LGRP_COOKIE_STALE(3LGRP)LGRP_COOKIE_STALE(3LGRP)NAMElgrp_cookie_stale - determine whether snapshot of lgroup hierarchy is
stale
SYNOPSIS
cc [ flag ... ] file... -llgrp [ library ... ]
#include <sys/lgrp_user.h>
int lgrp_cookie_stale(lgrp_cookie_t cookie);
DESCRIPTION
The lgrp_cookie_stale() function takes a cookie representing the snap‐
shot of the lgroup hierarchy obtained from lgrp_init(3LGRP) and returns
whether it is stale. The snapshot can become out-of-date for a number
of reasons depending on its view. If the snapshot was taken with
LGRP_VIEW_OS, changes in the lgroup hierarchy from dynamic reconfigura‐
tion, CPU on/offline, or other conditions can cause the snapshot to
become out-of-date. A snapshot taken with LGRP_VIEW_CALLER can be
affected by the caller's processor set binding and changes in its pro‐
cessor set itself, as well as changes in the lgroup hierarchy.
If the snapshot needs to be updated, lgrp_fini(3LGRP) should be called
with the old cookie and lgrp_init() should be called to obtain a new
snapshot.
RETURN VALUES
Upon successful completion, lgrp_cookie_stale() returns whether the
cookie is stale. Otherwise, it returns −1 and sets errno to indicate
the error.
ERRORS
The lgrp_cookie_stale() function will fail if:
EINVAL
The cookie is not valid.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────┬─────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼─────────────────┤
│Interface Stability │ Evolving │
├────────────────────┼─────────────────┤
│MT-Level │ MT-Safe │
└────────────────────┴─────────────────┘
SEE ALSOlgrp_init(3LGRP), lgrp_fini(3LGRP), lgrp_view(3LGRP), liblgrp(3LIB),
attributes(5)
Apr 16, 2003 LGRP_COOKIE_STALE(3LGRP)
