Progress towards making Zones independent of Isolates and Threads.

src/zone.h

Index: src/zone.h
diff --git a/src/zone.h b/src/zone.h
index 864846553a234d82cfd88c3e527f1f5c7416e654..699374e18dc45509a40ba149dc4c248c22bb87c8 100644
--- a/src/zone.h
+++ b/src/zone.h
@@ -164,16 +164,16 @@ class ZoneObject {
 };
 
 
-// The ZoneListAllocationPolicy is used to specialize the GenericList
-// implementation to allocate ZoneLists and their elements in the
-// Zone.
-class ZoneListAllocationPolicy {
+// The ZoneAllocationPolicy is used to specialize generic data
+// structures to allocate themselves and their elements in the Zone.
+struct ZoneAllocationPolicy {
  public:
-  // Allocate 'size' bytes of memory in the zone.
-  static void* New(int size);
+  explicit ZoneAllocationPolicy(Zone* zone = NULL) : zone_(zone) { }
+  INLINE(void* New(size_t size));
+  INLINE(static void Delete(void *pointer)) { }
 
-  // De-allocation attempts are silently ignored.
-  static void Delete(void* p) { }
+ private:
+  Zone* zone_;
 };
 
 
@@ -182,20 +182,49 @@ class ZoneListAllocationPolicy {
 // Zone. ZoneLists cannot be deleted individually; you can delete all
 // objects in the Zone by calling Zone::DeleteAll().
 template<typename T>
-class ZoneList: public List<T, ZoneListAllocationPolicy> {
+class ZoneList: public List<T, ZoneAllocationPolicy> {
  public:
-  INLINE(void* operator new(size_t size));
-  INLINE(void* operator new(size_t size, Zone* zone));
-
   // Construct a new ZoneList with the given capacity; the length is
   // always zero. The capacity must be non-negative.
-  explicit ZoneList(int capacity)
-      : List<T, ZoneListAllocationPolicy>(capacity) { }
+  explicit ZoneList(int capacity, Zone* zone = NULL)
+      : List<T, ZoneAllocationPolicy>(capacity, ZoneAllocationPolicy(zone)) { }
+
+  INLINE(void* operator new(size_t size, Zone* zone));
+  INLINE(void* operator new(size_t size));
 
   // Construct a new ZoneList by copying the elements of the given ZoneList.
-  explicit ZoneList(const ZoneList<T>& other)
-      : List<T, ZoneListAllocationPolicy>(other.length()) {
-    AddAll(other);
+  explicit ZoneList(const ZoneList<T>& other, Zone* zone = NULL)
+      : List<T, ZoneAllocationPolicy>(other.length(),
+                                      ZoneAllocationPolicy(zone)) {
+    AddAll(other, ZoneAllocationPolicy(zone));
+  }
+
+  // We add some convenience wrappers so that we can pass in a Zone
+  // instead of a (less convenient) ZoneAllocationPolicy.
+  INLINE(void Add(const T& element, Zone* zone = NULL)) {
+    List<T, ZoneAllocationPolicy>::Add(element, ZoneAllocationPolicy(zone));
+  }
+  INLINE(void AddAll(const List<T, ZoneAllocationPolicy>& other,
+                     Zone* zone = NULL)) {
+    List<T, ZoneAllocationPolicy>::AddAll(other, ZoneAllocationPolicy(zone));
+  }
+  INLINE(void AddAll(const Vector<T>& other, Zone* zone = NULL)) {
+    List<T, ZoneAllocationPolicy>::AddAll(other, ZoneAllocationPolicy(zone));
+  }
+  INLINE(void InsertAt(int index, const T& element, Zone* zone = NULL)) {
+    List<T, ZoneAllocationPolicy>::InsertAt(index, element,
+                                            ZoneAllocationPolicy(zone));
+  }
+  INLINE(Vector<T> AddBlock(T value, int count, Zone* zone = NULL)) {
+    return List<T, ZoneAllocationPolicy>::AddBlock(value, count,
+                                                   ZoneAllocationPolicy(zone));
+  }
+  INLINE(void Allocate(int length, Zone* zone = NULL)) {
+    List<T, ZoneAllocationPolicy>::Allocate(length, ZoneAllocationPolicy(zone));
+  }
+  INLINE(void Initialize(int capacity, Zone* zone = NULL)) {
+    List<T, ZoneAllocationPolicy>::Initialize(capacity,
+                                              ZoneAllocationPolicy(zone));
   }
 
   void operator delete(void* pointer) { UNREACHABLE(); }
@@ -232,15 +261,15 @@ class ZoneScope BASE_EMBEDDED {
 // different configurations of a concrete splay tree (see splay-tree.h).
 // The tree itself and all its elements are allocated in the Zone.
 template <typename Config>
-class ZoneSplayTree: public SplayTree<Config, ZoneListAllocationPolicy> {
+class ZoneSplayTree: public SplayTree<Config, ZoneAllocationPolicy> {
  public:
   ZoneSplayTree()
-      : SplayTree<Config, ZoneListAllocationPolicy>() {}
+      : SplayTree<Config, ZoneAllocationPolicy>() {}
   ~ZoneSplayTree();
 };
 
 
-typedef TemplateHashMapImpl<ZoneListAllocationPolicy> ZoneHashMap;
+typedef TemplateHashMapImpl<ZoneAllocationPolicy> ZoneHashMap;
 
 } }  // namespace v8::internal