sysdeps/mach/htl/bits/spin-lock-inline.h

   1 /* Definitions of user-visible names for spin locks.
   2    Copyright (C) 1994-2018 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _BITS_SPIN_LOCK_INLINE_H
  20 #define _BITS_SPIN_LOCK_INLINE_H        1
  21
  22 #include <features.h>
  23 #include <bits/types/__pthread_spinlock_t.h>
  24 #include <lock-intern.h>   /* This does all the work.  */
  25
  26 __BEGIN_DECLS
  27
  28 #if defined __USE_EXTERN_INLINES || defined _FORCE_INLINES
  29
  30 # ifndef __EBUSY
  31 #  include <errno.h>
  32 #  define __EBUSY EBUSY
  33 # endif
  34
  35 # ifndef __PT_SPIN_INLINE
  36 #  define __PT_SPIN_INLINE __extern_inline
  37 # endif
  38
  39 __PT_SPIN_INLINE int __pthread_spin_destroy (__pthread_spinlock_t *__lock);
  40
  41 __PT_SPIN_INLINE int
  42 __pthread_spin_destroy (__pthread_spinlock_t *__lock)
  43 {
  44   return 0;
  45 }
  46
  47 __PT_SPIN_INLINE int __pthread_spin_init (__pthread_spinlock_t *__lock,
  48                                           int __pshared);
  49
  50 __PT_SPIN_INLINE int
  51 __pthread_spin_init (__pthread_spinlock_t *__lock, int __pshared)
  52 {
  53   *__lock = __PTHREAD_SPIN_LOCK_INITIALIZER;
  54   return 0;
  55 }
  56
  57 __PT_SPIN_INLINE int __pthread_spin_trylock (__pthread_spinlock_t *__lock);
  58
  59 __PT_SPIN_INLINE int
  60 __pthread_spin_trylock (__pthread_spinlock_t *__lock)
  61 {
  62   return __spin_try_lock ((__spin_lock_t *) __lock) ? 0 : __EBUSY;
  63 }
  64
  65 __PT_SPIN_INLINE int __pthread_spin_lock (__pthread_spinlock_t *__lock);
  66
  67 __PT_SPIN_INLINE int
  68 __pthread_spin_lock (__pthread_spinlock_t *__lock)
  69 {
  70   __spin_lock ((__spin_lock_t *) __lock);
  71   return 0;
  72 }
  73
  74 __PT_SPIN_INLINE int __pthread_spin_unlock (__pthread_spinlock_t *__lock);
  75
  76 __PT_SPIN_INLINE int
  77 __pthread_spin_unlock (__pthread_spinlock_t *__lock)
  78 {
  79   __spin_unlock ((__spin_lock_t *) __lock);
  80   return 0;
  81 }
  82
  83 #endif /* Use extern inlines or force inlines.  */
  84
  85 __END_DECLS
  86
  87 #endif /* bits/types/__pthread_spinlock_t.h */