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https://github.com/GreemDev/Ryujinx.git
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84 lines
2.5 KiB
C#
84 lines
2.5 KiB
C#
using Ryujinx.Common;
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using Ryujinx.HLE.HOS.Kernel.Common;
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using Ryujinx.HLE.HOS.Kernel.Process;
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namespace Ryujinx.HLE.HOS.Kernel.Memory
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{
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class KSharedMemory : KAutoObject
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{
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private readonly SharedMemoryStorage _storage;
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private readonly ulong _ownerPid;
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private readonly KMemoryPermission _ownerPermission;
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private readonly KMemoryPermission _userPermission;
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public KSharedMemory(
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KernelContext context,
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SharedMemoryStorage storage,
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ulong ownerPid,
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KMemoryPermission ownerPermission,
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KMemoryPermission userPermission) : base(context)
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{
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_storage = storage;
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_ownerPid = ownerPid;
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_ownerPermission = ownerPermission;
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_userPermission = userPermission;
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}
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public KernelResult MapIntoProcess(
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KPageTableBase memoryManager,
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ulong address,
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ulong size,
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KProcess process,
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KMemoryPermission permission)
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{
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ulong pagesCountRounded = BitUtils.DivRoundUp(size, KPageTableBase.PageSize);
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var pageList = _storage.GetPageList();
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if (pageList.GetPagesCount() != pagesCountRounded)
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{
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return KernelResult.InvalidSize;
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}
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KMemoryPermission expectedPermission = process.Pid == _ownerPid
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? _ownerPermission
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: _userPermission;
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if (permission != expectedPermission)
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{
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return KernelResult.InvalidPermission;
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}
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KernelResult result = memoryManager.MapPages(address, pageList, MemoryState.SharedMemory, permission);
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if (result == KernelResult.Success && !memoryManager.SupportsMemoryAliasing)
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{
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_storage.Borrow(process, address);
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}
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return result;
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}
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public KernelResult UnmapFromProcess(
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KPageTableBase memoryManager,
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ulong address,
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ulong size,
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KProcess process)
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{
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ulong pagesCountRounded = BitUtils.DivRoundUp(size, KPageTableBase.PageSize);
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var pageList = _storage.GetPageList();
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ulong pagesCount = pageList.GetPagesCount();
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if (pagesCount != pagesCountRounded)
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{
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return KernelResult.InvalidSize;
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}
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var ranges = _storage.GetRanges();
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return memoryManager.UnmapPages(address, pagesCount, ranges, MemoryState.SharedMemory);
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}
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}
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} |