hmm... I found it in the header file "neo_err.h":

/* function: nerr_log_error

 * description: currently, this prints out the error to stderr, and

 *             free's the error chain

 */

void nerr_log_error (NEOERR *err);

Besides, I didn't find any explicit release action of neo_err in the test code like:

part of "hdf_test.c" under util/test/

int main(int argc, char **argv)

{

  NEOERR *err;

  err = dictionary_test();

  if (err)

  {

    nerr_log_error(err);

    printf("FAIL\n");

    return -1;

  }

  printf("PASS\n");

  return 0;

}

If I didn't misunderstand the src code, the neo_err *err is allocated and initialized during nerr_rasie and nerr_pass, but where does the test code free it?

On 2011-12-22, at 上午3:18, Brandon Long wrote:

I don't think any of those free the error chain, where did you get that impression?  Its not in the api docs, as near as I can tell.

Brandon

On Tue, Dec 20, 2011 at 10:28 PM, caox <caox@...> wrote:

Hi

Sorry to bother. According to the description and code example, the API  nerr_log_error should free the err chain. But I didn't find the respective code to release the err chain inside the implementation:

void nerr_log_error (NEOERR *err)

{

  NEOERR *more;

  char buf[1024];

  char *err_name;

  if (err == STATUS_OK)

    return;

  if (err == INTERNAL_ERR)

  {

    ne_warn ("Internal error");

    return;

  }

  more = err;

  fprintf (stderr, "Traceback (innermost last):\n");

  while (more && more != INTERNAL_ERR)

  {

    err = more;

    more = err->next;

    if (err->error != NERR_PASS)

    {

      NEOERR *r;

      if (err->error == 0)

      {

err_name = buf;

snprintf (buf, sizeof (buf), "Unknown Error");

      }

      else

      {

r = uListGet (Errors, err->error - 1, (void *)&err_name);

if (r != STATUS_OK)

{

  err_name = buf;

  snpri ntf (buf, sizeof (buf), "Error %d", err->error);

}

      }

      fprintf (stder r, "  File \"%s\", line %d, in %s()\n%s: %s\n", err->file, 

  err->lineno, err->func, err_name, err->desc);

    }

    else

    {

      fprintf (stderr, "  File \"%s\", line %d, in %s()\n", err->file, 

  err->lineno, err->func);

      if (err->desc[0])

      {

fprintf (stderr, "    %s\n", err->desc);

      }

    }

  }

}

So, is the err chain freed in other place or I have missed something inside the function? Does nerr_log_error free the err chain, as for nerr_err_string and nerr_err_traceback?

Thanks.

B.R.