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kstat2_mapiter_end(3kstat2)
Kernel Statistics Library Functions, Version 2
kstat2_mapiter_start(3KSTAT2)
NAME
kstat2_mapiter_start, kstat2_mapiter_hasnext, kstat2_mapiter_next,
kstat2_mapiter_remove, kstat2_mapiter_end - iterate over kstat2 map
entries
SYNOPSIS
cc [ flag... ] file... -lkstat2 [ library...]
#include <kstat2.h>
kstat2_status_t kstat2_mapiter_start(kstat2_map_t map,
kstat2_nv_type_t type, kstat2_mapiter_t *iter);
kstat2_status_t kstat2_mapiter_hasnext(kstat2_mapiter_t iter,
boolean_t *has_next);
kstat2_status_t kstat2_mapiter_next(kstat2_mapiter_t iter,
kstat2_nv_t *nv);
kstat2_status_t kstat2_mapiter_remove(kstat2_mapiter_t iter);
kstat2_status_t kstat2_mapiter_end(kstat2_mapiter_t *iter);
DESCRIPTION
The kstat2_mapiter_start() function creates a new iterator that can be
used to traverse the specified map. The type parameter specifies the
type of map keys to be visited and is an ORed combination of
KSTAT2_NVK_SYS for kernel kstat values, KSTAT2_NVK_USR for user-added
values, KSTAT2_NVK_MAP for sub-maps, or KSTAT2_NVK_ALL to visit all
types of values. The order in which values are visited is undefined,
but provided no changes are made to the map, both successive and con‐
current iterations over the map will return the values in the same
order.
kstat2_mapiter_hasnext() sets has_next to true, if the map has unvis‐
ited values and to false if all values have been visited.
kstat2_mapiter_next() obtains the next unvisited value from the map.
kstat2_mapiter_remove() removes the current value from the map.
kstat2_mapiter_end() deallocates the iterator when the application has
finished iterating over the map.
RETURN VALUES
Upon successful completion the iterator functions will return
KSTAT2_S_OK, otherwise an error will be returned. A map may have multi‐
ple concurrent iterators but if the map is modified either directly
(for example, by a call to a kstat2_map_put_*() function or
kstat2_map_remove()) or through another iterator (for example, through
the kstat2_mapiter_remove()), subsequent iterator calls will fail and
any open iterators must be disposed of by a call to
kstat2_mapiter_end().
ERRORS
The kstat2_mapiter_start(), kstat2_mapiter_hasnext(),
kstat2_mapiter_next(), kstat2_mapiter_remove(), and
kstat2_mapiter_end() functions will fail if:
KSTAT2_S_INVAL_ARG The handle or ir iterator parameter was invalid
KSTAT2_S_NO_MEM Memory could not be allocated for the data
KSTAT2_S_DEL_MAP If the kstat has been deleted by the kernel
KSTAT2_S_NO_MEM If no memory could be allocated
KSTAT2_S_SYS_FAIL If an underlying system call failed, see errno
The kstat2_mapiter_next(), kstat2_mapiter_remove(), and
kstat2_mapiter_end() functions will fail if:
KSTAT2_S_INVAL_STATE The iterator has reached the end of the map or
the item has already been removed
The kstat2_mapiter_hasnext(), kstat2_mapiter_next(),
kstat2_mapiter_remove(), and kstat2_mapiter_end() functions will fail
if:
KSTAT2_S_CONC_MOD The map has been modified elsewhere
The kstat2_mapiter_remove() function will fail if:
KSTAT2_S_NO_PERM An attempt to remove a system value has been made
FILES
/dev/kstat kernel statistics driver
/usr/include/kstat2.h header
EXAMPLES
See the kstat2(3KSTAT2) manpage.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Interface StabilityCommitted _ MT-LevelMT-Safe with
exceptions
SEE ALSO
kstat2(3KSTAT2), kstat2_close(3KSTAT2), kstat2_close(3KSTAT2),
kstat2_map_get(3KSTAT2), kstat2_map_get_userdata(3KSTAT2),
kstat2_map_meta(3KSTAT2), kstat2_map_parent(3KSTAT2),
kstat2_map_put_integer(3KSTAT2), kstat2_map_put_integers(3KSTAT2),
kstat2_map_put_string(3KSTAT2), kstat2_map_put_strings(3KSTAT2),
kstat2_map_remove(3KSTAT2), kstat2_map_set_data_cb(3KSTAT2),
kstat2_map_set_destroy_cb(3KSTAT2), kstat2_map_set_tree_cb(3KSTAT2),
kstat2_map_set_userdata(3KSTAT2), kstat2_map_size(3KSTAT2),
kstat2_map_to_array(3KSTAT2), kstat2_map_uri(3KSTAT2),
kstat2_mapiter_end(3KSTAT2), kstat2_mapiter_hasnext(3KSTAT2),
kstat2_mapiter_next(3KSTAT2), kstat2_mapiter_remove(3KSTAT2),
kstat2_mapref_alloc(3KSTAT2), kstat2_mapref_deref(3KSTAT2),
kstat2_mapref_free(3KSTAT2), kstat2_nv_meta(3KSTAT2),
kstat2_open(3KSTAT2), kstat2_status_string(3KSTAT2),
kstat2_update(3KSTAT2), kstat2_uri_decode(3KSTAT2),
kstat2_uri_encode(3KSTAT2), libkstat2(3LIB)
NOTES
The kstat2 functions are MT-Safe with the exception that only one
thread may actively use a kstat2_handle_t, or any object obtained
through it, at any one time. Synchronization is required if multiple
threads intend to share a kstat2_handle_t or any object obtained
through it. Synchronization is left to the application.
Oracle Solaris 11.4 27 Nov 2017
kstat2_mapiter_start(3KSTAT2)