introduce eternal handles

src/global-handles.h

 // Copyright 2011 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 10 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef V8_GLOBAL_HANDLES_H_
 #define V8_GLOBAL_HANDLES_H_
 
+#include <vector>
+
 #include "../include/v8.h"
 #include "../include/v8-profiler.h"
 
 #include "list.h"
 #include "v8utils.h"
 
 namespace v8 {
 namespace internal {
 
 class GCTracer;
@@ skipping 283 matching lines @@
   List<ObjectGroupConnection> object_group_connections_;
   List<ObjectGroupRetainerInfo> retainer_infos_;
   List<ObjectGroupConnection> implicit_ref_connections_;
 
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(GlobalHandles);
 };
 
 
+class EternalHandles {
+ public:
+  static const int kInvalidIndex = -1;
+  enum IndexedHandle {
+    I18N_TEMPLATE_ONE,
+    I18N_TEMPLATE_TWO,
+
+    LAST_INDEX = I18N_TEMPLATE_TWO
+  };
+
+  EternalHandles();
+  ~EternalHandles();
+
+  int NumberOfHandles() { return size_; }
+
+  int Create(Isolate* isolate, Object* object);
+
+  inline Object** Get(int index) {
+    ASSERT(index >= 0 && index < size_);
+    return &blocks_[index >> kShift][index & kMask];
+  }
+
+  inline int GetIndex(IndexedHandle i) {
+    return indexed_handles_[i];
+  }
+
+  int CreateIndexed(Isolate* isolate, Object* object, IndexedHandle i) {
+    ASSERT(GetIndex(i) == kInvalidIndex);
+    indexed_handles_[i] = Create(isolate, object);
+    return indexed_handles_[i];
+  }
+
+  void IterateAllRoots(ObjectVisitor* visitor);
+
+ private:
+  static const int kShift = 8;
+  static const int kSize = 1 << kShift;
+  static const int kMask = 0xff;
+  typedef std::vector<Object**> BlockStore;
+  int size_;
+  Object*** blocks_;
+  BlockStore block_store_;
+  int indexed_handles_[LAST_INDEX+1];
+
+  DISALLOW_COPY_AND_ASSIGN(EternalHandles);
+};
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_GLOBAL_HANDLES_H_