Am 02.04.2014 17:57, schrieb Andrea Fontana:
On Wednesday, 2 April 2014 at 15:53:52 UTC, Jacob Carlborg wrote:
On 2014-04-02 17:45, Andrea Fontana wrote:
auto example(char* test) { return toStringz(to!string(test) ~ "
world!"); }
When that return string will be freed?
When there is no reference left to the string, the garbage collector
is free to collect it when it chooses to.
That's expected.
What about:
extern(C) auto example(....)
Same as above, extern(C) does not change how memory is collected. If
it is a C function, then it depends entirely on that particular function.
I mean: if it is an exported function (of a shared library) what
happens? There's no reference kept anywhere (in D). So if I'm right it
could be freed immediatly by GC. Right?
If you pass that string to a C function, there is a reference on the
stack. So this string will not be freed until that C-function returns.
If that C-Function returns, it is very likely however that this was the
only reference and the string will be freed the next time the garbage
collector runs.
Kind Regards
Benjamin Thaut
