| // 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 "common/Alloc.h" |
| #include "common/Assert.h" |
| #include "dawn_wire/WireClient.h" |
| #include "dawn_wire/client/Client.h" |
| |
| #include <cstring> |
| |
| namespace dawn_wire { namespace client { |
| |
| class InlineMemoryTransferService : public MemoryTransferService { |
| class ReadHandleImpl : public ReadHandle { |
| public: |
| explicit ReadHandleImpl(size_t size) : mSize(size) { |
| } |
| |
| ~ReadHandleImpl() override = default; |
| |
| size_t SerializeCreateSize() override { |
| return 0; |
| } |
| |
| void SerializeCreate(void*) override { |
| } |
| |
| bool DeserializeInitialData(const void* deserializePointer, |
| size_t deserializeSize, |
| const void** data, |
| size_t* dataLength) override { |
| if (deserializeSize != mSize || deserializePointer == nullptr) { |
| return false; |
| } |
| |
| mStagingData = std::unique_ptr<uint8_t[]>(AllocNoThrow<uint8_t>(mSize)); |
| if (!mStagingData) { |
| return false; |
| } |
| memcpy(mStagingData.get(), deserializePointer, mSize); |
| |
| ASSERT(data != nullptr); |
| ASSERT(dataLength != nullptr); |
| *data = mStagingData.get(); |
| *dataLength = mSize; |
| |
| return true; |
| } |
| |
| private: |
| size_t mSize; |
| std::unique_ptr<uint8_t[]> mStagingData; |
| }; |
| |
| class WriteHandleImpl : public WriteHandle { |
| public: |
| explicit WriteHandleImpl(size_t size) : mSize(size) { |
| } |
| |
| ~WriteHandleImpl() override = default; |
| |
| size_t SerializeCreateSize() override { |
| return 0; |
| } |
| |
| void SerializeCreate(void*) override { |
| } |
| |
| std::pair<void*, size_t> Open() override { |
| mStagingData = std::unique_ptr<uint8_t[]>(AllocNoThrow<uint8_t>(mSize)); |
| if (!mStagingData) { |
| return std::make_pair(nullptr, 0); |
| } |
| memset(mStagingData.get(), 0, mSize); |
| return std::make_pair(mStagingData.get(), mSize); |
| } |
| |
| size_t SerializeFlushSize() override { |
| return mSize; |
| } |
| |
| void SerializeFlush(void* serializePointer) override { |
| ASSERT(mStagingData != nullptr); |
| ASSERT(serializePointer != nullptr); |
| memcpy(serializePointer, mStagingData.get(), mSize); |
| } |
| |
| private: |
| size_t mSize; |
| std::unique_ptr<uint8_t[]> mStagingData; |
| }; |
| |
| public: |
| InlineMemoryTransferService() { |
| } |
| ~InlineMemoryTransferService() override = default; |
| |
| ReadHandle* CreateReadHandle(size_t size) override { |
| return new ReadHandleImpl(size); |
| } |
| |
| WriteHandle* CreateWriteHandle(size_t size) override { |
| return new WriteHandleImpl(size); |
| } |
| }; |
| |
| std::unique_ptr<MemoryTransferService> CreateInlineMemoryTransferService() { |
| return std::make_unique<InlineMemoryTransferService>(); |
| } |
| |
| }} // namespace dawn_wire::client |