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56 lines
1.2 KiB
C++
56 lines
1.2 KiB
C++
// Copyright 2013 Dolphin Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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#pragma once
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#include <cstddef>
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#ifdef _WIN32
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#include <windows.h>
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#endif
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#include "Common/Common.h"
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// This class lets you create a block of anonymous RAM, and then arbitrarily map views into it.
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// Multiple views can mirror the same section of the block, which makes it very convenient for emulating
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// memory mirrors.
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class MemArena
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{
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public:
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void GrabLowMemSpace(size_t size);
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void ReleaseSpace();
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void *CreateView(s64 offset, size_t size, void *base = nullptr);
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void ReleaseView(void *view, size_t size);
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// This only finds 1 GB in 32-bit
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static u8 *Find4GBBase();
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private:
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#ifdef _WIN32
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HANDLE hMemoryMapping;
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#else
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int fd;
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#endif
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};
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enum {
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MV_MIRROR_PREVIOUS = 1,
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MV_FAKE_VMEM = 2,
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MV_WII_ONLY = 4,
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};
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struct MemoryView
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{
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u8 **out_ptr_low;
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u8 **out_ptr;
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u32 virtual_address;
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u32 size;
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u32 flags;
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};
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// Uses a memory arena to set up an emulator-friendly memory map according to
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// a passed-in list of MemoryView structures.
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u8 *MemoryMap_Setup(const MemoryView *views, int num_views, u32 flags, MemArena *arena);
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void MemoryMap_Shutdown(const MemoryView *views, int num_views, u32 flags, MemArena *arena);
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