Re: [boost] [future|interprocess] Could futures live in shared memory and synchronize process?

Subject: Re: [boost] [future|interprocess] Could futures live in shared memory and synchronize process?
From: Ion Gaztañaga (igaztanaga_at_[hidden])
Date: 2009-02-18 12:19:25

Frank Mori Hess wrote:
> If you were implementing an interprocess future that only supported POD types, 
> wouldn't the POD object used for the future's value just sit in the shared 
> memory?  The future wouldn't need any pids.  It just needs a shared_ptr, 
> mutex, and condition, all of which are provided by interprocess, aren't they?

That was the case I was referring to. I was talking a bout shared future 
objects not shared data. Of course, the correct way to implement a 
process-future would be to share data. But could not pass the future 
object (which lives in the process that called spawn) to any other 
process, something that you can do with threads (the thread that waits 
for completion does not need to be the thread that created the future).

And we will need to to create a shared memory that goes away when a 
process dies (which is not true for POSIX systems). In theory, it could 
be possible, but it has some rough edges.

Regards,

Ion