sysdeps/nptl/bits/pthreadtypes.h

   1 /* Declaration of common pthread types for all architectures.
   2    Copyright (C) 2017-2021 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