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XCB (X protocol C-language Binding) is a library implementing the client-side of the X11 display server protocol. XCB is written in the C programming language and distributed under the MIT License. The project was started in 2001 by Bart Massey and aims to replace Xlib. ==Overview== XCB was designed as a smaller, modernized replacement for Xlib, previously the primary C library for communicating with the X window system, coinciding with a more complete overhaul of the X implementation that took place during the early 2000s. The main goals of XCB are to * Reduce library size and complexity; * Provide direct access to the X11 protocol. The required size reduction is achieved primarily by restricting XCB's scope to handling the X protocol and omitting Xlib functionality such as its extensive utility library, much of which saw little use by applications. This results in a factor thirty reduction of the compiled library size (as of 2004). Secondary goals include making the C interface asynchronous, facilitating better multithreading and making it easier to implement extensions (via XML protocol descriptions). The core and extension protocol descriptions are in XML, with a program written in Python creating the C bindings. (Previous versions used XSLT and M4.) A further goal is to be able to use these protocol descriptions to create protocol documentation, more language bindings, and server-side stubs. Massey and others have worked to prove key portions of XCB formally correct using Z notation.〔Massey and Bauer, 2002.〕 (Xlib has long been known to contain errors.〔Sharp and Massey, 2002, §2.4. "While Xlib was designed to support threaded applications, and while that support is not unusable, there are known race conditions that cannot be eliminated without changing the Xlib interface."〕) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「XCB」の詳細全文を読む スポンサード リンク
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