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Concurrency is the study and practice of executing multiple computations in overlapping time periods, including threads, processes and asynchronous tasks. It covers synchronization, coordination, and hazards like race conditions and deadlocks. The goal is to ensure correctness and performance when resources are accessed concurrently across components and sys…
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Concurrency lets multiple overlapping activities use a system’s resources and state.
The topic grew from the need to handle many tasks and I/O efficiently. Operating systems, POSIX threads, and runtimes developed different synchronization mechanisms.
Ask which activities may overlap, what state they share, and which order is valid; this exposes races and deadlocks.
Multiple activities read or change it and need an access protocol.
It bounds valid results despite overlapping execution.
It improves responsiveness and throughput but requires explicit access and lifetime rules.
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