sysdeps/hppa/nptl/bits/pthreadtypes-arch.h

   1 /* Copyright (C) 2005-2019 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    <https://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _BITS_PTHREADTYPES_ARCH_H
  19 #define _BITS_PTHREADTYPES_ARCH_H       1
  20
  21 /* Linuxthread type sizes (bytes):
  22    sizeof(pthread_attr_t) = 0x24 (36)
  23    sizeof(pthread_barrier_t) = 0x30 (48)
  24    sizeof(pthread_barrierattr_t) = 0x4 (4)
  25    sizeof(pthread_cond_t) = 0x30 (48)
  26    sizeof(pthread_condattr_t) = 0x4 (4)
  27    sizeof(pthread_mutex_t) = 0x30 (48)
  28    sizeof(pthread_mutexattr_t) = 0x4 (4)
  29    sizeof(pthread_rwlock_t) = 0x40 (64)
  30    sizeof(pthread_rwlockattr_t) = 0x8 (8)
  31    sizeof(pthread_spinlock_t) = 0x10 (16) */
  32
  33 #define __SIZEOF_PTHREAD_ATTR_T 36
  34 #define __SIZEOF_PTHREAD_MUTEX_T 48
  35 #define __SIZEOF_PTHREAD_BARRIER_T 48
  36 #define __SIZEOF_PTHREAD_BARRIERATTR_T 4
  37 #define __SIZEOF_PTHREAD_COND_T 48
  38 #define __SIZEOF_PTHREAD_CONDATTR_T 4
  39 #define __SIZEOF_PTHREAD_MUTEXATTR_T 4
  40 #define __SIZEOF_PTHREAD_RWLOCK_T 64
  41 #define __SIZEOF_PTHREAD_RWLOCKATTR_T 8
  42
  43 /* The old 4-word 16-byte aligned lock. This is initalized
  44    to all ones by the Linuxthreads PTHREAD_MUTEX_INITIALIZER.
  45    Unused in NPTL.  */
  46 #define __PTHREAD_COMPAT_PADDING_MID  int __compat_padding[4];
  47 /* Two more words are left before the NPTL
  48    pthread_mutex_t is larger than Linuxthreads.  */
  49 #define __PTHREAD_COMPAT_PADDING_END  int __reserved[2];
  50 #define __PTHREAD_MUTEX_LOCK_ELISION    0
  51 #define __PTHREAD_MUTEX_NUSERS_AFTER_KIND  1
  52 #define __PTHREAD_MUTEX_USE_UNION          1
  53
  54 #define __LOCK_ALIGNMENT __attribute__ ((__aligned__(16)))
  55 #define __ONCE_ALIGNMENT
  56
  57 struct __pthread_rwlock_arch_t
  58 {
  59   /* In the old Linuxthreads pthread_rwlock_t, this is the
  60      start of the 4-word 16-byte aligned lock structure. The
  61      next four words are all set to 1 by the Linuxthreads
  62      PTHREAD_RWLOCK_INITIALIZER. We ignore them in NPTL.  */
  63   int __compat_padding[4] __attribute__ ((__aligned__(16)));
  64   unsigned int __readers;
  65   unsigned int __writers;
  66   unsigned int __wrphase_futex;
  67   unsigned int __writers_futex;
  68   unsigned int __pad3;
  69   unsigned int __pad4;
  70   int __cur_writer;
  71   /* An unused word, reserved for future use. It was added
  72      to maintain the location of the flags from the Linuxthreads
  73      layout of this structure.  */
  74   int __reserved1;
  75   /* FLAGS must stay at this position in the structure to maintain
  76      binary compatibility.  */
  77   unsigned char __pad2;
  78   unsigned char __pad1;
  79   unsigned char __shared;
  80   unsigned char __flags;
  81   /* The NPTL pthread_rwlock_t is 4 words smaller than the
  82      Linuxthreads version. One word is in the middle of the
  83      structure, the other three are at the end.  */
  84   int __reserved2;
  85   int __reserved3;
  86   int __reserved4;
  87 };
  88
  89 #define __PTHREAD_RWLOCK_ELISION_EXTRA 0
  90
  91 #endif  /* bits/pthreadtypes.h */