26 lines
591 B
C++
26 lines
591 B
C++
// Copyright (c) Charles J. Cliffe
|
|
// SPDX-License-Identifier: GPL-2.0+
|
|
|
|
#pragma once
|
|
#include <atomic>
|
|
|
|
// A non-recursive Mutex implemented as a spin-lock.
|
|
class SpinMutex {
|
|
|
|
public:
|
|
SpinMutex() = default;
|
|
|
|
SpinMutex(const SpinMutex&) = delete;
|
|
|
|
SpinMutex& operator=(const SpinMutex&) = delete;
|
|
|
|
~SpinMutex() { lock_state.clear(std::memory_order_release); }
|
|
|
|
void lock() { while (lock_state.test_and_set(std::memory_order_acquire)); }
|
|
|
|
void unlock() { lock_state.clear(std::memory_order_release); }
|
|
|
|
private:
|
|
std::atomic_flag lock_state = ATOMIC_FLAG_INIT;
|
|
};
|