1  /* Declaration of common pthread types for all architectures.
       2     Copyright (C) 2017-2023 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  
      19  #ifndef _BITS_PTHREADTYPES_COMMON_H
      20  # define _BITS_PTHREADTYPES_COMMON_H	1
      21  
      22  /* For internal mutex and condition variable definitions.  */
      23  #include <bits/thread-shared-types.h>
      24  
      25  /* Thread identifiers.  The structure of the attribute type is not
      26     exposed on purpose.  */
      27  typedef unsigned long int pthread_t;
      28  
      29  
      30  /* Data structures for mutex handling.  The structure of the attribute
      31     type is not exposed on purpose.  */
      32  typedef union
      33  {
      34    char __size[__SIZEOF_PTHREAD_MUTEXATTR_T];
      35    int __align;
      36  } pthread_mutexattr_t;
      37  
      38  
      39  /* Data structure for condition variable handling.  The structure of
      40     the attribute type is not exposed on purpose.  */
      41  typedef union
      42  {
      43    char __size[__SIZEOF_PTHREAD_CONDATTR_T];
      44    int __align;
      45  } pthread_condattr_t;
      46  
      47  
      48  /* Keys for thread-specific data */
      49  typedef unsigned int pthread_key_t;
      50  
      51  
      52  /* Once-only execution */
      53  typedef int __ONCE_ALIGNMENT pthread_once_t;
      54  
      55  
      56  union pthread_attr_t
      57  {
      58    char __size[__SIZEOF_PTHREAD_ATTR_T];
      59    long int __align;
      60  };
      61  #ifndef __have_pthread_attr_t
      62  typedef union pthread_attr_t pthread_attr_t;
      63  # define __have_pthread_attr_t 1
      64  #endif
      65  
      66  
      67  typedef union
      68  {
      69    struct __pthread_mutex_s __data;
      70    char __size[__SIZEOF_PTHREAD_MUTEX_T];
      71    long int __align;
      72  } pthread_mutex_t;
      73  
      74  
      75  typedef union
      76  {
      77    struct __pthread_cond_s __data;
      78    char __size[__SIZEOF_PTHREAD_COND_T];
      79    __extension__ long long int __align;
      80  } pthread_cond_t;
      81  
      82  
      83  #if defined __USE_UNIX98 || defined __USE_XOPEN2K
      84  /* Data structure for reader-writer lock variable handling.  The
      85     structure of the attribute type is deliberately not exposed.  */
      86  typedef union
      87  {
      88    struct __pthread_rwlock_arch_t __data;
      89    char __size[__SIZEOF_PTHREAD_RWLOCK_T];
      90    long int __align;
      91  } pthread_rwlock_t;
      92  
      93  typedef union
      94  {
      95    char __size[__SIZEOF_PTHREAD_RWLOCKATTR_T];
      96    long int __align;
      97  } pthread_rwlockattr_t;
      98  #endif
      99  
     100  
     101  #ifdef __USE_XOPEN2K
     102  /* POSIX spinlock data type.  */
     103  typedef volatile int pthread_spinlock_t;
     104  
     105  
     106  /* POSIX barriers data type.  The structure of the type is
     107     deliberately not exposed.  */
     108  typedef union
     109  {
     110    char __size[__SIZEOF_PTHREAD_BARRIER_T];
     111    long int __align;
     112  } pthread_barrier_t;
     113  
     114  typedef union
     115  {
     116    char __size[__SIZEOF_PTHREAD_BARRIERATTR_T];
     117    int __align;
     118  } pthread_barrierattr_t;
     119  #endif
     120  
     121  #endif