102 lines
3.9 KiB
C
102 lines
3.9 KiB
C
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// Copyright 2020 The Dawn Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef DAWNWIRE_CHUNKEDCOMMANDSERIALIZER_H_
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#define DAWNWIRE_CHUNKEDCOMMANDSERIALIZER_H_
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#include "common/Compiler.h"
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#include "dawn_wire/Wire.h"
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#include "dawn_wire/WireCmd_autogen.h"
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#include <algorithm>
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#include <cstring>
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namespace dawn_wire {
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class ChunkedCommandSerializer {
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public:
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ChunkedCommandSerializer(CommandSerializer* serializer);
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template <typename Cmd>
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void SerializeCommand(const Cmd& cmd) {
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SerializeCommand(cmd, 0, [](char*) {});
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}
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template <typename Cmd, typename ExtraSizeSerializeFn>
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void SerializeCommand(const Cmd& cmd,
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size_t extraSize,
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ExtraSizeSerializeFn&& SerializeExtraSize) {
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SerializeCommandImpl(
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cmd,
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[](const Cmd& cmd, size_t requiredSize, char* allocatedBuffer) {
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cmd.Serialize(requiredSize, allocatedBuffer);
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},
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extraSize, std::forward<ExtraSizeSerializeFn>(SerializeExtraSize));
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}
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template <typename Cmd>
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void SerializeCommand(const Cmd& cmd, const ObjectIdProvider& objectIdProvider) {
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SerializeCommand(cmd, objectIdProvider, 0, [](char*) {});
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}
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template <typename Cmd, typename ExtraSizeSerializeFn>
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void SerializeCommand(const Cmd& cmd,
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const ObjectIdProvider& objectIdProvider,
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size_t extraSize,
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ExtraSizeSerializeFn&& SerializeExtraSize) {
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SerializeCommandImpl(
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cmd,
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[&objectIdProvider](const Cmd& cmd, size_t requiredSize, char* allocatedBuffer) {
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cmd.Serialize(requiredSize, allocatedBuffer, objectIdProvider);
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},
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extraSize, std::forward<ExtraSizeSerializeFn>(SerializeExtraSize));
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}
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private:
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template <typename Cmd, typename SerializeCmdFn, typename ExtraSizeSerializeFn>
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void SerializeCommandImpl(const Cmd& cmd,
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SerializeCmdFn&& SerializeCmd,
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size_t extraSize,
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ExtraSizeSerializeFn&& SerializeExtraSize) {
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size_t commandSize = cmd.GetRequiredSize();
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size_t requiredSize = commandSize + extraSize;
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if (requiredSize <= mMaxAllocationSize) {
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char* allocatedBuffer = static_cast<char*>(mSerializer->GetCmdSpace(requiredSize));
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if (allocatedBuffer != nullptr) {
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SerializeCmd(cmd, requiredSize, allocatedBuffer);
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SerializeExtraSize(allocatedBuffer + commandSize);
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}
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return;
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}
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auto cmdSpace = std::unique_ptr<char[]>(new (std::nothrow) char[requiredSize]);
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if (!cmdSpace) {
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return;
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}
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SerializeCmd(cmd, requiredSize, cmdSpace.get());
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SerializeExtraSize(cmdSpace.get() + commandSize);
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SerializeChunkedCommand(cmdSpace.get(), requiredSize);
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}
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void SerializeChunkedCommand(const char* allocatedBuffer, size_t remainingSize);
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CommandSerializer* mSerializer;
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size_t mMaxAllocationSize;
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};
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} // namespace dawn_wire
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#endif // DAWNWIRE_CHUNKEDCOMMANDSERIALIZER_H_
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