diff options
Diffstat (limited to 'erts/include/internal/ppc32/rwlock.h')
| -rw-r--r-- | erts/include/internal/ppc32/rwlock.h | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/erts/include/internal/ppc32/rwlock.h b/erts/include/internal/ppc32/rwlock.h index 19ec26ab68..311f000b69 100644 --- a/erts/include/internal/ppc32/rwlock.h +++ b/erts/include/internal/ppc32/rwlock.h @@ -1,7 +1,7 @@ /* * %CopyrightBegin% * - * Copyright Ericsson AB 2005-2010. All Rights Reserved. + * Copyright Ericsson AB 2005-2011. All Rights Reserved. * * The contents of this file are subject to the Erlang Public License, * Version 1.1, (the "License"); you may not use this file except in @@ -23,12 +23,14 @@ * * Based on the examples in Appendix E of Motorola's * "Programming Environments Manual For 32-Bit Implementations - * of the PowerPC Architecture". Uses eieio instead of sync - * in the unlock sequence, as suggested in the manual. + * of the PowerPC Architecture". */ #ifndef ETHREAD_PPC_RWLOCK_H #define ETHREAD_PPC_RWLOCK_H +#define ETHR_HAVE_NATIVE_RWSPINLOCKS 1 +#define ETHR_NATIVE_RWSPINLOCK_IMPL "ethread" + /* Unlocked if zero, read-locked if negative, write-locked if +1. */ typedef struct { volatile int lock; @@ -47,9 +49,10 @@ ethr_native_read_unlock(ethr_native_rwlock_t *lock) { int tmp; - /* this is eieio + ethr_native_atomic_inc() - isync */ + ETHR_MEMBAR(ETHR_LoadStore|ETHR_StoreStore); + + /* this is ethr_native_atomic_inc() - isync */ __asm__ __volatile__( - "eieio\n\t" "1:\t" "lwarx %0,0,%1\n\t" "addic %0,%0,1\n\t" @@ -105,7 +108,7 @@ ethr_native_read_lock(ethr_native_rwlock_t *lock) static ETHR_INLINE void ethr_native_write_unlock(ethr_native_rwlock_t *lock) { - __asm__ __volatile__("eieio" : : : "memory"); + ETHR_MEMBAR(ETHR_LoadStore|ETHR_StoreStore); lock->lock = 0; } |