[Caml-list] Thread-private data in C stubs

[Andre Nathan <andre@digirati.com.br>]

Hello

I'm writing stubs to a C library uses pthreads and exposes two functions
to get and set thread-private data, getpriv(ctx) and setpriv(ctx, p)
where ctx is some opaque context object, and p is a void* pointer.

What's the best way to deal with this from the stub code, ie., how do I
avoid the thread-private data to be garbage collected when the OCaml
variable goes out of scope?

Since the library in question uses threads internally, this needs to be
a thread-safe solution.

Thanks in advance,
Andre