Not OP, and not familiar with Ada - but this might go into the limitations of Ada's concurrency model: Rendezvous Facilities: Concurrent C and the Ada Language

Not OP, and not familiar with Ada - but this might go into the limitations of Ada's concurrency model: Rendezvous Facilities: Concurrent C and the Ada Language - https://www.computer.org/csdl/journal/ts/1988/11/e1546/13rRUx0gewB https://www.computer.org/csdl/journal/ts/1988/11/e1546/13rRU... > The concurrent programming facilities in both Concurrent C and the Ada language are based on the rendezvous concept. Although these facilities are similar, there are substantial differences. > Facilities in Concurrent C were designed keeping in perspective the concurrent programming facilities in the Ada language and their limitations. Concurrent C facilities have also been modified as a result of experience with its initial implementations. > The authors compare the concurrent programming facilities in Concurrent C and Ada and show that it is easier to write a variety of concurrent programs in Concurrent C than in Ada.