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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 was primarily developed for use by Node.js, but it's also used by other projects.
C
Added on 2025年7月6日25,473
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LanguageProject Introduction
Summary
libuv is a high-performance, cross-platform asynchronous I/O library written in C. It provides an event loop and a unified API for various non-blocking operations across different operating systems, making it ideal for building scalable network applications and command-line tools.
Problem Solved
Modern applications often require non-blocking operations to handle many concurrent connections or tasks without freezing the main thread. Traditional synchronous I/O is blocking and inefficient for these scenarios. Building cross-platform asynchronous applications is complex due to varying operating system APIs. libuv abstracts these differences, providing a consistent API for asynchronous I/O.
Core Features
Cross-Platform Asynchronous I/O
Provides an event loop and evented I/O across different operating systems (Linux, macOS, Windows, etc.).
Diverse Asynchronous Operations
Supports various asynchronous operations like file system operations, networking (TCP/UDP), DNS lookups, and child processes.
Utility Functions
Includes utilities for timers, threading, and inter-process communication (IPC).
Tech Stack
C
Platform-specific APIs (epoll, kqueue, IOCP)
Use Cases
libuv is a core component in various projects and is suitable for applications requiring efficient, non-blocking operations:
Foundation for Runtimes (e.g., Node.js)
Details
The core of the Node.js runtime relies on libuv's event loop and I/O abstractions to handle non-blocking operations, enabling its high concurrency model.
User Value
Provides the essential asynchronous capabilities that enable runtimes to handle vast numbers of concurrent connections efficiently.
Building Scalable Network Servers
Details
Developers building high-performance HTTP servers, proxies, or other network services in C/C++ can use libuv for scalable, event-driven architecture.
User Value
Simplifies the development of high-throughput network applications by providing a consistent, non-blocking I/O layer across platforms.
Asynchronous Command-Line Tools
Details
Creating command-line tools that need to perform non-blocking file operations, network requests, or run child processes asynchronously.
User Value
Enables interactive and responsive CLI tools that don't block while waiting for I/O operations to complete.
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