sysdeps/x86/bits/pthreadtypes.h

   1 /* Copyright (C) 2002-2015 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _BITS_PTHREADTYPES_H
  19 #define _BITS_PTHREADTYPES_H    1
  20
  21 #include <bits/wordsize.h>
  22
  23 #ifdef __x86_64__
  24 # if __WORDSIZE == 64
  25 #  define __SIZEOF_PTHREAD_ATTR_T 56
  26 #  define __SIZEOF_PTHREAD_MUTEX_T 40
  27 #  define __SIZEOF_PTHREAD_MUTEXATTR_T 4
  28 #  define __SIZEOF_PTHREAD_COND_T 48
  29 #  define __SIZEOF_PTHREAD_CONDATTR_T 4
  30 #  define __SIZEOF_PTHREAD_RWLOCK_T 56
  31 #  define __SIZEOF_PTHREAD_RWLOCKATTR_T 8
  32 #  define __SIZEOF_PTHREAD_BARRIER_T 32
  33 #  define __SIZEOF_PTHREAD_BARRIERATTR_T 4
  34 # else
  35 #  define __SIZEOF_PTHREAD_ATTR_T 32
  36 #  define __SIZEOF_PTHREAD_MUTEX_T 32
  37 #  define __SIZEOF_PTHREAD_MUTEXATTR_T 4
  38 #  define __SIZEOF_PTHREAD_COND_T 48
  39 #  define __SIZEOF_PTHREAD_CONDATTR_T 4
  40 #  define __SIZEOF_PTHREAD_RWLOCK_T 44
  41 #  define __SIZEOF_PTHREAD_RWLOCKATTR_T 8
  42 #  define __SIZEOF_PTHREAD_BARRIER_T 20
  43 #  define __SIZEOF_PTHREAD_BARRIERATTR_T 4
  44 # endif
  45 #else
  46 # define __SIZEOF_PTHREAD_ATTR_T 36
  47 # define __SIZEOF_PTHREAD_MUTEX_T 24
  48 # define __SIZEOF_PTHREAD_MUTEXATTR_T 4
  49 # define __SIZEOF_PTHREAD_COND_T 48
  50 # define __SIZEOF_PTHREAD_CONDATTR_T 4
  51 # define __SIZEOF_PTHREAD_RWLOCK_T 32
  52 # define __SIZEOF_PTHREAD_RWLOCKATTR_T 8
  53 # define __SIZEOF_PTHREAD_BARRIER_T 20
  54 # define __SIZEOF_PTHREAD_BARRIERATTR_T 4
  55 #endif
  56
  57
  58 /* Thread identifiers.  The structure of the attribute type is not
  59    exposed on purpose.  */
  60 typedef unsigned long int pthread_t;
  61
  62
  63 union pthread_attr_t
  64 {
  65   char __size[__SIZEOF_PTHREAD_ATTR_T];
  66   long int __align;
  67 };
  68 #ifndef __have_pthread_attr_t
  69 typedef union pthread_attr_t pthread_attr_t;
  70 # define __have_pthread_attr_t  1
  71 #endif
  72
  73
  74 #ifdef __x86_64__
  75 typedef struct __pthread_internal_list
  76 {
  77   struct __pthread_internal_list *__prev;
  78   struct __pthread_internal_list *__next;
  79 } __pthread_list_t;
  80 #else
  81 typedef struct __pthread_internal_slist
  82 {
  83   struct __pthread_internal_slist *__next;
  84 } __pthread_slist_t;
  85 #endif
  86
  87
  88 /* Data structures for mutex handling.  The structure of the attribute
  89    type is not exposed on purpose.  */
  90 typedef union
  91 {
  92   struct __pthread_mutex_s
  93   {
  94     int __lock;
  95     unsigned int __count;
  96     int __owner;
  97 #ifdef __x86_64__
  98     unsigned int __nusers;
  99 #endif
 100     /* KIND must stay at this position in the structure to maintain
 101        binary compatibility.  */
 102     int __kind;
 103 #ifdef __x86_64__
 104     short __spins;
 105     short __elision;
 106     __pthread_list_t __list;
 107 # define __PTHREAD_MUTEX_HAVE_PREV      1
 108 /* Mutex __spins initializer used by PTHREAD_MUTEX_INITIALIZER.  */
 109 # define __PTHREAD_SPINS             0, 0
 110 #else
 111     unsigned int __nusers;
 112     __extension__ union
 113     {
 114       struct
 115       {
 116         short __espins;
 117         short __elision;
 118 # define __spins __elision_data.__espins
 119 # define __elision __elision_data.__elision
 120 # define __PTHREAD_SPINS         { 0, 0 }
 121       } __elision_data;
 122       __pthread_slist_t __list;
 123     };
 124 #endif
 125   } __data;
 126   char __size[__SIZEOF_PTHREAD_MUTEX_T];
 127   long int __align;
 128 } pthread_mutex_t;
 129
 130 typedef union
 131 {
 132   char __size[__SIZEOF_PTHREAD_MUTEXATTR_T];
 133   int __align;
 134 } pthread_mutexattr_t;
 135
 136
 137 /* Data structure for conditional variable handling.  The structure of
 138    the attribute type is not exposed on purpose.  */
 139 typedef union
 140 {
 141   struct
 142   {
 143     int __lock;
 144     unsigned int __futex;
 145     __extension__ unsigned long long int __total_seq;
 146     __extension__ unsigned long long int __wakeup_seq;
 147     __extension__ unsigned long long int __woken_seq;
 148     void *__mutex;
 149     unsigned int __nwaiters;
 150     unsigned int __broadcast_seq;
 151   } __data;
 152   char __size[__SIZEOF_PTHREAD_COND_T];
 153   __extension__ long long int __align;
 154 } pthread_cond_t;
 155
 156 typedef union
 157 {
 158   char __size[__SIZEOF_PTHREAD_CONDATTR_T];
 159   int __align;
 160 } pthread_condattr_t;
 161
 162
 163 /* Keys for thread-specific data */
 164 typedef unsigned int pthread_key_t;
 165
 166
 167 /* Once-only execution */
 168 typedef int pthread_once_t;
 169
 170
 171 #if defined __USE_UNIX98 || defined __USE_XOPEN2K
 172 /* Data structure for read-write lock variable handling.  The
 173    structure of the attribute type is not exposed on purpose.  */
 174 typedef union
 175 {
 176 # ifdef __x86_64__
 177   struct
 178   {
 179     int __lock;
 180     unsigned int __nr_readers;
 181     unsigned int __readers_wakeup;
 182     unsigned int __writer_wakeup;
 183     unsigned int __nr_readers_queued;
 184     unsigned int __nr_writers_queued;
 185     int __writer;
 186     int __shared;
 187     signed char __rwelision;
 188 #  ifdef  __ILP32__
 189     unsigned char __pad1[3];
 190 #    define __PTHREAD_RWLOCK_ELISION_EXTRA 0, { 0, 0, 0 }
 191 #  else
 192     unsigned char __pad1[7];
 193 #    define __PTHREAD_RWLOCK_ELISION_EXTRA 0, { 0, 0, 0, 0, 0, 0, 0 }
 194 #  endif
 195     unsigned long int __pad2;
 196     /* FLAGS must stay at this position in the structure to maintain
 197        binary compatibility.  */
 198     unsigned int __flags;
 199 # define __PTHREAD_RWLOCK_INT_FLAGS_SHARED      1
 200   } __data;
 201 # else
 202   struct
 203   {
 204     int __lock;
 205     unsigned int __nr_readers;
 206     unsigned int __readers_wakeup;
 207     unsigned int __writer_wakeup;
 208     unsigned int __nr_readers_queued;
 209     unsigned int __nr_writers_queued;
 210     /* FLAGS must stay at this position in the structure to maintain
 211        binary compatibility.  */
 212     unsigned char __flags;
 213     unsigned char __shared;
 214     signed char __rwelision;
 215 # define __PTHREAD_RWLOCK_ELISION_EXTRA 0
 216     unsigned char __pad2;
 217     int __writer;
 218   } __data;
 219 # endif
 220   char __size[__SIZEOF_PTHREAD_RWLOCK_T];
 221   long int __align;
 222 } pthread_rwlock_t;
 223
 224 typedef union
 225 {
 226   char __size[__SIZEOF_PTHREAD_RWLOCKATTR_T];
 227   long int __align;
 228 } pthread_rwlockattr_t;
 229 #endif
 230
 231
 232 #ifdef __USE_XOPEN2K
 233 /* POSIX spinlock data type.  */
 234 typedef volatile int pthread_spinlock_t;
 235
 236
 237 /* POSIX barriers data type.  The structure of the type is
 238    deliberately not exposed.  */
 239 typedef union
 240 {
 241   char __size[__SIZEOF_PTHREAD_BARRIER_T];
 242   long int __align;
 243 } pthread_barrier_t;
 244
 245 typedef union
 246 {
 247   char __size[__SIZEOF_PTHREAD_BARRIERATTR_T];
 248   int __align;
 249 } pthread_barrierattr_t;
 250 #endif
 251
 252
 253 #ifndef __x86_64__
 254 /* Extra attributes for the cleanup functions.  */
 255 # define __cleanup_fct_attribute __attribute__ ((__regparm__ (1)))
 256 #endif
 257
 258 #endif  /* bits/pthreadtypes.h */