mutex

C++ Core Guidelines: Sharing Data between Threads

If you want to have fun with threads, you should share mutable data between them. In order to get no data race and, therefore, undefined behaviour, you have to think about the synchronisation of your threads.

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Tags: lock, mutex
Views: 71847

Thread-Safe Initialization of a Singleton

There are a lot of issues with the singleton pattern. I'm totally aware of that. But the singleton pattern is an ideal use case for a variable, which has only to be initialized in a thread-safe way. From that point on you can use it without synchronization. So in this post, I discuss different ways to initialize a singleton in a multithreading environment. You get the performance numbers and can reason about your uses cases for the thread-safe initialization of a variable.

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Views: 262691

Prefer Locks to Mutexes

If the previous post showed something, it's, that you should use mutexes with great care. That's why you should wrap them in a lock.

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Tags: lock, mutex
Views: 117203

The Risks of Mutexes

Usage of mutexes seems extremely simple. There is a critical section in the code, which can only be accessed by a single thread at any point of time. It's ensured by a mutex m. The calls m.lock() and m.unlock() guarantee this exclusivity. But, the devil is in the details.

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Tags: mutex
Views: 23963

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