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diff --git a/share/doc/gcc/C_002b_002b98-Thread_002dLocal-Edits.html b/share/doc/gcc/C_002b_002b98-Thread_002dLocal-Edits.html new file mode 100644 index 0000000..513c985 --- /dev/null +++ b/share/doc/gcc/C_002b_002b98-Thread_002dLocal-Edits.html @@ -0,0 +1,216 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- This file documents the use of the GNU compilers. + +Copyright (C) 1988-2023 Free Software Foundation, Inc. + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with the +Invariant Sections being "Funding Free Software", the Front-Cover +Texts being (a) (see below), and with the Back-Cover Texts being (b) +(see below). A copy of the license is included in the section entitled +"GNU Free Documentation License". + +(a) The FSF's Front-Cover Text is: + +A GNU Manual + +(b) The FSF's Back-Cover Text is: + +You have freedom to copy and modify this GNU Manual, like GNU + software. Copies published by the Free Software Foundation raise + funds for GNU development. --> +<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>Using the GNU Compiler Collection (GCC): C++98 Thread-Local Edits</title> + +<meta name="description" content="Using the GNU Compiler Collection (GCC): C++98 Thread-Local Edits"> +<meta name="keywords" content="Using the GNU Compiler Collection (GCC): C++98 Thread-Local Edits"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> +<link href="index.html#Top" rel="start" title="Top"> +<link href="Indices.html#Indices" rel="index" title="Indices"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="Thread_002dLocal.html#Thread_002dLocal" rel="up" title="Thread-Local"> +<link href="Binary-constants.html#Binary-constants" rel="next" title="Binary constants"> +<link href="C99-Thread_002dLocal-Edits.html#C99-Thread_002dLocal-Edits" rel="previous" title="C99 Thread-Local Edits"> +<style type="text/css"> +<!-- +a.summary-letter {text-decoration: none} +blockquote.smallquotation {font-size: smaller} +div.display {margin-left: 3.2em} +div.example {margin-left: 3.2em} +div.indentedblock {margin-left: 3.2em} +div.lisp {margin-left: 3.2em} +div.smalldisplay {margin-left: 3.2em} +div.smallexample {margin-left: 3.2em} +div.smallindentedblock {margin-left: 3.2em; font-size: smaller} +div.smalllisp {margin-left: 3.2em} +kbd {font-style:oblique} +pre.display {font-family: inherit} +pre.format {font-family: inherit} +pre.menu-comment {font-family: serif} +pre.menu-preformatted {font-family: serif} +pre.smalldisplay {font-family: inherit; font-size: smaller} +pre.smallexample {font-size: smaller} +pre.smallformat {font-family: inherit; font-size: smaller} +pre.smalllisp {font-size: smaller} +span.nocodebreak {white-space:nowrap} +span.nolinebreak {white-space:nowrap} +span.roman {font-family:serif; font-weight:normal} +span.sansserif {font-family:sans-serif; font-weight:normal} +ul.no-bullet {list-style: none} +--> +</style> + + +</head> + +<body lang="en_US" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> +<a name="C_002b_002b98-Thread_002dLocal-Edits"></a> +<div class="header"> +<p> +Previous: <a href="C99-Thread_002dLocal-Edits.html#C99-Thread_002dLocal-Edits" accesskey="p" rel="previous">C99 Thread-Local Edits</a>, Up: <a href="Thread_002dLocal.html#Thread_002dLocal" accesskey="u" rel="up">Thread-Local</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indices.html#Indices" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<a name="ISO_002fIEC-14882_003a1998-Edits-for-Thread_002dLocal-Storage"></a> +<h4 class="subsection">6.64.2 ISO/IEC 14882:1998 Edits for Thread-Local Storage</h4> + +<p>The following are a set of changes to ISO/IEC 14882:1998 (aka C++98) +that document the exact semantics of the language extension. +</p> +<ul> +<li> <b>[intro.execution]</b> + +<p>New text after paragraph 4 +</p> +<blockquote> +<p>A <em>thread</em> is a flow of control within the abstract machine. +It is implementation defined whether or not there may be more than +one thread. +</p></blockquote> + +<p>New text after paragraph 7 +</p> +<blockquote> +<p>It is unspecified whether additional action must be taken to +ensure when and whether side effects are visible to other threads. +</p></blockquote> + +</li><li> <b>[lex.key]</b> + +<p>Add <code>__thread</code>. +</p> +</li><li> <b>[basic.start.main]</b> + +<p>Add after paragraph 5 +</p> +<blockquote> +<p>The thread that begins execution at the <code>main</code> function is called +the <em>main thread</em>. It is implementation defined how functions +beginning threads other than the main thread are designated or typed. +A function so designated, as well as the <code>main</code> function, is called +a <em>thread startup function</em>. It is implementation defined what +happens if a thread startup function returns. It is implementation +defined what happens to other threads when any thread calls <code>exit</code>. +</p></blockquote> + +</li><li> <b>[basic.start.init]</b> + +<p>Add after paragraph 4 +</p> +<blockquote> +<p>The storage for an object of thread storage duration shall be +statically initialized before the first statement of the thread startup +function. An object of thread storage duration shall not require +dynamic initialization. +</p></blockquote> + +</li><li> <b>[basic.start.term]</b> + +<p>Add after paragraph 3 +</p> +<blockquote> +<p>The type of an object with thread storage duration shall not have a +non-trivial destructor, nor shall it be an array type whose elements +(directly or indirectly) have non-trivial destructors. +</p></blockquote> + +</li><li> <b>[basic.stc]</b> + +<p>Add “thread storage duration” to the list in paragraph 1. +</p> +<p>Change paragraph 2 +</p> +<blockquote> +<p>Thread, static, and automatic storage durations are associated with +objects introduced by declarations […]. +</p></blockquote> + +<p>Add <code>__thread</code> to the list of specifiers in paragraph 3. +</p> +</li><li> <b>[basic.stc.thread]</b> + +<p>New section before <b>[basic.stc.static]</b> +</p> +<blockquote> +<p>The keyword <code>__thread</code> applied to a non-local object gives the +object thread storage duration. +</p> +<p>A local variable or class data member declared both <code>static</code> +and <code>__thread</code> gives the variable or member thread storage +duration. +</p></blockquote> + +</li><li> <b>[basic.stc.static]</b> + +<p>Change paragraph 1 +</p> +<blockquote> +<p>All objects that have neither thread storage duration, dynamic +storage duration nor are local […]. +</p></blockquote> + +</li><li> <b>[dcl.stc]</b> + +<p>Add <code>__thread</code> to the list in paragraph 1. +</p> +<p>Change paragraph 1 +</p> +<blockquote> +<p>With the exception of <code>__thread</code>, at most one +<var>storage-class-specifier</var> shall appear in a given +<var>decl-specifier-seq</var>. The <code>__thread</code> specifier may +be used alone, or immediately following the <code>extern</code> or +<code>static</code> specifiers. […] +</p></blockquote> + +<p>Add after paragraph 5 +</p> +<blockquote> +<p>The <code>__thread</code> specifier can be applied only to the names of objects +and to anonymous unions. +</p></blockquote> + +</li><li> <b>[class.mem]</b> + +<p>Add after paragraph 6 +</p> +<blockquote> +<p>Non-<code>static</code> members shall not be <code>__thread</code>. +</p></blockquote> +</li></ul> + +<hr> +<div class="header"> +<p> +Previous: <a href="C99-Thread_002dLocal-Edits.html#C99-Thread_002dLocal-Edits" accesskey="p" rel="previous">C99 Thread-Local Edits</a>, Up: <a href="Thread_002dLocal.html#Thread_002dLocal" accesskey="u" rel="up">Thread-Local</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indices.html#Indices" title="Index" rel="index">Index</a>]</p> +</div> + + + +</body> +</html> |