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66 lines
2.3 KiB
C++
66 lines
2.3 KiB
C++
///\file
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/******************************************************************************
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The MIT License(MIT)
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Embedded Template Library.
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https://github.com/ETLCPP/etl
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https://www.etlcpp.com
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Copyright(c) 2026 BMW AG
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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
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to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions :
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The above copyright notice and this permission notice shall be included in all
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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 THE
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SOFTWARE.
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******************************************************************************/
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#ifndef ETL_INFINITE_LOOP_INCLUDED
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#define ETL_INFINITE_LOOP_INCLUDED
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#include "platform.h"
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namespace etl
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{
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//*****************************************************************************
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/// An infinite loop that will not be optimised out
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///
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/// Before C++26, an empty infinite loop without side effects is considered
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/// undefined behavior, and may be optimised away by the compiler.
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///
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/// See also
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/// https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2809r1.html
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//*****************************************************************************
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ETL_NORETURN
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inline void infinite_loop()
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{
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while (true)
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{
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#if ETL_NOT_USING_CPP26
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#if defined(ETL_COMPILER_GCC) || defined(ETL_COMPILER_CLANG)
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__asm__ __volatile__("" : : : "memory");
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#elif defined(ETL_COMPILER_MICROSOFT)
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_ReadWriteBarrier();
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#else
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#error "Infinite loop not supported for this compiler and platform"
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#endif
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#endif
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}
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}
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} // namespace etl
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#endif
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