Contents
Which is better, a blocking queue or a concurrent queue?
The correct choice of a concurrent queue could be crucial in achieving good performance in our algorithms. Firstly, we’ll see some important differences between a blocking queue and a non-blocking one. Then, we’ll take a look at some implementations and best practices.
How to use concurrentqueue < T > in collections?
The type of the elements contained in the queue. The following example shows how to use a ConcurrentQueue to enqueue and dequeue items:
How to pop an element from concurrent queue?
Concurrent access from multiple writer and reader threads At least one means to pop an element from queue satisfying the strong exception guarantee Performance: minimize lock contention, polling. In terms of the implementation, there are three key issues to consider: Only one thread can be pushing an element at any given time
Why is the condition variable important in concurrent queue?
The mutex prevents concurrent reads and writes, and the condition variable allows consuming threads to wait for elements to be available in the queue without excessive mutex contention and without using expensive and inefficient polling. The core of our pop () methods looks like this:
How does the non-blocking queue work in Java?
In those cases, the non-blocking queue will either throw an exception or return a special value, like null or false. To achieve this blocking mechanism, the BlockingQueue interface exposes two functions on top of the normal Queue functions: put and take. Those functions are the equivalent of add and remove in a standard Queue.
How is BlockingQueue a thread-safe mechanism in Java?
BlockingQueue offers a simple thread-safe mechanism. In this queue, threads need to wait for the queue’s availability. The producers will wait for available capacity before adding elements, while consumers will wait until the queue is empty.
Is the synchronousqueue always one item in a queue?
While queues typically contain many items, the SynchronousQueue will always have, at most, a single item. In other words, we need to see the SynchronousQueue as a simple way to exchange some data between two threads.