api: Object::CachedProperty

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 132 matching lines @@
 //         - CodeCache
 //
 // Formats of Object*:
 //  Smi:        [31 bit signed int] 0
 //  HeapObject: [32 bit direct pointer] (4 byte aligned) | 01
 //  Failure:    [30 bit signed int] 11
 
 namespace v8 {
 namespace internal {
 
+// Forward declarations
+class LookupCacheEntry;
+
 enum CompareMapMode {
   REQUIRE_EXACT_MAP,
   ALLOW_ELEMENT_TRANSITION_MAPS
 };
 
 enum KeyedAccessStoreMode {
   STANDARD_STORE,
   STORE_TRANSITION_SMI_TO_OBJECT,
   STORE_TRANSITION_SMI_TO_DOUBLE,
   STORE_TRANSITION_DOUBLE_TO_OBJECT,
@@ skipping 9357 matching lines @@
   static inline int set(int value, int bit_position, bool v) {
     if (v) {
       value |= (1 << bit_position);
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
+
+class LookupCache {
+ public:
+  explicit LookupCache(Isolate* isolate);
+  ~LookupCache();
+
+  void Lookup(Handle<Object> obj,
+              Handle<Name> name,
+              LookupResult* result,
+              bool set_property = false);
+  MUST_USE_RESULT MaybeObject* GetProperty(Handle<Object> obj,
+                                           Handle<Name> name);
+  MUST_USE_RESULT MaybeObject* SetProperty(Handle<Object> obj,
+                                           Handle<Name> name,
+                                           Handle<Object> value);
+
+ private:
+  static const int kCacheEntryCount = 7;
+
+  Isolate* isolate_;
+  int count_;
+  LookupCacheEntry* entries_[kCacheEntryCount];
+  int hidden_count_;
+  LookupCacheEntry* hidden_entries_[kCacheEntryCount];
+};
+
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_