sysdeps/htl/bits/types/struct___pthread_mutex.h

   1 /* Mutex type.  Generic version.
   2
   3    Copyright (C) 2000-2018 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library;  if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef _BITS_TYPES_STRUCT___PTHREAD_MUTEX_H
  21 #define _BITS_TYPES_STRUCT___PTHREAD_MUTEX_H    1
  22
  23 #include <bits/types/__pthread_spinlock_t.h>
  24 #include <bits/types/struct___pthread_mutexattr.h>
  25
  26 /* User visible part of a mutex.  */
  27 struct __pthread_mutex
  28 {
  29   __pthread_spinlock_t __held;
  30   __pthread_spinlock_t __lock;
  31   /* In cthreads, mutex_init does not initialized thre third
  32      pointer, as such, we cannot rely on its value for anything.  */
  33   char *__cthreadscompat1;
  34   struct __pthread *__queue;
  35   struct __pthread_mutexattr *__attr;
  36   void *__data;
  37   /*  Up to this point, we are completely compatible with cthreads
  38      and what libc expects.  */
  39   void *__owner;
  40   unsigned __locks;
  41   /* If NULL then the default attributes apply.  */
  42 };
  43
  44 /* Initializer for a mutex.  N.B.  this also happens to be compatible
  45    with the cthread mutex initializer.  */
  46 #define __PTHREAD_MUTEX_INITIALIZER \
  47     { __PTHREAD_SPIN_LOCK_INITIALIZER, __PTHREAD_SPIN_LOCK_INITIALIZER, 0, 0, 0, 0, 0, 0 }
  48
  49 #define __PTHREAD_ERRORCHECK_MUTEXATTR ((struct __pthread_mutexattr *) ((unsigned long) __PTHREAD_MUTEX_ERRORCHECK + 1))
  50
  51 #define __PTHREAD_ERRORCHECK_MUTEX_INITIALIZER \
  52     { __PTHREAD_SPIN_LOCK_INITIALIZER, __PTHREAD_SPIN_LOCK_INITIALIZER, 0, 0,   \
  53         __PTHREAD_ERRORCHECK_MUTEXATTR, 0, 0, 0 }
  54
  55 #define __PTHREAD_RECURSIVE_MUTEXATTR ((struct __pthread_mutexattr *) ((unsigned long) __PTHREAD_MUTEX_RECURSIVE + 1))
  56
  57 #define __PTHREAD_RECURSIVE_MUTEX_INITIALIZER \
  58     { __PTHREAD_SPIN_LOCK_INITIALIZER, __PTHREAD_SPIN_LOCK_INITIALIZER, 0, 0,   \
  59         __PTHREAD_RECURSIVE_MUTEXATTR, 0, 0, 0 }
  60
  61 #endif /* bits/types/struct___pthread_mutex.h */