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== Concurrent Programming == [[File:Elixir_logo.png|right|Elixir logo|150px]] Concurrent programming is a programming paradigm that allows multiple tasks, or processes, to execute simultaneously. Elixir, a functional programming language built on the Erlang virtual machine (BEAM), provides powerful abstractions and features for concurrent programming. === Processes === In Elixir, concurrency is achieved through lightweight, isolated units of execution called **processes**. Elixir processes are not operating system processes but rather Erlang processes. They are extremely lightweight, allowing for the creation of thousands or even millions of concurrent processes on a single machine. === Concurrency with Processes === Elixir processes communicate with each other through **message passing**, allowing for the development of highly concurrent, fault-tolerant systems. Message passing is achieved using the `send` and `receive` functions. === Concurrency with Tasks === Elixir provides the `Task` module to handle concurrent tasks. Tasks are higher-level abstractions built on top of processes, making it easier to work with concurrent computations. The `Task` module offers functions for spawning, waiting for, and cancelling tasks. === Concurrency with Agents === Concurrency can also be achieved using **agents** in Elixir. Agents provide a shared state that can be safely updated by multiple processes. Agents are implemented using processes and offer functions for reading and modifying their state. === Concurrency with GenServer === Elixir includes the **GenServer** behavior, which can be used to build concurrent servers that maintain state and respond to messages. GenServers encapsulate the common patterns of a concurrent server, such as starting, stopping, handling requests, and managing state. === Concurrency Control === Elixir provides mechanisms for controlling concurrency and preventing race conditions. These mechanisms include the use of locks, semaphores, and other synchronization primitives. These tools allow developers to handle shared resources and coordinate access to them. === Error Handling and Fault Tolerance === Elixir's concurrency model is designed with fault tolerance in mind. Processes in Elixir can monitor each other for failure, and supervisors can automatically restart failed processes, ensuring the overall stability and reliability of a concurrent application. === Concurrency Considerations === When developing concurrent applications in Elixir, it is essential to consider factors such as message passing overhead, load balancing, and avoiding bottlenecks. Elixir provides tools and libraries to aid in these considerations, including the **OTP** framework, which offers a wide range of abstractions and patterns for building concurrent and distributed systems. == See Also == * [[Elixir Programming Language]] * [[Erlang Programming Language]] * [[Actor Model]] * [[Concurrent Computing]] * [[Distributed Systems]] == References == {{Reflist}} [[Category:Elixir programming language]] [[Category:Concurrency]] [[Category:Programming paradigms]]
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