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Kernel: static vs non-static constexpr variables
Problem: - `static` variables consume memory and sometimes are less optimizable. - `static const` variables can be `constexpr`, usually. - `static` function-local variables require an initialization check every time the function is run. Solution: - If a global `static` variable is only used in a single function then move it into the function and make it non-`static` and `constexpr`. - Make all global `static` variables `constexpr` instead of `const`. - Change function-local `static const[expr]` variables to be just `constexpr`.
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15 changed files with 30 additions and 37 deletions
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@ -84,8 +84,8 @@ private:
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bool m_use_mmio { false };
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EntropySource m_entropy_source;
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static const size_t number_of_rx_descriptors = 32;
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static const size_t number_of_tx_descriptors = 8;
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static constexpr size_t number_of_rx_descriptors = 32;
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static constexpr size_t number_of_tx_descriptors = 8;
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WaitQueue m_wait_queue;
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};
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