86 lines
2.7 KiB
C#
86 lines
2.7 KiB
C#
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//-----------------------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//-----------------------------------------------------------------------------
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namespace System.ServiceModel.Activation.Interop
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{
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using System;
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using System.Runtime;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using System.Security;
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using System.Text;
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using Microsoft.Win32.SafeHandles;
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#pragma warning disable 618 // have not moved to the v4 security model yet
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[SecurityCritical(SecurityCriticalScope.Everything)]
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#pragma warning restore 618
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sealed class SafeHGlobalHandleCritical : SafeHandleZeroOrMinusOneIsInvalid
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{
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SafeHGlobalHandleCritical()
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: base(true)
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{
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}
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// 0 is an Invalid Handle
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SafeHGlobalHandleCritical(IntPtr handle)
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: base(true)
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{
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Fx.Assert(handle == IntPtr.Zero, "SafeHGlobalHandleCritical constructor can only be called with IntPtr.Zero.");
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SetHandle(handle);
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}
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protected override bool ReleaseHandle()
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{
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Marshal.FreeHGlobal(handle);
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return true;
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}
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public static SafeHGlobalHandleCritical InvalidHandle
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{
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get { return new SafeHGlobalHandleCritical(IntPtr.Zero); }
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}
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public static SafeHGlobalHandleCritical AllocHGlobal(string s)
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{
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byte[] bytes = DiagnosticUtility.Utility.AllocateByteArray(checked((s.Length + 1) * 2));
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Encoding.Unicode.GetBytes(s, 0, s.Length, bytes, 0);
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return AllocHGlobal(bytes);
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}
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public static SafeHGlobalHandleCritical AllocHGlobal(byte[] bytes)
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{
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SafeHGlobalHandleCritical result = AllocHGlobal(bytes.Length);
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Marshal.Copy(bytes, 0, result.DangerousGetHandle(), bytes.Length);
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return result;
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}
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public static SafeHGlobalHandleCritical AllocHGlobal(uint cb)
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{
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// The cast could overflow to minus.
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// Unfortunately, Marshal.AllocHGlobal only takes int.
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return AllocHGlobal((int)cb);
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}
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public static SafeHGlobalHandleCritical AllocHGlobal(int cb)
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{
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if (cb < 0)
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{
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throw FxTrace.Exception.ArgumentOutOfRange("cb", cb, SR.ValueMustBeNonNegative);
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}
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SafeHGlobalHandleCritical result = new SafeHGlobalHandleCritical();
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// CER
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RuntimeHelpers.PrepareConstrainedRegions();
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try { }
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finally
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{
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IntPtr ptr = Marshal.AllocHGlobal(cb);
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result.SetHandle(ptr);
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}
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return result;
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}
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}
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}
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