46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/* Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <pthreadP.h>
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int
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pthread_mutexattr_setpshared (attr, pshared)
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pthread_mutexattr_t *attr;
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int pshared;
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{
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struct pthread_mutexattr *iattr;
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if (pshared != PTHREAD_PROCESS_PRIVATE
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&& __builtin_expect (pshared != PTHREAD_PROCESS_SHARED, 0))
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return EINVAL;
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iattr = (struct pthread_mutexattr *) attr;
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/* We use bit 31 to signal whether the mutex is going to be
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process-shared or not. */
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if (pshared == PTHREAD_PROCESS_PRIVATE)
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iattr->mutexkind &= ~0x80000000;
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else
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iattr->mutexkind |= 0x80000000;
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return 0;
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}
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