MutexAcl.TryOpenExisting(String, MutexRights, Mutex) Method

Definition

Namespace:

System.Threading

Assembly:

System.Threading.AccessControl.dll

Package:

System.Threading.AccessControl v9.0.0-rc.2.24473.5

Source:

MutexAcl.cs

Tries to open a specified named mutex, if it already exists, applies the desired access rights, and returns a value that indicates whether the operation succeeded.

public:
 static bool TryOpenExisting(System::String ^ name, System::Security::AccessControl::MutexRights rights, [Runtime::InteropServices::Out] System::Threading::Mutex ^ % result);

public static bool TryOpenExisting (string name, System.Security.AccessControl.MutexRights rights, out System.Threading.Mutex? result);

static member TryOpenExisting : string * System.Security.AccessControl.MutexRights * Mutex -> bool

Public Shared Function TryOpenExisting (name As String, rights As MutexRights, ByRef result As Mutex) As Boolean

Parameters

name

String

The name of the mutex to be opened. If it's prefixed by "Global", it refers to a machine-wide mutex. If it's prefixed by "Local", or doesn't have a prefix, it refers to a session-wide mutex. Both prefix and name are case-sensitive.

rights

MutexRights

The desired access rights to apply to the returned mutex.

result

Mutex

When this method returns true, contains an object that represents the named mutex if the call succeeded, or null otherwise. This parameter is treated as uninitialized.

Returns

Boolean

true if the named mutex was opened successfully; otherwise, false.

Exceptions

ArgumentNullException

name is null

ArgumentException

name is an empty string.

IOException

A Win32 error occurred.

UnauthorizedAccessException

The named mutex exists, but the user does not have the security access required to use it.