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kern: avoid constexpr init for many objects (avoids unnecessary memory clear) (#1668)

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This commit is contained in:
SciresM
2021-10-23 15:25:20 -07:00
committed by GitHub
parent 20716cb3de
commit 36e4914be8
77 changed files with 489 additions and 339 deletions
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12
libraries/libvapours/include/vapours/freebsd/tree.hpp
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@@ -28,6 +28,7 @@
#pragma once
#include <vapours/common.hpp>
#include <vapours/assert.hpp>
#include <vapours/util/util_type_traits.hpp>
#pragma GCC push_options
#pragma GCC optimize ("-O3")
@@ -57,11 +58,14 @@ namespace ams::freebsd {
template<typename T>
class RBEntry {
private:
T *m_rbe_left = nullptr;
T *m_rbe_right = nullptr;
T *m_rbe_parent = nullptr;
RBColor m_rbe_color = RBColor::RB_BLACK;
T *m_rbe_left ;
T *m_rbe_right;
T *m_rbe_parent;
RBColor m_rbe_color;
public:
constexpr ALWAYS_INLINE explicit RBEntry(util::ConstantInitializeTag) : m_rbe_left(nullptr), m_rbe_right(nullptr), m_rbe_parent(nullptr), m_rbe_color(RBColor::RB_BLACK) { /* ... */ }
explicit ALWAYS_INLINE RBEntry() { /* ... */ }
[[nodiscard]] constexpr ALWAYS_INLINE T *Left() { return m_rbe_left; }
[[nodiscard]] constexpr ALWAYS_INLINE const T *Left() const { return m_rbe_left; }

5
libraries/libvapours/include/vapours/util/util_intrusive_red_black_tree.hpp
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@@ -39,7 +39,8 @@ namespace ams::util {
private:
RBEntry m_entry;
public:
constexpr ALWAYS_INLINE IntrusiveRedBlackTreeNode() = default;
constexpr explicit ALWAYS_INLINE IntrusiveRedBlackTreeNode(util::ConstantInitializeTag) : m_entry(util::ConstantInitialize) { /* ... */ }
explicit ALWAYS_INLINE IntrusiveRedBlackTreeNode() { /* ... */ }
[[nodiscard]] constexpr ALWAYS_INLINE RBEntry &GetRBEntry() { return m_entry; }
[[nodiscard]] constexpr ALWAYS_INLINE const RBEntry &GetRBEntry() const { return m_entry; }
@@ -544,6 +545,8 @@ namespace ams::util {
template<class Derived>
class alignas(void *) IntrusiveRedBlackTreeBaseNode : public IntrusiveRedBlackTreeNode {
public:
using IntrusiveRedBlackTreeNode::IntrusiveRedBlackTreeNode;
constexpr ALWAYS_INLINE Derived *GetPrev() { return static_cast< Derived *>(static_cast< IntrusiveRedBlackTreeBaseNode *>(impl::IntrusiveRedBlackTreeImpl::GetPrev(this))); }
constexpr ALWAYS_INLINE const Derived *GetPrev() const { return static_cast<const Derived *>(static_cast<const IntrusiveRedBlackTreeBaseNode *>(impl::IntrusiveRedBlackTreeImpl::GetPrev(this))); }

5
libraries/libvapours/include/vapours/util/util_tinymt.hpp
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@@ -102,9 +102,8 @@ namespace ams::util {
state2 ^= y;
}
public:
constexpr TinyMT() : m_state() { /* ... */ }
/* Public API. */
constexpr explicit TinyMT(util::ConstantInitializeTag) : m_state() { /* ... */ }
explicit TinyMT() { /* ... */ }
/* Initialization. */
void Initialize(u32 seed) {

3
libraries/libvapours/include/vapours/util/util_type_traits.hpp
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@@ -23,4 +23,7 @@ namespace ams::util {
template<typename T>
using is_pod = std::bool_constant<std::is_standard_layout<T>::value && std::is_trivial<T>::value>;
struct ConstantInitializeTag final {};
constexpr inline const ConstantInitializeTag ConstantInitialize{};
}