870                     if (a[m & (s - 1)] == null)

   870                     if (((s - base) & ~1) == 0) // size 0 or 1

   871                         signal = true;   // was empty

   871                         signal = true;

  2670      * Returns an estimate of the total number of tasks stolen from

  2670      * Returns an estimate of the total number of completed tasks that

  2671      * one thread's work queue by another. The reported value

  2671      * were executed by a thread other than their submitter. The

  2672      * underestimates the actual total number of steals when the pool

  2672      * reported value underestimates the actual total number of steals

  2673      * is not quiescent. This value may be useful for monitoring and

  2673      * when the pool is not quiescent. This value may be useful for

  2674      * tuning fork/join programs: in general, steal counts should be

  2674      * monitoring and tuning fork/join programs: in general, steal

  2675      * high enough to keep threads busy, but low enough to avoid

  2675      * counts should be high enough to keep threads busy, but low

  2676      * overhead and contention across threads.

  2676      * enough to avoid overhead and contention across threads.