| // Copyright 2019 The Dawn Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include <cstring> |
| #include <memory> |
| #include <utility> |
| |
| #include "dawn/common/Alloc.h" |
| #include "dawn/common/Assert.h" |
| #include "dawn/wire/WireClient.h" |
| #include "dawn/wire/client/Client.h" |
| |
| namespace dawn::wire::client { |
| |
| class InlineMemoryTransferService : public MemoryTransferService { |
| class ReadHandleImpl : public ReadHandle { |
| public: |
| explicit ReadHandleImpl(std::unique_ptr<uint8_t[]> stagingData, size_t size) |
| : mStagingData(std::move(stagingData)), mSize(size) {} |
| |
| ~ReadHandleImpl() override = default; |
| |
| size_t SerializeCreateSize() override { return 0; } |
| |
| void SerializeCreate(void*) override {} |
| |
| const void* GetData() override { return mStagingData.get(); } |
| |
| bool DeserializeDataUpdate(const void* deserializePointer, |
| size_t deserializeSize, |
| size_t offset, |
| size_t size) override { |
| if (deserializeSize != size || deserializePointer == nullptr) { |
| return false; |
| } |
| |
| if (offset > mSize || size > mSize - offset) { |
| return false; |
| } |
| |
| void* start = static_cast<uint8_t*>(mStagingData.get()) + offset; |
| memcpy(start, deserializePointer, size); |
| return true; |
| } |
| |
| private: |
| std::unique_ptr<uint8_t[]> mStagingData; |
| size_t mSize; |
| }; |
| |
| class WriteHandleImpl : public WriteHandle { |
| public: |
| explicit WriteHandleImpl(std::unique_ptr<uint8_t[]> stagingData, size_t size) |
| : mStagingData(std::move(stagingData)), mSize(size) {} |
| |
| ~WriteHandleImpl() override = default; |
| |
| size_t SerializeCreateSize() override { return 0; } |
| |
| void SerializeCreate(void*) override {} |
| |
| void* GetData() override { return mStagingData.get(); } |
| |
| size_t SizeOfSerializeDataUpdate(size_t offset, size_t size) override { |
| ASSERT(offset <= mSize); |
| ASSERT(size <= mSize - offset); |
| return size; |
| } |
| |
| void SerializeDataUpdate(void* serializePointer, size_t offset, size_t size) override { |
| ASSERT(mStagingData != nullptr); |
| ASSERT(serializePointer != nullptr); |
| ASSERT(offset <= mSize); |
| ASSERT(size <= mSize - offset); |
| memcpy(serializePointer, static_cast<uint8_t*>(mStagingData.get()) + offset, size); |
| } |
| |
| private: |
| std::unique_ptr<uint8_t[]> mStagingData; |
| size_t mSize; |
| }; |
| |
| public: |
| InlineMemoryTransferService() {} |
| ~InlineMemoryTransferService() override = default; |
| |
| ReadHandle* CreateReadHandle(size_t size) override { |
| auto stagingData = std::unique_ptr<uint8_t[]>(AllocNoThrow<uint8_t>(size)); |
| if (stagingData) { |
| return new ReadHandleImpl(std::move(stagingData), size); |
| } |
| return nullptr; |
| } |
| |
| WriteHandle* CreateWriteHandle(size_t size) override { |
| auto stagingData = std::unique_ptr<uint8_t[]>(AllocNoThrow<uint8_t>(size)); |
| if (stagingData) { |
| memset(stagingData.get(), 0, size); |
| return new WriteHandleImpl(std::move(stagingData), size); |
| } |
| return nullptr; |
| } |
| }; |
| |
| std::unique_ptr<MemoryTransferService> CreateInlineMemoryTransferService() { |
| return std::make_unique<InlineMemoryTransferService>(); |
| } |
| |
| } // namespace dawn::wire::client |