diff options
Diffstat (limited to 'sysdeps/mach/alpha')
| -rw-r--r-- | sysdeps/mach/alpha/machine-lock.h | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/sysdeps/mach/alpha/machine-lock.h b/sysdeps/mach/alpha/machine-lock.h index 363c29e56f..80f8750c87 100644 --- a/sysdeps/mach/alpha/machine-lock.h +++ b/sysdeps/mach/alpha/machine-lock.h @@ -1,5 +1,5 @@ /* Machine-specific definition for spin locks. Alpha version. - Copyright (C) 1994,97,2002 Free Software Foundation, Inc. + Copyright (C) 1994, 1997 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 @@ -38,8 +38,8 @@ typedef __volatile long int __spin_lock_t; _EXTERN_INLINE void __spin_unlock (__spin_lock_t *__lock) { - __asm__ __volatile__ ("mb"); - *__lock = 0; + __asm__ __volatile__ ("mb; stq $31, %0; mb" + : "=m" (__lock)); } /* Try to lock LOCK; return nonzero if we locked it, zero if another has. */ @@ -47,9 +47,6 @@ __spin_unlock (__spin_lock_t *__lock) _EXTERN_INLINE int __spin_try_lock (register __spin_lock_t *__lock) { -#if 1 - return 1; -#else register long int __rtn, __tmp; do @@ -69,7 +66,6 @@ __spin_try_lock (register __spin_lock_t *__lock) } while (! __rtn); /* RTN is now nonzero; we have the lock. */ return __rtn; -#endif } /* Return nonzero if LOCK is locked. */ |