ARK-OS/arkos/system/sysroot/usr/include/bits/struct_rwlock.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 rwlock 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 _RWLOCK_INTERNAL_H
#define _RWLOCK_INTERNAL_H

struct __pthread_rwlock_arch_t
{
  unsigned int __readers;
  unsigned int __writers;
  unsigned int __wrphase_futex;
  unsigned int __writers_futex;
  unsigned int __pad3;
  unsigned int __pad4;
#ifdef __x86_64__
  int __cur_writer;
  int __shared;
  unsigned long int __pad1;
  unsigned long int __pad2;
  /* FLAGS must stay at this position in the structure to maintain
     binary compatibility.  */
  unsigned int __flags;
#else /* __x86_64__  */
  /* FLAGS must stay at this position in the structure to maintain
     binary compatibility.  */
  unsigned char __flags;
  unsigned char __shared;
  unsigned char __pad1;
  unsigned char __pad2;
  int __cur_writer;
#endif
};

#ifdef __x86_64__
# define __PTHREAD_RWLOCK_INITIALIZER(__flags) \
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, __flags
#else
# define __PTHREAD_RWLOCK_INITIALIZER(__flags) \
  0, 0, 0, 0, 0, 0, __flags, 0, 0, 0, 0
#endif

#endif