guideline

Minimize the work performed during a rendezvous.

Minimize the work performed in the selective accept loop of a task.

Consider using protected objects for data synchronization and communication.

In the following example, the statements in the accept body are performed as part of the execution of both the caller task and the task Server, which contains Operation and Operation2. The statements after the accept body are executed before Server can accept additional calls to Operation or Operation2.

   ...
   loop
      select
         accept Operation do
            -- These statements are executed during rendezvous.
            -- Both caller and server are blocked during this time.
            ...
         end Operation;
         ...
         -- These statements are not executed during rendezvous.
         -- The execution of these statements increases the time required
         --   to get back to the accept and might be a candidate for another task.

      or
         accept Operation_2 do
            -- These statements are executed during rendezvous.
            -- Both caller and server are blocked during this time.
            ...
         end Operation_2;
      end select;
      -- These statements are also not executed during rendezvous,
      -- The execution of these statements increases the time required
      --   to get back to the accept and might be a candidate for another task.

   end loop;