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985c397 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | #pragma once
#include <atomic>
namespace fastsignals::detail
{
class spin_mutex
{
public:
spin_mutex() = default;
spin_mutex(const spin_mutex&) = delete;
spin_mutex& operator=(const spin_mutex&) = delete;
spin_mutex(spin_mutex&&) = delete;
spin_mutex& operator=(spin_mutex&&) = delete;
inline bool try_lock() noexcept
{
return !m_busy.test_and_set(std::memory_order_acquire);
}
inline void lock() noexcept
{
while (!try_lock())
{
/* do nothing */;
}
}
inline void unlock() noexcept
{
m_busy.clear(std::memory_order_release);
}
private:
std::atomic_flag m_busy = ATOMIC_FLAG_INIT;
};
} // namespace fastsignals::detail
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