nptl/pthread_mutexattr_init.c

   1 /* Copyright (C) 2002-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <string.h>
  19 #include <pthreadP.h>
  20 #include <shlib-compat.h>
  21
  22 int
  23 ___pthread_mutexattr_init (pthread_mutexattr_t *attr)
  24 {
  25   ASSERT_TYPE_SIZE (pthread_mutexattr_t, __SIZEOF_PTHREAD_MUTEXATTR_T);
  26   ASSERT_PTHREAD_INTERNAL_SIZE (pthread_mutexattr_t,
  27                                 struct pthread_mutexattr);
  28
  29   if (sizeof (struct pthread_mutexattr) != sizeof (pthread_mutexattr_t))
  30     memset (attr, '\0', sizeof (*attr));
  31
  32   /* We use bit 31 to signal whether the mutex is going to be
  33      process-shared or not.  By default it is zero, i.e., the mutex is
  34      not process-shared.  */
  35   ((struct pthread_mutexattr *) attr)->mutexkind = PTHREAD_MUTEX_NORMAL;
  36
  37   return 0;
  38 }
  39 versioned_symbol (libc, ___pthread_mutexattr_init,
  40                   pthread_mutexattr_init, GLIBC_2_34);
  41 libc_hidden_ver (___pthread_mutexattr_init, __pthread_mutexattr_init)
  42 #ifndef SHARED
  43 strong_alias (___pthread_mutexattr_init, __pthread_mutexattr_init)
  44 #endif
  45
  46 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_34)
  47 compat_symbol (libpthread, ___pthread_mutexattr_init,
  48                pthread_mutexattr_init, GLIBC_2_0);
  49 compat_symbol (libpthread, ___pthread_mutexattr_init,
  50                __pthread_mutexattr_init, GLIBC_2_0);
  51 #endif