 03:03:01 PM Bob Quazar wrote:
> > In Julia, is it possible to share read-only data structures between
> > threads/processes running on different processors, without making a copy
> of
> > the entire data structure for each thread? The data structure I need to
> > share isn't of "bit type", so I can't use a SharedArray. And each worker
> > needs to read random parts from the full data structure, so I can't use
> a
> > distributed array. I also tried just putting "@parallel" before a for
> loop,
> > whose body accesses the data structure I want to share, but I believe
> the
> > whole data structure gets copied at each iteration. (I could be wrong
> about
> > that, but it's certainly very slow.) Does Julia have some alternative to
> a
> > copy-on-write for sharing data between threads?
> >
> > Thanks in advance!
> >
> > --Bob
>
