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-rw-r--r--src/common/virtual_buffer.h36
1 files changed, 30 insertions, 6 deletions
diff --git a/src/common/virtual_buffer.h b/src/common/virtual_buffer.h
index 125cb42f0..91d430036 100644
--- a/src/common/virtual_buffer.h
+++ b/src/common/virtual_buffer.h
@@ -4,29 +4,53 @@
#pragma once
-#include "common/common_funcs.h"
+#include <type_traits>
+#include <utility>
namespace Common {
-void* AllocateMemoryPages(std::size_t size);
-void FreeMemoryPages(void* base, std::size_t size);
+void* AllocateMemoryPages(std::size_t size) noexcept;
+void FreeMemoryPages(void* base, std::size_t size) noexcept;
template <typename T>
-class VirtualBuffer final : NonCopyable {
+class VirtualBuffer final {
public:
+ static_assert(
+ std::is_trivially_constructible_v<T>,
+ "T must be trivially constructible, as non-trivial constructors will not be executed "
+ "with the current allocator");
+
constexpr VirtualBuffer() = default;
explicit VirtualBuffer(std::size_t count) : alloc_size{count * sizeof(T)} {
base_ptr = reinterpret_cast<T*>(AllocateMemoryPages(alloc_size));
}
- ~VirtualBuffer() {
+ ~VirtualBuffer() noexcept {
FreeMemoryPages(base_ptr, alloc_size);
}
+ VirtualBuffer(const VirtualBuffer&) = delete;
+ VirtualBuffer& operator=(const VirtualBuffer&) = delete;
+
+ VirtualBuffer(VirtualBuffer&& other) noexcept
+ : alloc_size{std::exchange(other.alloc_size, 0)}, base_ptr{std::exchange(other.base_ptr),
+ nullptr} {}
+
+ VirtualBuffer& operator=(VirtualBuffer&& other) noexcept {
+ alloc_size = std::exchange(other.alloc_size, 0);
+ base_ptr = std::exchange(other.base_ptr, nullptr);
+ return *this;
+ }
+
void resize(std::size_t count) {
+ const auto new_size = count * sizeof(T);
+ if (new_size == alloc_size) {
+ return;
+ }
+
FreeMemoryPages(base_ptr, alloc_size);
- alloc_size = count * sizeof(T);
+ alloc_size = new_size;
base_ptr = reinterpret_cast<T*>(AllocateMemoryPages(alloc_size));
}