On Thursday, 12 September 2013 at 05:59:33 UTC, monarch_dodra
wrote:
On Thursday, 12 September 2013 at 05:36:31 UTC, Alexandr
Druzhinin wrote:
Some C function malloc-ed memory. This memory should be freeed
much later. I don't want to manually call C function to free
this memory in some point later, so may I in some way ask gc
to free this memory using something like addRoot(for instance)
or else or the true way is to copy malloc-ed memory to
gc-allocated memory and free malloc-ed memory at once? Like:
ubyte data* = cfunction_allocates_memory();
auto gcmemory = data[0..length(data)];
cfunction_frees_memory(data);
// work with gcmemory only
or
ubyte data* = cfunction_allocates_memory();
GC.someUnknownToMeFunction(data); // now gc will control this
memory
No.
Only free can be used with malloc. The memory comes from
distinct pools.
Another option could be to use "GC.malloc", and memcpy your old
mmory into your new memory, free the old memory, and use your
new block. GC.malloc, as the name suggests, is a malloc, but
done by the GC.
You could also use some kind of helper class. Perhaps Phobos has
a facility for this, but to illustrate the idea:
http://dpaste.dzfl.pl/805a61c0
However note that the memory isn't guaranteed to be freed this
way. Only if the GC heap gets full and the collector runs.
