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-rw-r--r--src/core/hle/result.h120
1 files changed, 114 insertions, 6 deletions
diff --git a/src/core/hle/result.h b/src/core/hle/result.h
index 47a1b829b..e20e0bfee 100644
--- a/src/core/hle/result.h
+++ b/src/core/hle/result.h
@@ -5,6 +5,7 @@
#include "common/assert.h"
#include "common/bit_field.h"
+#include "common/common_funcs.h"
#include "common/common_types.h"
#include "common/expected.h"
@@ -130,6 +131,10 @@ union Result {
[[nodiscard]] constexpr bool IsError() const {
return !IsSuccess();
}
+
+ [[nodiscard]] constexpr bool IsFailure() const {
+ return !IsSuccess();
+ }
};
static_assert(std::is_trivial_v<Result>);
@@ -349,10 +354,110 @@ private:
} \
} while (false)
-#define R_SUCCEEDED(res) (res.IsSuccess())
+#define R_SUCCEEDED(res) (static_cast<Result>(res).IsSuccess())
+#define R_FAILED(res) (static_cast<Result>(res).IsFailure())
-/// Evaluates a boolean expression, and succeeds if that expression is true.
-#define R_SUCCEED_IF(expr) R_UNLESS(!(expr), ResultSuccess)
+namespace ResultImpl {
+template <auto EvaluateResult, class F>
+class ScopedResultGuard {
+ YUZU_NON_COPYABLE(ScopedResultGuard);
+ YUZU_NON_MOVEABLE(ScopedResultGuard);
+
+private:
+ Result& m_ref;
+ F m_f;
+
+public:
+ constexpr ScopedResultGuard(Result& ref, F f) : m_ref(ref), m_f(std::move(f)) {}
+ constexpr ~ScopedResultGuard() {
+ if (EvaluateResult(m_ref)) {
+ m_f();
+ }
+ }
+};
+
+template <auto EvaluateResult>
+class ResultReferenceForScopedResultGuard {
+private:
+ Result& m_ref;
+
+public:
+ constexpr ResultReferenceForScopedResultGuard(Result& r) : m_ref(r) {}
+ constexpr operator Result&() const {
+ return m_ref;
+ }
+};
+
+template <auto EvaluateResult, typename F>
+constexpr ScopedResultGuard<EvaluateResult, F> operator+(
+ ResultReferenceForScopedResultGuard<EvaluateResult> ref, F&& f) {
+ return ScopedResultGuard<EvaluateResult, F>(static_cast<Result&>(ref), std::forward<F>(f));
+}
+
+constexpr bool EvaluateResultSuccess(const Result& r) {
+ return R_SUCCEEDED(r);
+}
+constexpr bool EvaluateResultFailure(const Result& r) {
+ return R_FAILED(r);
+}
+
+template <typename T>
+constexpr void UpdateCurrentResultReference(T result_reference, Result result) {
+ ASSERT(false);
+}
+
+template <>
+constexpr void UpdateCurrentResultReference<Result&>(Result& result_reference, Result result) {
+ result_reference = result;
+}
+
+template <>
+constexpr void UpdateCurrentResultReference<Result>(Result result_reference, Result result) {}
+} // namespace ResultImpl
+
+#define DECLARE_CURRENT_RESULT_REFERENCE_AND_STORAGE(COUNTER_VALUE) \
+ [[maybe_unused]] constexpr bool HasPrevRef_##COUNTER_VALUE = \
+ std::same_as<decltype(__TmpCurrentResultReference), Result&>; \
+ [[maybe_unused]] auto& PrevRef_##COUNTER_VALUE = __TmpCurrentResultReference; \
+ [[maybe_unused]] Result __tmp_result_##COUNTER_VALUE = ResultSuccess; \
+ Result& __TmpCurrentResultReference = \
+ HasPrevRef_##COUNTER_VALUE ? PrevRef_##COUNTER_VALUE : __tmp_result_##COUNTER_VALUE
+
+#define ON_RESULT_RETURN_IMPL(...) \
+ static_assert(std::same_as<decltype(__TmpCurrentResultReference), Result&>); \
+ auto RESULT_GUARD_STATE_##__COUNTER__ = \
+ ResultImpl::ResultReferenceForScopedResultGuard<__VA_ARGS__>( \
+ __TmpCurrentResultReference) + \
+ [&]()
+
+#define ON_RESULT_FAILURE_2 ON_RESULT_RETURN_IMPL(ResultImpl::EvaluateResultFailure)
+
+#define ON_RESULT_FAILURE \
+ DECLARE_CURRENT_RESULT_REFERENCE_AND_STORAGE(__COUNTER__); \
+ ON_RESULT_FAILURE_2
+
+#define ON_RESULT_SUCCESS_2 ON_RESULT_RETURN_IMPL(ResultImpl::EvaluateResultSuccess)
+
+#define ON_RESULT_SUCCESS \
+ DECLARE_CURRENT_RESULT_REFERENCE_AND_STORAGE(__COUNTER__); \
+ ON_RESULT_SUCCESS_2
+
+constexpr inline Result __TmpCurrentResultReference = ResultSuccess;
+
+/// Returns a result.
+#define R_RETURN(res_expr) \
+ { \
+ const Result _tmp_r_throw_rc = (res_expr); \
+ ResultImpl::UpdateCurrentResultReference<decltype(__TmpCurrentResultReference)>( \
+ __TmpCurrentResultReference, _tmp_r_throw_rc); \
+ return _tmp_r_throw_rc; \
+ }
+
+/// Returns ResultSuccess()
+#define R_SUCCEED() R_RETURN(ResultSuccess)
+
+/// Throws a result.
+#define R_THROW(res_expr) R_RETURN(res_expr)
/// Evaluates a boolean expression, and returns a result unless that expression is true.
#define R_UNLESS(expr, res) \
@@ -361,7 +466,7 @@ private:
if (res.IsError()) { \
LOG_ERROR(Kernel, "Failed with result: {}", res.raw); \
} \
- return res; \
+ R_THROW(res); \
} \
}
@@ -369,7 +474,10 @@ private:
#define R_TRY(res_expr) \
{ \
const auto _tmp_r_try_rc = (res_expr); \
- if (_tmp_r_try_rc.IsError()) { \
- return _tmp_r_try_rc; \
+ if (R_FAILED(_tmp_r_try_rc)) { \
+ R_THROW(_tmp_r_try_rc); \
} \
}
+
+/// Evaluates a boolean expression, and succeeds if that expression is true.
+#define R_SUCCEED_IF(expr) R_UNLESS(!(expr), ResultSuccess)