ability to tell, how many instances of context exist

[borisbat]

let shared DLL : void? = null

[init]
def setup {
    if ( get_context_share_counter() == 1ul ) { // IF THIS ONE IS THE FIRST ONE
        unsafe {
            reinterpret<void?>(DLL) = reinterpret<void?>(0x12345678) // mock loading a DLL
        }
    }
}

[export]
def main {
    print("Hello, World!\n")
}

[finalize]
def done {
    if ( get_context_share_counter() == 1ul ) { // IF THIS ONE IS THE LAST ONE
        unsafe {
            reinterpret<void?>(DLL) = null // mock unloading a DLL
        }
    }
}