MemoryOrder.hpp

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/* Copyright 2025 Tapish Narwal
 * SPDX-License-Identifier: MPL-2.0
 */
 
#pragma once
 
#include <concepts>
 
namespace alpaka
{
    namespace mem_order
    {
 
        /**
         * The user requested memory order may be converted to a stronger memory order guarantee if the backend does
         * not support the requested memory ordering
         * If the user requests a memory ordering which is stronger than what is possible, we throw an error statically
         */
 
        struct MemoryOrderTag
        {
        };
 
        struct SeqCst : MemoryOrderTag
        {
        };
 
        struct AcqRel : MemoryOrderTag
        {
        };
 
        struct Release : MemoryOrderTag
        {
        };
 
        struct Acquire : MemoryOrderTag
        {
        };
 
        struct Relaxed : MemoryOrderTag
        {
        };
 
        static constexpr SeqCst seq_cst;
        static constexpr AcqRel acq_rel;
        static constexpr Release release;
        static constexpr Acquire acquire;
        static constexpr Relaxed relaxed;
 
    } // namespace mem_order
 
    template<typename T>
    concept MemoryOrder = std::derived_from<T, mem_order::MemoryOrderTag>;
 
} // namespace alpaka