sysdeps/powerpc/nptl/bits/struct_mutex.h

   1 /* PowerPC internal mutex struct definitions.
   2    Copyright (C) 2019-2023 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _THREAD_MUTEX_INTERNAL_H
  20 #define _THREAD_MUTEX_INTERNAL_H 1
  21
  22 struct __pthread_mutex_s
  23 {
  24   int __lock;
  25   unsigned int __count;
  26   int __owner;
  27 #if __WORDSIZE == 64
  28   unsigned int __nusers;
  29 #endif
  30   /* KIND must stay at this position in the structure to maintain
  31      binary compatibility with static initializers.  */
  32   int __kind;
  33 #if __WORDSIZE == 64
  34   short __spins;
  35   short __elision;
  36   __pthread_list_t __list;
  37 # define __PTHREAD_MUTEX_HAVE_PREV      1
  38 #else
  39   unsigned int __nusers;
  40   __extension__ union
  41   {
  42     struct
  43     {
  44       short __espins;
  45       short __elision;
  46 # define __spins __elision_data.__espins
  47 # define __elision __elision_data.__elision
  48     } __elision_data;
  49     __pthread_slist_t __list;
  50   };
  51 # define __PTHREAD_MUTEX_HAVE_PREV      0
  52 #endif
  53 };
  54
  55 #if __WORDSIZE == 64
  56 # define __PTHREAD_MUTEX_INITIALIZER(__kind) \
  57   0, 0, 0, 0, __kind, 0, 0, { 0, 0 }
  58 #else
  59 # define __PTHREAD_MUTEX_INITIALIZER(__kind) \
  60   0, 0, 0, __kind, 0, { { 0, 0 } }
  61 #endif
  62
  63 #endif