  PROCEDURE [INLINE] osp$clear_job_signature_lock
    (VAR lock: ost$signature_lock);

?? PUSH (LISTEXT := ON) ??
*copyc clc$compiling_for_test_harness
*copyc fsc$compiling_for_test_harness
*copyc sfc$compiling_for_test_harness

*IF NOT $true(osv$unix)
    ?IF NOT (clc$compiling_for_test_harness OR fsc$compiling_for_test_harness OR
          sfc$compiling_for_test_harness) THEN

      VAR
        task_id: ost$global_task_id,
        xcb_p: ^ost$execution_control_block,
        actual_value: integer,
        initial_value: integer,
        cs_status: 0 .. 2;

      xcb_p := #ADDRESS (1, osc$segnum_job_fixed_heap,
            #READ_REGISTER (osc$pr_base_constant));
      task_id := xcb_p^.global_task_id;
      initial_value := task_id.index * 256 * #SIZE (task_id.seqno) + task_id.
            seqno;

      REPEAT
        #COMPARE_SWAP (lock.lock_id, initial_value, 0, actual_value,
              cs_status);
      UNTIL cs_status <> osc$cs_variable_locked;
      IF cs_status <> osc$cs_successful THEN
        osp$system_error ('LOCKMGR - not locked', NIL);
      IFEND;
    ?ELSE
*IFEND
      IF lock.lock_id <> 12 THEN
*IF NOT $true(osv$unix)
        osp$system_error (' lock not set', NIL);
*ELSE
        RETURN;
*IFEND
      IFEND;
      lock.lock_id := 0;
*IF NOT $true(osv$unix)
    ?IFEND
*IFEND

  PROCEND osp$clear_job_signature_lock;
*copyc ost$execution_control_block
*copyc ost$heap
*copyc osc$processor_defined_registers
*copyc ost$signature_lock
*IF NOT $true(osv$unix)
*copyc osp$system_error
?? POP ??
*IFEND
