How to Safely and Reliably Use Global Mutexes in C#?

C# Question:

The use of Mutex (Mutex) may be tricky, especially for global mutual locks. What are the reliable and secure models created and used in C#?

Answer:

<.> 1. Use the unique identifier:

Create a global mutually locking unique identifier with the application of the application. This ensures that mutual locks are specific to your application and will not conflict with other applications. <.> 2. Create and release correctly:

Use the Construction function (where

is set to ) instantiated and mutually exclusive lock. This ensures that it is created if the mutual lock does not exist, or it is obtained if it exists. After completion, be sure to use to release mutual locks.

<.> 3. Processing the mutually exclusive lock:

Mutex(bool, string, out bool) createdNew The is called in true block to capture ReleaseMutex(). This abnormalities occur when the previous process of holding the mutual lock is not released. In this case, this exception can be ignored and can still be obtained.

<.> 4. Set security permissions (multi -user settings):

If multiple users will access the application, use

to set the secure settings of mutually locking. Give the corresponding permissions to the user group or specific users. WaitOne() try/catch <.> 5. Timeout: AbandonedMutexException

Don't wait indefinitely, please consider setting the timeout for . If you cannot obtain a mutual lock, this will prevent the program from hanging out indefinitely.

Code example:

MutexSecurity

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