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// 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/Assert.h"
#include "dawn_wire/WireServer.h"
#include "dawn_wire/server/Server.h"
#include <cstring>
namespace dawn_wire { namespace server {
class InlineMemoryTransferService : public MemoryTransferService {
public:
class ReadHandleImpl : public ReadHandle {
public:
ReadHandleImpl() {
}
~ReadHandleImpl() override = default;
size_t SizeOfSerializeDataUpdate(size_t offset, size_t size) override {
return size;
}
void SerializeDataUpdate(const void* data,
size_t offset,
size_t size,
void* serializePointer) override {
if (size > 0) {
ASSERT(data != nullptr);
ASSERT(serializePointer != nullptr);
memcpy(serializePointer, data, size);
}
}
};
class WriteHandleImpl : public WriteHandle {
public:
WriteHandleImpl() {
}
~WriteHandleImpl() override = default;
bool DeserializeDataUpdate(const void* deserializePointer,
size_t deserializeSize,
size_t offset,
size_t size) override {
if (deserializeSize != size || mTargetData == nullptr ||
deserializePointer == nullptr) {
return false;
}
if ((offset >= mDataLength && offset > 0) || size > mDataLength - offset) {
return false;
}
memcpy(static_cast<uint8_t*>(mTargetData) + offset, deserializePointer, size);
return true;
}
};
InlineMemoryTransferService() {
}
~InlineMemoryTransferService() override = default;
bool DeserializeReadHandle(const void* deserializePointer,
size_t deserializeSize,
ReadHandle** readHandle) override {
ASSERT(readHandle != nullptr);
*readHandle = new ReadHandleImpl();
return true;
}
bool DeserializeWriteHandle(const void* deserializePointer,
size_t deserializeSize,
WriteHandle** writeHandle) override {
ASSERT(writeHandle != nullptr);
*writeHandle = new WriteHandleImpl();
return true;
}
};
std::unique_ptr<MemoryTransferService> CreateInlineMemoryTransferService() {
return std::make_unique<InlineMemoryTransferService>();
}
}} // namespace dawn_wire::server