http://www.hdfgroup.org/HDF5/doc/RM/RM_H5.html#Library-FreeMemory
*From:*Hdf-forum [mailto:hdf-forum-bounces@lists.hdfgroup.org] *On Behalf Of *Jason Sommerville
*Sent:* Friday, September 5, 2014 10:10 AM
*To:* HDF Users Discussion List
*Subject:* Re: [Hdf-forum] Freeing returned strings
Has this issue been resolved in 1.8.13?
Thanks,
Jason
On 10/23/2013 7:21 PM, Elena Pourmal wrote:
Jason and Saulius,
I created an issue in JIRA. Sorry, it will not be implemented in
1.8.12, but we will try to address it in the next release.
Elena
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Elena Pourmal The HDF Group http://hdfgroup.org
1800 So. Oak St., Suite 203, Champaign IL 61820
217.531.6112
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
On Oct 23, 2013, at 4:39 PM, Saulius Raudeliunas > <saulius.raudeliunas@ff.vu.lt > <mailto:saulius.raudeliunas@ff.vu.lt>> wrote:
You are quite right, Jason
I also have this problem with the calls from another language
- for example,
Delphi.
Thus I always have to add the following code in every new
release myself:
Add free memory for functions, returning * char
in:
H5public.h
H5_DLL herr_t H5free_mem(char * memToFree);
in:
H5.c
herr_t
H5free_mem(char * memToFree)
{
herr_t ret_value = SUCCEED;
FUNC_ENTER_API(FAIL)
H5TRACE0("e","");
/* Free memory */
free(memToFree);
done:
FUNC_LEAVE_API(ret_value)
}
It would be nice to have such permanent improvement in version
1.8.12 and
higher.
Regards,
Saulius
-----Original Message-----
From: Hdf-forum [mailto:hdf-forum-bounces@lists.hdfgroup.org
<mailto:forum-bounces@lists.hdfgroup.org>] On Behalf Of
Jason Sommerville
Sent: Thursday, October 24, 2013 12:15 AM
To: hdf-forum@lists.hdfgroup.org
<mailto:hdf-forum@lists.hdfgroup.org>
Subject: [Hdf-forum] Freeing returned strings
Is there a correct way to free strings returned by functions
such as
H5Tget_member_name which return a char*?
The documentation says that they should be freed after use.
That's all well
and good until you're using two different memory allocators.
For example,
I'm currently developing a DLL which calls into the hdf5
libraries. Since
I'm developing the dll, I'm in "_DEBUG" mode and using
Microsoft's debug
memory management. Therefore, if I call free on the returned
pointer, it's
likely to cause an access violation because the free routine
does not match
the alloc routine (I'm using the standard library hdf5 library
straight from
the web).
I found a message to the forum from back in 2009 which is
almost certainly
the same issue. Unfortunately, no one responded to the poor
fellow.
http://hdf-forum.184993.n3.nabble.com/free-buffer-returned-by-H5Tget-member-
name-result-in-runtime-error-in-Windows-Vista-tt194656.html
Ideally, there would be a free function exported from the HDF5
library which
could be called to properly handle the deallocation. If there
is, I haven't
found it in the docs. It seems like the proper function
(MMfree, or
something like that) is #defined to free. Since it's a
#define, it doesn't
end up helping at all.
Thanks,
Jason
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