tryenqueuetrydequeue
tryenqueuetrydequeue is a term used to describe non-blocking queue operations that attempt to add or remove items without blocking a thread. These operations are commonly found in concurrent or lock-free queue implementations and are designed to indicate success or failure without throwing exceptions or causing a thread to wait.
TryEnqueue and TryDequeue semantics
- TryEnqueue attempts to insert an item into the queue. It returns true if the item was enqueued
- TryDequeue attempts to remove and return an item from the queue. It returns true if an item
- Both operations are typically non-blocking and may fail spuriously under contention, unlike blocking variants that wait
Usage and design considerations
- These operations are common in bounded, lock-free, or wait-free queue implementations used in producer-consumer scenarios.
- They rely on atomic primitives and memory synchronization to ensure correctness in multi-threaded environments.
- Performance characteristics depend on hardware, memory ordering, and queue design; they offer low-latency interactions at the
- They do not guarantee fairness or ordering across all producers or consumers.
Common patterns and terminology
- In some libraries, similar behavior is offered under names like TryAdd/TryTake or TryEnqueue/TryDequeue. The core idea
- They are typically contrasted with blocking enqueue/dequeue operations or with operations that throw exceptions on failure.
- Non-blocking queues, lock-free data structures, wait-free algorithms
- Blocking queue, blocking collection, TryPeek, TryRemove
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