MutexRights Enumeration
This enumeration has a FlagsAttribute attribute that allows a bitwise combination of its member values.
Namespace: System.Security.AccessControlAssembly: mscorlib (in mscorlib.dll)
| Member name | Description | |
|---|---|---|
| ChangePermissions | The right to change the security and audit rules associated with a named mutex. | |
| Delete | The right to delete a named mutex. | |
| FullControl | The right to exert full control over a named mutex, and to modify its access rules and audit rules. | |
| Modify | The right to release a named mutex. | |
| ReadPermissions | The right to open and copy the access rules and audit rules for a named mutex. | |
| Synchronize | The right to wait on a named mutex. | |
| TakeOwnership | The right to change the owner of a named mutex. |
Use the MutexRights enumeration to specify access control rights when you create MutexSecurity objects. To apply access rights to a named system mutex, use MutexSecurity objects with the Mutex constructor and the Mutex.SetAccessControl method.
The following code example demonstrates the use of MutexRights values when creating and using MutexAccessRule objects. The example creates an MutexSecurity object, adds rules that allow and deny various rights for the current user, and displays the resulting pair of rules. The example then allows new rights for the current user and displays the result, showing that the new rights are merged with the existing AccessControlType.Allow rule.
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| This example does not attach the security object to a Mutex object; see MutexSecurity, Mutex.GetAccessControl method, and Mutex.SetAccessControl. |
Imports System Imports System.Threading Imports System.Security.AccessControl Imports System.Security.Principal Public Class Example Public Shared Sub Main() ' Create a string representing the current user. Dim user As String = Environment.UserDomainName _ & "\" & Environment.UserName ' Create a security object that grants no access. Dim mSec As New MutexSecurity() ' Add a rule that grants the current user the ' right to enter or release the mutex. Dim rule As New MutexAccessRule(user, _ MutexRights.Synchronize _ Or MutexRights.Modify, _ AccessControlType.Allow) mSec.AddAccessRule(rule) ' Add a rule that denies the current user the ' right to change permissions on the mutex. rule = New MutexAccessRule(user, _ MutexRights.ChangePermissions, _ AccessControlType.Deny) mSec.AddAccessRule(rule) ' Display the rules in the security object. ShowSecurity(mSec) ' Add a rule that allows the current user the ' right to read permissions on the mutex. This rule ' is merged with the existing Allow rule. rule = New MutexAccessRule(user, _ MutexRights.ReadPermissions, _ AccessControlType.Allow) mSec.AddAccessRule(rule) ShowSecurity(mSec) End Sub Private Shared Sub ShowSecurity(ByVal security As MutexSecurity) Console.WriteLine(vbCrLf & "Current access rules:" & vbCrLf) For Each ar As MutexAccessRule In _ security.GetAccessRules(True, True, GetType(NTAccount)) Console.WriteLine(" User: {0}", ar.IdentityReference) Console.WriteLine(" Type: {0}", ar.AccessControlType) Console.WriteLine(" Rights: {0}", ar.MutexRights) Console.WriteLine() Next End Sub End Class 'This code example produces output similar to following: ' 'Current access rules: ' ' User: TestDomain\TestUser ' Type: Deny ' Rights: ChangePermissions ' ' User: TestDomain\TestUser ' Type: Allow ' Rights: Modify, Synchronize ' ' 'Current access rules: ' ' User: TestDomain\TestUser ' Type: Deny ' Rights: ChangePermissions ' ' User: TestDomain\TestUser ' Type: Allow ' Rights: Modify, ReadPermissions, Synchronize
Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
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