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author | bunnei <bunneidev@gmail.com> | 2020-04-08 23:35:07 +0200 |
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committer | bunnei <bunneidev@gmail.com> | 2020-04-17 06:59:31 +0200 |
commit | 4ba2428c86d95fdfe9c580dd62e4a94309a4661c (patch) | |
tree | 6f69c0be2baa02bd6d298a4c3dd6ee23cf21b41e /src/common/virtual_buffer.h | |
parent | kernel: errors: Add ERR_OUT_OF_RESOURCES. (diff) | |
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Diffstat (limited to '')
-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 000000000..da064e59e --- /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 |