Hello everyone. I want to write a reflection library for a plugin-based game engine. Let's say I have a launcher that loads a number of dlls\sos. Obviously, the problem is that for every binary reflection database storage is different. How it it possible to define a "single static global point like in c++
" in rust?
I load plugins through libloading crate. And a plugin calls a macro which refers to a static database variable of the reflection lib(I know it is unsafe, but it will be called only on a main thread)
registration will be issued through ctor - Rust crate
Could you provide example C++ code of what you need?
If it helps, you can define an extern static variable in Rust and use it in much the same way that you would in C++.
Example from c++:
database.cpp
namespace
{
size_t g_globalCounter = 0;
}
size_t increment()
{
return g_globalCounter++;
}
database.hpp
#pragma once
DLL_API size_t increment();
DLL_API is a _declspec(dllexport\import) stuff
Now, if I link it as dll to my main binary and I link it as dll to my plugins, this "database" state will be the same across dll so\dll boundaries
How would I achieve a similar functionality in rust?
Maybe there is a way to create a singleton,which will be unique across shared objects?
You can put the global in a separate dylib that you depend on from all other dylibs.
Thanks everyone. Seems like the issue was that at some point I was not using prefer-dynamic and thought static in dylib is different for every lib
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