1 files changed, 244 insertions, 0 deletions
diff --git a/erts/include/internal/win/ethr_atomic.h b/erts/include/internal/win/ethr_atomic.h
new file mode 100644
index 0000000000..500459dd6c
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+++ b/erts/include/internal/win/ethr_atomic.h
@@ -0,0 +1,244 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 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%
+ */
+
+/*
+ * Description: Native atomics ethread support when using VC++
+ * Author: Rickard Green
+ */
+
+#ifndef ETHR_WIN_ATOMIC_H__
+#define ETHR_WIN_ATOMIC_H__
+
+#ifdef _MSC_VER
+#  if _MSC_VER < 1300
+#    define ETHR_IMMED_ATOMIC_SET_GET_SAFE__ 0 /* Dont trust really old compilers */
+#  else
+#    if defined(_M_IX86)
+#      define ETHR_IMMED_ATOMIC_SET_GET_SAFE__ 1
+#    else /* I.e. IA64 */
+#      if _MSC_VER >= 1400
+#        define ETHR_IMMED_ATOMIC_SET_GET_SAFE__ 1
+#      else
+#        define ETHR_IMMED_ATOMIC_SET_GET_SAFE__ 0
+#      endif
+#    endif
+#  endif
+#  if _MSC_VER >= 1400
+#    include <intrin.h>
+#    undef ETHR_COMPILER_BARRIER
+#    define ETHR_COMPILER_BARRIER _ReadWriteBarrier()
+#  endif
+#pragma intrinsic(_ReadWriteBarrier)
+#pragma intrinsic(_InterlockedAnd)
+#pragma intrinsic(_InterlockedOr)
+#else
+#    define ETHR_IMMED_ATOMIC_SET_GET_SAFE__ 0
+#endif
+
+/*
+ * No configure test checking for _Interlocked*_{acq,rel} and
+ * Interlocked*{Acquire,Release} have been written yet...
+ *
+ * Note, that these are pure optimizations for the itanium
+ * processor.
+ */
+
+#ifdef ETHR_HAVE_INTERLOCKEDCOMPAREEXCHANGE_ACQ
+#pragma intrinsic(_InterlockedCompareExchange_acq)
+#endif
+#ifdef ETHR_HAVE_INTERLOCKEDCOMPAREEXCHANGE_REL
+#pragma intrinsic(_InterlockedCompareExchange_rel)
+#endif
+
+
+typedef struct {
+    volatile LONG value;
+} ethr_native_atomic_t;
+
+#define ETHR_MEMORY_BARRIER \
+do { \
+    volatile LONG x___ = 0; \
+    _InterlockedCompareExchange(&x___, (LONG) 1, (LONG) 0); \
+} while (0)
+
+#if defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_AUX_IMPL__)
+
+static ETHR_INLINE void
+ethr_native_atomic_init(ethr_native_atomic_t *var, long i)
+{
+    var->value = (LONG) i;
+}
+
+static ETHR_INLINE void
+ethr_native_atomic_set(ethr_native_atomic_t *var, long i)
+{
+#if ETHR_IMMED_ATOMIC_SET_GET_SAFE__
+    var->value = (LONG) i;
+#else
+    (void) InterlockedExchange(&var->value, (LONG) i);
+#endif
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_read(ethr_native_atomic_t *var)
+{
+#if ETHR_IMMED_ATOMIC_SET_GET_SAFE__
+    return var->value;
+#else
+    return InterlockedExchangeAdd(&var->value, (LONG) 0);
+#endif
+}
+
+static ETHR_INLINE void
+ethr_native_atomic_add(ethr_native_atomic_t *var, long incr)
+{
+    (void) InterlockedExchangeAdd(&var->value, (LONG) incr);
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_add_return(ethr_native_atomic_t *var, long i)
+{
+    LONG tmp = InterlockedExchangeAdd(&var->value, (LONG) i);
+    return tmp + i;
+}
+
+static ETHR_INLINE void
+ethr_native_atomic_inc(ethr_native_atomic_t *var)
+{
+    (void) InterlockedIncrement(&var->value);
+}
+
+static ETHR_INLINE void
+ethr_native_atomic_dec(ethr_native_atomic_t *var)
+{
+    (void) InterlockedDecrement(&var->value);
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_inc_return(ethr_native_atomic_t *var)
+{
+    return (long) InterlockedIncrement(&var->value);
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_dec_return(ethr_native_atomic_t *var)
+{
+    return (long) InterlockedDecrement(&var->value);
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_and_retold(ethr_native_atomic_t *var, long mask)
+{
+    return (long) _InterlockedAnd(&var->value, mask);
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_or_retold(ethr_native_atomic_t *var, long mask)
+{
+    return (long) _InterlockedOr(&var->value, mask);
+}
+
+
+static ETHR_INLINE long
+ethr_native_atomic_cmpxchg(ethr_native_atomic_t *var, long new, long old)
+{
+    return (long) _InterlockedCompareExchange(&var->value, (LONG) new, (LONG) old);
+}
+
+
+static ETHR_INLINE long
+ethr_native_atomic_xchg(ethr_native_atomic_t *var, long new)
+{
+    return (long) InterlockedExchange(&var->value, (LONG) new);
+}
+
+/*
+ * Atomic ops with at least specified barriers.
+ */
+
+static ETHR_INLINE long
+ethr_native_atomic_read_acqb(ethr_native_atomic_t *var)
+{
+#ifdef ETHR_HAVE_INTERLOCKEDEXCHANGEADDACQUIRE
+    return (long) InterlockedExchangeAddAcquire(&var->value, (LONG) 0);
+#else
+    return (long) InterlockedExchangeAdd(&var->value, (LONG) 0);
+#endif
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_inc_return_acqb(ethr_native_atomic_t *var)
+{
+#ifdef ETHR_HAVE_INTERLOCKEDINCREMENTACQUIRE
+    return (long) InterlockedIncrementAcquire(&var->value);
+#else
+    return (long) InterlockedIncrement(&var->value);
+#endif
+}
+
+static ETHR_INLINE void
+ethr_native_atomic_set_relb(ethr_native_atomic_t *var, long i)
+{
+    (void) InterlockedExchange(&var->value, (LONG) i);
+}
+
+static ETHR_INLINE void
+ethr_native_atomic_dec_relb(ethr_native_atomic_t *var)
+{
+#ifdef ETHR_HAVE_INTERLOCKEDDECREMENTRELEASE
+    (void) InterlockedDecrementRelease(&var->value);
+#else
+    (void) InterlockedDecrement(&var->value);
+#endif
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_dec_return_relb(ethr_native_atomic_t *var)
+{
+#ifdef ETHR_HAVE_INTERLOCKEDDECREMENTRELEASE
+    return (long) InterlockedDecrementRelease(&var->value);
+#else
+    return (long) InterlockedDecrement(&var->value);
+#endif
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_cmpxchg_acqb(ethr_native_atomic_t *var, long new, long old)
+{
+#ifdef ETHR_HAVE_INTERLOCKEDCOMPAREEXCHANGE_ACQ
+    return (long) _InterlockedCompareExchange_acq(&var->value, (LONG) new, (LONG) old);
+#else
+    return (long) _InterlockedCompareExchange(&var->value, (LONG) new, (LONG) old);
+#endif
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_cmpxchg_relb(ethr_native_atomic_t *var, long new, long old)
+{
+
+#ifdef ETHR_HAVE_INTERLOCKEDCOMPAREEXCHANGE_REL
+    return (long) _InterlockedCompareExchange_rel(&var->value, (LONG) new, (LONG) old);
+#else
+    return (long) _InterlockedCompareExchange(&var->value, (LONG) new, (LONG) old);
+#endif
+}
+
+#endif
+
+#endif