1lgrp_cookie_stale(3LGRP)Locality Group Library Functionslgrp_cookie_stale(3LGRP)
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NAME

6       lgrp_cookie_stale  -  determine whether snapshot of lgroup hierarchy is
7       stale
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SYNOPSIS

10       cc [ flag ... ] file... -llgrp [ library ... ]
11       #include <sys/lgrp_user.h>
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13       int lgrp_cookie_stale(lgrp_cookie_t cookie);
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DESCRIPTION

17       The lgrp_cookie_stale() function takes a cookie representing the  snap‐
18       shot of the lgroup hierarchy obtained from lgrp_init(3LGRP) and returns
19       whether it is stale. The snapshot can become out-of-date for  a  number
20       of  reasons  depending  on  its  view.   If the snapshot was taken with
21       LGRP_VIEW_OS, changes in the lgroup hierarchy from dynamic reconfigura‐
22       tion,  CPU  on/offline,  or  other conditions can cause the snapshot to
23       become out-of-date. A  snapshot  taken  with  LGRP_VIEW_CALLER  can  be
24       affected  by the caller's processor set binding and changes in its pro‐
25       cessor set itself, as well as changes in the lgroup hierarchy.
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28       If the snapshot needs to be updated, lgrp_fini(3LGRP) should be  called
29       with  the  old  cookie and lgrp_init() should be called to obtain a new
30       snapshot.
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RETURN VALUES

33       Upon successful completion,  lgrp_cookie_stale()  returns  whether  the
34       cookie  is  stale.  Otherwise, it returns −1 and sets errno to indicate
35       the error.
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ERRORS

38       The lgrp_cookie_stale() function will fail if:
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40       EINVAL    The cookie is not valid.
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ATTRIBUTES

44       See attributes(5) for descriptions of the following attributes:
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49       ┌─────────────────────────────┬─────────────────────────────┐
50       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
51       ├─────────────────────────────┼─────────────────────────────┤
52       │Interface Stability          │Evolving                     │
53       ├─────────────────────────────┼─────────────────────────────┤
54       │MT-Level                     │MT-Safe                      │
55       └─────────────────────────────┴─────────────────────────────┘
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SEE ALSO

58       lgrp_init(3LGRP),  lgrp_fini(3LGRP),  lgrp_view(3LGRP),  liblgrp(3LIB),
59       attributes(5)
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63SunOS 5.11                        16 Apr 2003         lgrp_cookie_stale(3LGRP)
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