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Diffstat (limited to 'sysdeps/mach/alpha/machine-lock.h')
-rw-r--r-- | sysdeps/mach/alpha/machine-lock.h | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/sysdeps/mach/alpha/machine-lock.h b/sysdeps/mach/alpha/machine-lock.h deleted file mode 100644 index bd27d2a51f..0000000000 --- a/sysdeps/mach/alpha/machine-lock.h +++ /dev/null @@ -1,80 +0,0 @@ -/* Machine-specific definition for spin locks. Alpha version. - Copyright (C) 1994, 1997, 2007 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 _MACHINE_LOCK_H -#define _MACHINE_LOCK_H - -/* The type of a spin lock variable. */ - -typedef __volatile long int __spin_lock_t; - -/* Value to initialize `__spin_lock_t' variables to. */ - -#define __SPIN_LOCK_INITIALIZER 0L - - -#ifndef _EXTERN_INLINE -#define _EXTERN_INLINE __extern_inline -#endif - -/* Unlock LOCK. */ - -_EXTERN_INLINE void -__spin_unlock (__spin_lock_t *__lock) -{ - __asm__ __volatile__ ("mb; stq $31, %0; mb" - : "=m" (__lock)); -} - -/* Try to lock LOCK; return nonzero if we locked it, zero if another has. */ - -_EXTERN_INLINE int -__spin_try_lock (register __spin_lock_t *__lock) -{ - register long int __rtn, __tmp; - - do - { - __asm__ __volatile__ ("mb; ldq_l %0,%1" /* Load lock value into TMP. */ - : "=r" (__tmp) : "m" (*__lock)); - __rtn = 2; /* Load locked value into RTN. */ - if (__tmp) - /* The lock is already taken. */ - return 0; - - /* The lock is not taken; try to get it now. */ - __asm__ __volatile__ ("stq_c %0,%1" - : "=r" (__rtn), "=m" (*__lock) - : "0" (__rtn), "1" (*__lock)); - /* RTN is clear if stq_c was interrupted; loop to try the lock again. */ - } while (! __rtn); - /* RTN is now nonzero; we have the lock. */ - return __rtn; -} - -/* Return nonzero if LOCK is locked. */ - -_EXTERN_INLINE int -__spin_lock_locked (__spin_lock_t *__lock) -{ - return *__lock != 0; -} - - -#endif /* machine-lock.h */ |