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// 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);
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