Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Runtime.Caching/System/Caching/UnsafeNativeMethods.cs

@@ -0,0 +1,59 @@
+// <copyright file="UnsafeNativeMethods.cs" company="Microsoft">
+//   Copyright (c) 2009 Microsoft Corporation.  All rights reserved.
+// </copyright>
+using System;
+using System.Collections;
+using System.Diagnostics.CodeAnalysis;
+using System.IO;
+using System.Runtime.ConstrainedExecution;
+using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
+using System.Security;
+using System.Security.Permissions;
+using System.Text;
+
+namespace System.Runtime.Caching {
+    [SuppressUnmanagedCodeSecurity]
+    [SuppressMessage("Microsoft.Security", "CA2118:ReviewSuppressUnmanagedCodeSecurityUsage", Justification = "Grandfathered suppression from original caching code checkin")]
+    [SecurityCritical]
+    internal static class UnsafeNativeMethods {
+        private const string KERNEL32 = "KERNEL32.DLL";
+        private const string ADVAPI32 = "ADVAPI32.DLL";
+
+        /*
+         * KERNEL32.DLL
+         */
+
+        [SuppressMessage("Microsoft.Security", "CA2118:ReviewSuppressUnmanagedCodeSecurityUsage", Justification = "Grandfathered suppression from original caching code checkin")]
+        [DllImport(KERNEL32, CharSet=CharSet.Unicode)]
+        internal extern static int GetModuleFileName(IntPtr module, StringBuilder filename, int size);
+
+        [SuppressMessage("Microsoft.Security", "CA2118:ReviewSuppressUnmanagedCodeSecurityUsage", Justification = "Grandfathered suppression from original caching code checkin")]
+        [DllImport(KERNEL32, CharSet=CharSet.Unicode)]
+        internal extern static int GlobalMemoryStatusEx(ref MEMORYSTATUSEX memoryStatusEx);
+
+        /*
+         * ADVAPI32.DLL
+         */
+
+        [SuppressMessage("Microsoft.Security", "CA2118:ReviewSuppressUnmanagedCodeSecurityUsage", Justification = "Grandfathered suppression from original caching code checkin")]
+        [DllImport(ADVAPI32), ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
+        internal static extern int RegCloseKey(IntPtr hKey);
+    }
+
+    [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]
+    internal struct MEMORYSTATUSEX {
+        internal int dwLength;
+        internal int dwMemoryLoad;
+        internal long ullTotalPhys;
+        internal long ullAvailPhys;
+        internal long ullTotalPageFile;
+        internal long ullAvailPageFile;
+        internal long ullTotalVirtual;
+        internal long ullAvailVirtual;
+        internal long ullAvailExtendedVirtual;
+        internal  void Init() {
+            dwLength = Marshal.SizeOf(typeof(MEMORYSTATUSEX));
+        }
+    }
+}