2
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6
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9
21
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26
29 constexpr void lock()
const noexcept {}
31 constexpr bool try_lock()
const noexcept {
return true; }
33 constexpr void unlock()
const noexcept {}
A class to be used as null_mutex.
constexpr void unlock() const noexcept
constexpr bool try_lock() const noexcept
constexpr void lock() const noexcept