1  using System;
 2  
 3  namespace Ryujinx.HLE.HOS.Kernel.Memory
 4  {
 5      class SharedMemoryStorage
 6      {
 7          private readonly KernelContext _context;
 8          private readonly KPageList _pageList;
 9          private readonly ulong _size;
10  
11          public SharedMemoryStorage(KernelContext context, KPageList pageList)
12          {
13              _context = context;
14              _pageList = pageList;
15              _size = pageList.GetPagesCount() * KPageTableBase.PageSize;
16  
17              foreach (KPageNode pageNode in pageList)
18              {
19                  ulong address = pageNode.Address - DramMemoryMap.DramBase;
20                  ulong size = pageNode.PagesCount * KPageTableBase.PageSize;
21                  context.CommitMemory(address, size);
22              }
23          }
24  
25          public void ZeroFill()
26          {
27              for (ulong offset = 0; offset < _size; offset += sizeof(ulong))
28              {
29                  GetRef<ulong>(offset) = 0;
30              }
31          }
32  
33          public ref T GetRef<T>(ulong offset) where T : unmanaged
34          {
35              if (_pageList.Nodes.Count == 1)
36              {
37                  ulong address = _pageList.Nodes.First.Value.Address - DramMemoryMap.DramBase;
38                  return ref _context.Memory.GetRef<T>(address + offset);
39              }
40  
41              throw new NotImplementedException("Non-contiguous shared memory is not yet supported.");
42          }
43  
44          public KPageList GetPageList()
45          {
46              return _pageList;
47          }
48      }
49  }