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Editing: pthreadtypes.h

/* Declaration of common pthread types for all architectures.
   Copyright (C) 2017-2018 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 _BITS_PTHREADTYPES_COMMON_H
# define _BITS_PTHREADTYPES_COMMON_H	1

/* For internal mutex and condition variable definitions.  */
#include <bits/thread-shared-types.h>

/* Thread identifiers.  The structure of the attribute type is not
   exposed on purpose.  */
typedef unsigned long int pthread_t;

/* Data structures for mutex handling.  The structure of the attribute
   type is not exposed on purpose.  */
typedef union
{
  char __size[__SIZEOF_PTHREAD_MUTEXATTR_T];
  int __align;
} pthread_mutexattr_t;

/* Data structure for condition variable handling.  The structure of
   the attribute type is not exposed on purpose.  */
typedef union
{
  char __size[__SIZEOF_PTHREAD_CONDATTR_T];
  int __align;
} pthread_condattr_t;

/* Keys for thread-specific data */
typedef unsigned int pthread_key_t;

/* Once-only execution */
typedef int __ONCE_ALIGNMENT pthread_once_t;

union pthread_attr_t
{
  char __size[__SIZEOF_PTHREAD_ATTR_T];
  long int __align;
};
#ifndef __have_pthread_attr_t
typedef union pthread_attr_t pthread_attr_t;
# define __have_pthread_attr_t 1
#endif

typedef union
{
  struct __pthread_mutex_s __data;
  char __size[__SIZEOF_PTHREAD_MUTEX_T];
  long int __align;
} pthread_mutex_t;

typedef union
{
  struct __pthread_cond_s __data;
  char __size[__SIZEOF_PTHREAD_COND_T];
  __extension__ long long int __align;
} pthread_cond_t;

#if defined __USE_UNIX98 || defined __USE_XOPEN2K
/* Data structure for reader-writer lock variable handling.  The
   structure of the attribute type is deliberately not exposed.  */
typedef union
{
  struct __pthread_rwlock_arch_t __data;
  char __size[__SIZEOF_PTHREAD_RWLOCK_T];
  long int __align;
} pthread_rwlock_t;

typedef union
{
  char __size[__SIZEOF_PTHREAD_RWLOCKATTR_T];
  long int __align;
} pthread_rwlockattr_t;
#endif

#ifdef __USE_XOPEN2K
/* POSIX spinlock data type.  */
typedef volatile int pthread_spinlock_t;

/* POSIX barriers data type.  The structure of the type is
   deliberately not exposed.  */
typedef union
{
  char __size[__SIZEOF_PTHREAD_BARRIER_T];
  long int __align;
} pthread_barrier_t;

typedef union
{
  char __size[__SIZEOF_PTHREAD_BARRIERATTR_T];
  int __align;
} pthread_barrierattr_t;
#endif

#endif

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