thread_get_message/1¶
thread_get_message(? Term)*
Examines the thread message-queue and if necessary blocks execution until a term that unifies to Term arrives in the queue. After a term from the queue has been unified unified to Term, the term is deleted from the queue and this predicate returns.
Please note that not-unifying messages remain in the queue. After the following has been executed, thread 1 has the term gnu
in its queue and continues execution using A is gnat
.
<thread 1>
thread_get_message(a(A)),
<thread 2>
thread_send_message(b(gnu)),
thread_send_message(a(gnat)),
See also thread_peek_message//11.