/* Definitions of user-visible names for spin locks. Copyright (C) 1994, 1997, 2002 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #ifndef _BITS_SPIN_LOCK_H #define _BITS_SPIN_LOCK_H 1 #include #include /* This does all the work. */ __BEGIN_DECLS /* The type of a spin lock object. */ typedef __spin_lock_t __pthread_spinlock_t; /* Initializer for a spin lock object. */ #ifndef __SPIN_LOCK_INITIALIZER #error __SPIN_LOCK_INITIALIZER undefined: should be defined by . #endif #if defined __USE_EXTERN_INLINES || defined _FORCE_INLINES # ifndef __EBUSY # include # define __EBUSY EBUSY # endif # ifndef __PT_SPIN_INLINE # define __PT_SPIN_INLINE extern __inline # endif __PT_SPIN_INLINE int __pthread_spin_destroy (__pthread_spinlock_t *__lock); __PT_SPIN_INLINE int __pthread_spin_destroy (__pthread_spinlock_t *__lock) { return 0; } __PT_SPIN_INLINE int __pthread_spin_init (__pthread_spinlock_t *__lock, int __pshared); __PT_SPIN_INLINE int __pthread_spin_init (__pthread_spinlock_t *__lock, int __pshared) { *__lock = __SPIN_LOCK_INITIALIZER; return 0; } __PT_SPIN_INLINE int __pthread_spin_trylock (__pthread_spinlock_t *__lock); __PT_SPIN_INLINE int __pthread_spin_trylock (__pthread_spinlock_t *__lock) { return __spin_try_lock (__lock) ? 0 : __EBUSY; } extern inline int __pthread_spin_lock (__pthread_spinlock_t *__lock); extern int _pthread_spin_lock (__pthread_spinlock_t *__lock); extern inline int __pthread_spin_lock (__pthread_spinlock_t *__lock) { if (__pthread_spin_trylock (__lock)) return _pthread_spin_lock (__lock); return 0; } __PT_SPIN_INLINE int __pthread_spin_unlock (__pthread_spinlock_t *__lock); __PT_SPIN_INLINE int __pthread_spin_unlock (__pthread_spinlock_t *__lock) { __spin_unlock (__lock); return 0; } #endif /* Use extern inlines or force inlines. */ __END_DECLS #endif /* bits/spin-lock.h */