From: Eric Hodel <drbrain@...7.net>
Date: 2011-08-08T12:57:15+09:00
Subject: Re: Help in Pointer

On Aug 6, 2011, at 10:08 PM, Tridib Bandopadhyay wrote:
> Hans Mackowiak wrote in post #1014677:
>>> Data_Wrap_Struct(klass, mark, free, ptr)
>> 
>> 
>> if you use
>> Data_Wrap_Struct(klass, 0, free, ptr)
>> or
>> Data_Wrap_Struct(klass, 0, -1, ptr)
>> 
>> the pointer and the data will be freed
>> if you use
>> Data_Wrap_Struct(klass, 0, 0, ptr)
>> the pointer will not be deleted or freed
> 
> So will it make Memory Leak..!!!!

No.  If your object can be freed with free() then everything is fine.  If your object needs to do special things then implement a custom free function.

Ruby will collect the ruby objects inside your pointer when the GC knows it is OK provided you implement a mark function.  You should have something like this:

static void
my_mark(my_pointer *ptr) {
  rb_gc_mark(ptr->ruby_object);
}

Data_Wrap_Struct(klass, my_mark, -1, ptr);