Thread-safety and lazy-initialization of libraries

[Sergey Protko via Digitalmars-d-learn]

For some research i decided to write small high-level binding for 
libmpg123.

The question is how to write thread-safe lazy-initialization of 
library.

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.

Is there any proper way to do on-demand lazy-initialization of 
used library, which will be also thread-safe? How do i need to 
handle cases where some methods, which requires library to be 
initialized, called from different threads at the same time?

Thanks for your answers.