ARK-OS/arkos/system/sysroot/usr/include/bits/struct_mutex.h

//
// Copyright 2026 Aarav Ravindra Kharade
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

/* x86 internal mutex struct definitions.
   Copyright (C) 2019-2026 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef _THREAD_MUTEX_INTERNAL_H
#define _THREAD_MUTEX_INTERNAL_H 1

struct __pthread_mutex_s
{
  int __lock;
  unsigned int __count;
  int __owner;
#ifdef __x86_64__
  unsigned int __nusers;
#endif
  /* KIND must stay at this position in the structure to maintain
     binary compatibility with static initializers.  */
  int __kind;
#ifdef __x86_64__
  short __spins;
  short __unused;
  __pthread_list_t __list;
# define __PTHREAD_MUTEX_HAVE_PREV      1
#else
  unsigned int __nusers;
  __extension__ union
  {
    struct
    {
      short __data_spins;
      short __data_unused;
# define __spins __data.__data_spins
    } __data;
    __pthread_slist_t __list;
  };
# define __PTHREAD_MUTEX_HAVE_PREV      0
#endif
};

#ifdef __x86_64__
# define __PTHREAD_MUTEX_INITIALIZER(__kind) \
  0, 0, 0, 0, __kind, 0, 0, { NULL, NULL }
#else
# define __PTHREAD_MUTEX_INITIALIZER(__kind) \
  0, 0, 0, __kind, 0, { { 0, 0 } }
#endif

#endif