mutex

The Null Object Pattern

A Null Object encapsulates a do nothing behavior inside an object. It is often pretty comfortable to use a neutral object.

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Tags: lock, mutex
Views: 6665

Dining Philosophers Problem II

In the last post "Dining Philosophers Problem I", Andre Adrian started his analysis of the classical dining philosophers' problem. Today, he uses atomics, mutexes, and locks.

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Views: 5840

C++ Core Guidelines: Sharing Data between Threads

If you want to have fun with threads, you should share mutable data between them. To get no data race and, therefore, undefined behavior, you have to think about the synchronization of your threads.

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Tags: lock, mutex
Views: 106398

Thread-Safe Initialization of a Singleton

There are a lot of issues with the singleton pattern. I'm aware of that. But the singleton pattern is an ideal use case for a variable, which can only 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 use cases for the thread-safe initialization of a variable.

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Views: 365476

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: 153459

The Risks of Mutexes

The usage of mutexes seems extremely simple. There is a critical section in the code that a single thread can only access at any point in 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: 37954

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