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47 lines
2.0 KiB
47 lines
2.0 KiB
/****************************************************************************
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Copyright (c) 2020-2023 Xiamen Yaji Software Co., Ltd.
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http://www.cocos.com
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#pragma once
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#include <atomic>
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#include <cstdint>
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namespace cc {
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template <typename T, typename = typename std::enable_if_t<std::is_integral<T>::value>>
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class ThreadSafeCounter final {
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public:
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inline T increment() noexcept { return add(1); }
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inline T add(T const v) noexcept { return _counter.fetch_add(v, std::memory_order_relaxed); }
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inline T decrement() noexcept { return subtract(1); }
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inline T subtract(T const v) noexcept { return _counter.fetch_sub(v, std::memory_order_relaxed); }
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inline void set(T const v) noexcept { _counter.store(v, std::memory_order_relaxed); }
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inline T get() const noexcept { return _counter.load(std::memory_order_relaxed); }
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inline void reset() noexcept { set(0); }
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private:
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std::atomic<T> _counter{0};
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};
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} // namespace cc
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