Optimize for kernels which are known to have the vfork syscall.
[glibc/pb-stable.git] / nptl / pthread_mutexattr_settype.c
blob54021b37c665e2978bb743210de3715a27ffabe6
1 /* Copyright (C) 2002 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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
18 02111-1307 USA. */
20 #include <errno.h>
21 #include <pthreadP.h>
24 int
25 __pthread_mutexattr_settype (attr, kind)
26 pthread_mutexattr_t *attr;
27 int kind;
29 struct pthread_mutexattr *iattr;
31 if (kind < PTHREAD_MUTEX_NORMAL || kind > PTHREAD_MUTEX_ADAPTIVE_NP)
32 return EINVAL;
34 iattr = (struct pthread_mutexattr *) attr;
36 /* We use bit 31 to single whether the mutex is going to be
37 process-shared or not. */
38 iattr->mutexkind = (iattr->mutexkind & 0x80000000) | kind;
40 return 0;
42 weak_alias (__pthread_mutexattr_settype, pthread_mutexattr_setkind_np)
43 strong_alias (__pthread_mutexattr_settype, pthread_mutexattr_settype)