[Oberon] Doubt from Project Oberon book.

[Srinivas Nayak]

Dear Bob,

Now I understood the case.

With thanks and best regards,

Yours sincerely,
Srinivas Nayak

Home: http://www.mathmeth.com/sn/
Blog: http://srinivas-nayak.blogspot.in/


Bob Walkden wrote:
>> From: Srinivas Nayak [mailto:sinu.nayak2001 at gmail.com]
>>
>> Dear Bob,
>>
>> Many thanks for making my doubt clear.
>> Now I am able to see the whole idea.
>>
>>      so the contents of
>>      their variables are still available and other modules can use them
>>
>>
>> However, if somebody unloads the previous module before second command
>> starts?
>> Or this case is not possible?
>>
> It is possible. But the Oberon system will only unload a module M1 if there
> are no active references to it. This means that if the module M2 which
> contains the second command has already been loaded, then you cannot unload
> M1.
>
> If on the other hand M2 has not been loaded, then you can unload M1.
>
> Loading M2 would then re-load M1, because of the import dependency. But of
> course the storage would be refreshed so the earlier results would no longer
> be available unless you had taken steps within M1 to save&  retrieve them.
>
> B
>
>
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