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authorYuri Kunde Schlesner <yuriks@yuriks.net>2016-03-05 09:10:52 +0100
committerYuri Kunde Schlesner <yuriks@yuriks.net>2016-03-05 09:13:20 +0100
commit6dd05e610aeca5e34439971c1e5589e1a8675e02 (patch)
tree8e131c15ae87776c1a79965f796d8f73ac6d1c60
parentMerge pull request #1429 from mailwl/branch-acu (diff)
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-rw-r--r--src/core/hle/result.h58
1 files changed, 16 insertions, 42 deletions
diff --git a/src/core/hle/result.h b/src/core/hle/result.h
index 0fce5988b..69613fbbb 100644
--- a/src/core/hle/result.h
+++ b/src/core/hle/result.h
@@ -269,7 +269,6 @@ public:
: result_code(error_code)
{
ASSERT(error_code.IsError());
- UpdateDebugPtr();
}
/**
@@ -287,40 +286,37 @@ public:
: result_code(o.result_code)
{
if (!o.empty()) {
- new (&storage) T(*o.GetPointer());
+ new (&object) T(o.object);
}
- UpdateDebugPtr();
}
ResultVal(ResultVal&& o)
: result_code(o.result_code)
{
if (!o.empty()) {
- new (&storage) T(std::move(*o.GetPointer()));
+ new (&object) T(std::move(o.object));
}
- UpdateDebugPtr();
}
~ResultVal() {
if (!empty()) {
- GetPointer()->~T();
+ object.~T();
}
}
ResultVal& operator=(const ResultVal& o) {
if (!empty()) {
if (!o.empty()) {
- *GetPointer() = *o.GetPointer();
+ object = o.object;
} else {
- GetPointer()->~T();
+ object.~T();
}
} else {
if (!o.empty()) {
- new (&storage) T(*o.GetPointer());
+ new (&object) T(o.object);
}
}
result_code = o.result_code;
- UpdateDebugPtr();
return *this;
}
@@ -333,11 +329,10 @@ public:
void emplace(ResultCode success_code, Args&&... args) {
ASSERT(success_code.IsSuccess());
if (!empty()) {
- GetPointer()->~T();
+ object.~T();
}
- new (&storage) T(std::forward<Args>(args)...);
+ new (&object) T(std::forward<Args>(args)...);
result_code = success_code;
- UpdateDebugPtr();
}
/// Returns true if the `ResultVal` contains an error code and no value.
@@ -350,15 +345,15 @@ public:
ResultCode Code() const { return result_code; }
- const T& operator* () const { return *GetPointer(); }
- T& operator* () { return *GetPointer(); }
- const T* operator->() const { return GetPointer(); }
- T* operator->() { return GetPointer(); }
+ const T& operator* () const { return object; }
+ T& operator* () { return object; }
+ const T* operator->() const { return &object; }
+ T* operator->() { return &object; }
/// Returns the value contained in this `ResultVal`, or the supplied default if it is missing.
template <typename U>
T ValueOr(U&& value) const {
- return !empty() ? *GetPointer() : std::move(value);
+ return !empty() ? object : std::move(value);
}
/// Asserts that the result succeeded and returns a reference to it.
@@ -372,31 +367,10 @@ public:
}
private:
- typedef typename std::aligned_storage<sizeof(T), std::alignment_of<T>::value>::type StorageType;
-
- StorageType storage;
+ // A union is used to allocate the storage for the value, while allowing us to construct and
+ // destruct it at will.
+ union { T object; };
ResultCode result_code;
-#ifdef _DEBUG
- // The purpose of this pointer is to aid inspecting the type with a debugger, eliminating the
- // need to cast `storage` to a pointer or pay attention to `result_code`.
- const T* debug_ptr;
-#endif
-
- void UpdateDebugPtr() {
-#ifdef _DEBUG
- debug_ptr = empty() ? nullptr : static_cast<const T*>(static_cast<const void*>(&storage));
-#endif
- }
-
- const T* GetPointer() const {
- ASSERT(!empty());
- return static_cast<const T*>(static_cast<const void*>(&storage));
- }
-
- T* GetPointer() {
- ASSERT(!empty());
- return static_cast<T*>(static_cast<void*>(&storage));
- }
};
/**