SafeHGlobalHandleCritical.cs source code in C# .NET

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                         / 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / System.ServiceModel.Activation / System / ServiceModel / Activation / Interop / SafeHGlobalHandleCritical.cs / 1305376 / SafeHGlobalHandleCritical.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------

namespace System.ServiceModel.Activation.Interop 
{
    using System; 
    using System.Runtime; 
    using System.Runtime.CompilerServices;
    using System.Runtime.InteropServices; 
    using System.Security;
    using System.Text;
    using Microsoft.Win32.SafeHandles;
 
#pragma warning disable 618 // have not moved to the v4 security model yet
    [SecurityCritical(SecurityCriticalScope.Everything)] 
#pragma warning restore 618 
    sealed class SafeHGlobalHandleCritical : SafeHandleZeroOrMinusOneIsInvalid
    { 
        SafeHGlobalHandleCritical()
            : base(true)
        {
        } 

        // 0 is an Invalid Handle 
        SafeHGlobalHandleCritical(IntPtr handle) 
            : base(true)
        { 
            Fx.Assert(handle == IntPtr.Zero, "SafeHGlobalHandleCritical constructor can only be called with IntPtr.Zero.");
            SetHandle(handle);
        }
 
        protected override bool ReleaseHandle()
        { 
            Marshal.FreeHGlobal(handle); 
            return true;
        } 

        public static SafeHGlobalHandleCritical InvalidHandle
        {
            get { return new SafeHGlobalHandleCritical(IntPtr.Zero); } 
        }
 
        public static SafeHGlobalHandleCritical AllocHGlobal(string s) 
        {
            byte[] bytes = DiagnosticUtility.Utility.AllocateByteArray(checked((s.Length + 1) * 2)); 
            Encoding.Unicode.GetBytes(s, 0, s.Length, bytes, 0);
            return AllocHGlobal(bytes);
        }
 
        public static SafeHGlobalHandleCritical AllocHGlobal(byte[] bytes)
        { 
            SafeHGlobalHandleCritical result = AllocHGlobal(bytes.Length); 
            Marshal.Copy(bytes, 0, result.DangerousGetHandle(), bytes.Length);
            return result; 
        }

        public static SafeHGlobalHandleCritical AllocHGlobal(uint cb)
        { 
            // The cast could overflow to minus.
            // Unfortunately, Marshal.AllocHGlobal only takes int. 
            return AllocHGlobal((int)cb); 
        }
 
        public static SafeHGlobalHandleCritical AllocHGlobal(int cb)
        {
            if (cb < 0)
            { 
                throw FxTrace.Exception.ArgumentOutOfRange("cb", cb, SR.ValueMustBeNonNegative);
            } 
 
            SafeHGlobalHandleCritical result = new SafeHGlobalHandleCritical();
 
            // CER
            RuntimeHelpers.PrepareConstrainedRegions();
            try { }
            finally 
            {
                IntPtr ptr = Marshal.AllocHGlobal(cb); 
                result.SetHandle(ptr); 
            }
            return result; 
        }
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------

namespace System.ServiceModel.Activation.Interop 
{
    using System; 
    using System.Runtime; 
    using System.Runtime.CompilerServices;
    using System.Runtime.InteropServices; 
    using System.Security;
    using System.Text;
    using Microsoft.Win32.SafeHandles;
 
#pragma warning disable 618 // have not moved to the v4 security model yet
    [SecurityCritical(SecurityCriticalScope.Everything)] 
#pragma warning restore 618 
    sealed class SafeHGlobalHandleCritical : SafeHandleZeroOrMinusOneIsInvalid
    { 
        SafeHGlobalHandleCritical()
            : base(true)
        {
        } 

        // 0 is an Invalid Handle 
        SafeHGlobalHandleCritical(IntPtr handle) 
            : base(true)
        { 
            Fx.Assert(handle == IntPtr.Zero, "SafeHGlobalHandleCritical constructor can only be called with IntPtr.Zero.");
            SetHandle(handle);
        }
 
        protected override bool ReleaseHandle()
        { 
            Marshal.FreeHGlobal(handle); 
            return true;
        } 

        public static SafeHGlobalHandleCritical InvalidHandle
        {
            get { return new SafeHGlobalHandleCritical(IntPtr.Zero); } 
        }
 
        public static SafeHGlobalHandleCritical AllocHGlobal(string s) 
        {
            byte[] bytes = DiagnosticUtility.Utility.AllocateByteArray(checked((s.Length + 1) * 2)); 
            Encoding.Unicode.GetBytes(s, 0, s.Length, bytes, 0);
            return AllocHGlobal(bytes);
        }
 
        public static SafeHGlobalHandleCritical AllocHGlobal(byte[] bytes)
        { 
            SafeHGlobalHandleCritical result = AllocHGlobal(bytes.Length); 
            Marshal.Copy(bytes, 0, result.DangerousGetHandle(), bytes.Length);
            return result; 
        }

        public static SafeHGlobalHandleCritical AllocHGlobal(uint cb)
        { 
            // The cast could overflow to minus.
            // Unfortunately, Marshal.AllocHGlobal only takes int. 
            return AllocHGlobal((int)cb); 
        }
 
        public static SafeHGlobalHandleCritical AllocHGlobal(int cb)
        {
            if (cb < 0)
            { 
                throw FxTrace.Exception.ArgumentOutOfRange("cb", cb, SR.ValueMustBeNonNegative);
            } 
 
            SafeHGlobalHandleCritical result = new SafeHGlobalHandleCritical();
 
            // CER
            RuntimeHelpers.PrepareConstrainedRegions();
            try { }
            finally 
            {
                IntPtr ptr = Marshal.AllocHGlobal(cb); 
                result.SetHandle(ptr); 
            }
            return result; 
        }
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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SafeHGlobalHandleCritical.cs source code in C# .NET

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