virtual_buffer: Add compile-time type-safety guarantees with VirtualBuffer
VirtualBuffer makes use of VirtualAlloc (on Windows) and mmap() (on other platforms). Neither of these ensure that non-trivial objects are properly constructed in the allocated memory. To prevent potential undefined behavior occurring due to that, we can add a static assert to loudly complain about cases where that is done.
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@ -4,6 +4,7 @@
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#pragma once
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#include <type_traits>
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#include <utility>
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namespace Common {
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@ -14,6 +15,11 @@ void FreeMemoryPages(void* base, std::size_t size) noexcept;
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template <typename T>
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class VirtualBuffer final {
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public:
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static_assert(
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std::is_trivially_constructible_v<T>,
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"T must be trivially constructible, as non-trivial constructors will not be executed "
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"with the current allocator");
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constexpr VirtualBuffer() = default;
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explicit VirtualBuffer(std::size_t count) : alloc_size{count * sizeof(T)} {
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base_ptr = reinterpret_cast<T*>(AllocateMemoryPages(alloc_size));
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