Implement Atomics API

src/runtime/runtime.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_RUNTIME_RUNTIME_H_
 #define V8_RUNTIME_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/objects.h"
 #include "src/zone.h"
@@ skipping 35 matching lines @@
   F(GrowArrayElements, 2, 1)                \
   F(HasComplexElements, 1, 1)               \
   F(IsArray, 1, 1)                          \
   F(HasCachedArrayIndex, 1, 1)              \
   F(GetCachedArrayIndex, 1, 1)              \
   F(FixedArrayGet, 2, 1)                    \
   F(FixedArraySet, 3, 1)                    \
   F(FastOneByteArrayJoin, 2, 1)
 
 
+#define FOR_EACH_INTRINSIC_ATOMICS(F) \
+  F(AtomicsCompareExchange, 4, 1)     \
+  F(AtomicsLoad, 2, 1)                \
+  F(AtomicsStore, 3, 1)               \
+  F(AtomicsAdd, 3, 1)                 \
+  F(AtomicsSub, 3, 1)                 \
+  F(AtomicsAnd, 3, 1)                 \
+  F(AtomicsOr, 3, 1)                  \
+  F(AtomicsXor, 3, 1)                 \
+  F(AtomicsExchange, 3, 1)            \
+  F(AtomicsIsLockFree, 1, 1)
+
+
 #define FOR_EACH_INTRINSIC_CLASSES(F)         \
   F(ThrowNonMethodError, 0, 1)                \
   F(ThrowUnsupportedSuperError, 0, 1)         \
   F(ThrowConstructorNonCallableError, 0, 1)   \
   F(ThrowArrayNotSubclassableError, 0, 1)     \
   F(ThrowStaticPrototypeError, 0, 1)          \
   F(ThrowIfStaticPrototype, 1, 1)             \
   F(ToMethod, 2, 1)                           \
   F(HomeObjectSymbol, 0, 1)                   \
   F(DefineClass, 6, 1)                        \
@@ skipping 581 matching lines @@
   F(TypedArrayInitialize, 5, 1)              \
   F(TypedArrayInitializeFromArrayLike, 4, 1) \
   F(ArrayBufferViewGetByteLength, 1, 1)      \
   F(ArrayBufferViewGetByteOffset, 1, 1)      \
   F(TypedArrayGetLength, 1, 1)               \
   F(DataViewGetBuffer, 1, 1)                 \
   F(TypedArrayGetBuffer, 1, 1)               \
   F(TypedArraySetFastCases, 3, 1)            \
   F(TypedArrayMaxSizeInHeap, 0, 1)           \
   F(IsTypedArray, 1, 1)                      \
+  F(IsSharedTypedArray, 1, 1)                \
+  F(IsSharedIntegerTypedArray, 1, 1)         \
   F(DataViewInitialize, 4, 1)                \
   F(DataViewGetUint8, 3, 1)                  \
   F(DataViewGetInt8, 3, 1)                   \
   F(DataViewGetUint16, 3, 1)                 \
   F(DataViewGetInt16, 3, 1)                  \
   F(DataViewGetUint32, 3, 1)                 \
   F(DataViewGetInt32, 3, 1)                  \
   F(DataViewGetFloat32, 3, 1)                \
   F(DataViewGetFloat64, 3, 1)                \
   F(DataViewSetUint8, 4, 1)                  \
@@ skipping 12 matching lines @@
 
 
 #define FOR_EACH_INTRINSIC_RETURN_PAIR(F) \
   F(LoadLookupSlot, 2, 2)                 \
   F(LoadLookupSlotNoReferenceError, 2, 2) \
   F(ResolvePossiblyDirectEval, 6, 2)
 
 
 #define FOR_EACH_INTRINSIC_RETURN_OBJECT(F) \
   FOR_EACH_INTRINSIC_ARRAY(F)               \
+  FOR_EACH_INTRINSIC_ATOMICS(F)             \
   FOR_EACH_INTRINSIC_CLASSES(F)             \
   FOR_EACH_INTRINSIC_COLLECTIONS(F)         \
   FOR_EACH_INTRINSIC_COMPILER(F)            \
   FOR_EACH_INTRINSIC_DATE(F)                \
   FOR_EACH_INTRINSIC_DEBUG(F)               \
   FOR_EACH_INTRINSIC_FORIN(F)               \
   FOR_EACH_INTRINSIC_FUNCTION(F)            \
   FOR_EACH_INTRINSIC_GENERATOR(F)           \
   FOR_EACH_INTRINSIC_I18N(F)                \
   FOR_EACH_INTRINSIC_INTERNAL(F)            \
@@ skipping 167 matching lines @@
   static void WeakCollectionSet(Handle<JSWeakCollection> weak_collection,
                                 Handle<Object> key, Handle<Object> value,
                                 int32_t hash);
   static bool WeakCollectionDelete(Handle<JSWeakCollection> weak_collection,
                                    Handle<Object> key);
   static bool WeakCollectionDelete(Handle<JSWeakCollection> weak_collection,
                                    Handle<Object> key, int32_t hash);
 
   static MaybeHandle<JSArray> GetInternalProperties(Isolate* isolate,
                                                     Handle<Object>);
+
+  static bool AtomicIsLockFree(uint32_t size);
 };
 
 
 std::ostream& operator<<(std::ostream&, Runtime::FunctionId);
 
 //---------------------------------------------------------------------------
 // Constants used by interface to runtime functions.
 
 class AllocateDoubleAlignFlag : public BitField<bool, 0, 1> {};
 class AllocateTargetSpace : public BitField<AllocationSpace, 1, 3> {};
 
 class DeclareGlobalsEvalFlag : public BitField<bool, 0, 1> {};
 class DeclareGlobalsNativeFlag : public BitField<bool, 1, 1> {};
 STATIC_ASSERT(LANGUAGE_END == 3);
 class DeclareGlobalsLanguageMode : public BitField<LanguageMode, 2, 2> {};
 
+//---------------------------------------------------------------------------
+// Inline functions
+
+// Assume that 32-bit architectures don't have 64-bit atomic ops.
+// TODO(binji): can we do better here?
+#if V8_TARGET_ARCH_64_BIT && V8_HOST_ARCH_64_BIT
+
+#define ATOMICS_REQUIRE_LOCK_64_BIT 0
+
+inline bool Runtime::AtomicIsLockFree(uint32_t size) {
+  return size == 1 || size == 2 || size == 4 || size == 8;
+}
+
+#else
+
+#define ATOMICS_REQUIRE_LOCK_64_BIT 1
+
+inline bool Runtime::AtomicIsLockFree(uint32_t size) {
+  return size == 1 || size == 2 || size == 4;
+}
+
+#endif
+
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_RUNTIME_RUNTIME_H_