1  /* Change priority protocol setting in pthread_mutexattr_t.
       2     Copyright (C) 2006-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       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.
       9  
      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.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <errno.h>
      20  #include <pthreadP.h>
      21  #include <shlib-compat.h>
      22  
      23  int
      24  __pthread_mutexattr_setprotocol (pthread_mutexattr_t *attr, int protocol)
      25  {
      26    if (protocol != PTHREAD_PRIO_NONE
      27        && protocol != PTHREAD_PRIO_INHERIT
      28        && __builtin_expect (protocol != PTHREAD_PRIO_PROTECT, 0))
      29      return EINVAL;
      30  
      31    struct pthread_mutexattr *iattr = (struct pthread_mutexattr *) attr;
      32  
      33    iattr->mutexkind = ((iattr->mutexkind & ~PTHREAD_MUTEXATTR_PROTOCOL_MASK)
      34  		      | (protocol << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT));
      35  
      36    return 0;
      37  }
      38  versioned_symbol (libc, __pthread_mutexattr_setprotocol,
      39  		  pthread_mutexattr_setprotocol, GLIBC_2_34);
      40  
      41  #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_4, GLIBC_2_34)
      42  compat_symbol (libpthread, __pthread_mutexattr_setprotocol,
      43                 pthread_mutexattr_setprotocol, GLIBC_2_4);
      44  #endif