Marco Leise via Digitalmars-d
2014-10-15 05:04:06 UTC
immutable if we don't plan to swap out the handle and the ref
count is in some external data structure and only accessed
in ctors/dtors of the struct ?
It would look quite a bit like some sort of head immutable,
but with no access to the mutable parts.
The motivation is that immutable is inherently shared, so it
simplifies code where a file handle might be used by several
threads but synchronization is ensured by the operating system
or at a higher level in our code.
(Otherwise one would have to reimplement read, write,
handle, ... with the exact same code, but `shared` attached or
cast away `shared`, which is wrong.)