Re: [Boost-users] thread-safe boost::random_device / boost:mt19937

Subject: Re: [Boost-users] thread-safe boost::random_device / boost:mt19937
From: Philipp Kraus (philipp.kraus_at_[hidden])
Date: 2012-12-27 09:25:44

On 2012-12-24 18:20:06 +0100, Brian Budge said:

> On Thu, Dec 20, 2012 at 8:26 AM, Philipp Kraus
> 
> If possible, can you construct an object per thread?

I don't know, because I call the Boost random calls from a Lua script
and initialize the boost random object with a static member globally
over all threads (and MPI cores).

> This is
> typically the way that I have used these wrappers (and actually the
> reason for writing them).   If you need a specific sequence, it might
> make sense to generate many random numbers up-front, and then use them
> in the thread.  If all else fails, you can use your own boost::mutex
> and boost::lock_guard to ensure thread safety.

At the moment I think a own object on each thread is a good choice, but
I must change same design structures, so a mutex is a faster way to solve
it

Phil