shared_ptr with malloc and free

Question

I have working in large application which contain c and cpp. The all files saved as cpp extension but the code is written in c- style. I mean it is define structure rather than

Answer 1

To use a std::shared_pointer with malloc() and free() you should specify a custom deleter. This should do it

std::shared_ptr ptr(static_cast(malloc(sizeof(T))), free);

As long as you do not pass around the result of std::shared_ptr::get(), your pointer is safe.

Edit: Added casting the result of malloc() to T*.