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@ -13,6 +13,7 @@
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#ifndef SRSRAN_TYPE_STORAGE_H
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#define SRSRAN_TYPE_STORAGE_H
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#include <cstddef>
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#include <cstdint>
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#include <type_traits>
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#include <utility>
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@ -32,7 +33,7 @@ union max_alignment_t {
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uint32_t* ptr;
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};
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template <typename T>
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template <typename T, size_t MinSize = 0, size_t AlignSize = 0>
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struct type_storage {
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using value_type = T;
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@ -42,19 +43,29 @@ struct type_storage {
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new (&buffer) T(std::forward<Args>(args)...);
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}
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void destroy() { get().~T(); }
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void copy_ctor(const type_storage<T>& other) { emplace(other.get()); }
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void move_ctor(type_storage<T>&& other) { emplace(std::move(other.get())); }
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void copy_assign(const type_storage<T>& other) { get() = other.get(); }
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void move_assign(type_storage<T>&& other) { get() = std::move(other.get()); }
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void copy_ctor(const type_storage& other) { emplace(other.get()); }
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void move_ctor(type_storage&& other) { emplace(std::move(other.get())); }
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void copy_assign(const type_storage& other) { get() = other.get(); }
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void move_assign(type_storage&& other) { get() = std::move(other.get()); }
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T& get() { return reinterpret_cast<T&>(buffer); }
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const T& get() const { return reinterpret_cast<const T&>(buffer); }
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typename std::aligned_storage<sizeof(T), alignof(T)>::type buffer;
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void* addr() { return static_cast<void*>(&buffer); }
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const void* addr() const { return static_cast<void*>(&buffer); }
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explicit operator void*() { return addr(); }
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const static size_t obj_size = sizeof(T) > MinSize ? sizeof(T) : MinSize;
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const static size_t align_size = alignof(T) > AlignSize ? alignof(T) : AlignSize;
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typename std::aligned_storage<obj_size, align_size>::type buffer;
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};
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template <typename T>
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void copy_if_present_helper(type_storage<T>& lhs, const type_storage<T>& rhs, bool lhs_present, bool rhs_present)
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template <typename T, size_t MinSize, size_t AlignSize>
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void copy_if_present_helper(type_storage<T, MinSize, AlignSize>& lhs,
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const type_storage<T, MinSize, AlignSize>& rhs,
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bool lhs_present,
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bool rhs_present)
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{
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if (lhs_present and rhs_present) {
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lhs.get() = rhs.get();
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@ -67,8 +78,11 @@ void copy_if_present_helper(type_storage<T>& lhs, const type_storage<T>& rhs, bo
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}
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}
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template <typename T>
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void move_if_present_helper(type_storage<T>& lhs, type_storage<T>& rhs, bool lhs_present, bool rhs_present)
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template <typename T, size_t MinSize, size_t AlignSize>
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void move_if_present_helper(type_storage<T, MinSize, AlignSize>& lhs,
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type_storage<T, MinSize, AlignSize>& rhs,
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bool lhs_present,
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bool rhs_present)
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{
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if (lhs_present and rhs_present) {
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lhs.move_assign(std::move(rhs));
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