Fig. 1

Tuple space basic operations. a out(t): servers receive a tuple t from the client, store t in the tuple space and return “ok”. b \(rdp(\bar {t})\): servers receive a template \(\bar {t}\), find a tuple t that matches \(\bar {t}\) and return t keeping it on the tuple space. If no tuple is found, servers return null. c \(inp(\bar {t})\): servers receive a template \(\bar {t}\), find a tuple t that matches \(\overline {t}\) and return t removing it from the tuple space. If no tuple is found, servers return null