On 01/03/2018 11:10 PM, John Burton wrote:
In the language spec here :-
https://dlang.org/spec/garbage.html#pointers_and_gc
It refers to a distinction between pointers to garbage collected memory
and pointers that are not. In particular it says that with a non garbage
collected pointer you can do anything that is legal in C but with a
garbage collected pointer there are a lot of undefined behaviors if you
don't follow some restrictions.
My question is how do I tell if a pointer is "garbage collected" or not?
For example :-
* Do not store magic values into pointers, other than null.
So how do I tell if it's safe to do this for any individual pointer?
What makes a pointer "garbage collected"?
You cannot tell if a random pointer is owned by the GC or not.
If a piece of memory is allocated not by the GC in your own function,
that's fairly easy. You'll know about it thanks to calling e.g. malloc
versus new or .length.
