H5Pget_fclose_degree

Hdf-forum archives
1

I'm getting a curious crash and wonder if I'm doing something wrong:

Code snippet:

  herr_t ret;
  hid_t fapl_id = H5Pcreate( H5P_FILE_ACCESS );
  H5Pset_fclose_degree( fapl_id, H5F_CLOSE_STRONG ); //H5F_CLOSE_DEFAULT
  hid_t hdfFile = H5Fcreate(dbPathString, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
  
  hid_t fapl_id2 = H5Fget_access_plist(hdfFile);
  H5F_close_degree_t *fc_degree;
  //H5Pget_fclose_degree( fapl_id2, fc_degree ); //if uncommented, will crash soon after (bad access)

If the last line is uncommented, the program crashes in odd ways. The line executes in debugger, and I can verify that fc_degree points to a value consistent with the setting. It's not until a few lines more are executed that it dies. I'd like to verify that the above code should work before rooting around for deeper causes. I'm using HDF5 1.6.5 (fink port on mac).

Thanks,
Ken

···

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2

Hi Ken,

I'm getting a curious crash and wonder if I'm doing something wrong:

Code snippet:

  herr_t ret;
  hid_t fapl_id = H5Pcreate( H5P_FILE_ACCESS );
  H5Pset_fclose_degree( fapl_id, H5F_CLOSE_STRONG ); //H5F_CLOSE_DEFAULT
  hid_t hdfFile = H5Fcreate(dbPathString, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
  
  hid_t fapl_id2 = H5Fget_access_plist(hdfFile);
  H5F_close_degree_t *fc_degree;
  //H5Pget_fclose_degree( fapl_id2, fc_degree ); //if uncommented, will crash soon after (bad access)

If the last line is uncommented, the program crashes in odd ways. The line executes in debugger, and I can verify that fc_degree points to a value consistent with the setting. It's not until a few lines more are executed that it dies. I'd like to verify that the above code should work before rooting around for deeper causes. I'm using HDF5 1.6.5 (fink port on mac).

  You want to change the last two lines to this:

  H5F_close_degree_t fc_degree;
  H5Pget_fclose_degree( fapl_id2, &fc_degree ); //if uncommented, will crash soon

  Putting values in uninitialized pointers is bad, in general. :slight_smile: :slight_smile:

    Quincey

···

On Dec 11, 2007, at 12:55 PM, Kenneth Sullivan wrote:

Thanks,
Ken

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3

Ach, I guess my brain is already done for the year. I had a feeling I was doing something bone-headed...but wow. Thanks!

···

On Dec 11, 2007, at 10:59 AM, Quincey Koziol wrote:

Hi Ken,

On Dec 11, 2007, at 12:55 PM, Kenneth Sullivan wrote:

I'm getting a curious crash and wonder if I'm doing something wrong:

Code snippet:

  herr_t ret;
  hid_t fapl_id = H5Pcreate( H5P_FILE_ACCESS );
  H5Pset_fclose_degree( fapl_id, H5F_CLOSE_STRONG ); //H5F_CLOSE_DEFAULT
  hid_t hdfFile = H5Fcreate(dbPathString, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
  
  hid_t fapl_id2 = H5Fget_access_plist(hdfFile);
  H5F_close_degree_t *fc_degree;
  //H5Pget_fclose_degree( fapl_id2, fc_degree ); //if uncommented, will crash soon after (bad access)

If the last line is uncommented, the program crashes in odd ways. The line executes in debugger, and I can verify that fc_degree points to a value consistent with the setting. It's not until a few lines more are executed that it dies. I'd like to verify that the above code should work before rooting around for deeper causes. I'm using HDF5 1.6.5 (fink port on mac).

  You want to change the last two lines to this:

  H5F_close_degree_t fc_degree;
  H5Pget_fclose_degree( fapl_id2, &fc_degree ); //if uncommented, will crash soon

  Putting values in uninitialized pointers is bad, in general. :slight_smile: :slight_smile:

    Quincey

Thanks,
Ken

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This mailing list is for HDF software users discussion.
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