Can't call `dmlab_connect` more than once in a process, disabling multithreading
ava6969 opened this issue · comments
I am building a c++ drl lib, And i need to make my lib support dmlab env, all my other environments run with multithreading but i cant use the regular header file, it says dmlab connect can only be called once per process.
I tried something that seemed to work currently, but i haven't tested if they are all unique environments yet. I'll love to hear what you suggest tho.
Please take a look at https://github.com/deepmind/lab/blob/master/public/dmlab_so_loader.cc, which is a wrapper around the single-instance dmlab_connect that does the following: The main dmlab code is linked into a shared object (DSO), and every time you create a new instance via the DSO loader, it makes a physical copy of the DSO, and opens that unique copy with dlopen. That allows you to instantiate Lab repeatedly, and the different DSOs are effectively isolated from one another.
That's how the Python module is implemented, for example.
awesome, thats what i did, Thanks. Just wanted to confirm.