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  1. How does closing a file affect open objects

    An object (dataset, group, attribute, named datatype) in an HDF5 file can be opened, and it can be opened more than once. When an object is opened, the HDF5 library returns a unique identifier to the application. Every object that is opened must be closed. If an object was opened more than once, each identifier
    HDF Knowledge BaseJan 23, 2019
  2. Excessive memory usage and file issues due to objects being left open

    Leaving objects open in an HDF5 application can cause excessive memory usage and potentially corrupt an HDF5 file. If objects in an HDF5 file (group, dataset, attribute, ...) are not closed, then the file does not get closed, which can cause problems. If secondary objects (dataspaces, property lists ...) are left open
    HDF Knowledge BaseApr 11, 2019
  3. Objects

    identifier. An object's location identifier is returned to an application after the object is opened. To open an object, an application uses a function with three parameters: the location identifier of an already opened object, a path from the already opened object to the object that will be opened, and a property list
    HDF5Aug 23, 2019
  4. Why does re-opening an HDF5 file that is already open with an external link fail, when the file was originally opened with H5F_CLOSE_STRONG?

    there is no identifier for such a file and the file is being kept open by objects in it. If an external link were allowed to open an object with the strong file close degree, then all open objects in that file would be immediately closed when that object is closed. This behavior would be surprising or unexpected to some users. For more
    HDF Knowledge BaseDec 14, 2017
  5. H5R_OPEN_OBJECT

    .rmnavbar Opens the HDF5 object referenced Procedure: H5ROPENOBJECT ( refptr, raplid, oaplid ) Signature: <pre><code class="languagec">hidt H5Ropenregion … , to an object, a region in an object or an attribute attached to an object, H5ROPENOBJECT opens that object and returns an identifier. The parameter oaplid
    HDF5yesterday at 12:31 PM
  6. H5F_GET_OBJ_COUNT

    .rmnavbar Returns the number of open object identifiers for an open file Procedure: H5FGETOBJCOUNT (fileid, types) Signature: <pre><code class="languagec … ! H5FOBJGROUPF ! H5FOBJDATASETF ! H5FOBJDATATYPEF ! H5FOBJALLF INTEGER(SIZET), INTENT(OUT) :: objcount ! Number of opened objects INTEGER, INTENT(OUT) :: hdferr
    HDF5Dec 20, 2018
  7. H5O_OPEN_BY_IDX

    .rmnavbar Open the nth object in a group Procedure: H5OOPENBYIDX(locid, groupname, indextype, order, n, laplid) Signature: <pre><code class="languagec">hidt … of index by which objects are ordered H5iterordert order IN: Order of iteration within index hsizet n IN: Object to open hidt laplid IN: Link access property list
    HDF5Apr 25, 2019
  8. H5F_GET_OBJ_IDS

    .rmnavbar Returns a list of open object identifiers Procedure: H5FGETOBJIDS (fileid, types, maxobjs, objidlist) Signature: <pre><code class="languagec">ssizet … code ! 0 on success and 1 on failure INTEGER(SIZET), INTENT(OUT), OPTIONAL :: numobjs ! number of open objects of the specified type END SUBROUTINE h5fgetobjidsf
    HDF5Dec 20, 2018
  9. H5O_OPEN

    .rmnavbar Opens an object in an HDF5 file by location identifier and path name Procedure: H5OOPEN(locid, name, laplid) Signature: <pre><code class="languagec … opens the object in the same manner as H5GOPEN, H5TOPEN, and H5DOPEN. However, H5OOPEN does not require the type of object to be known beforehand. This can
    HDF5Apr 25, 2019
  10. H5P_SET_FCLOSE_DEGREE

    fcdegree in the file access property list faplid. The value of fcdegree determines how aggressively H5FCLOSE deals with objects within a file that remain open when H5FCLOSE is called to close that file. fcdegree can have any one of four valid values: Degree name H5Fclose behavior with no open object in file H5Fclose
    HDF5Jul 25, 2019