1  /* Pthread mutex backoff configuration.
       2     Copyright (C) 2022-2023 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  #ifndef _PTHREAD_MUTEX_BACKOFF_H
      19  #define _PTHREAD_MUTEX_BACKOFF_H 1
      20  
      21  static inline unsigned int
      22  get_jitter (void)
      23  {
      24    /* Arch dependent random jitter, return 0 disables random.  */
      25    return 0;
      26  }
      27  
      28  static inline int
      29  get_next_backoff (int backoff)
      30  {
      31    /* Next backoff, return 1 disables mutex backoff.  */
      32    return 1;
      33  }
      34  
      35  #endif