~ What ? ~
Atomic operations, also known as atomic instructions or atomic primitives, are low-level operations provided by computer hardware or programming libraries that are guaranteed to execute indivisibly and without interference from other concurrent operations.
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- Atomicity - Atomic operations are either fully completed or not executed at all. There is no intermediate or partial state.
- Indivisibility - An atomic operation is performed as a single, indivisible step. It cannot be interrupted by other operations.
- Visibility - The effects of an atomic operation are immediately visible to other threads or processes.
- Mutual Exclusion - Atomic operations ensure that only one thread or process can perform the operation at a given time. This is to prevent Race Condition and maintain Consistency.
- Synchronization - Atomic operations serve as synchronization points, enforcing a specific order of execution and ensuring the proper sequencing of operations.
- Guaranteed Execution - Atomic operations are designed to have guaranteed execution, regardless of the presence of concurrent operations. They ensure no interruptions.
- Thread Safety - Atomic operations can be safely used in a multi-threaded environment.
- Low-Level Operations - Atomic operations often correspond to low-level hardware instructions or primitives provided by the underlying architecture or programming language.