Add WeakKeyMap to v8.h

src/api.cc

 // 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.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 2231 matching lines @@
 }
 
 bool StackFrame::IsEval() const { return getBoolProperty(this, "isEval"); }
 
 
 bool StackFrame::IsConstructor() const {
   return getBoolProperty(this, "isConstructor");
 }
 
 
+// --- N a t i v e W e a k M a p ---
+
+NativeWeakMap* NativeWeakMap::New(Isolate* v8_isolate) {
+  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
+  ENTER_V8(isolate);
+  i::HandleScope scope(isolate);
+  i::Handle<i::JSWeakMap> weakmap = isolate->factory()->NewJSWeakMap();
+  i::Runtime::WeakCollectionInitialize(isolate, weakmap);
+  Local<Object> v8_obj = Utils::ToLocal(i::Handle<i::JSObject>::cast(weakmap));
+  return new NativeWeakMap(v8_isolate, v8_obj);
+}
+
+
+NativeWeakMap::NativeWeakMap(Isolate* isolate, Handle<Object> weak_map)
+    : isolate_(isolate), map_(isolate, weak_map) {}
+
+
+NativeWeakMap::~NativeWeakMap() {}
+
+
+void NativeWeakMap::Set(Handle<Value> v8_key, Handle<Value> v8_value) {
+  v8::HandleScope handleScope(isolate_);
+  Local<Object> map_handle = Local<Object>::New(isolate_, map_);
+  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(isolate_);
+  ENTER_V8(isolate);
+  i::Handle<i::Object> key = Utils::OpenHandle(*v8_key);
+  i::Handle<i::Object> value = Utils::OpenHandle(*v8_value);
+  i::Handle<i::JSWeakMap> weak_collection =
+      i::Handle<i::JSWeakMap>::cast(Utils::OpenHandle(*map_handle));
+  if (!key->IsJSReceiver() && !key->IsSymbol()) {
+    DCHECK(false);
+    return;
+  }
+  i::Handle<i::ObjectHashTable> table(
+      i::ObjectHashTable::cast(weak_collection->table()));
+  if (!table->IsKey(*key)) {
+    DCHECK(false);
+    return;
+  }
+  i::Runtime::WeakCollectionSet(weak_collection, key, value);
+}
+
+
+Local<Value> NativeWeakMap::Get(Handle<Value> v8_key) {
+  v8::EscapableHandleScope handleScope(isolate_);
+  Local<Object> map_handle = Local<Object>::New(isolate_, map_);
+  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(isolate_);
+  ENTER_V8(isolate);
+  i::Handle<i::Object> key = Utils::OpenHandle(*v8_key);
+  i::Handle<i::JSWeakMap> weak_collection =
+      i::Handle<i::JSWeakMap>::cast(Utils::OpenHandle(*map_handle));
+  if (!key->IsJSReceiver() && !key->IsSymbol()) {
+    DCHECK(false);
+    return Undefined(isolate_);
+  }
+  i::Handle<i::ObjectHashTable> table(
+      i::ObjectHashTable::cast(weak_collection->table()));
+  if (!table->IsKey(*key)) {
+    DCHECK(false);
+    return Undefined(isolate_);
+  }
+  i::Handle<i::Object> lookup(table->Lookup(key), isolate);
+  if (lookup->IsTheHole()) return Undefined(isolate_);
+  Local<Value> result = Utils::ToLocal(lookup);
+  return handleScope.Escape(result);
+}
+
+
+bool NativeWeakMap::Has(Handle<Value> v8_key) {
+  v8::HandleScope handleScope(isolate_);
+  Local<Object> map_handle = Local<Object>::New(isolate_, map_);
+  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(isolate_);
+  ENTER_V8(isolate);
+  i::Handle<i::Object> key = Utils::OpenHandle(*v8_key);
+  i::Handle<i::JSWeakMap> weak_collection =
+      i::Handle<i::JSWeakMap>::cast(Utils::OpenHandle(*map_handle));
+  if (!key->IsJSReceiver() && !key->IsSymbol()) {
+    DCHECK(false);
+    return false;
+  }
+  i::Handle<i::ObjectHashTable> table(
+      i::ObjectHashTable::cast(weak_collection->table()));
+  if (!table->IsKey(*key)) {
+    DCHECK(false);
+    return false;
+  }
+  i::Handle<i::Object> lookup(table->Lookup(key), isolate);
+  return !lookup->IsTheHole();
+}
+
+
+bool NativeWeakMap::Delete(Handle<Value> v8_key) {
+  v8::HandleScope handleScope(isolate_);
+  Local<Object> map_handle = Local<Object>::New(isolate_, map_);
+  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(isolate_);
+  ENTER_V8(isolate);
+  i::Handle<i::Object> key = Utils::OpenHandle(*v8_key);
+  i::Handle<i::JSWeakMap> weak_collection =
+      i::Handle<i::JSWeakMap>::cast(Utils::OpenHandle(*map_handle));
+  if (!key->IsJSReceiver() && !key->IsSymbol()) {
+    DCHECK(false);
+    return false;
+  }
+  i::Handle<i::ObjectHashTable> table(
+      i::ObjectHashTable::cast(weak_collection->table()));
+  if (!table->IsKey(*key)) {
+    DCHECK(false);
+    return false;
+  }
+  return i::Runtime::WeakCollectionDelete(weak_collection, key);
+}
+
+
 // --- J S O N ---
 
 Local<Value> JSON::Parse(Local<String> json_string) {
   i::Handle<i::String> string = Utils::OpenHandle(*json_string);
   i::Isolate* isolate = string->GetIsolate();
   ENTER_V8(isolate);
   i::HandleScope scope(isolate);
   i::Handle<i::String> source = i::String::Flatten(string);
   EXCEPTION_PREAMBLE(isolate);
   i::MaybeHandle<i::Object> maybe_result =
@@ skipping 5373 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal