Mailinglist Archive: zypp-devel (68 mails)

[Michael Andres <ma@xxxxxxx>]

On Wed, May 02, Michael Andres wrote:

> USE RAII
> http://en.wikipedia.org/wiki/Resource_Acquisition_Is_Initialization
> 
> Resource Acquisition Is Initialization, often referred to by the acronym RAII,
> is a popular programming technique in C++ and D. The technique
> combines acquisition and release of resources with initialization and
> uninitialization of variables.


libzypp/doc/autodoc/html/group__g__RAII.html 

(Icomplete like most docs ;(  Fell free to add and update it. )

class   zypp::DtorReset
        Assign a vaiable a certain value when going out of scope

class   zypp::base::Fd
        Assert close called on open filedescriptor

struct  zypp::str::SafeBuf
        Assert free called for allocated char *




Some more examples, not (yet) listed:

zypp::AutoDispose< _Tp > 
        Reference counted access to a _Tp object calling a custom Dispose 
        function when the last AutoDispose handle to it is destroyed or reset. 
        
        Sounds more complicated than it actually is. See the 
        AutoDispose<const Pathname> example for exception safe 
        handling of temporary files. 

        Used eg. to return the binary rpm retrieved from some media.
        Dependent on the type of media (downladed or not), and the 
        way it was retrieved, we need different kinds of 
        

Of course: libzypp/doc/autodoc/html/group__ZYPP__SMART__PTR.html

 
zypp::filesystem::TmpFile 
        Provide a new empty temporary file and delete it when no longer 
        needed.

zypp::filesystem::TmpDir
        Provide a new empty temporary directory and recursively delete it 
        when no longer needed.




None of these is complete or perfect. But we have at least some solutions 
for some problems. 

But they don't help if they are not used.



If you're looking for a solution and don't find it, ask for it. Maybe 
something is there and you did not find it. If not, it's probabely
worth creating or improving something.

I know, more common solutions take a bit longer in the beginning. But 
they soon outperform any copy-and-paste code. 


Don't try to write as much code as you can. Only as much as you need.

Less code - less time - less errors... 

 (in northern germany they call this 'schlau schnacken' :)

-- 

cu,
    Michael Andres

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