Update OpenAL-soft to 1.21.1

2026-08-17 11:11:35 +02:00 · 2021-02-11 18:04:50 +08:00
parent 08f227997e
commit 904cc75ba8
358 changed files with 61122 additions and 60973 deletions
@@ -0,0 +1,161 @@
+#ifndef AL_OPTIONAL_H
+#define AL_OPTIONAL_H
+
+#include <initializer_list>
+#include <type_traits>
+#include <utility>
+
+#include "almalloc.h"
+
+namespace al {
+
+struct nullopt_t { };
+struct in_place_t { };
+
+constexpr nullopt_t nullopt{};
+constexpr in_place_t in_place{};
+
+
+template<typename T, bool = std::is_trivially_destructible<T>::value>
+struct optional_storage;
+
+template<typename T>
+struct optional_storage<T, true> {
+    bool mHasValue{false};
+    union {
+        char mDummy;
+        T mValue;
+    };
+
+    optional_storage() { }
+    template<typename ...Args>
+    explicit optional_storage(in_place_t, Args&& ...args)
+        : mHasValue{true}, mValue{std::forward<Args>(args)...}
+    { }
+    ~optional_storage() = default;
+};
+
+template<typename T>
+struct optional_storage<T, false> {
+    bool mHasValue{false};
+    union {
+        char mDummy;
+        T mValue;
+    };
+
+    optional_storage() { }
+    template<typename ...Args>
+    explicit optional_storage(in_place_t, Args&& ...args)
+        : mHasValue{true}, mValue{std::forward<Args>(args)...}
+    { }
+    ~optional_storage() { if(mHasValue) al::destroy_at(std::addressof(mValue)); }
+};
+
+template<typename T>
+class optional {
+    using storage_t = optional_storage<T>;
+
+    storage_t mStore;
+
+    template<typename... Args>
+    void doConstruct(Args&& ...args)
+    {
+        ::new(std::addressof(mStore.mValue)) T{std::forward<Args>(args)...};
+        mStore.mHasValue = true;
+    }
+
+public:
+    using value_type = T;
+
+    optional() = default;
+    optional(nullopt_t) noexcept { }
+    optional(const optional &rhs) { if(rhs) doConstruct(*rhs); }
+    optional(optional&& rhs) { if(rhs) doConstruct(std::move(*rhs)); }
+    template<typename ...Args>
+    explicit optional(in_place_t, Args&& ...args)
+        : mStore{al::in_place, std::forward<Args>(args)...}
+    { }
+    ~optional() = default;
+
+    optional& operator=(nullopt_t) noexcept { reset(); return *this; }
+    std::enable_if_t<std::is_copy_constructible<T>::value && std::is_copy_assignable<T>::value,
+    optional&> operator=(const optional &rhs)
+    {
+        if(!rhs)
+            reset();
+        else if(*this)
+            mStore.mValue = *rhs;
+        else
+            doConstruct(*rhs);
+        return *this;
+    }
+    std::enable_if_t<std::is_move_constructible<T>::value && std::is_move_assignable<T>::value,
+    optional&> operator=(optional&& rhs)
+    {
+        if(!rhs)
+            reset();
+        else if(*this)
+            mStore.mValue = std::move(*rhs);
+        else
+            doConstruct(std::move(*rhs));
+        return *this;
+    }
+    template<typename U=T>
+    std::enable_if_t<std::is_constructible<T, U>::value
+        && std::is_assignable<T&, U>::value
+        && !std::is_same<std::decay_t<U>, optional<T>>::value
+        && (!std::is_same<std::decay_t<U>, T>::value || !std::is_scalar<U>::value),
+    optional&> operator=(U&& rhs)
+    {
+        if(*this)
+            mStore.mValue = std::forward<U>(rhs);
+        else
+            doConstruct(std::forward<U>(rhs));
+        return *this;
+    }
+
+    const T* operator->() const { return std::addressof(mStore.mValue); }
+    T* operator->() { return std::addressof(mStore.mValue); }
+    const T& operator*() const& { return this->mValue; }
+    T& operator*() & { return mStore.mValue; }
+    const T&& operator*() const&& { return std::move(mStore.mValue); }
+    T&& operator*() && { return std::move(mStore.mValue); }
+
+    operator bool() const noexcept { return mStore.mHasValue; }
+    bool has_value() const noexcept { return mStore.mHasValue; }
+
+    T& value() & { return mStore.mValue; }
+    const T& value() const& { return mStore.mValue; }
+    T&& value() && { return std::move(mStore.mValue); }
+    const T&& value() const&& { return std::move(mStore.mValue); }
+
+    template<typename U>
+    T value_or(U&& defval) const&
+    { return bool{*this} ? **this : static_cast<T>(std::forward<U>(defval)); }
+    template<typename U>
+    T value_or(U&& defval) &&
+    { return bool{*this} ? std::move(**this) : static_cast<T>(std::forward<U>(defval)); }
+
+    void reset() noexcept
+    {
+        if(mStore.mHasValue)
+            al::destroy_at(std::addressof(mStore.mValue));
+        mStore.mHasValue = false;
+    }
+};
+
+template<typename T>
+inline optional<std::decay_t<T>> make_optional(T&& arg)
+{ return optional<std::decay_t<T>>{in_place, std::forward<T>(arg)}; }
+
+template<typename T, typename... Args>
+inline optional<T> make_optional(Args&& ...args)
+{ return optional<T>{in_place, std::forward<Args>(args)...}; }
+
+template<typename T, typename U, typename... Args>
+inline optional<T> make_optional(std::initializer_list<U> il, Args&& ...args)
+{ return optional<T>{in_place, il, std::forward<Args>(args)...}; }
+
+} // namespace al
+
+#endif /* AL_OPTIONAL_H */