1 /* Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
23 #include <lowlevellock.h>
27 #include <shlib-compat.h>
28 #include <kernel-features.h>
32 __pthread_cond_signal (cond)
35 /* Make sure we are alone. */
36 lll_mutex_lock (cond->__data.__lock);
38 /* Are there any waiters to be woken? */
39 if (cond->__data.__total_seq > cond->__data.__wakeup_seq)
41 /* Yes. Mark one of them as woken. */
42 ++cond->__data.__wakeup_seq;
43 ++cond->__data.__futex;
46 if (! __builtin_expect (lll_futex_wake_unlock (&cond->__data.__futex, 1,
47 1, &cond->__data.__lock,
48 // XYZ check mutex flag
53 lll_futex_wake (&cond->__data.__futex, 1,
54 // XYZ check mutex flag
59 lll_mutex_unlock (cond->__data.__lock);
64 versioned_symbol (libpthread, __pthread_cond_signal, pthread_cond_signal,