[WEBINAR] Application Acceleration: Faster Performance for End Users


Definition - What does Mutex mean?

Mutex, in C#, is a class defined in the .NET framework class library that can be used to prevent the simultaneous execution of a block of code by multiple threads that are running in a single or multiple processes.

Mutex is used as a synchronization primitive in situations where a resource has to be shared by multiple threads simultaneously. Named mutex objects are used for inter-process synchronization because multiple applications can access the same mutex object.

The mutex class is designed to protect a shared resource like memory, file handle or network connection from simultaneous access by multiple threads or processes. It is used in lock statement to provide serialized access to resources and ensures mutual exclusion inside the critical sections of code. It helps prevent the unpredictable data corruption that can arise if there is no synchronization. It is often used to check for a single instance of an application at a time.

Mutex is an abbreviated form of mutually exclusive.

Techopedia explains Mutex

Mutex provides multiple threads with access to a shared resource such that the second thread that needs to acquire a mutex that has already been acquired by another thread has to wait until the instant when the first thread releases the mutex. Care should be taken to ensure that a thread does not attempt to acquire a mutex that it already holds, as this can result in a deadlock.

For example, a mutex can be used to provide exclusive access to a file that has to be read or modified in a multithreaded environment.

Mutex class has a constructor that can be used to specify key parameters of a new mutex object during its initialization, such as name, ownership information and the access control security to be applied to the named mutex.

While lock statements can be used to synchronize threads within a single process, mutex is used across process boundaries.

Since mutex class is a wrapper to a Win32 construct, it requires interop transitions that result in a hit to performance. As such, it is not a good choice unless it is required for reasons like synchronization across process boundaries.
This definition was written in the context of C#

Techopedia Deals

Connect with us

Techopedia on Linkedin
Techopedia on Linkedin
"Techopedia" on Twitter

Sign up for Techopedia's Free Newsletter!

Email Newsletter

Join thousands of others with our weekly newsletter

Free Whitepaper: The Path to Hybrid Cloud
Free Whitepaper: The Path to Hybrid Cloud:
The Path to Hybrid Cloud: Intelligent Bursting To Amazon Web Services & Microsoft Azure
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.