Hardware Locality (hwloc) 2.14.0

Functions
Consulting and Adding Info Attributes

## Functions
const char * | hwloc_obj_get_info_by_name (hwloc_obj_t obj, const char *name)
int | hwloc_obj_add_info (hwloc_obj_t obj, const char *name, const char *value)
int | hwloc_obj_set_subtype (hwloc_topology_t topology, hwloc_obj_t obj, const char *subtype)

## Detailed Description

## Function Documentation

## ◆ hwloc_obj_add_info()

int hwloc_obj_add_info | ( | hwloc_obj_t | obj,
|  | const char * | name,
|  | const char * | value )

Add the given name and value pair to the given object info attributes.

The info pair is appended to the existing info array even if another pair with the same name already exists.

The input strings are copied before being added in the object infos.

Returns
  `0` on success, `-1` on error.

Note
  This function may be used to enforce object colors in the lstopo graphical output by adding "lstopoStyle" as a name and "Background=#rrggbb" as a value. See CUSTOM COLORS in the lstopo(1) manpage for details.
  If `name` or `value` contain some non-printable characters, they will be dropped when exporting to XML, see hwloc_topology_export_xml() in hwloc/export.h.

## ◆ hwloc_obj_get_info_by_name()

const char * hwloc_obj_get_info_by_name | ( | hwloc_obj_t | obj,
|  | const char * | name )
| inline

Search the given name in object infos and return the corresponding value.

If multiple info attributes match the given name, only the first one is returned.

Returns
  A pointer to the value string if it exists.
  `NULL` if no such info attribute exists.

Note
  The string should not be freed by the caller, it belongs to the hwloc library.

## ◆ hwloc_obj_set_subtype()

int hwloc_obj_set_subtype | ( | hwloc_topology_t | topology,
|  | hwloc_obj_t | obj,
|  | const char * | subtype )

Set (or replace) the subtype of an object.

The given `subtype` is copied internally, the caller is responsible for freeing the original `subtype` if needed.

If another subtype already exists in `object`, it is replaced. The given `subtype` may be `NULL` to remove the existing subtype.

Note
  This function is mostly meant to initialize the subtype of user-added objects such as groups with hwloc_topology_alloc_group_object().

Returns
  `0` on success.
  `-1` with `errno` set to `ENOMEM` on failure to allocate memory.