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ams: prefer construct_at/destroy_at over placement new/explicit destructor

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This commit is contained in:
Michael Scire 2021-03-21 20:30:40 -07:00
parent aff0da9427
commit d84dcb653d
49 changed files with 217 additions and 171 deletions
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10
libraries/libvapours/include/vapours/util/util_bounded_map.hpp
View file

@ -29,7 +29,7 @@ namespace ams::util {
private:
ALWAYS_INLINE void FreeEntry(size_t i) {
this->keys[i].reset();
GetReference(this->values[i]).~Value();
DestroyAt(this->values[i]);
}
public:
constexpr BoundedMap() : keys(), values() { /* ... */ }
@ -78,7 +78,7 @@ namespace ams::util {
for (size_t i = 0; i < N; i++) {
if (!this->keys[i]) {
this->keys[i] = key;
new (GetPointer(this->values[i])) Value(std::move(value));
ConstructAt(this->values[i], std::forward<Value>(value));
return true;
}
}
@ -90,7 +90,7 @@ namespace ams::util {
/* Try to find and assign an existing value. */
for (size_t i = 0; i < N; i++) {
if (this->keys[i] && this->keys[i].value() == key) {
GetReference(this->values[i]) = std::move(value);
GetReference(this->values[i]) = std::forward<Value>(value);
return true;
}
}
@ -99,7 +99,7 @@ namespace ams::util {
for (size_t i = 0; i < N; i++) {
if (!this->keys[i]) {
this->keys[i] = key;
new (GetPointer(this->values[i])) Value(std::move(value));
ConstructAt(this->values[i], std::move(value));
return true;
}
}
@ -118,7 +118,7 @@ namespace ams::util {
for (size_t i = 0; i < N; i++) {
if (!this->keys[i]) {
this->keys[i] = key;
new (GetPointer(this->values[i])) Value(std::forward<Args>(args)...);
ConstructAt(this->values[i], std::forward<Args>(args)...);
return true;
}
}

2
libraries/libvapours/include/vapours/util/util_scope_guard.hpp
View file

@ -36,6 +36,8 @@ namespace ams::util {
ALWAYS_INLINE ScopeGuard(ScopeGuard&& rhs) : f(std::move(rhs.f)), active(rhs.active) {
rhs.Cancel();
}
ScopeGuard &operator=(ScopeGuard&& rhs) = delete;
};
template<class F>

42
libraries/libvapours/include/vapours/util/util_typed_storage.hpp
View file

@ -45,4 +45,46 @@ namespace ams::util {
return *GetPointer(ts);
}
template<typename T, typename... Args>
static constexpr ALWAYS_INLINE T *ConstructAt(TypedStorage<T> &ts, Args &&... args) {
return std::construct_at(GetPointer(ts), std::forward<Args>(args)...);
}
template<typename T>
static constexpr ALWAYS_INLINE void DestroyAt(TypedStorage<T> &ts) {
return std::destroy_at(GetPointer(ts));
}
namespace impl {
template<typename T>
class TypedStorageGuard {
NON_COPYABLE(TypedStorageGuard);
private:
TypedStorage<T> &m_ts;
bool m_active;
public:
template<typename... Args>
constexpr ALWAYS_INLINE TypedStorageGuard(TypedStorage<T> &ts, Args &&... args) : m_ts(ts), m_active(true) {
ConstructAt(m_ts, std::forward<Args>(args)...);
}
ALWAYS_INLINE ~TypedStorageGuard() { if (m_active) { DestroyAt(m_ts); } }
ALWAYS_INLINE void Cancel() { m_active = false; }
ALWAYS_INLINE TypedStorageGuard(TypedStorageGuard&& rhs) : m_ts(rhs.m_ts), m_active(rhs.m_active) {
rhs.Cancel();
}
TypedStorageGuard &operator=(TypedStorageGuard&& rhs) = delete;
};
}
template<typename T, typename... Args>
static constexpr ALWAYS_INLINE impl::TypedStorageGuard<T> ConstructAtGuarded(TypedStorage<T> &ts, Args &&... args) {
return impl::TypedStorageGuard<T>(ts, std::forward<Args>(args)...);
}
}