diff options
| author | bunnei <bunneidev@gmail.com> | 2020-04-08 17:35:07 -0400 |
|---|---|---|
| committer | bunnei <bunneidev@gmail.com> | 2020-04-17 00:59:31 -0400 |
| commit | 4ba2428c86d95fdfe9c580dd62e4a94309a4661c (patch) | |
| tree | 6f69c0be2baa02bd6d298a4c3dd6ee23cf21b41e /src/common/virtual_buffer.h | |
| parent | a238d08f71082ae7b4d53f78a30383cf4669583f (diff) | |
common: Add VirtualBuffer class, to abstract memory virtualization.
Diffstat (limited to 'src/common/virtual_buffer.h')
| -rw-r--r-- | src/common/virtual_buffer.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/common/virtual_buffer.h b/src/common/virtual_buffer.h new file mode 100644 index 0000000000..da064e59e1 --- /dev/null +++ b/src/common/virtual_buffer.h @@ -0,0 +1,58 @@ +// Copyright 2020 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include "common/common_funcs.h" + +namespace Common { + +void* AllocateMemoryPages(std::size_t size); +void FreeMemoryPages(void* base, std::size_t size); + +template <typename T> +class VirtualBuffer final : NonCopyable { +public: + constexpr VirtualBuffer() = default; + explicit VirtualBuffer(std::size_t count) : alloc_size{count * sizeof(T)} { + base_ptr = reinterpret_cast<T*>(AllocateMemoryPages(alloc_size)); + } + + ~VirtualBuffer() { + FreeMemoryPages(base_ptr, alloc_size); + } + + void resize(std::size_t count) { + FreeMemoryPages(base_ptr, alloc_size); + + alloc_size = count * sizeof(T); + base_ptr = reinterpret_cast<T*>(AllocateMemoryPages(alloc_size)); + } + + constexpr const T& operator[](std::size_t index) const { + return base_ptr[index]; + } + + constexpr T& operator[](std::size_t index) { + return base_ptr[index]; + } + + constexpr T* data() { + return base_ptr; + } + + constexpr const T* data() const { + return base_ptr; + } + + constexpr std::size_t size() const { + return alloc_size / sizeof(T); + } + +private: + std::size_t alloc_size{}; + T* base_ptr{}; +}; + +} // namespace Common |