Re: [netcdfgroup] NcFile close() member function?

• To: Russ Rew <russ@xxxxxxxxxxxxxxxx>
• Subject: Re: [netcdfgroup] NcFile close() member function?
• From: Taylor Binnington <tbinnington@xxxxxxxxx>
• Date: Wed, 30 Jan 2013 13:41:13 -0500

Thank you (and thank you Lynton!) for your help. I have a slightly
different methodology (I've not included the class that I defined that make
this actually work, but you get the idea):

#include <iostream>
#include <ctime>
#include <string>
#include <sstream>
#include <netcdf>

using namespace std;
using namespace netCDF;
using namespace netCDF::exceptions;

int main()
{
  /* Instance of an OPeNDAP URL based on a class I've defined*/
   dap_url dapfile;

   for (int k = 0; k < 10; k++) {

     /* dap_url class contains a get function that returns a URL string*/
     NcFile dataFile(dapfile.get(), NcFile::read);

     /* Do something with the file */

     /* dap_url class contains a method to increment, so that the next
     call to the get() method returns a different file */
     dapfile.addtoday(1);
   }
   return 0;
}

...but it's nice to know that the destructor is called at the end of each
loop.
Taylor


On Wed, Jan 30, 2013 at 1:18 PM, Russ Rew <russ@xxxxxxxxxxxxxxxx> wrote:

> Taylor,
>
> > To finish up with my question, if I can not manually close a file, if I
> > open a NEW file with the same handle 'ncfile' (imagine the small code
> > snippet that I included earlier being inside a loop ), will this
> deallocate
> > the memory used by the earlier instance? I'd like to open (and close)
> > several files in sequence and would like to minimize memory usage.
>
> Here's the response from Lynton Appel:
>
> ... The following will loop through a a set of files. At each pass
> through the loop, the destructor functions for NcDim and NcFile are
> called; in particular the NcFile destructor will issue a call to
> nc_close. So, in my view the API is working correctly.
>
> #include <string>
> #include <iostream>
> #include <netcdf>
>
> using namespace std;
> using namespace netCDF;
>
>
> int main(int argc, char* argv[])
> {
>   char* fileName[] = {"efitOut.nc","efitOut2.nc"};
>  int i;
>   for(i=0;i<2;i++)
>     {
>       NcFile ncFile(fileName[i],NcFile::replace);
>       NcDim timeDim(ncFile.addDim("time",2));
>     }
>   return 1;
> }
>
> --Russ
>



-- 
Taylor Binnington
e. tbinnington@xxxxxxxxx
c. 647 926 4144

• References:
  • [netcdfgroup] NcFile close() member function?
    • From: Taylor Binnington
  • Re: [netcdfgroup] NcFile close() member function?
    • From: Russ Rew
  • Re: [netcdfgroup] NcFile close() member function?
    • From: Taylor Binnington
  • Re: [netcdfgroup] NcFile close() member function?
    • From: Russ Rew