diff options
Diffstat (limited to 'erts/include/internal/ethread.h')
| -rw-r--r-- | erts/include/internal/ethread.h | 66 |
1 files changed, 43 insertions, 23 deletions
diff --git a/erts/include/internal/ethread.h b/erts/include/internal/ethread.h index 934a79c6f9..4e7a38cd5c 100644 --- a/erts/include/internal/ethread.h +++ b/erts/include/internal/ethread.h @@ -1,19 +1,19 @@ /* * %CopyrightBegin% - * - * Copyright Ericsson AB 2004-2009. All Rights Reserved. - * + * + * Copyright Ericsson AB 2004-2010. 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 * compliance with the License. You should have received a copy of the * Erlang Public License along with this software. If not, it can be * retrieved online at http://www.erlang.org/. - * + * * Software distributed under the License is distributed on an "AS IS" * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See * the License for the specific language governing rights and limitations * under the License. - * + * * %CopyrightEnd% */ @@ -375,6 +375,12 @@ ETHR_INLINE_FUNC_NAME_(ethr_mutex_unlock)(ethr_mutex *mtx) #define ETHR_HAVE_OPTIMIZED_ATOMIC_OPS 1 #define ETHR_HAVE_OPTIMIZED_LOCKS 1 +#define ETHR_MEMORY_BARRIER \ +do { \ + volatile LONG x___ = 0; \ + (void) _InterlockedCompareExchange(&x___, (LONG) 1, (LONG) 0); \ +} while (0) + typedef struct { volatile LONG value; } ethr_atomic_t; @@ -688,25 +694,33 @@ ETHR_INLINE_FUNC_NAME_(ethr_write_lock)(ethr_rwlock_t *lock) #endif /* For CPU-optimised atomics, spinlocks, and rwlocks. */ -#if !defined(ETHR_DISABLE_NATIVE_IMPLS) && defined(__GNUC__) -# if ETHR_SIZEOF_PTR == 4 -# if defined(__i386__) -# include "i386/ethread.h" -# elif (defined(__powerpc__) || defined(__ppc__)) && !defined(__powerpc64__) -# include "ppc32/ethread.h" -# elif defined(__sparc__) -# include "sparc32/ethread.h" -# elif defined(__tile__) -# include "tile/ethread.h" +#if !defined(ETHR_DISABLE_NATIVE_IMPLS) +# if defined(__GNUC__) +# if defined(ETHR_PREFER_GCC_NATIVE_IMPLS) +# include "gcc/ethread.h" # endif -# elif ETHR_SIZEOF_PTR == 8 -# if defined(__x86_64__) -# include "x86_64/ethread.h" -# elif defined(__sparc__) && defined(__arch64__) -# include "sparc64/ethread.h" +# ifndef ETHR_HAVE_NATIVE_ATOMICS +# if ETHR_SIZEOF_PTR == 4 +# if defined(__i386__) +# include "i386/ethread.h" +# elif (defined(__powerpc__)||defined(__ppc__))&&!defined(__powerpc64__) +# include "ppc32/ethread.h" +# elif defined(__sparc__) +# include "sparc32/ethread.h" +# elif defined(__tile__) +# include "tile/ethread.h" +# endif +# elif ETHR_SIZEOF_PTR == 8 +# if defined(__x86_64__) +# include "x86_64/ethread.h" +# elif defined(__sparc__) && defined(__arch64__) +# include "sparc64/ethread.h" +# endif +# endif +# include "gcc/ethread.h" # endif # endif -#endif /* !defined(ETHR_DISABLE_NATIVE_IMPLS) && defined(__GNUC__) */ +#endif /* !defined(ETHR_DISABLE_NATIVE_IMPLS) */ #ifdef ETHR_HAVE_OPTIMIZED_ATOMIC_OPS # undef ETHR_HAVE_NATIVE_ATOMICS @@ -1124,8 +1138,14 @@ ETHR_INLINE_FUNC_NAME_(ethr_write_lock)(ethr_rwlock_t *lock) */ #ifndef ETHR_HAVE_OPTIMIZED_ATOMIC_OPS -#define ETHR_ATOMIC_ADDR_BITS 4 -#define ETHR_ATOMIC_ADDR_SHIFT 3 +/* + * ETHR_MEMORY_BARRIER orders between locked and atomic accesses only, + * i.e. when this atomic fallback is used a noop is sufficient. + */ +#define ETHR_MEMORY_BARRIER + +#define ETHR_ATOMIC_ADDR_BITS 10 +#define ETHR_ATOMIC_ADDR_SHIFT 6 typedef struct { union { |