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-rw-r--r--src/common/virtual_buffer.h23
1 files changed, 18 insertions, 5 deletions
diff --git a/src/common/virtual_buffer.h b/src/common/virtual_buffer.h
index 125cb42f0..363913d45 100644
--- a/src/common/virtual_buffer.h
+++ b/src/common/virtual_buffer.h
@@ -4,25 +4,38 @@
4 4
5#pragma once 5#pragma once
6 6
7#include "common/common_funcs.h" 7#include <utility>
8 8
9namespace Common { 9namespace Common {
10 10
11void* AllocateMemoryPages(std::size_t size); 11void* AllocateMemoryPages(std::size_t size) noexcept;
12void FreeMemoryPages(void* base, std::size_t size); 12void FreeMemoryPages(void* base, std::size_t size) noexcept;
13 13
14template <typename T> 14template <typename T>
15class VirtualBuffer final : NonCopyable { 15class VirtualBuffer final {
16public: 16public:
17 constexpr VirtualBuffer() = default; 17 constexpr VirtualBuffer() = default;
18 explicit VirtualBuffer(std::size_t count) : alloc_size{count * sizeof(T)} { 18 explicit VirtualBuffer(std::size_t count) : alloc_size{count * sizeof(T)} {
19 base_ptr = reinterpret_cast<T*>(AllocateMemoryPages(alloc_size)); 19 base_ptr = reinterpret_cast<T*>(AllocateMemoryPages(alloc_size));
20 } 20 }
21 21
22 ~VirtualBuffer() { 22 ~VirtualBuffer() noexcept {
23 FreeMemoryPages(base_ptr, alloc_size); 23 FreeMemoryPages(base_ptr, alloc_size);
24 } 24 }
25 25
26 VirtualBuffer(const VirtualBuffer&) = delete;
27 VirtualBuffer& operator=(const VirtualBuffer&) = delete;
28
29 VirtualBuffer(VirtualBuffer&& other) noexcept
30 : alloc_size{std::exchange(other.alloc_size, 0)}, base_ptr{std::exchange(other.base_ptr),
31 nullptr} {}
32
33 VirtualBuffer& operator=(VirtualBuffer&& other) noexcept {
34 alloc_size = std::exchange(other.alloc_size, 0);
35 base_ptr = std::exchange(other.base_ptr, nullptr);
36 return *this;
37 }
38
26 void resize(std::size_t count) { 39 void resize(std::size_t count) {
27 FreeMemoryPages(base_ptr, alloc_size); 40 FreeMemoryPages(base_ptr, alloc_size);
28 41