Add adaptive elision to rwlocks

[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / alpha / bits / pthreadtypes.h

/* Machine-specific pthread type layouts.  Alpha version.
   Copyright (C) 2003-2014 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_H
#define _BITS_PTHREADTYPES_H	1

#define __SIZEOF_PTHREAD_ATTR_T		56
#define __SIZEOF_PTHREAD_MUTEX_T	40
#define __SIZEOF_PTHREAD_MUTEXATTR_T	4
#define __SIZEOF_PTHREAD_COND_T		48
#define __SIZEOF_PTHREAD_CONDATTR_T	4
#define __SIZEOF_PTHREAD_RWLOCK_T	56
#define __SIZEOF_PTHREAD_RWLOCKATTR_T	8
#define __SIZEOF_PTHREAD_BARRIER_T	32
#define __SIZEOF_PTHREAD_BARRIERATTR_T	4


/* Thread identifiers.  The structure of the attribute type is
   deliberately not exposed.  */
typedef unsigned long int pthread_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 struct __pthread_internal_list
{
  struct __pthread_internal_list *__prev;
  struct __pthread_internal_list *__next;
} __pthread_list_t;


/* Data structures for mutex handling.  The structure of the attribute
   type is deliberately not exposed.  */
typedef union
{
  struct __pthread_mutex_s
  {
    int __lock;
    unsigned int __count;
    int __owner;
    unsigned int __nusers;
    /* KIND must stay at this position in the structure to maintain
       binary compatibility.  */
    int __kind;
    int __spins;
    __pthread_list_t __list;
#define __PTHREAD_MUTEX_HAVE_PREV	1
  } __data;
  char __size[__SIZEOF_PTHREAD_MUTEX_T];
  long int __align;
} pthread_mutex_t;

/* Mutex __spins initializer used by PTHREAD_MUTEX_INITIALIZER.  */
#define __PTHREAD_SPINS 0

typedef union
{
  char __size[__SIZEOF_PTHREAD_MUTEXATTR_T];
  int __align;
} pthread_mutexattr_t;


/* Data structure for conditional variable handling.  The structure of
   the attribute type is deliberately not exposed.  */
typedef union
{
  struct
  {
    int __lock;
    unsigned int __futex;
    __extension__ unsigned long long int __total_seq;
    __extension__ unsigned long long int __wakeup_seq;
    __extension__ unsigned long long int __woken_seq;
    void *__mutex;
    unsigned int __nwaiters;
    unsigned int __broadcast_seq;
  } __data;
  char __size[__SIZEOF_PTHREAD_COND_T];
  __extension__ long long int __align;
} pthread_cond_t;

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 pthread_once_t;


#if defined __USE_UNIX98 || defined __USE_XOPEN2K
/* Data structure for read-write lock variable handling.  The
   structure of the attribute type is deliberately not exposed.  */
typedef union
{
  struct
  {
    int __lock;
    unsigned int __nr_readers;
    unsigned int __readers_wakeup;
    unsigned int __writer_wakeup;
    unsigned int __nr_readers_queued;
    unsigned int __nr_writers_queued;
    int __writer;
    int __shared;
    unsigned long int __pad1;
    unsigned long int __pad2;
    /* FLAGS must stay at this position in the structure to maintain
       binary compatibility.  */
    unsigned int __flags;
  } __data;
  char __size[__SIZEOF_PTHREAD_RWLOCK_T];
  long int __align;
} pthread_rwlock_t;

#define __PTHREAD_RWLOCK_ELISION_EXTRA 0

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	/* bits/pthreadtypes.h */