forked from dolphin-emu/dolphin
59 lines
1.3 KiB
C++
59 lines
1.3 KiB
C++
// Copyright 2008 Dolphin Emulator Project
|
|
// Licensed under GPLv2+
|
|
// Refer to the license.txt file included.
|
|
|
|
#pragma once
|
|
|
|
#include <cstddef>
|
|
|
|
#ifdef _WIN32
|
|
#include <windows.h>
|
|
#endif
|
|
|
|
#include "Common/CommonTypes.h"
|
|
|
|
// This class lets you create a block of anonymous RAM, and then arbitrarily map views into it.
|
|
// Multiple views can mirror the same section of the block, which makes it very convenient for emulating
|
|
// memory mirrors.
|
|
|
|
class MemArena
|
|
{
|
|
public:
|
|
void GrabSHMSegment(size_t size);
|
|
void ReleaseSHMSegment();
|
|
void* CreateView(s64 offset, size_t size, void* base = nullptr);
|
|
void ReleaseView(void* view, size_t size);
|
|
|
|
// This finds 1 GB in 32-bit, 16 GB in 64-bit.
|
|
static u8* FindMemoryBase();
|
|
private:
|
|
|
|
#ifdef _WIN32
|
|
HANDLE hMemoryMapping;
|
|
#else
|
|
int fd;
|
|
#endif
|
|
};
|
|
|
|
enum {
|
|
MV_MIRROR_PREVIOUS = 1,
|
|
MV_FAKE_VMEM = 2,
|
|
MV_WII_ONLY = 4,
|
|
};
|
|
|
|
struct MemoryView
|
|
{
|
|
u8** out_ptr;
|
|
u64 virtual_address;
|
|
u32 size;
|
|
u32 flags;
|
|
void* mapped_ptr;
|
|
void* view_ptr;
|
|
u32 shm_position;
|
|
};
|
|
|
|
// Uses a memory arena to set up an emulator-friendly memory map according to
|
|
// a passed-in list of MemoryView structures.
|
|
u8* MemoryMap_Setup(MemoryView* views, int num_views, u32 flags, MemArena* arena);
|
|
void MemoryMap_Shutdown(MemoryView* views, int num_views, u32 flags, MemArena* arena);
|