Thread-safety and lazy-initialization of libraries

[Sergey Protko via Digitalmars-d-learn]

On Monday, 30 June 2014 at 21:05:32 UTC, bearophile wrote:
> Sergey Protko:
>
>> libmpg123 has mpg123_init and mpg123_exit functions, which are 
>> not thread-safe, so we should to call them only once per 
>> process. Most of useful libraries also has such stuff. But 
>> manual initialization is killing all beauty of high-level 
>> bindings.
>
> I think module "static this" is thread-local, so in theory you 
> can use that. But I don't know if it's a good idea to perform 
> heavy computations inside those module static this.
>
> Bye,
> bearophile

I thought about this. But static constructors doesn't solve 
problem with on-demand initialization in case, where there is 
several classes. For example Decoder and Encoder both requires 
library to be initialized before they are actually be used.