jeanlemotan
48 lines
1.1 KiB
C++
48 lines
1.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Copyright (c) Lewis Baker
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// Licenced under MIT license. See LICENSE.txt for details.
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///////////////////////////////////////////////////////////////////////////////
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#ifndef CPPCORO_SPIN_MUTEX_HPP_INCLUDED
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#define CPPCORO_SPIN_MUTEX_HPP_INCLUDED
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#include <atomic>
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namespace cppcoro
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{
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class spin_mutex
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{
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public:
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/// Initialise the mutex to the unlocked state.
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spin_mutex() noexcept;
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/// Attempt to lock the mutex without blocking
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///
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/// \return
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/// true if the lock was acquired, false if the lock was already held
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/// and could not be immediately acquired.
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bool try_lock() noexcept;
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/// Block the current thread until the lock is acquired.
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///
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/// This will busy-wait until it acquires the lock.
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///
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/// This has 'acquire' memory semantics and synchronises
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/// with prior calls to unlock().
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void lock() noexcept;
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/// Release the lock.
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///
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/// This has 'release' memory semantics and synchronises with
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/// lock() and try_lock().
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void unlock() noexcept;
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private:
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std::atomic<bool> m_isLocked;
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};
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}
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#endif
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