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5.7.3 Releasing Memory for a Variable Length Array (VLEN) Type: NF_FREE_VLEN

When a VLEN is read into user memory from the file, the HDF5 library performs memory allocations for each of the variable length arrays contained within the VLEN structure. This memory must be freed by the user to avoid memory leaks.

This violates the normal netCDF expectation that the user is responsible for all memory allocation. But, with VLEN arrays, the underlying HDF5 library allocates the memory for the user, and the user is responsible for deallocating that memory.

Usage

     INTEGER FUNCTION NF_FREE_VLEN(CHARACTER VL);
VL
The variable length array structure which is to be freed.

Errors

NF_NOERR
No error.
NF_EBADTYPE
Can't find the typeid.

Example