First version of PerformanceObserver

Source/core/timing/PerformanceBase.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel 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.
@@ skipping 14 matching lines @@
  * 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 PerformanceBase_h
 #define PerformanceBase_h
 
+#include "bindings/core/v8/V8PerformanceObserverCallback.h"
 #include "core/CoreExport.h"
 #include "core/events/EventTarget.h"
 #include "core/timing/PerformanceEntry.h"
 #include "platform/heap/Handle.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class Document;
 class ExceptionState;
+class PerformanceObserver;
+class PerformanceObserverRegistration;
 class PerformanceTiming;
 class ResourceTimingInfo;
 class UserTiming;
 
 using PerformanceEntryVector = HeapVector<Member<PerformanceEntry>>;
+using PerformanceObserverRegistrationVector = HeapVector<Member<PerformanceObserverRegistration>>;
+using FilterTypeIndex = size_t;
+using PerformanceObserverRegistrations = HeapHashMap<FilterTypeIndex, PerformanceObserverRegistrationVector>;
 
 class CORE_EXPORT PerformanceBase : public RefCountedGarbageCollectedEventTargetWithInlineData<PerformanceBase> {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(PerformanceBase);
 public:
     ~PerformanceBase() override;
 
     const AtomicString& interfaceName() const override;
 
     virtual PerformanceTiming* timing() const;
     double now() const;
@@ skipping 19 matching lines @@
     void addRenderTiming(Document*, unsigned, double, double);
 
     void addCompositeTiming(Document*, unsigned, double);
 
     void mark(const String& markName, ExceptionState&);
     void clearMarks(const String& markName);
 
     void measure(const String& measureName, const String& startMark, const String& endMark, ExceptionState&);
     void clearMeasures(const String& measureName);
 
+    PerformanceObserver* createPerformanceObserver(PerformanceObserverCallback*);
+    void unregisterPerformanceObserver(PerformanceObserverRegistration*);
+    void registerPerformanceObserver(PerformanceObserverRegistration*);
+
     DECLARE_VIRTUAL_TRACE();
 
 protected:
+    enum FilterType {
+        Composite = 1,

[esprehn, 2015/07/18 22:24:16]

UnknownFilter, or maybe InvalidFilter
CompositeFilter,
...

[MikeB, 2015/07/20 23:06:50]

Done.

+        Mark,
+        Measure,
+        Render,
+        Resource,
+    };
+
     explicit PerformanceBase(double timeOrigin);
     bool isResourceTimingBufferFull();
     void addResourceTimingBuffer(PerformanceEntry*);
 
     bool isFrameTimingBufferFull();
     void addFrameTimingBuffer(PerformanceEntry*);
 
+    void notifyObserversOfEntry(FilterType, PerformanceEntry*);
+    bool hasObserverFor(FilterType);
+
     PerformanceEntryVector m_frameTimingBuffer;
     unsigned m_frameTimingBufferSize;
     PerformanceEntryVector m_resourceTimingBuffer;
     unsigned m_resourceTimingBufferSize;
     double m_timeOrigin;
 
     Member<UserTiming> m_userTiming;
+
+    PerformanceObserverRegistrations m_observerRegistry;
 };
 
 } // namespace blink
 
 #endif // PerformanceBase_h