text: // Copyright 2016 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.
  
  #ifndef V8_INSPECTOR_V8_HEAP_PROFILER_AGENT_IMPL_H_
  #define V8_INSPECTOR_V8_HEAP_PROFILER_AGENT_IMPL_H_
  
  #include <memory>
  
  #include "src/base/macros.h"
  #include "src/inspector/protocol/Forward.h"
  #include "src/inspector/protocol/HeapProfiler.h"
  
  namespace v8 {
  class Isolate;
  }
  
  namespace v8_inspector {
  
  class V8InspectorSessionImpl;
  
  using protocol::Maybe;
  using protocol::Response;
  
  class V8HeapProfilerAgentImpl : public protocol::HeapProfiler::Backend {
   public:
    V8HeapProfilerAgentImpl(V8InspectorSessionImpl*, protocol::FrontendChannel*,
                            protocol::DictionaryValue* state);
    ~V8HeapProfilerAgentImpl() override;
    V8HeapProfilerAgentImpl(const V8HeapProfilerAgentImpl&) = delete;
    V8HeapProfilerAgentImpl& operator=(const V8HeapProfilerAgentImpl&) = delete;
    void restore();
  
    void collectGarbage(
        std::unique_ptr<CollectGarbageCallback> callback) override;
  
    Response enable() override;
    Response startTrackingHeapObjects(Maybe<bool> trackAllocations) override;
    Response stopTrackingHeapObjects(Maybe<bool> reportProgress,
                                     Maybe<bool> treatGlobalObjectsAsRoots,
                                     Maybe<bool> captureNumericValue) override;
  
    Response disable() override;
  
    Response takeHeapSnapshot(Maybe<bool> reportProgress,
                              Maybe<bool> treatGlobalObjectsAsRoots,
                              Maybe<bool> captureNumericValue) override;
  
    Response getObjectByHeapObjectId(
        const String16& heapSnapshotObjectId, Maybe<String16> objectGroup,
        std::unique_ptr<protocol::Runtime::RemoteObject>* result) override;
    Response addInspectedHeapObject(
        const String16& inspectedHeapObjectId) override;
    Response getHeapObjectId(const String16& objectId,
                             String16* heapSnapshotObjectId) override;
  
    Response startSampling(Maybe<double> samplingInterval) override;
    Response stopSampling(
        std::unique_ptr<protocol::HeapProfiler::SamplingHeapProfile>*) override;
    Response getSamplingProfile(
        std::unique_ptr<protocol::HeapProfiler::SamplingHeapProfile>*) override;
  
   private:
    struct AsyncGC;
    class GCTask;
  
    void startTrackingHeapObjectsInternal(bool trackAllocations);
    void stopTrackingHeapObjectsInternal();
    void requestHeapStatsUpdate();
    static void onTimer(void*);
  
    V8InspectorSessionImpl* m_session;
    v8::Isolate* m_isolate;
    protocol::HeapProfiler::Frontend m_frontend;
    protocol::DictionaryValue* m_state;
    bool m_hasTimer;
    std::shared_ptr<AsyncGC> m_async_gc;
  };
  
  }  // namespace v8_inspector
  
  #endif  // V8_INSPECTOR_V8_HEAP_PROFILER_AGENT_IMPL_H_
  