Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/SafeNativeMethods.cs

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+//------------------------------------------------------------------------------
+// <copyright file="SafeNativeMethods.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Web {
+    using System.Runtime.InteropServices;
+    using System;
+    using System.Security.Permissions;
+    using System.Collections;
+    using System.IO;
+    using System.Text;
+
+    [
+    System.Runtime.InteropServices.ComVisible(false), 
+    System.Security.SuppressUnmanagedCodeSecurityAttribute()
+    ]
+    internal sealed class SafeNativeMethods {
+        
+        private SafeNativeMethods() {}
+
+        [DllImport(ModName.KERNEL32_FULL_NAME)]
+        internal /*public*/ extern static int GetCurrentProcessId();
+
+        [DllImport(ModName.KERNEL32_FULL_NAME)]
+        internal /*public*/ extern static int GetCurrentThreadId();
+
+        [DllImport(ModName.KERNEL32_FULL_NAME)]
+        internal static extern bool QueryPerformanceCounter( [System.Runtime.InteropServices.Out, In] ref long lpPerformanceCount);
+
+        [DllImport(ModName.KERNEL32_FULL_NAME)]
+        internal static extern bool QueryPerformanceFrequency( [System.Runtime.InteropServices.Out, In] ref long lpFrequency);                     
+
+// required for HttpDebugHandlerTimeLog
+#if PERF
+        [DllImport(ModName.KERNEL32_FULL_NAME, CharSet=CharSet.Unicode)]
+        internal static extern void OutputDebugString(String message);
+#endif
+    }
+}