Re: [boost] temp file

From: Dylan Trotter (trotterdylan_at_[hidden])
Date: 2005-09-09 15:23:08

I think the most important case involves a completely opaque temp file. 
You can perform stream operations on it and share it within a process 
but have no access to the filesystem specific information (i.e. its 
filename).

Agree or disagree?

Dylan

Stefan Seefeld wrote:
> Matt Doyle wrote:
> 
>>>I didn't know about that, because on win32 there is a problem with
>>>deleting open files.
>>
>>
>>Using the WIN32 call CreateFile specify FILE_ATTRIBUTE_TEMPORARY. 
>>
>>from MSDN -> FILE_ATTRIBUTE_TEMPORARY - A file is being used for temporary storage. File systems avoid writing data back to mass storage if sufficient cache memory is available, because an application deletes a temporary file after a handle is closed. In that case, the system can entirely avoid writing the data. Otherwise, the data is written after the handle is closed.
>>
>>You still can't delete an open file but you can possibly avoid ever creating the file in the first place..
> 
> 
> But then you have to carefully craft the spec, as users may expect to be able to
> share the file (by name) among processes. There are clearly different use
> cases for temporary files, so it is important to capture the most important ones.
> 
> Regards,
> 		Stefan
> 
> _______________________________________________
> Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
>