mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-04 20:18:32 +01:00
481 lines
24 KiB
C++
481 lines
24 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <vapours/common.hpp>
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#include <vapours/assert.hpp>
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namespace ams {
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namespace result::impl {
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class ResultTraits {
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public:
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using BaseType = u32;
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static_assert(std::is_same<BaseType, ::Result>::value, "std::is_same<BaseType, ::Result>::value");
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static constexpr BaseType SuccessValue = BaseType();
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static constexpr BaseType ModuleBits = 9;
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static constexpr BaseType DescriptionBits = 13;
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static constexpr BaseType ReservedBits = 10;
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static_assert(ModuleBits + DescriptionBits + ReservedBits == sizeof(BaseType) * CHAR_BIT, "ModuleBits + DescriptionBits + ReservedBits == sizeof(BaseType) * CHAR_BIT");
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private:
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static constexpr ALWAYS_INLINE BaseType GetBitsValue(BaseType v, int ofs, int num) {
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return (v >> ofs) & ~(~BaseType() << num);
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}
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public:
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static constexpr ALWAYS_INLINE BaseType MakeValue(BaseType module, BaseType description) {
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return (module) | (description << ModuleBits);
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}
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template<BaseType module, BaseType description>
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struct MakeStaticValue : public std::integral_constant<BaseType, MakeValue(module, description)> {
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static_assert(module < (1 << ModuleBits), "Invalid Module");
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static_assert(description < (1 << DescriptionBits), "Invalid Description");
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};
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static constexpr ALWAYS_INLINE BaseType GetModuleFromValue(BaseType value) {
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return GetBitsValue(value, 0, ModuleBits);
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}
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static constexpr ALWAYS_INLINE BaseType GetDescriptionFromValue(BaseType value) {
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return GetBitsValue(value, ModuleBits, DescriptionBits);
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}
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static constexpr ALWAYS_INLINE BaseType GetReservedFromValue(BaseType value) {
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return GetBitsValue(value, ModuleBits + DescriptionBits, ReservedBits);
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}
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static constexpr ALWAYS_INLINE BaseType MaskReservedFromValue(BaseType value) {
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return value & ~(~(~BaseType() << ReservedBits) << (ModuleBits + DescriptionBits));
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}
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static constexpr ALWAYS_INLINE BaseType MergeValueWithReserved(BaseType value, BaseType reserved) {
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return (value << 0) | (reserved << (ModuleBits + DescriptionBits));
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}
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};
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/* Use CRTP for Results. */
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template<typename Self>
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class ResultBase {
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public:
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using BaseType = typename ResultTraits::BaseType;
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static constexpr BaseType SuccessValue = ResultTraits::SuccessValue;
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public:
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constexpr ALWAYS_INLINE BaseType GetModule() const { return ResultTraits::GetModuleFromValue(static_cast<const Self *>(this)->GetValue()); }
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constexpr ALWAYS_INLINE BaseType GetDescription() const { return ResultTraits::GetDescriptionFromValue(static_cast<const Self *>(this)->GetValue()); }
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};
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class ResultInternalAccessor;
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}
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class ResultSuccess;
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class Result final : public result::impl::ResultBase<Result> {
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friend class result::impl::ResultInternalAccessor;
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public:
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using Base = typename result::impl::ResultBase<Result>;
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private:
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typename Base::BaseType m_value;
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private:
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/* TODO: Maybe one-day, the result constructor. */
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public:
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Result() { /* ... */ }
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/* TODO: It sure would be nice to make this private. */
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constexpr ALWAYS_INLINE Result(typename Base::BaseType v) : m_value(v) { static_assert(std::is_same<typename Base::BaseType, ::Result>::value); }
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constexpr ALWAYS_INLINE operator ResultSuccess() const;
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static constexpr ALWAYS_INLINE bool CanAccept(Result) { return true; }
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constexpr ALWAYS_INLINE bool IsSuccess() const { return m_value == Base::SuccessValue; }
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constexpr ALWAYS_INLINE bool IsFailure() const { return !this->IsSuccess(); }
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constexpr ALWAYS_INLINE typename Base::BaseType GetModule() const { return Base::GetModule(); }
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constexpr ALWAYS_INLINE typename Base::BaseType GetDescription() const { return Base::GetDescription(); }
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constexpr ALWAYS_INLINE typename Base::BaseType GetInnerValue() const { return ::ams::result::impl::ResultTraits::MaskReservedFromValue(m_value); }
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constexpr ALWAYS_INLINE typename Base::BaseType GetValue() const { return m_value; }
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};
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static_assert(sizeof(Result) == sizeof(Result::Base::BaseType), "sizeof(Result) == sizeof(Result::Base::BaseType)");
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static_assert(std::is_trivially_destructible<Result>::value, "std::is_trivially_destructible<Result>::value");
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namespace result::impl {
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class ResultInternalAccessor {
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public:
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static constexpr ALWAYS_INLINE Result MakeResult(ResultTraits::BaseType value) {
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return Result(value);
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}
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static constexpr ALWAYS_INLINE ResultTraits::BaseType GetReserved(Result result) {
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return ResultTraits::GetReservedFromValue(result.m_value);
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}
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static constexpr ALWAYS_INLINE Result MergeReserved(Result result, ResultTraits::BaseType reserved) {
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return Result(ResultTraits::MergeValueWithReserved(ResultTraits::MaskReservedFromValue(result.m_value), reserved));
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}
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};
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constexpr ALWAYS_INLINE Result MakeResult(ResultTraits::BaseType value) {
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return ResultInternalAccessor::MakeResult(value);
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}
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}
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class ResultSuccess final : public result::impl::ResultBase<ResultSuccess> {
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public:
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using Base = typename result::impl::ResultBase<ResultSuccess>;
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public:
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constexpr ALWAYS_INLINE operator Result() const { return result::impl::MakeResult(Base::SuccessValue); }
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static constexpr ALWAYS_INLINE bool CanAccept(Result result) { return result.IsSuccess(); }
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constexpr ALWAYS_INLINE bool IsSuccess() const { return true; }
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constexpr ALWAYS_INLINE bool IsFailure() const { return !this->IsSuccess(); }
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constexpr ALWAYS_INLINE typename Base::BaseType GetValue() const { return Base::SuccessValue; }
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};
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namespace result::impl {
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NORETURN NOINLINE void OnResultAssertion(const char *file, int line, const char *func, const char *expr, Result result);
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NORETURN NOINLINE void OnResultAssertion(Result result);
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NORETURN NOINLINE void OnResultAbort(const char *file, int line, const char *func, const char *expr, Result result);
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NORETURN NOINLINE void OnResultAbort(Result result);
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}
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constexpr ALWAYS_INLINE Result::operator ResultSuccess() const {
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if (!ResultSuccess::CanAccept(*this)) {
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result::impl::OnResultAbort(*this);
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}
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return ResultSuccess();
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}
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namespace result::impl {
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template<ResultTraits::BaseType _Module, ResultTraits::BaseType _Description>
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class ResultErrorBase : public ResultBase<ResultErrorBase<_Module, _Description>> {
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public:
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using Base = typename result::impl::ResultBase<ResultErrorBase<_Module, _Description>>;
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static constexpr typename Base::BaseType Module = _Module;
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static constexpr typename Base::BaseType Description = _Description;
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static constexpr typename Base::BaseType Value = ResultTraits::MakeStaticValue<Module, Description>::value;
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static_assert(Value != Base::SuccessValue, "Value != Base::SuccessValue");
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public:
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constexpr ALWAYS_INLINE operator Result() const { return MakeResult(Value); }
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constexpr ALWAYS_INLINE operator ResultSuccess() const {
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OnResultAbort(Value);
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__builtin_unreachable();
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return ResultSuccess();
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}
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constexpr ALWAYS_INLINE bool IsSuccess() const { return false; }
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constexpr ALWAYS_INLINE bool IsFailure() const { return !this->IsSuccess(); }
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constexpr ALWAYS_INLINE typename Base::BaseType GetValue() const { return Value; }
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};
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template<ResultTraits::BaseType _Module, ResultTraits::BaseType DescStart, ResultTraits::BaseType DescEnd>
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class ResultErrorRangeBase {
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private:
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/* NOTE: GCC does not optimize the module/description comparisons into one check (as of 10/1/2021) */
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/* and so this optimizes result comparisons to get the same codegen as Nintendo does. */
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static constexpr bool UseDirectValueComparison = true;
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public:
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static constexpr ResultTraits::BaseType Module = _Module;
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static constexpr ResultTraits::BaseType DescriptionStart = DescStart;
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static constexpr ResultTraits::BaseType DescriptionEnd = DescEnd;
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static_assert(DescriptionStart <= DescriptionEnd, "DescriptionStart <= DescriptionEnd");
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static constexpr typename ResultTraits::BaseType StartValue = ResultTraits::MakeStaticValue<Module, DescriptionStart>::value;
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static constexpr typename ResultTraits::BaseType EndValue = ResultTraits::MakeStaticValue<Module, DescriptionEnd>::value;
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public:
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static constexpr ALWAYS_INLINE bool Includes(Result result) {
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if constexpr (UseDirectValueComparison) {
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const auto inner_value = result.GetInnerValue();
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if constexpr (StartValue == EndValue) {
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return inner_value == StartValue;
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} else {
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return StartValue <= inner_value && inner_value <= EndValue;
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}
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} else {
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return result.GetModule() == Module && DescriptionStart <= result.GetDescription() && result.GetDescription() <= DescriptionEnd;
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}
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}
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};
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}
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#if defined(ATMOSPHERE_BOARD_NINTENDO_NX) && defined(ATMOSPHERE_ARCH_ARM64) && defined(ATMOSPHERE_IS_STRATOSPHERE)
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namespace diag::impl {
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void FatalErrorByResultForNx(Result result) noexcept NORETURN;
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}
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#endif
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}
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/* Macros for defining new results. */
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#define R_DEFINE_NAMESPACE_RESULT_MODULE(value) namespace impl::result { static constexpr inline ::ams::result::impl::ResultTraits::BaseType ResultModuleId = value; }
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#define R_CURRENT_NAMESPACE_RESULT_MODULE impl::result::ResultModuleId
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#define R_NAMESPACE_MODULE_ID(nmspc) nmspc::R_CURRENT_NAMESPACE_RESULT_MODULE
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#define R_MAKE_NAMESPACE_RESULT(nmspc, desc) static_cast<::ams::Result>(::ams::result::impl::ResultTraits::MakeValue(R_NAMESPACE_MODULE_ID(nmspc), desc))
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#define R_DEFINE_ERROR_RESULT_IMPL(name, desc_start, desc_end) \
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class Result##name final : public ::ams::result::impl::ResultErrorBase<R_CURRENT_NAMESPACE_RESULT_MODULE, desc_start>, public ::ams::result::impl::ResultErrorRangeBase<R_CURRENT_NAMESPACE_RESULT_MODULE, desc_start, desc_end> {}
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#define R_DEFINE_ABSTRACT_ERROR_RESULT_IMPL(name, desc_start, desc_end) \
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class Result##name final : public ::ams::result::impl::ResultErrorRangeBase<R_CURRENT_NAMESPACE_RESULT_MODULE, desc_start, desc_end> {}
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#define R_DEFINE_ERROR_RESULT(name, desc) R_DEFINE_ERROR_RESULT_IMPL(name, desc, desc)
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#define R_DEFINE_ERROR_RANGE(name, start, end) R_DEFINE_ERROR_RESULT_IMPL(name, start, end)
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#define R_DEFINE_ABSTRACT_ERROR_RESULT(name, desc) R_DEFINE_ABSTRACT_ERROR_RESULT_IMPL(name, desc, desc)
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#define R_DEFINE_ABSTRACT_ERROR_RANGE(name, start, end) R_DEFINE_ABSTRACT_ERROR_RESULT_IMPL(name, start, end)
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/* Remove libnx macros, replace with our own. */
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#ifndef R_SUCCEEDED
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#error "R_SUCCEEDED not defined."
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#endif
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#undef R_SUCCEEDED
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#ifndef R_FAILED
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#error "R_FAILED not defined"
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#endif
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#undef R_FAILED
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#define R_SUCCEEDED(res) (static_cast<::ams::Result>(res).IsSuccess())
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#define R_FAILED(res) (static_cast<::ams::Result>(res).IsFailure())
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/* NOTE: The following are experimental and cannot be safely used yet. */
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/* =================================================================== */
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constinit inline ::ams::Result __TmpCurrentResultReference = ::ams::ResultSuccess();
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namespace ams::result::impl {
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template<auto EvaluateResult, class F>
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class ScopedResultGuard {
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NON_COPYABLE(ScopedResultGuard);
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NON_MOVEABLE(ScopedResultGuard);
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private:
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Result &m_ref;
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F m_f;
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public:
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constexpr ALWAYS_INLINE ScopedResultGuard(Result &ref, F f) : m_ref(ref), m_f(std::move(f)) { }
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constexpr ALWAYS_INLINE ~ScopedResultGuard() { if (EvaluateResult(m_ref)) { m_f(); } }
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};
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template<auto EvaluateResult>
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class ResultReferenceForScopedResultGuard {
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private:
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Result &m_ref;
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public:
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constexpr ALWAYS_INLINE ResultReferenceForScopedResultGuard(Result &r) : m_ref(r) { /* ... */ }
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constexpr ALWAYS_INLINE operator Result &() const { return m_ref; }
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};
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template<auto EvaluateResult, typename F>
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constexpr ALWAYS_INLINE ScopedResultGuard<EvaluateResult, F> operator+(ResultReferenceForScopedResultGuard<EvaluateResult> ref, F&& f) {
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return ScopedResultGuard<EvaluateResult, F>(static_cast<Result &>(ref), std::forward<F>(f));
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}
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constexpr ALWAYS_INLINE bool EvaluateResultSuccess(const ::ams::Result &r) { return R_SUCCEEDED(r); }
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constexpr ALWAYS_INLINE bool EvaluateResultFailure(const ::ams::Result &r) { return R_FAILED(r); }
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template<typename R>
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constexpr ALWAYS_INLINE bool EvaluateResultIncludedImplForSuccessCompatibility(const ::ams::Result &r) {
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if constexpr (std::same_as<R, ::ams::ResultSuccess>) {
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return R_SUCCEEDED(r);
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} else {
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return R::Includes(r);
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}
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}
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template<typename... Rs>
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constexpr ALWAYS_INLINE bool EvaluateAnyResultIncludes(const ::ams::Result &r) { return (EvaluateResultIncludedImplForSuccessCompatibility<Rs>(r) || ...); }
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template<typename... Rs>
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constexpr ALWAYS_INLINE bool EvaluateResultNotIncluded(const ::ams::Result &r) { return !EvaluateAnyResultIncludes<Rs...>(r); }
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}
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#define AMS_DECLARE_CURRENT_RESULT_REFERENCE_AND_STORAGE(COUNTER_VALUE) \
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[[maybe_unused]] constexpr bool HasPrevRef_##COUNTER_VALUE = std::same_as<decltype(__TmpCurrentResultReference), Result &>; \
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[[maybe_unused]] auto &PrevRef_##COUNTER_VALUE = __TmpCurrentResultReference; \
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[[maybe_unused]] Result __tmp_result_##COUNTER_VALUE = ResultSuccess(); \
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::ams::Result &__TmpCurrentResultReference = HasPrevRef_##COUNTER_VALUE ? PrevRef_##COUNTER_VALUE : __tmp_result_##COUNTER_VALUE
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#define ON_RESULT_RETURN_IMPL(...) \
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static_assert(std::same_as<decltype(__TmpCurrentResultReference), Result &>); \
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auto ANONYMOUS_VARIABLE(RESULT_GUARD_STATE_) = ::ams::result::impl::ResultReferenceForScopedResultGuard<__VA_ARGS__>(__TmpCurrentResultReference) + [&]() ALWAYS_INLINE_LAMBDA
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#define ON_RESULT_FAILURE_2 ON_RESULT_RETURN_IMPL(::ams::result::impl::EvaluateResultFailure)
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#define ON_RESULT_FAILURE \
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AMS_DECLARE_CURRENT_RESULT_REFERENCE_AND_STORAGE(__COUNTER__); \
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ON_RESULT_FAILURE_2
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#define ON_RESULT_SUCCESS_2 ON_RESULT_RETURN_IMPL(::ams::result::impl::EvaluateResultSuccess)
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#define ON_RESULT_SUCCESS \
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AMS_DECLARE_CURRENT_RESULT_REFERENCE_AND_STORAGE(__COUNTER__); \
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ON_RESULT_SUCCESS_2
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#define ON_RESULT_INCLUDED_2(...) ON_RESULT_RETURN_IMPL(::ams::result::impl::EvaluateAnyResultIncludes<__VA_ARGS__>)
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#define ON_RESULT_INCLUDED(...) \
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AMS_DECLARE_CURRENT_RESULT_REFERENCE_AND_STORAGE(__COUNTER__); \
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ON_RESULT_INCLUDED_2(__VA_ARGS__)
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#define ON_RESULT_NOT_INCLUDED_2(...) ON_RESULT_RETURN_IMPL(::ams::result::impl::EvaluateResultNotIncluded<__VA_ARGS__>)
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#define ON_RESULT_NOT_INCLUDED(...) \
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AMS_DECLARE_CURRENT_RESULT_REFERENCE_AND_STORAGE(__COUNTER__); \
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ON_RESULT_NOT_INCLUDED_2(__VA_ARGS__)
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#define ON_RESULT_FAILURE_BESIDES(...) ON_RESULT_NOT_INCLUDED(::ams::ResultSuccess, ## __VA_ARGS__)
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#define ON_RESULT_FAILURE_BESIDES_2(...) ON_RESULT_NOT_INCLUDED_2(::ams::ResultSuccess, ## __VA_ARGS__)
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/* =================================================================== */
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/// Returns a result.
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#define R_THROW(res_expr) \
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{ \
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const ::ams::Result _tmp_r_throw_rc = (res_expr); \
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if constexpr (std::same_as<decltype(__TmpCurrentResultReference), ::ams::Result &>) { __TmpCurrentResultReference = _tmp_r_throw_rc; } \
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return _tmp_r_throw_rc; \
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}
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/// Returns ResultSuccess()
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#define R_SUCCEED() R_THROW(::ams::ResultSuccess())
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/// Evaluates an expression that returns a result, and returns the result if it would fail.
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#define R_TRY(res_expr) \
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{ \
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if (const auto _tmp_r_try_rc = (res_expr); R_FAILED(_tmp_r_try_rc)) { \
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R_THROW(_tmp_r_try_rc); \
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} \
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}
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/// Return a result.
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#define R_RETURN(res_expr) R_THROW(res_expr)
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#if defined(ATMOSPHERE_BOARD_NINTENDO_NX) && defined(ATMOSPHERE_IS_STRATOSPHERE) && !defined(AMS_ENABLE_DETAILED_ASSERTIONS) && !defined(AMS_BUILD_FOR_DEBUGGING) && !defined(AMS_BUILD_FOR_AUDITING)
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#define AMS_CALL_ON_RESULT_ASSERTION_IMPL(cond, val) do { ::ams::diag::impl::FatalErrorByResultForNx(val); AMS_INFINITE_LOOP(); AMS_ASSUME(false); } while (false)
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#define AMS_CALL_ON_RESULT_ABORT_IMPL(cond, val) do { ::ams::diag::impl::FatalErrorByResultForNx(val); AMS_INFINITE_LOOP(); AMS_ASSUME(false); } while (false)
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#else
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#if defined(AMS_ENABLE_DETAILED_ASSERTIONS)
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#define AMS_CALL_ON_RESULT_ASSERTION_IMPL(cond, val) ::ams::result::impl::OnResultAssertion(__FILE__, __LINE__, __PRETTY_FUNCTION__, cond, val)
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#define AMS_CALL_ON_RESULT_ABORT_IMPL(cond, val) ::ams::result::impl::OnResultAbort(__FILE__, __LINE__, __PRETTY_FUNCTION__, cond, val)
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#else
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#define AMS_CALL_ON_RESULT_ASSERTION_IMPL(cond, val) ::ams::result::impl::OnResultAssertion("", 0, "", "", val)
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#define AMS_CALL_ON_RESULT_ABORT_IMPL(cond, val) ::ams::result::impl::OnResultAbort("", 0, "", "", val)
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#endif
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#endif
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/// Evaluates an expression that returns a result, and asserts the result if it would fail.
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#ifdef AMS_ENABLE_ASSERTIONS
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#define R_ASSERT(res_expr) \
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{ \
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if (const auto _tmp_r_assert_rc = (res_expr); AMS_UNLIKELY(R_FAILED(_tmp_r_assert_rc))) { \
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AMS_CALL_ON_RESULT_ASSERTION_IMPL(#res_expr, _tmp_r_assert_rc); \
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} \
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}
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#else
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#define R_ASSERT(res_expr) AMS_UNUSED((res_expr));
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#endif
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/// Evaluates an expression that returns a result, and aborts if the result would fail.
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#define R_ABORT_UNLESS(res_expr) \
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{ \
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if (const auto _tmp_r_abort_rc = (res_expr); AMS_UNLIKELY(R_FAILED(_tmp_r_abort_rc))) { \
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AMS_CALL_ON_RESULT_ABORT_IMPL(#res_expr, _tmp_r_abort_rc); \
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} \
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}
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/// Evaluates a boolean expression, and returns a result unless that expression is true.
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#define R_UNLESS(expr, res) \
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{ \
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if (!(expr)) { \
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R_THROW(res); \
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} \
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}
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/// Evaluates a boolean expression, and succeeds if that expression is true.
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#define R_SUCCEED_IF(expr) R_UNLESS(!(expr), ResultSuccess())
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|
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/// Helpers for pattern-matching on a result expression, if the result would fail.
|
|
#define R_CURRENT_RESULT _tmp_r_try_catch_current_result
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|
|
|
#define R_TRY_CATCH(res_expr) \
|
|
{ \
|
|
const auto R_CURRENT_RESULT = (res_expr); \
|
|
if (R_FAILED(R_CURRENT_RESULT)) { \
|
|
if (false)
|
|
|
|
#define R_CATCH(...) \
|
|
} else if (::ams::result::impl::EvaluateAnyResultIncludes<__VA_ARGS__>(R_CURRENT_RESULT)) { \
|
|
if (true)
|
|
|
|
#define R_CATCH_MODULE(__module__) \
|
|
} else if ((R_CURRENT_RESULT).GetModule() == ::ams::R_NAMESPACE_MODULE_ID(__module__)) { \
|
|
if (true)
|
|
|
|
#define R_CONVERT(catch_type, convert_type) \
|
|
R_CATCH(catch_type) { R_THROW(static_cast<::ams::Result>(convert_type)); }
|
|
|
|
#define R_CATCH_ALL() \
|
|
} else if (R_FAILED(R_CURRENT_RESULT)) { \
|
|
if (true)
|
|
|
|
#define R_CONVERT_ALL(convert_type) \
|
|
R_CATCH_ALL() { R_THROW(static_cast<::ams::Result>(convert_type)); }
|
|
|
|
#define R_CATCH_RETHROW(catch_type) \
|
|
R_CONVERT(catch_type, R_CURRENT_RESULT)
|
|
|
|
#define R_END_TRY_CATCH \
|
|
else if (R_FAILED(R_CURRENT_RESULT)) { \
|
|
R_THROW(R_CURRENT_RESULT); \
|
|
} \
|
|
} \
|
|
}
|
|
|
|
#define R_END_TRY_CATCH_WITH_ASSERT \
|
|
else { \
|
|
R_ASSERT(R_CURRENT_RESULT); \
|
|
} \
|
|
} \
|
|
}
|
|
|
|
|
|
#define R_END_TRY_CATCH_WITH_ABORT_UNLESS \
|
|
else { \
|
|
R_ABORT_UNLESS(R_CURRENT_RESULT); \
|
|
} \
|
|
} \
|
|
}
|
|
|
|
|