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[C++] hide the m_codecStatePtr behind ifdefs to avoid overhead when p… #1036

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merged 1 commit into from
Dec 13, 2024
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[C++] hide the m_codecStatePtr behind ifdefs to avoid overhead when p… #1036

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30 changes: 26 additions & 4 deletions sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/cpp/CppGenerator.java
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Original file line number Diff line number Diff line change
Expand Up @@ -694,6 +694,7 @@ private void generateGroupClassHeader(

if (null != fieldPrecedenceModel)
{
sb.append("#if defined(").append(precedenceChecksFlagName).append(")\n");
new Formatter(sb).format(
indent + " CodecState *m_codecStatePtr = nullptr;\n\n" +

Expand All @@ -710,19 +711,38 @@ private void generateGroupClassHeader(
indent + " void codecState(CodecState codecState)\n" +
indent + " {\n" +
indent + " *m_codecStatePtr = codecState;\n" +
indent + " }\n\n"
indent + " }\n"
);
sb.append("#else\n");
new Formatter(sb).format(
indent + " CodecState codecState() const SBE_NOEXCEPT\n" +
indent + " {\n" +
indent + " return " + qualifiedStateCase(fieldPrecedenceModel.notWrappedState()) + ";\n" +
indent + " }\n\n" +

indent + " CodecState *codecStatePtr()\n" +
indent + " {\n" +
indent + " return nullptr;\n" +
indent + " }\n\n" +

indent + " void codecState(CodecState codecState)\n" +
indent + " {\n" +
indent + " }\n"
);
sb.append("#endif\n\n");
}

sb.append(generateHiddenCopyConstructor(indent + " ", groupClassName));

final String codecStateParameter = null == fieldPrecedenceModel ?
")\n" :
",\n " + indent + " CodecState *codecState)\n";
",\n" + indent + " CodecState *codecState)\n";

final String codecStateAssignment = null == fieldPrecedenceModel ?
"" :
indent + " m_codecStatePtr = codecState;\n";
"#if defined(" + precedenceChecksFlagName + ")\n" +
indent + " m_codecStatePtr = codecState;\n" +
"#endif\n";

new Formatter(sb).format(
indent + "public:\n" +
Expand Down Expand Up @@ -802,7 +822,9 @@ private void generateGroupClassHeader(
{
final String codecStateNullAssignment = null == fieldPrecedenceModel ?
"" :
indent + " m_codecStatePtr = nullptr;\n";
"#if defined(" + precedenceChecksFlagName + ")\n" +
indent + " m_codecStatePtr = nullptr;\n" +
"#endif\n";

new Formatter(sb).format(
indent + " inline void notPresent(std::uint64_t actingVersion)\n" +
Expand Down
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