H5D_OPEN is a macro that is mapped to either H5D_OPEN1 or H5D_OPEN2, depending on the needs of the application.
Such macros are provided to facilitate application compatibility. Their use and mappings are fully described in API Compatibility Macros in HDF5; we urge you to read that document closely.
When both the HDF5 library and the application are built and installed with no specific compatibility flags, H5D_OPEN is mapped to the most recent version of the function, currently H5D_OPEN2. If the library and/or application is compiled for Release 1.6 emulation, H5D_OPEN will be mapped to H5D_OPEN1. Function-specific flags are available to override these settings on a function-by-function basis when the application is compiled.
Specific compile-time compatibility flags and the resulting mappings are as follows:
|Compatibility setting||H5Dopen mapping|
|No compatibility flag|
|Enable deprecated symbols|
|Disable deprecated symbols|
|Emulate Release 1.6 interface|
H5Dopen_vers = 2
H5Dopen_vers = 1
A dataset opened with this macro should be closed with H5D_CLOSE when the dataset is no longer needed so that resource leaks will not develop.