1  /* Copyright (C) 2005-2023 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 <errno.h>
      19  #include <pthreadP.h>
      20  #include <shlib-compat.h>
      21  
      22  int
      23  __pthread_mutexattr_setrobust (pthread_mutexattr_t *attr, int robustness)
      24  {
      25    if (robustness != PTHREAD_MUTEX_STALLED_NP
      26        && __builtin_expect (robustness != PTHREAD_MUTEX_ROBUST_NP, 0))
      27      return EINVAL;
      28  
      29    struct pthread_mutexattr *iattr = (struct pthread_mutexattr *) attr;
      30  
      31    /* We use bit 30 to signal whether the mutex is going to be
      32       robust or not.  */
      33    if (robustness == PTHREAD_MUTEX_STALLED_NP)
      34      iattr->mutexkind &= ~PTHREAD_MUTEXATTR_FLAG_ROBUST;
      35    else
      36      iattr->mutexkind |= PTHREAD_MUTEXATTR_FLAG_ROBUST;
      37  
      38    return 0;
      39  }
      40  versioned_symbol (libc, __pthread_mutexattr_setrobust,
      41                    pthread_mutexattr_setrobust, GLIBC_2_34);
      42  
      43  #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_4, GLIBC_2_34)
      44  compat_symbol (libpthread, __pthread_mutexattr_setrobust,
      45                 pthread_mutexattr_setrobust_np, GLIBC_2_4);
      46  #endif
      47  
      48  #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_12, GLIBC_2_34)
      49  compat_symbol (libpthread, __pthread_mutexattr_setrobust,
      50                 pthread_mutexattr_setrobust, GLIBC_2_12);
      51  #endif