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From "Ken Giusti (Jira)" <j...@apache.org>
Subject [jira] [Created] (DISPATCH-1694) sys_thread_self() returns NULL pointer if called by main process thread
Date Thu, 25 Jun 2020 14:19:00 GMT
Ken Giusti created DISPATCH-1694:
------------------------------------

             Summary: sys_thread_self() returns NULL pointer if called by main process thread
                 Key: DISPATCH-1694
                 URL: https://issues.apache.org/jira/browse/DISPATCH-1694
             Project: Qpid Dispatch
          Issue Type: Bug
          Components: Router Node
    Affects Versions: 1.13.0
            Reporter: Ken Giusti
            Assignee: Ken Giusti
             Fix For: 1.13.0


Since the main process "thread" is not a pthread it does not have a sys_thread_t associated
with it.  Since the router uses the main thread as an I/O thread this means that an I/O thread
can have a null sys_thread_self() value.

While technically not _wrong_ it is unexpected; it makes comparing the return value of sys_thread_self()
against a null/uninitialized pointer succeed.

Proposed solution - return a dummy, non-zero value from sys_thread_id() when called from the
main thread.  Ensure this value is unique with respect to sys_thread_id() values returned
by the "real" pthreads.



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