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Portable Hardware Locality (hwloc) Documentation: v1.9

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Components and Plugins: Core functions to be used by components

Typedefs

typedef void(* hwloc_report_error_t )(const char *msg, int line)
 

Functions

struct hwloc_objhwloc_insert_object_by_cpuset (struct hwloc_topology *topology, hwloc_obj_t obj)
 
void hwloc_report_os_error (const char *msg, int line)
 
int hwloc_hide_errors (void)
 
struct hwloc_objhwloc__insert_object_by_cpuset (struct hwloc_topology *topology, hwloc_obj_t obj, hwloc_report_error_t report_error)
 
void hwloc_insert_object_by_parent (struct hwloc_topology *topology, hwloc_obj_t parent, hwloc_obj_t obj)
 
static struct hwloc_objhwloc_alloc_setup_object (hwloc_obj_type_t type, signed os_index)
 
int hwloc_fill_object_sets (hwloc_obj_t obj)
 
static int hwloc_plugin_check_namespace (const char *pluginname, const char *symbol)
 

Detailed Description

Typedef Documentation

typedef void(* hwloc_report_error_t)(const char *msg, int line)

Type of error callbacks during object insertion.

Function Documentation

struct hwloc_obj* hwloc__insert_object_by_cpuset ( struct hwloc_topology *  topology,
hwloc_obj_t  obj,
hwloc_report_error_t  report_error 
)

Add an object to the topology and specify which error callback to use.

Aside from the error callback selection, this function is identical to hwloc_insert_object_by_cpuset()

static struct hwloc_obj* hwloc_alloc_setup_object ( hwloc_obj_type_t  type,
signed  os_index 
)
static

Allocate and initialize an object of the given type and physical index.

int hwloc_fill_object_sets ( hwloc_obj_t  obj)

Setup object cpusets/nodesets by OR'ing its children.

Used when adding an object late in the topology, after propagating sets up and down. The caller should use this after inserting by cpuset (which means the cpusets is already OK). Typical case: PCI backend adding a hostbridge parent.

int hwloc_hide_errors ( void  )

Check whether insertion errors are hidden.

struct hwloc_obj* hwloc_insert_object_by_cpuset ( struct hwloc_topology *  topology,
hwloc_obj_t  obj 
)

Add an object to the topology.

It is sorted along the tree of other objects according to the inclusion of cpusets, to eventually be added as a child of the smallest object including this object.

If the cpuset is empty, the type of the object (and maybe some attributes) must be enough to find where to insert the object. This is especially true for NUMA nodes with memory and no CPUs.

The given object should not have children.

This shall only be called before levels are built.

In case of error, hwloc_report_os_error() is called.

Returns the object on success. Returns NULL and frees obj on error. Returns another object and frees obj if it was merged with an identical pre-existing object.

void hwloc_insert_object_by_parent ( struct hwloc_topology *  topology,
hwloc_obj_t  parent,
hwloc_obj_t  obj 
)

Insert an object somewhere in the topology.

It is added as the last child of the given parent. The cpuset is completely ignored, so strange objects such as I/O devices should preferably be inserted with this.

The given object may have children.

Remember to call topology_connect() afterwards to fix handy pointers.

static int hwloc_plugin_check_namespace ( const char *  pluginname,
const char *  symbol 
)
inlinestatic

Make sure that plugins can lookup core symbols.

This is a sanity check to avoid lazy-lookup failures when libhwloc is loaded within a plugin, and later tries to load its own plugins. This may fail (and abort the program) if libhwloc symbols are in a private namespace.

Plugins should call this function as an early sanity check to avoid later crashes if lazy symbol resolution is used by the upper layer that loaded hwloc (e.g. OpenCL implementations using dlopen with RTLD_LAZY).

Note
The build system must define HWLOC_INSIDE_PLUGIN if and only if building the caller as a plugin.
void hwloc_report_os_error ( const char *  msg,
int  line 
)

Report an insertion error from a backend.