73 lines
1.7 KiB
C++
73 lines
1.7 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "Common/MemArena.h"
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#include <cstddef>
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#include <cstdlib>
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#include <set>
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#include <string>
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#include <windows.h>
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#include "Common/CommonFuncs.h"
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#include "Common/CommonTypes.h"
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#include "Common/Logging/Log.h"
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#include "Common/MsgHandler.h"
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#include "Common/StringUtil.h"
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namespace Common
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{
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MemArena::MemArena() = default;
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MemArena::~MemArena() = default;
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void MemArena::GrabSHMSegment(size_t size)
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{
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const std::string name = "dolphin-emu." + std::to_string(GetCurrentProcessId());
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hMemoryMapping = CreateFileMapping(INVALID_HANDLE_VALUE, nullptr, PAGE_READWRITE, 0,
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static_cast<DWORD>(size), UTF8ToTStr(name).c_str());
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}
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void MemArena::ReleaseSHMSegment()
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{
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CloseHandle(hMemoryMapping);
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hMemoryMapping = 0;
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}
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void* MemArena::CreateView(s64 offset, size_t size)
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{
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return MapInMemoryRegion(offset, size, nullptr);
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}
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void MemArena::ReleaseView(void* view, size_t size)
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{
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UnmapFromMemoryRegion(view, size);
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}
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u8* MemArena::ReserveMemoryRegion(size_t memory_size)
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{
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u8* base = static_cast<u8*>(VirtualAlloc(nullptr, memory_size, MEM_RESERVE, PAGE_READWRITE));
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if (!base)
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{
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PanicAlertFmt("Failed to map enough memory space: {}", GetLastErrorString());
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return nullptr;
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}
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VirtualFree(base, 0, MEM_RELEASE);
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return base;
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}
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void MemArena::ReleaseMemoryRegion()
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{
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}
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void* MemArena::MapInMemoryRegion(s64 offset, size_t size, void* base)
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{
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return MapViewOfFileEx(hMemoryMapping, FILE_MAP_ALL_ACCESS, 0, (DWORD)((u64)offset), size, base);
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}
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void MemArena::UnmapFromMemoryRegion(void* view, size_t size)
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{
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UnmapViewOfFile(view);
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}
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} // namespace Common
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