Re: [boost] Proposed new RAII Library

14 Sep 2012

      Andrew Sandoval <sandoval <at> netwaysglobal.com> writes:
...
...
On 14/09/2012 11:12 AM, Andrey Semashev wrote:
...
typedef raii< HANDLE, &CloseHandle > auto_handle;
   class my_class
   {
     auto_handle m_h;
   };
I might add that I much prefer to not typedef RAII classes away like that
shown in the example above.  If I'm putting it into another class, I like to be
able to see exactly how the resource is being dealt with.

For example:

class Something
{
private:
  RAIIWrapper<RAIIDeleter(CloseHandle),INVALID_HANDLE_VALUE> m_hFile;
  RAIIWrapper<RAIIDeleter(CloseHandle)> m_hEvent;
public:
  Something() : m_hFile(OpenSomethingFile()),
    m_hEvent(CreateEvent(NULL, TRUE, FALSE, NULL))
  {
  }

  bool IsFileOpen() const
  {
       return m_hFile.IsValid();
  }
  .
  .
  .
};

I could typedef those two into separate auto_handle's, one for each no-delete
value, but having it front and center like that IMO improves understanding of
what it is used for.

-Andrew Sandoval