mirror of
https://github.com/yuzu-emu/yuzu.git
synced 2024-08-23 23:17:19 +02:00
common: Add VirtualBuffer class, to abstract memory virtualization.
This commit is contained in:
parent
a238d08f71
commit
4ba2428c86
@ -155,6 +155,8 @@ add_library(common STATIC
|
||||
uuid.cpp
|
||||
uuid.h
|
||||
vector_math.h
|
||||
virtual_buffer.cpp
|
||||
virtual_buffer.h
|
||||
web_result.h
|
||||
zstd_compression.cpp
|
||||
zstd_compression.h
|
||||
|
52
src/common/virtual_buffer.cpp
Normal file
52
src/common/virtual_buffer.cpp
Normal file
@ -0,0 +1,52 @@
|
||||
// Copyright 2020 yuzu Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#ifdef _WIN32
|
||||
#include <windows.h>
|
||||
#else
|
||||
#include <stdio.h>
|
||||
#include <sys/mman.h>
|
||||
#include <sys/types.h>
|
||||
#if defined __APPLE__ || defined __FreeBSD__ || defined __OpenBSD__
|
||||
#include <sys/sysctl.h>
|
||||
#elif defined __HAIKU__
|
||||
#include <OS.h>
|
||||
#else
|
||||
#include <sys/sysinfo.h>
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#include "common/assert.h"
|
||||
#include "common/virtual_buffer.h"
|
||||
|
||||
namespace Common {
|
||||
|
||||
void* AllocateMemoryPages(std::size_t size) {
|
||||
#ifdef _WIN32
|
||||
void* base{VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_READWRITE)};
|
||||
#else
|
||||
void* base{mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0)};
|
||||
|
||||
if (base == MAP_FAILED) {
|
||||
base = nullptr;
|
||||
}
|
||||
#endif
|
||||
|
||||
ASSERT(base);
|
||||
|
||||
return base;
|
||||
}
|
||||
|
||||
void FreeMemoryPages(void* base, std::size_t size) {
|
||||
if (!base) {
|
||||
return;
|
||||
}
|
||||
#ifdef _WIN32
|
||||
ASSERT(VirtualFree(base, 0, MEM_RELEASE));
|
||||
#else
|
||||
ASSERT(munmap(base, size) == 0);
|
||||
#endif
|
||||
}
|
||||
|
||||
} // namespace Common
|
58
src/common/virtual_buffer.h
Normal file
58
src/common/virtual_buffer.h
Normal file
@ -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
|
Loading…
Reference in New Issue
Block a user