It will not be used by the implementation in managing the thread, and a 
guardsize value might not even be stored in the thread_t data if setstack() has 
been called as there is no pthread_getguardsize() interface; it is just stored 
in the attribute then for possible, not required, use by the application.
On Tuesday, September 22, 2020 Robert Elz <k...@munnari.oz.au> wrote:
    Date:        Tue, 22 Sep 2020 14:38:07 +0000 (UTC)
    From:        shwaresyst <shwares...@aol.com>
    Message-ID:  <32911555.5186984.1600785487...@mail.yahoo.com>

  | Yes, it is no longer a factor,

I would have guessed that is what "not used" means, but:

  | and no, it will return what last setting was, be it from init()
  | or a setguardsize()

How is that "not used" ?

  | A set only affects that one attr object, not all of them,

Not the issue.

kre


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