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