Refactor SystemInfo and implement macOS system info backend (#1177)

1 files changed, 97 insertions, 0 deletions

diff --git a/Ryujinx.Common/SystemInfo/MacOSSysteminfo.cs b/Ryujinx.Common/SystemInfo/MacOSSysteminfo.cs
new file mode 100644
index 00000000..167c96db
--- /dev/null
+++ b/Ryujinx.Common/SystemInfo/MacOSSysteminfo.cs
@@ -0,0 +1,97 @@
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Text;
+using Ryujinx.Common.Logging;
+
+namespace Ryujinx.Common.SystemInfo
+{
+    internal class MacOSSysteminfo : SystemInfo
+    {
+        public override string CpuName { get; }
+        public override ulong RamSize { get; }
+
+        [DllImport("libSystem.dylib", CharSet = CharSet.Ansi, SetLastError = true)]
+        private static extern int sysctlbyname(string name, IntPtr oldValue, ref ulong oldSize, IntPtr newValue, ulong newValueSize);
+
+        private static int sysctlbyname(string name, IntPtr oldValue, ref ulong oldSize)
+        {
+            if (sysctlbyname(name, oldValue, ref oldSize, IntPtr.Zero, 0) == -1)
+            {
+                return Marshal.GetLastWin32Error();
+            }
+
+            return 0;
+        }
+
+        private static int sysctlbyname<T>(string name, ref T oldValue)
+        {
+            unsafe
+            {
+                ulong oldValueSize = (ulong)Unsafe.SizeOf<T>();
+
+                return sysctlbyname(name, (IntPtr)Unsafe.AsPointer(ref oldValue), ref oldValueSize);
+            }
+        }
+
+        private static int sysctlbyname(string name, out string oldValue)
+        {
+            oldValue = default;
+
+            ulong strSize = 0;
+
+            int res = sysctlbyname(name, IntPtr.Zero, ref strSize);
+
+            if (res == 0)
+            {
+                byte[] rawData = new byte[strSize];
+
+                unsafe
+                {
+                    fixed (byte* rawDataPtr = rawData)
+                    {
+                        res = sysctlbyname(name, (IntPtr)rawDataPtr, ref strSize);
+                    }
+
+                    if (res == 0)
+                    {
+                        oldValue = Encoding.ASCII.GetString(rawData);
+                    }
+                }
+            }
+
+            return res;
+        }
+
+        public MacOSSysteminfo()
+        {
+            ulong ramSize = 0;
+
+            int res = sysctlbyname("hw.memsize", ref ramSize);
+
+            if (res == 0)
+            {
+                RamSize = ramSize;
+            }
+            else
+            {
+                Logger.PrintError(LogClass.Application, $"Cannot get memory size, sysctlbyname error: {res}");
+
+                RamSize = 0;
+            }
+
+            res = sysctlbyname("machdep.cpu.brand_string", out string cpuName);
+
+            if (res == 0)
+            {
+                CpuName = cpuName;
+            }
+            else
+            {
+                Logger.PrintError(LogClass.Application, $"Cannot get CPU name, sysctlbyname error: {res}");
+
+                CpuName = "Unknown";
+            }
+        }
+    }
+}
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