47 lines
1.1 KiB
C#
47 lines
1.1 KiB
C#
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//
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// Safe wrapper for a string and its UTF8 encoding
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//
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// Authors:
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// Aleksey Kliger <aleksey@xamarin.com>
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// Rodrigo Kumpera <kumpera@xamarin.com>
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//
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// Copyright 2016 Dot net foundation.
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// Licensed under the MIT license. See LICENSE file in the project root for full license information.
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//
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using System;
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using System.Runtime.CompilerServices;
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namespace Mono {
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internal struct SafeStringMarshal : IDisposable {
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readonly string str;
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IntPtr marshaled_string;
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[MethodImplAttribute(MethodImplOptions.InternalCall)]
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public extern static IntPtr StringToUtf8 (string str);
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[MethodImplAttribute(MethodImplOptions.InternalCall)]
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public extern static void GFree (IntPtr ptr);
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public SafeStringMarshal (string str) {
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this.str = str;
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this.marshaled_string = IntPtr.Zero;
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}
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public IntPtr Value {
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get {
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if (marshaled_string == IntPtr.Zero && str != null)
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marshaled_string = StringToUtf8 (str);
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return marshaled_string;
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}
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}
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public void Dispose () {
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if (marshaled_string != IntPtr.Zero) {
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GFree (marshaled_string);
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marshaled_string = IntPtr.Zero;
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}
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}
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}
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}
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