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https://github.com/wiiu-env/WiiUPluginSystem.git
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79 lines
2.4 KiB
C++
79 lines
2.4 KiB
C++
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// Copyright Catch2 Authors
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.txt or copy at
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// https://www.boost.org/LICENSE_1_0.txt)
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// SPDX-License-Identifier: BSL-1.0
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// Adapted from donated nonius code.
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#ifndef CATCH_OPTIMIZER_HPP_INCLUDED
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#define CATCH_OPTIMIZER_HPP_INCLUDED
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#if defined(_MSC_VER) || defined(__IAR_SYSTEMS_ICC__)
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# include <atomic> // atomic_thread_fence
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#endif
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#include <catch2/internal/catch_move_and_forward.hpp>
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#include <type_traits>
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namespace Catch {
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namespace Benchmark {
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#if defined(__GNUC__) || defined(__clang__)
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template <typename T>
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inline void keep_memory(T* p) {
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asm volatile("" : : "g"(p) : "memory");
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}
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inline void keep_memory() {
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asm volatile("" : : : "memory");
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}
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namespace Detail {
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inline void optimizer_barrier() { keep_memory(); }
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} // namespace Detail
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#elif defined(_MSC_VER) || defined(__IAR_SYSTEMS_ICC__)
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#if defined(_MSVC_VER)
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#pragma optimize("", off)
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#elif defined(__IAR_SYSTEMS_ICC__)
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// For IAR the pragma only affects the following function
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#pragma optimize=disable
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#endif
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template <typename T>
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inline void keep_memory(T* p) {
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// thanks @milleniumbug
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*reinterpret_cast<char volatile*>(p) = *reinterpret_cast<char const volatile*>(p);
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}
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// TODO equivalent keep_memory()
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#if defined(_MSVC_VER)
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#pragma optimize("", on)
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#endif
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namespace Detail {
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inline void optimizer_barrier() {
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std::atomic_thread_fence(std::memory_order_seq_cst);
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}
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} // namespace Detail
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#endif
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template <typename T>
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inline void deoptimize_value(T&& x) {
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keep_memory(&x);
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}
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template <typename Fn, typename... Args>
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inline auto invoke_deoptimized(Fn&& fn, Args&&... args) -> std::enable_if_t<!std::is_same<void, decltype(fn(args...))>::value> {
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deoptimize_value(CATCH_FORWARD(fn) (CATCH_FORWARD(args)...));
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}
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template <typename Fn, typename... Args>
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inline auto invoke_deoptimized(Fn&& fn, Args&&... args) -> std::enable_if_t<std::is_same<void, decltype(fn(args...))>::value> {
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CATCH_FORWARD(fn) (CATCH_FORWARD(args)...);
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}
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} // namespace Benchmark
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} // namespace Catch
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#endif // CATCH_OPTIMIZER_HPP_INCLUDED
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