2018-11-28 22:18:09 +00:00
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using Ryujinx.Common;
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2018-08-17 00:47:36 +01:00
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namespace Ryujinx.HLE.HOS.Kernel
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2018-08-15 19:59:51 +01:00
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{
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class KSharedMemory
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{
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2018-11-28 22:18:09 +00:00
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private KPageList PageList;
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private long OwnerPid;
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private MemoryPermission OwnerPermission;
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private MemoryPermission UserPermission;
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public KSharedMemory(
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KPageList PageList,
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long OwnerPid,
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MemoryPermission OwnerPermission,
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MemoryPermission UserPermission)
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{
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this.PageList = PageList;
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this.OwnerPid = OwnerPid;
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this.OwnerPermission = OwnerPermission;
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this.UserPermission = UserPermission;
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}
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2018-08-15 19:59:51 +01:00
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2018-11-28 22:18:09 +00:00
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public KernelResult MapIntoProcess(
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KMemoryManager MemoryManager,
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ulong Address,
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ulong Size,
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KProcess Process,
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MemoryPermission Permission)
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2018-08-15 19:59:51 +01:00
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{
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2018-11-28 22:18:09 +00:00
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ulong PagesCountRounded = BitUtils.DivRoundUp(Size, KMemoryManager.PageSize);
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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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MemoryPermission 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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return MemoryManager.MapPages(Address, PageList, MemoryState.SharedMemory, Permission);
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}
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public KernelResult UnmapFromProcess(
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KMemoryManager 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, KMemoryManager.PageSize);
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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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return MemoryManager.UnmapPages(Address, PageList, MemoryState.SharedMemory);
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2018-08-15 19:59:51 +01:00
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}
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}
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}
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