1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
//
// Safe wrapper for a string and its UTF8 encoding
//
// Authors:
// Aleksey Kliger <aleksey@xamarin.com>
// Rodrigo Kumpera <kumpera@xamarin.com>
//
// Copyright 2016 Dot net foundation.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
//
using System;
using System.Runtime.CompilerServices;
namespace Mono {
internal struct SafeStringMarshal : IDisposable {
readonly string str;
IntPtr marshaled_string;
[MethodImplAttribute(MethodImplOptions.InternalCall)]
public extern static IntPtr StringToUtf8 (string str);
[MethodImplAttribute(MethodImplOptions.InternalCall)]
public extern static void GFree (IntPtr ptr);
public SafeStringMarshal (string str) {
this.str = str;
this.marshaled_string = IntPtr.Zero;
}
public IntPtr Value {
get {
if (marshaled_string == IntPtr.Zero && str != null)
marshaled_string = StringToUtf8 (str);
return marshaled_string;
}
}
public void Dispose () {
if (marshaled_string != IntPtr.Zero) {
GFree (marshaled_string);
marshaled_string = IntPtr.Zero;
}
}
}
}
|
