Function tdfind

freebsd/kern/kern_thread.c:1659–1691

}

struct thread *
tdfind(lwpid_t tid, pid_t pid)
{
	struct proc *p;
	struct thread *td;

	td = curthread;
	if (td->td_tid == tid) {
		if (pid != -1 && td->td_proc->p_pid != pid)
			return (NULL);
		PROC_LOCK(td->td_proc);
		return (td);
	}

	for (;;) {
		if (!tdfind_hash(tid, pid, &p, &td))
			return (NULL);
		PROC_LOCK(p);
		if (td->td_tid != tid) {
			PROC_UNLOCK(p);
			continue;
		}
		if (td->td_proc != p) {
			PROC_UNLOCK(p);
			continue;
		}
		if (p->p_state == PRS_NEW) {
			PROC_UNLOCK(p);
			return (NULL);
		}
		return (td);
	}
}

void
tidhash_add(struct thread *td)