Difference between Mutex and singleton

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Hi All,

Could you please explain me the difference between a Mutex and a Single ton with a small example.

My understanding is we can create only one instance(object) of a class in singleton class.

And in Mutex is useful to have locking control over an object in two different process.

Please let me know in detail with a small example in C++ for Mutex and singleton.

I want to have only one instance of application running at any time .

Appreciate your help.

Thanks,
Sudhakar

Posted 24-Mar-14 0:54am

Member 3975629

Updated 24-Mar-14 0:55am

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nv3 · Answer 1 · 2014-03-24T03:58:00

Both things have nothing to do with each other.

A singleton is a design pattern that is used whenever you want to guarantee that only one object of a class exists. Example: A class that manages all devices in your system and which assumes that only one such manager may exist within your program. Singletons are considered within the context of a process, i.e. only one object of the class may be created within a process. And hence, a singleton cannot be used for the purpose you described.

A mutex is a system object that can be used to regulate that access to a resource by multiple processes or threads. Example: Multiple processes might us a mutex to coordinate their access to a shared file. A mutex can be accessed by multiple processes to do this kind of coordination. It is the usual tool that is utilized for the purpose you describe.

Mehdi Gholam · Answer 2 · 2014-03-24T03:23:00

Solution 1

Read this : http://stackoverflow.com/questions/4989451/mutex-example-tutorial[^]

Posted 24-Mar-14 3:23am

Mehdi Gholam

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Member 3975629 24-Mar-14 9:31am

Thanks for the link on mutex. but how singleton is different from Mutex. I mean functionality wise singleton also allows only one instance of the class.

Thanks,
Sudhakar

Mehdi Gholam 24-Mar-14 9:37am

The link above gives a good analogy.