On Friday, 14 April 2023 at 03:50:37 UTC, backtrack wrote:
Dear All, I am new to D lang. I have been given a task to
consume the .dll generated from a D lang project.
I added extern (c) function for call the .dll from CPP file. i
have code like below
```
// myfile.d
extern(c)
{
mystruct* getmystruct()
{
mystruct* mystruct =
cast(mystruct*)malloc(mystruct.sizeof);
return mystruct;
}
```
[...]
Now i have my cpp file which calls like below
```
mystruct* mystruct = lib.getmystruct();
char* output = lib.do_some_work(mystruct, "input", 5);
```
The problem i am facing is, the memory keep on increasing and i
am not able to fix the memory issue. I am suspecting that since
the D lang function is called from extern(c) function GC is not
clearing the memeory.
The GC does not clean up memory allocated by `malloc`. Since
you're using `malloc` to allocate your memory, the only way you
can free it is by using `free`.
If you want the GC to clean up your memory, use `new` to allocate
it instead of `malloc`. Like this:
```d
mystruct* getmystruct()
{
return new mystruct;
}
```
