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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#nullable enable
using System.IO;
using Microsoft.Win32;
using Microsoft.Win32.SafeHandles;
using System.Runtime.InteropServices;
using System.Diagnostics;
namespace System.Threading
{
/// <summary>
/// Synchronization primitive that can also be used for interprocess synchronization
/// </summary>
public sealed partial class Mutex : WaitHandle
{
public Mutex(bool initiallyOwned, string? name, out bool createdNew)
{
CreateMutexCore(initiallyOwned, name, out createdNew);
}
public Mutex(bool initiallyOwned, string? name)
{
CreateMutexCore(initiallyOwned, name, out _);
}
public Mutex(bool initiallyOwned)
{
CreateMutexCore(initiallyOwned, null, out _);
}
public Mutex()
{
CreateMutexCore(false, null, out _);
}
private Mutex(SafeWaitHandle handle)
{
SafeWaitHandle = handle;
}
public static Mutex OpenExisting(string name)
{
switch (OpenExistingWorker(name, out Mutex? result))
{
case OpenExistingResult.NameNotFound:
throw new WaitHandleCannotBeOpenedException();
case OpenExistingResult.NameInvalid:
throw new WaitHandleCannotBeOpenedException(SR.Format(SR.Threading_WaitHandleCannotBeOpenedException_InvalidHandle, name));
case OpenExistingResult.PathNotFound:
throw new DirectoryNotFoundException(SR.Format(SR.IO_PathNotFound_Path, name));
default:
Debug.Assert(result != null, "result should be non-null on success");
return result;
}
}
public static bool TryOpenExisting(string name, out Mutex? result) => // TODO-NULLABLE: Try pattern with non-null result when true
OpenExistingWorker(name, out result) == OpenExistingResult.Success;
}
}
|
