unique_handle_gles.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_IMPELLER_RENDERER_BACKEND_GLES_UNIQUE_HANDLE_GLES_H_
#define FLUTTER_IMPELLER_RENDERER_BACKEND_GLES_UNIQUE_HANDLE_GLES_H_
 
#include "impeller/renderer/backend/gles/handle_gles.h"
#include "impeller/renderer/backend/gles/reactor_gles.h"
 
namespace impeller {
 
//------------------------------------------------------------------------------
/// @brief      A unique handle to an OpenGL object. The collection of this
///             handle scheduled the destruction of the associated OpenGL object
///             in the reactor.
///
class UniqueHandleGLES {
 public:
  UniqueHandleGLES() = default;
 
  UniqueHandleGLES(std::shared_ptr<ReactorGLES> reactor, HandleType type);
 
  static UniqueHandleGLES MakeUntracked(std::shared_ptr<ReactorGLES> reactor,
                                        HandleType type);
 
  UniqueHandleGLES(std::shared_ptr<ReactorGLES> reactor, HandleGLES handle);
 
  ~UniqueHandleGLES();
 
  UniqueHandleGLES(UniqueHandleGLES&&);
  UniqueHandleGLES& operator=(UniqueHandleGLES&&);
 
  UniqueHandleGLES(const UniqueHandleGLES&) = delete;
  UniqueHandleGLES& operator=(const UniqueHandleGLES&) = delete;
 
  const HandleGLES& Get() const;
 
  bool IsValid() const;
 
  /// Collect the managed handle and replace it with a dead handle.
  void Reset();
 
  /// Release ownership of the handle.
  HandleGLES Release();
 
 private:
  std::shared_ptr<ReactorGLES> reactor_ = nullptr;
  HandleGLES handle_ = HandleGLES::DeadHandle();
 
  void CollectHandle();
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_RENDERER_BACKEND_GLES_UNIQUE_HANDLE_GLES_H_