chromium/third_party/blink/renderer/platform/bindings/string_resource.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_STRING_RESOURCE_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_STRING_RESOURCE_H_

#include "base/dcheck_is_on.h"
#include "third_party/blink/renderer/platform/bindings/parkable_string.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
#include "v8/include/v8.h"

namespace blink {

// StringResource is a helper class for V8ExternalString. It is used
// to manage the life-cycle of the underlying buffer of the external string.
class StringResourceBase { … };

// Even though StringResource{8,16}Base are effectively empty in release mode,
// they are needed as they serve as a common ancestor to Parkable and regular
// strings.
//
// See the comment in |ToBlinkString()|'s implementation for the rationale.
class StringResource16Base : public StringResourceBase,
                             public v8::String::ExternalStringResource { … };

class StringResource16 final : public StringResource16Base { … };

class ParkableStringResource16 final : public StringResource16Base { … };

class StringResource8Base : public StringResourceBase,
                            public v8::String::ExternalOneByteStringResource { … };

class StringResource8 final : public StringResource8Base { … };

class ParkableStringResource8 final : public StringResource8Base { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_STRING_RESOURCE_H_