43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
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// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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// Author: seongkim@google.com (Seong Beom Kim)
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// Based on original Protocol Buffers design by
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// Sanjay Ghemawat, Jeff Dean, and others.
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#ifndef GOOGLE_PROTOBUF_COMPILER_CPP_PADDING_OPTIMIZER_H__
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#define GOOGLE_PROTOBUF_COMPILER_CPP_PADDING_OPTIMIZER_H__
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#include "google/protobuf/compiler/cpp/message_layout_helper.h"
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namespace google {
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namespace protobuf {
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namespace compiler {
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namespace cpp {
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// Rearranges the fields of a message to minimize padding.
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// Fields are grouped by the type and the size.
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// For example, grouping four boolean fields and one int32
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// field results in zero padding overhead. See OptimizeLayout's
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// comment for details.
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class PaddingOptimizer : public MessageLayoutHelper {
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public:
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PaddingOptimizer() {}
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~PaddingOptimizer() override {}
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void OptimizeLayout(std::vector<const FieldDescriptor*>* fields,
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const Options& options,
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MessageSCCAnalyzer* scc_analyzer) override;
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};
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} // namespace cpp
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} // namespace compiler
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} // namespace protobuf
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} // namespace google
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#endif // GOOGLE_PROTOBUF_COMPILER_CPP_PADDING_OPTIMIZER_H__
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