hwlocality_object_strings(3) Library Functions Manual
NAME
hwlocality_object_strings - Converting between Object Types and
Attributes, and Strings
SYNOPSIS
Functions
const char * hwloc_obj_type_string (hwloc_obj_type_t type)
int hwloc_obj_type_snprintf (char *restrict string, size_t size,
hwloc_obj_t obj, int verbose)
int hwloc_obj_attr_snprintf (char *restrict string, size_t size,
hwloc_obj_t obj, const char *restrict separator, int verbose)
int hwloc_type_sscanf (const char *string, hwloc_obj_type_t *typep,
union hwloc_obj_attr_u *attrp, size_t attrsize)
int hwloc_type_sscanf_as_depth (const char *string, hwloc_obj_type_t
*typep, hwloc_topology_t topology, int *depthp)
Detailed Description
Function Documentation
int hwloc_obj_attr_snprintf (char *restrict string, size_t size,
hwloc_obj_t obj, const char *restrict separator, int verbose)
Stringify the attributes of a given topology object into a human-
readable form. Attribute values are separated by separator.
Only the major attributes are printed in non-verbose mode.
If size is 0, string may safely be NULL.
Returns
the number of characters that were actually written if not
truncating, or that would have been written (not including the
ending \0).
int hwloc_obj_type_snprintf (char *restrict string, size_t size,
hwloc_obj_t obj, int verbose)
Stringify the type of a given topology object into a human-readable
form. Contrary to hwloc_obj_type_string(), this function includes
object-specific attributes (such as the Group depth, the Bridge type,
or OS device type) in the output, and it requires the caller to provide
the output buffer.
The output is guaranteed to be the same for all objects of a same
topology level.
If verbose is 1, longer type names are used, e.g. L1Cache instead of
L1.
The output string may be parsed back by hwloc_type_sscanf().
If size is 0, string may safely be NULL.
Returns
the number of characters that were actually written if not
truncating, or that would have been written (not including the
ending \0).
const char * hwloc_obj_type_string (hwloc_obj_type_t type)
Return a constant stringified object type. This function is the basic
way to convert a generic type into a string. The output string may be
parsed back by hwloc_type_sscanf().
hwloc_obj_type_snprintf() may return a more precise output for a
specific object, but it requires the caller to provide the output
buffer.
Returns
A constant string containing the object type name or 'Unknown'.
int hwloc_type_sscanf (const char * string, hwloc_obj_type_t * typep, union
hwloc_obj_attr_u * attrp, size_t attrsize)
Return an object type and attributes from a type string. Convert
strings such as 'Package' or 'L1iCache' into the corresponding types.
Matching is case-insensitive, and only the first letters are actually
required to match.
The matched object type is set in typep (which cannot be NULL).
Type-specific attributes, for instance Cache type, Cache depth, Group
depth, Bridge type or OS Device type may be returned in attrp.
Attributes that are not specified in the string (for instance 'Group'
without a depth, or 'L2Cache' without a cache type) are set to -1.
attrp is only filled if not NULL and if its size specified in attrsize
is large enough. It should be at least as large as union
hwloc_obj_attr_u.
Returns
0 if a type was correctly identified, otherwise -1.
Note
This function is guaranteed to match any string returned by
hwloc_obj_type_string() or hwloc_obj_type_snprintf().
This is an extended version of the now deprecated
hwloc_obj_type_sscanf().
int hwloc_type_sscanf_as_depth (const char * string, hwloc_obj_type_t *
typep, hwloc_topology_t topology, int * depthp)
Return an object type and its level depth from a type string. Convert
strings such as 'Package' or 'L1iCache' into the corresponding types
and return in depthp the depth of the corresponding level in the
topology topology.
If no object of this type is present on the underlying architecture,
HWLOC_TYPE_DEPTH_UNKNOWN is returned.
If multiple such levels exist (for instance if giving Group without any
depth), the function may return HWLOC_TYPE_DEPTH_MULTIPLE instead.
The matched object type is set in typep if typep is non NULL.
Note
This function is similar to hwloc_type_sscanf() followed by
hwloc_get_type_depth() but it also automatically disambiguates
multiple group levels etc.
This function is guaranteed to match any string returned by
hwloc_obj_type_string() or hwloc_obj_type_snprintf().
Author
Generated automatically by Doxygen for Hardware Locality (hwloc) from
the source code.
Hardware Locality (hwloc) Version 2.12.0 hwlocality_object_strings(3)
hwloc 2.12.0 - Generated Fri May 9 07:19:06 CDT 2025