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    T-hash                  ObjectMonitor              T-deflate
    ----------------------  +-----------------------+  --------------------------------------
    save_om_ptr() {         | owner=DEFLATER_MARKER |  cmpxchg(DEFLATER_MARKER, &owner, NULL)
      :                     | count=0               |  if (waiters != 0 or ref_count != 0) {
      atomic inc ref_count  | ref_count=1          0           |  }
                            +-----------------------+  prev = cmpxchg(-max_jint, &count, 0)

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