1/* Copyright (C) 2002-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include "pthreadP.h"
20
21int
22pthread_tryjoin_np (pthread_t threadid, void **thread_return)
23{
24 /* Return right away if the thread hasn't terminated yet. */
25 struct pthread *pd = (struct pthread *) threadid;
26 if (pd->tid != 0)
27 return EBUSY;
28
29 /* If pd->tid != 0 then lll_wait_tid will not block on futex
30 operation. */
31 return __pthread_timedjoin_ex (threadid, thread_return, NULL, false);
32}
33