NamedSemaphore Class

public class NamedSemaphore : WaitHandle

Public Class NamedSemaphore
	Inherits WaitHandle

public ref class NamedSemaphore : public WaitHandle

Gemstone.Threading.NamedSemaphore = function();

Type.createClass(
	'Gemstone.Threading.NamedSemaphore',
	WaitHandle);

Inheritance

Object    MarshalByRefObject    WaitHandle    NamedSemaphore

A NamedSemaphore is a synchronization object that can be utilized across multiple processes.

On POSIX systems, the NamedSemaphore exhibits kernel persistence, meaning instances will remain active beyond the lifespan of the creating process. Named semaphores must be explicitly removed by invoking Unlink when they are no longer needed. Kernel persistence necessitates careful design consideration regarding the responsibility for invoking Unlink. Since the common use case for named semaphores is across multiple applications, it is advisable for the last exiting process to handle the cleanup. In cases where an application may crash before calling Unlink, the semaphore persists in the system, potentially leading to resource leakage. Implementations should include strategies to address and mitigate this risk.

Reference