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Libuv: Cross-platform Asynchronous I/O Library
Libuv is a multi-platform support library with a focus on asynchronous I/O. It provides an event loop, timers, and various asynchronous utilities.
C
Added on 2025年6月15日25,387
Stars3,702
ForksC
LanguageProject Introduction
Summary
Libuv is a high-performance, cross-platform asynchronous I/O library written in C, designed to provide a stable and efficient foundation for building modern, non-blocking applications that require interaction with the operating system's event loop.
Problem Solved
Developing applications that need to handle many simultaneous connections or perform I/O operations without blocking the main thread is complex and platform-dependent. Libuv abstracts away these complexities, offering a consistent API across different operating systems like Windows, macOS, and Linux.
Core Features
Full-featured Event Loop
Provides a central mechanism for managing multiple asynchronous operations efficiently, based on common OS kernel notification methods.
Asynchronous Networking (TCP & UDP)
Support for non-blocking TCP and UDP sockets, enabling high-concurrency network applications without thread blocking.
Asynchronous File System Operations
Offers asynchronous file I/O operations, preventing application freezes during heavy disk access by offloading work to a thread pool.
Timers, Signals, and Child Processes
Provides timers and handling of asynchronous signals and child processes.
Tech Stack
C
Use Cases
Libuv is primarily used as a foundational library by projects requiring high-performance, non-blocking I/O across various platforms. Common applications and projects include:
Building Language Runtimes (e.g., Node.js)
Details
Node.js, the popular JavaScript runtime, heavily relies on Libuv to provide its non-blocking I/O capabilities, timers, and process management, enabling high-concurrency server-side JavaScript applications.
User Value
Underpins the performance, scalability, and cross-platform compatibility of many modern language runtimes and frameworks.
Developing High-Performance Network Servers/Proxies
Details
Authors of network proxies, load balancers, custom servers, or other network infrastructure components can use Libuv for efficient handling of many concurrent connections with low overhead.
User Value
Enables building scalable network infrastructure components with lower resource consumption and higher throughput compared to traditional blocking models.
Asynchronous Utilities and Applications
Details
Creating command-line utilities or desktop applications that perform background network requests or file operations asynchronously without freezing the user interface.
User Value
Provides a responsive user experience even during lengthy or numerous I/O operations by leveraging the event loop.
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