#include <thread.h> thread_t tid; thread_t departedid; int ret; void *status; /* waiting to join thread "tid" with status */ ret = thr_join(tid, &departedid, &status); /* waiting to join thread "tid" without status */ ret = thr_join(tid, &departedid, NULL); /* waiting to join thread "tid" without return id and status */ ret = thr_join(tid, NULL, NULL);
When the tid is (thread_t)0
, then
thread_join() waits for any undetached thread in the process
to terminate. In other words, when no thread identifier is specified, any
undetached thread that exits causes thread_join() to return.