138 lines
6.7 KiB
HTML
138 lines
6.7 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<!-- Copyright (C) 1988-2016 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Funding Free Software", the Front-Cover
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(see below). A copy of the license is included in the section entitled
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"GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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You have freedom to copy and modify this GNU Manual, like GNU
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<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Using the GNU Compiler Collection (GCC): Modern GNU Objective-C runtime API</title>
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<meta name="description" content="Using the GNU Compiler Collection (GCC): Modern GNU Objective-C runtime API">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="GNU-Objective_002dC-runtime-API.html#GNU-Objective_002dC-runtime-API" rel="up" title="GNU Objective-C runtime API">
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<link href="Traditional-GNU-Objective_002dC-runtime-API.html#Traditional-GNU-Objective_002dC-runtime-API" rel="next" title="Traditional GNU Objective-C runtime API">
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="Modern-GNU-Objective_002dC-runtime-API"></a>
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<div class="header">
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<p>
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Next: <a href="Traditional-GNU-Objective_002dC-runtime-API.html#Traditional-GNU-Objective_002dC-runtime-API" accesskey="n" rel="next">Traditional GNU Objective-C runtime API</a>, Up: <a href="GNU-Objective_002dC-runtime-API.html#GNU-Objective_002dC-runtime-API" accesskey="u" rel="up">GNU Objective-C runtime API</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Modern-GNU-Objective_002dC-Runtime-API"></a>
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<h4 class="subsection">8.1.1 Modern GNU Objective-C Runtime API</h4>
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<p>The GNU Objective-C runtime provides an API which is similar to the
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one provided by the “Objective-C 2.0” Apple/NeXT Objective-C
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runtime. The API is documented in the public header files of the GNU
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Objective-C runtime:
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</p>
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<ul>
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<li> <samp>objc/objc.h</samp>: this is the basic Objective-C header file,
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defining the basic Objective-C types such as <code>id</code>, <code>Class</code>
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and <code>BOOL</code>. You have to include this header to do almost
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anything with Objective-C.
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</li><li> <samp>objc/runtime.h</samp>: this header declares most of the public runtime
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API functions allowing you to inspect and manipulate the Objective-C
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runtime data structures. These functions are fairly standardized
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across Objective-C runtimes and are almost identical to the Apple/NeXT
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Objective-C runtime ones. It does not declare functions in some
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specialized areas (constructing and forwarding message invocations,
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threading) which are in the other headers below. You have to include
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<samp>objc/objc.h</samp> and <samp>objc/runtime.h</samp> to use any of the
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functions, such as <code>class_getName()</code>, declared in
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<samp>objc/runtime.h</samp>.
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</li><li> <samp>objc/message.h</samp>: this header declares public functions used to
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construct, deconstruct and forward message invocations. Because
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messaging is done in quite a different way on different runtimes,
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functions in this header are specific to the GNU Objective-C runtime
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implementation.
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</li><li> <samp>objc/objc-exception.h</samp>: this header declares some public
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functions related to Objective-C exceptions. For example functions in
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this header allow you to throw an Objective-C exception from plain
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C/C++ code.
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</li><li> <samp>objc/objc-sync.h</samp>: this header declares some public functions
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related to the Objective-C <code>@synchronized()</code> syntax, allowing
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you to emulate an Objective-C <code>@synchronized()</code> block in plain
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C/C++ code.
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</li><li> <samp>objc/thr.h</samp>: this header declares a public runtime API threading
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layer that is only provided by the GNU Objective-C runtime. It
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declares functions such as <code>objc_mutex_lock()</code>, which provide a
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platform-independent set of threading functions.
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</li></ul>
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<p>The header files contain detailed documentation for each function in
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the GNU Objective-C runtime API.
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</p>
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<hr>
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<div class="header">
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<p>
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Next: <a href="Traditional-GNU-Objective_002dC-runtime-API.html#Traditional-GNU-Objective_002dC-runtime-API" accesskey="n" rel="next">Traditional GNU Objective-C runtime API</a>, Up: <a href="GNU-Objective_002dC-runtime-API.html#GNU-Objective_002dC-runtime-API" accesskey="u" rel="up">GNU Objective-C runtime API</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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</body>
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</html>
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