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Query Available RAM on macOS (#4000)
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@ -28,9 +28,39 @@ namespace Ryujinx.Common.SystemInfo
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CpuName = $"{cpuName} ; {LogicalCoreCount} logical";
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RamTotal = totalRAM;
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RamAvailable = GetVMInfoAvailableMemory();
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}
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[DllImport("libSystem.dylib", CharSet = CharSet.Ansi, SetLastError = true)]
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static ulong GetVMInfoAvailableMemory()
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{
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var port = mach_host_self();
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uint pageSize = 0;
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var result = host_page_size(port, ref pageSize);
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if (result != 0)
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{
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Logger.Error?.Print(LogClass.Application, $"Failed to query Available RAM. host_page_size() error = {result}");
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return 0;
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}
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const int flavor = 4; // HOST_VM_INFO64
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uint count = (uint)(Marshal.SizeOf<VMStatistics64>() / sizeof(int)); // HOST_VM_INFO64_COUNT
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VMStatistics64 stats = new();
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result = host_statistics64(port, flavor, ref stats, ref count);
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if (result != 0)
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{
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Logger.Error?.Print(LogClass.Application, $"Failed to query Available RAM. host_statistics64() error = {result}");
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return 0;
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}
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return (ulong)(stats.FreeCount + stats.InactiveCount) * pageSize;
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}
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private const string SystemLibraryName = "libSystem.dylib";
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[DllImport(SystemLibraryName, CharSet = CharSet.Ansi, SetLastError = true)]
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private static extern int sysctlbyname(string name, IntPtr oldValue, ref ulong oldSize, IntPtr newValue, ulong newValueSize);
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private static int sysctlbyname(string name, IntPtr oldValue, ref ulong oldSize)
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@ -85,5 +115,43 @@ namespace Ryujinx.Common.SystemInfo
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return res;
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}
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[DllImport(SystemLibraryName, CharSet = CharSet.Ansi, SetLastError = true)]
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private static extern uint mach_host_self();
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[DllImport(SystemLibraryName, CharSet = CharSet.Ansi, SetLastError = true)]
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private static extern int host_page_size(uint host, ref uint out_page_size);
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[StructLayout(LayoutKind.Sequential, Pack = 8)]
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struct VMStatistics64
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{
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public uint FreeCount;
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public uint ActiveCount;
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public uint InactiveCount;
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public uint WireCount;
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public ulong ZeroFillCount;
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public ulong Reactivations;
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public ulong Pageins;
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public ulong Pageouts;
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public ulong Faults;
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public ulong CowFaults;
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public ulong Lookups;
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public ulong Hits;
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public ulong Purges;
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public uint PurgeableCount;
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public uint SpeculativeCount;
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public ulong Decompressions;
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public ulong Compressions;
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public ulong Swapins;
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public ulong Swapouts;
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public uint CompressorPageCount;
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public uint ThrottledCount;
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public uint ExternalPageCount;
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public uint InternalPageCount;
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public ulong TotalUncompressedPagesInCompressor;
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}
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[DllImport(SystemLibraryName, CharSet = CharSet.Ansi, SetLastError = true)]
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private static extern int host_statistics64(uint host_priv, int host_flavor, ref VMStatistics64 host_info64_out, ref uint host_info64_outCnt);
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}
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}
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