callback_cache.h

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// Copyright 2013 The Flutter 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 FLUTTER_LIB_UI_PLUGINS_CALLBACK_CACHE_H_
#define FLUTTER_LIB_UI_PLUGINS_CALLBACK_CACHE_H_
 
#include <map>
#include <memory>
#include <mutex>
#include <string>
 
#include "flutter/fml/macros.h"
#include "third_party/dart/runtime/include/dart_api.h"
 
namespace flutter {
 
struct DartCallbackRepresentation {
  std::string name;
  std::string class_name;
  std::string library_path;
};
 
class DartCallbackCache {
 public:
  static void SetCachePath(const std::string& path);
  static std::string GetCachePath() { return cache_path_; }
 
  static int64_t GetCallbackHandle(const std::string& name,
                                   const std::string& class_name,
                                   const std::string& library_path);
 
  static Dart_Handle GetCallback(int64_t handle);
 
  static std::unique_ptr<DartCallbackRepresentation> GetCallbackInformation(
      int64_t handle);
 
  static void LoadCacheFromDisk();
 
 private:
  static Dart_Handle LookupDartClosure(const std::string& name,
                                       const std::string& class_name,
                                       const std::string& library_path);
 
  static void SaveCacheToDisk();
 
  static std::mutex mutex_;
  static std::string cache_path_;
 
  static std::map<int64_t, DartCallbackRepresentation> cache_;
 
  FML_DISALLOW_IMPLICIT_CONSTRUCTORS(DartCallbackCache);
};
 
}  // namespace flutter
 
#endif  // FLUTTER_LIB_UI_PLUGINS_CALLBACK_CACHE_H_