H5Ewalk
(
H5E_direction_t direction
,
H5E_walk_t func
,
void * client_data
)
H5Ewalk
(
hid_t estack_id
,
H5E_direction_t direction
,
H5E_walk_t func
,
void * client_data
)
H5Ewalk
is a macro that is mapped to either
H5Ewalk1
or
H5Ewalk2
,
depending on the needs of the application.
Such macros are provided to facilitate application compatibility. For more information on macro use and mappings, see the “API Compatibility Macros in HDF5” document.
When both the HDF5 Library and the application are built and
installed with no specific compatibility flags,
H5Ewalk
is mapped to the most recent version of
the function, currently
H5Ewalk2
.
If the library and/or application is compiled for Release 1.6
emulation, H5Ewalk
will be mapped to
H5Ewalk1
.
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 | H5Ewalk mapping |
---|---|
Global settings |
|
No compatibility flag | H5Ewalk2 |
Enable deprecated symbols | H5Ewalk2 |
Disable deprecated symbols | H5Ewalk2 |
Emulate Release 1.6 interface |
H5Ewalk1 |
Function-level macros |
|
H5Ewalk_vers = 2 |
H5Ewalk2 |
H5Ewalk_vers = 1 |
H5Ewalk1 |
If a C routine that takes a function pointer as an argument is called from within C++ code, the C routine should be returned from normally.
Examples of this kind of routine include callbacks such as
H5Pset_elink_cb
and H5Pset_type_conv_cb
and functions such as H5Tconvert
and
H5Ewalk2
.
Exiting the routine in its normal fashion allows the HDF5 C Library to clean up its work properly. In other words, if the C++ application jumps out of the routine back to the C++ “catch” statement, the library is not given the opportunity to close any temporary data structures that were set up when the routine was called. The C++ application should save some state as the routine is started so that any problem that occurs might be diagnosed.
Release | C |
1.8.0 | The function
H5Ewalk renamed to H5Ewalk1
and deprecated in this release.
The macro H5Ewalk
and the function H5Ewalk2
introduced in this release. |