59 lines
1.4 KiB
C++
59 lines
1.4 KiB
C++
// Copyright 2020 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include "common/common_funcs.h"
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namespace Common {
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void* AllocateMemoryPages(std::size_t size);
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void FreeMemoryPages(void* base, std::size_t size);
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template <typename T>
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class VirtualBuffer final : NonCopyable {
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public:
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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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}
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~VirtualBuffer() {
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FreeMemoryPages(base_ptr, alloc_size);
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}
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void resize(std::size_t count) {
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FreeMemoryPages(base_ptr, alloc_size);
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alloc_size = count * sizeof(T);
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base_ptr = reinterpret_cast<T*>(AllocateMemoryPages(alloc_size));
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}
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[[nodiscard]] constexpr const T& operator[](std::size_t index) const {
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return base_ptr[index];
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}
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[[nodiscard]] constexpr T& operator[](std::size_t index) {
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return base_ptr[index];
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}
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[[nodiscard]] constexpr T* data() {
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return base_ptr;
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}
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[[nodiscard]] constexpr const T* data() const {
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return base_ptr;
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}
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[[nodiscard]] constexpr std::size_t size() const {
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return alloc_size / sizeof(T);
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}
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private:
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std::size_t alloc_size{};
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T* base_ptr{};
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};
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} // namespace Common
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