/// <summary>
/// Dispose function as suggested in the stackoverflow discussion below
/// See: http://stackoverflow.com/questions/538060/proper-use-of-the-idisposable-interface/538238#538238
/// </summary>
/// <param name="itIsSafeToAlsoFreeManagedObjects"></param>
protected virtual void Dispose(bool itIsSafeToAlsoFreeManagedObjects)
{
if (!Hdf5Utils.GetRealName(GroupId, Datasetname, string.Empty).valid)
{
Hdf5Utils.LogInfo?.Invoke("Dataset does not exist.");
return;
}
if (_datasetId >= 0)
{
H5D.close(_datasetId);
}
if (_propId >= 0)
{
H5P.close(_propId);
}
if (_spaceId >= 0)
{
H5S.close(_spaceId);
}
if (itIsSafeToAlsoFreeManagedObjects)
{
}
}
public void AppendDataset(Array dataset)
{
if (!Hdf5Utils.GetRealName(GroupId, Datasetname, string.Empty).valid)
{
string msg = "call constructor or FirstDataset first before appending.";
Hdf5Utils.LogError?.Invoke(msg);
throw new Hdf5Exception(msg);
}
_oldDims = _currentDims;
_currentDims = GetDims(dataset);
int rank = dataset.Rank;
ulong[] zeros = Enumerable.Range(0, rank).Select(z => (ulong)0).ToArray();
/* Extend the dataset. Dataset becomes 10 x 3 */
var size = new[] { _oldDims[0] + _currentDims[0] }.Concat(_oldDims.Skip(1)).ToArray();
_status = H5D.set_extent(_datasetId, size);
ulong[] offset = new[] { _oldDims[0] }.Concat(zeros.Skip(1)).ToArray();
/* Select a hyperslab in extended portion of dataset */
var filespaceId = H5D.get_space(_datasetId);
_status = H5S.select_hyperslab(filespaceId, H5S.seloper_t.SET, offset, null,
_currentDims, null);
/* Define memory space */
var memId = H5S.create_simple(Rank, _currentDims, null);
/* Write the data to the extended portion of dataset */
GCHandle hnd = GCHandle.Alloc(dataset, GCHandleType.Pinned);
_status = H5D.write(_datasetId, _datatype, memId, filespaceId,
H5P.DEFAULT, hnd.AddrOfPinnedObject());
hnd.Free();
_currentDims = size;
H5S.close(memId);
H5S.close(filespaceId);
}
public void FirstDataset(Array dataset)
{
if (GroupId <= 0)
{
throw new Hdf5Exception("cannot call FirstDataset because group or file couldn't be created");
}
if (Hdf5Utils.GetRealName(GroupId, Datasetname, string.Empty).valid)
{
throw new Hdf5Exception("cannot call FirstDataset because dataset already exists");
}
Rank = dataset.Rank;
_currentDims = GetDims(dataset);
/* Create the data space with unlimited dimensions. */
_spaceId = H5S.create_simple(Rank, _currentDims, _maxDims);
/* Modify dataset creation properties, i.e. enable chunking */
_propId = H5P.create(H5P.DATASET_CREATE);
_status = H5P.set_chunk(_propId, Rank, _chunkDims);
/* Create a new dataset within the file using chunk creation properties. */
_datasetId = H5D.create(GroupId, Hdf5Utils.NormalizedName(Datasetname), _datatype, _spaceId, H5P.DEFAULT, _propId);
/* Write data to dataset */
GCHandle hnd = GCHandle.Alloc(dataset, GCHandleType.Pinned);
_status = H5D.write(_datasetId, _datatype, H5S.ALL, H5S.ALL, H5P.DEFAULT,
hnd.AddrOfPinnedObject());
if (_status < 0)
{
Hdf5Utils.LogError("Unable to write dataset");
}
hnd.Free();
H5S.close(_spaceId);
_spaceId = -1;
}