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      1 // Copyright 2018 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef MOJO_PUBLIC_CPP_BASE_BIG_BUFFER_MOJOM_TRAITS_H_
      6 #define MOJO_PUBLIC_CPP_BASE_BIG_BUFFER_MOJOM_TRAITS_H_
      7 
      8 #include <cstdint>
      9 #include <vector>
     10 
     11 #include "base/component_export.h"
     12 #include "base/containers/span.h"
     13 #include "base/macros.h"
     14 #include "mojo/public/cpp/base/big_buffer.h"
     15 #include "mojo/public/cpp/bindings/union_traits.h"
     16 #include "mojo/public/cpp/system/buffer.h"
     17 #include "mojo/public/mojom/base/big_buffer.mojom-shared.h"
     18 
     19 namespace mojo {
     20 
     21 template <>
     22 struct COMPONENT_EXPORT(MOJO_BASE_SHARED_TRAITS)
     23     StructTraits<mojo_base::mojom::BigBufferSharedMemoryRegionDataView,
     24                  mojo_base::internal::BigBufferSharedMemoryRegion> {
     25   static uint32_t size(
     26       const mojo_base::internal::BigBufferSharedMemoryRegion& region);
     27   static mojo::ScopedSharedBufferHandle buffer_handle(
     28       mojo_base::internal::BigBufferSharedMemoryRegion& region);
     29 
     30   static bool Read(mojo_base::mojom::BigBufferSharedMemoryRegionDataView data,
     31                    mojo_base::internal::BigBufferSharedMemoryRegion* out);
     32 };
     33 
     34 template <>
     35 struct COMPONENT_EXPORT(MOJO_BASE_SHARED_TRAITS)
     36     UnionTraits<mojo_base::mojom::BigBufferDataView, mojo_base::BigBuffer> {
     37   static mojo_base::mojom::BigBufferDataView::Tag GetTag(
     38       const mojo_base::BigBuffer& buffer);
     39 
     40   static const std::vector<uint8_t>& bytes(const mojo_base::BigBuffer& buffer);
     41   static mojo_base::internal::BigBufferSharedMemoryRegion& shared_memory(
     42       mojo_base::BigBuffer& buffer);
     43 
     44   static bool Read(mojo_base::mojom::BigBufferDataView data,
     45                    mojo_base::BigBuffer* out);
     46 };
     47 
     48 template <>
     49 struct COMPONENT_EXPORT(MOJO_BASE_SHARED_TRAITS)
     50     UnionTraits<mojo_base::mojom::BigBufferDataView, mojo_base::BigBufferView> {
     51   static mojo_base::mojom::BigBufferDataView::Tag GetTag(
     52       const mojo_base::BigBufferView& view);
     53 
     54   static base::span<const uint8_t> bytes(const mojo_base::BigBufferView& view);
     55   static mojo_base::internal::BigBufferSharedMemoryRegion& shared_memory(
     56       mojo_base::BigBufferView& view);
     57 
     58   static bool Read(mojo_base::mojom::BigBufferDataView data,
     59                    mojo_base::BigBufferView* out);
     60 };
     61 
     62 }  // namespace mojo
     63 
     64 #endif  // MOJO_PUBLIC_CPP_BASE_BIG_BUFFER_MOJOM_TRAITS_H_
     65