72 lines
2.5 KiB
C
72 lines
2.5 KiB
C
/* Copyright (C) 2002-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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, see
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<https://www.gnu.org/licenses/>. */
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#include "pthreadP.h"
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#include <string.h>
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#include <pthread-offsets.h>
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#include <shlib-compat.h>
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static const struct pthread_rwlockattr default_rwlockattr =
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{
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.lockkind = PTHREAD_RWLOCK_DEFAULT_NP,
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.pshared = PTHREAD_PROCESS_PRIVATE
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};
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/* See pthread_rwlock_common.c. */
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int
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___pthread_rwlock_init (pthread_rwlock_t *rwlock,
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const pthread_rwlockattr_t *attr)
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{
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ASSERT_TYPE_SIZE (pthread_rwlock_t, __SIZEOF_PTHREAD_RWLOCK_T);
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/* The __flags is the only field where its offset should be checked to
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avoid ABI breakage with static initializers. */
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ASSERT_PTHREAD_INTERNAL_OFFSET (pthread_rwlock_t, __data.__flags,
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__PTHREAD_RWLOCK_FLAGS_OFFSET);
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ASSERT_PTHREAD_INTERNAL_MEMBER_SIZE (pthread_rwlock_t, __data.__flags,
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int);
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const struct pthread_rwlockattr *iattr;
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iattr = ((const struct pthread_rwlockattr *) attr) ?: &default_rwlockattr;
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memset (rwlock, '\0', sizeof (*rwlock));
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rwlock->__data.__flags = iattr->lockkind;
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/* The value of __SHARED in a private rwlock must be zero. */
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rwlock->__data.__shared = (iattr->pshared != PTHREAD_PROCESS_PRIVATE);
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return 0;
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}
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versioned_symbol (libc, ___pthread_rwlock_init, pthread_rwlock_init,
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GLIBC_2_34);
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libc_hidden_ver (___pthread_rwlock_init, __pthread_rwlock_init)
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#ifndef SHARED
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strong_alias (___pthread_rwlock_init, __pthread_rwlock_init)
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#endif
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#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_1, GLIBC_2_34)
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compat_symbol (libpthread, ___pthread_rwlock_init, pthread_rwlock_init,
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GLIBC_2_1);
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#endif
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#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34)
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compat_symbol (libpthread, ___pthread_rwlock_init, __pthread_rwlock_init,
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GLIBC_2_2);
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#endif
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