Support Promises instrumentation on backend.

Source/core/inspector/PromiseOfficer.h

+/*
+ * Copyright (C) 2013 Google Inc. 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 with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * 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 PromiseOfficer_h
+#define PromiseOfficer_h
+
+#include <v8.h>
+#include "bindings/v8/custom/V8PromiseCustom.h"
+#include "bindings/v8/ScopedPersistent.h"
+#include "bindings/v8/V8Binding.h" // toIsolate
+#include "core/dom/ExecutionContext.h"
+#include "wtf/HashMap.h"
+#include "wtf/Noncopyable.h"
+#include "wtf/RefPtr.h"
+#include "wtf/Vector.h"
+
+namespace WebCore {
+
+class PromiseOfficer {
+    WTF_MAKE_NONCOPYABLE(PromiseOfficer);
+public:
+    // TODO: maybe move the implementation of this class to .cpp?
+    class PromiseData : public RefCounted<PromiseData> {
+    public:
+        PromiseData(v8::Handle<v8::Object> promise, v8::Handle<v8::Object> parentPromise, V8PromiseCustom::PromiseState state, ExecutionContext* context)
+            : m_isolate(toIsolate(context))
+            , m_promise(m_isolate, promise)
+            , m_parentPromise(m_isolate, parentPromise)
+            , m_state(state)
+        { }
+
+        v8::Handle<v8::Object> getPromise() {
+            return m_promise.newLocal(m_isolate);
+        }
+
+        v8::Handle<v8::Object> getParentPromise() {
+            return m_parentPromise.newLocal(m_isolate);
+        }
+
+        V8PromiseCustom::PromiseState getState() {
+            return m_state;
+        }
+
+    private:
+        v8::Isolate* m_isolate;
+        ScopedPersistent<v8::Object> m_promise;
+        ScopedPersistent<v8::Object> m_parentPromise;
+        V8PromiseCustom::PromiseState m_state;
+        // TODO: add m_value and maybe m_scriptLocation.
+    };
+
+    PromiseOfficer();
+
+    void addPromise(ExecutionContext* context, v8::Handle<v8::Object> promise, v8::Handle<v8::Object> parentPromise, V8PromiseCustom::PromiseState state);
+    void updatePromise(ExecutionContext* context, v8::Handle<v8::Object> promise, v8::Handle<v8::Object> newParentPromise, V8PromiseCustom::PromiseState newState);
+    void updatePromiseParent(ExecutionContext* context, v8::Handle<v8::Object> promise, v8::Handle<v8::Object> newParentPromise);
+    void updatePromiseState(ExecutionContext* context, v8::Handle<v8::Object> promise, V8PromiseCustom::PromiseState newState);
+
+private:
+    typedef Vector<RefPtr<PromiseData> > PromiseDataVector;
+    typedef HashMap<int, PromiseDataVector> PromiseDataMap;
+    PromiseDataMap m_promiseDataMap;
+};
+
+} // namespace WebCore
+
+#endif // !defined(PromiseOfficer_h)