mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-11-10 07:06:34 +00:00
496adb0018
* Work around Clang's incomplete C++20 support for omitting typename * vapours: fix Clang error about missing return in constexpr function * stratosphere: fix call to non-constexpr strlen in constexpr function strlen being constexpr is a non-compliant GCC extension; Clang explicitly rejects it: https://reviews.llvm.org/D23692 * stratosphere: add a bunch of missing override specifiers * stratosphere: work around Clang consteval bug Minimal example: https://godbolt.org/z/MoM64v93M The issue seems to be that Clang does not consider f(x) to be a constant expression if x comes from a template argument that isn't a non-type auto template argument (???) We can work around this by relaxing GetMessageHeaderForCheck (by using constexpr instead of consteval). This produces no functional changes because the result of GetMessageHeaderForCheck() is assigned to a constexpr variable, so the result is guaranteed to be computed at compile-time. * stratosphere: fix missing require clauses in definitions GCC not requiring the require clauses to be repeated for member definitions is actually a compiler bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96830 Clang rejects declarations with missing require clauses. * Fix ALWAYS_INLINE_LAMBDA and parameter list relative order While GCC doesn't seem to care about the position of the always_inline attribute relative to the parameter list, Clang is very picky and requires the attribute to appear after the parameter list (and before a trailing return type) * stratosphere: fix static constexpr member variable with incomplete type GCC accepts this for some reason (because of the lambda?) but Clang correctly rejects this.
370 lines
16 KiB
C++
370 lines
16 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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}
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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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/// 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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const auto _tmp_r_try_rc = (res_expr); \
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if (R_FAILED(_tmp_r_try_rc)) { \
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return _tmp_r_try_rc; \
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} \
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})
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#ifdef AMS_ENABLE_DEBUG_PRINT
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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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/// 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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const auto _tmp_r_assert_rc = (res_expr); \
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if (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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const auto _tmp_r_abort_rc = (res_expr); \
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if (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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return static_cast<::ams::Result>(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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/// Helpers for pattern-matching on a result expression, if the result would fail.
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#define R_CURRENT_RESULT _tmp_r_current_result
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#define R_TRY_CATCH(res_expr) \
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({ \
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const auto R_CURRENT_RESULT = (res_expr); \
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if (R_FAILED(R_CURRENT_RESULT)) { \
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if (false)
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namespace ams::result::impl {
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template<typename... Rs>
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constexpr ALWAYS_INLINE bool AnyIncludes(Result result) {
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return (Rs::Includes(result) || ...);
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}
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}
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#define R_CATCH(...) \
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} else if (::ams::result::impl::AnyIncludes<__VA_ARGS__>(R_CURRENT_RESULT)) { \
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if (true)
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#define R_CATCH_MODULE(__module__) \
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} else if ((R_CURRENT_RESULT).GetModule() == ::ams::R_NAMESPACE_MODULE_ID(__module__)) { \
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if (true)
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#define R_CONVERT(catch_type, convert_type) \
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R_CATCH(catch_type) { return static_cast<::ams::Result>(convert_type); }
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#define R_CATCH_ALL() \
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} else if (R_FAILED(R_CURRENT_RESULT)) { \
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if (true)
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#define R_CONVERT_ALL(convert_type) \
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R_CATCH_ALL() { return static_cast<::ams::Result>(convert_type); }
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#define R_CATCH_RETHROW(catch_type) \
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R_CONVERT(catch_type, R_CURRENT_RESULT)
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#define R_END_TRY_CATCH \
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else if (R_FAILED(R_CURRENT_RESULT)) { \
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return R_CURRENT_RESULT; \
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} \
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} \
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})
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#define R_END_TRY_CATCH_WITH_ASSERT \
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else { \
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R_ASSERT(R_CURRENT_RESULT); \
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} \
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} \
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})
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#define R_END_TRY_CATCH_WITH_ABORT_UNLESS \
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else { \
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R_ABORT_UNLESS(R_CURRENT_RESULT); \
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} \
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} \
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})
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