[racket] FFI, string, malloc/free

 What about 

(define-lib foo (fun _string -> _void))

(foo "Test")

?

Will be the pointer from string "Test" freed? And how to make it retain, if I need to save it on the foreign side?


Суббота, 15 июня 2013, 13:29 +02:00 от Laurent <laurent.orseau at gmail.com>:
>You probably want `register-finalizer':
>http://docs.racket-lang.org/foreign/foreign_pointer-funcs.html#%28def._%28%28lib._ffi/unsafe..rkt%29._register-finalizer%29%29
>
>See also:
>http://docs.racket-lang.org/foreign/Allocation_and_Finalization.html
>
>Regarding the default behavior, I think Racket does not free automatically what it did not allocate itself.
>So the lib you're linking to either has functions to do the allocation/deallocation, or its doc should say what you need to free yourself.
>
>Laurent
>
>
>On Sat, Jun 15, 2013 at 12:47 PM, Клочков Роман  < kalimehtar at mail.ru > wrote:
>>When I describe type
>>
>>(_fun _string -> _string)
>>
>>where can I put, whether these string c-pointers should be freed after function call? Also, what is default behavior?
>>
>>
>>-- 
>>Роман Клочков
>>____________________
>>  Racket Users list:
>>   http://lists.racket-lang.org/users
>>
>


-- 
Roman Klochkov
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