SemaphoreAcl.TryOpenExisting(String, SemaphoreRights, Semaphore) Method
Definition
Important
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Tries to open a specified named semaphore, 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::SemaphoreRights rights, [Runtime::InteropServices::Out] System::Threading::Semaphore ^ % result);public static bool TryOpenExisting (string name, System.Security.AccessControl.SemaphoreRights rights, out System.Threading.Semaphore? result);static member TryOpenExisting : string * System.Security.AccessControl.SemaphoreRights * Semaphore -> boolPublic Shared Function TryOpenExisting (name As String, rights As SemaphoreRights, ByRef result As Semaphore) As BooleanParameters
- name
- String
The name of the semaphore to be opened. If it's prefixed by "Global", it refers to a machine-wide semaphore. If it's prefixed by "Local", or doesn't have a prefix, it refers to a session-wide semaphore. Both prefix and name are case-sensitive.
- rights
- SemaphoreRights
The desired access rights to apply to the returned semaphore.
- result
- Semaphore
When this method returns true, contains an object that represents the named semaphore if the call succeeded, or null otherwise. This parameter is treated as uninitialized.
Returns
true if the named semaphore was opened successfully; otherwise, false.
Exceptions
name is null
name is an empty string.
A Win32 error occurred.
The named semaphore exists, but the user does not have the security access required to use it.
