#### 8.1.6.2 Shared and Protected Objects

In the code below, we define two kinds of shared objects. External_Synchronization requires that the different partitions updating this data synchronize to avoid conflicting operations on shared objects. Internal_Synchronization provides a way to get an atomic operation on shared objects. Note that only entryless protected types are allowed in a shared passive unit; synchronization must be done with protected procedures.

    package SharedObjects is
       pragma Shared_Passive;

       Max : Positive := 10;
       type Index_Type is range 1 .. Max;
       type Rate_Type is new Float;

       type Rates_Type is array (Index_Type) of Rate_Type;

       External_Synchronization : Rates_Type;

       protected Internal_Synchronization is
          procedure Set
            (Index : in Index_Type;
             Rate  : in Rate_Type);

          procedure Get
            (Index : in Index_Type;
             Rate  : out Rate_Type);
       private
       --  implementation removed
    end SharedObjects;