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 <div class="header">
 <p>
 Previous: <a href="C99-Thread_002dLocal-Edits.html#C99-Thread_002dLocal-Edits" accesskey="p" rel="prev">C99 Thread-Local Edits</a>, Up: <a href="Thread_002dLocal.html#Thread_002dLocal" accesskey="u" rel="up">Thread-Local</a> &nbsp; [<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>
 </div>
 <hr>
 <a name="ISO_002fIEC-14882_003a1998-Edits-for-Thread_002dLocal-Storage"></a>
 <h4 class="subsection">6.61.2 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 &ldquo;thread storage duration&rdquo; 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 [&hellip;].
 </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 [&hellip;].
 </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.  [&hellip;]
 </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="prev">C99 Thread-Local Edits</a>, Up: <a href="Thread_002dLocal.html#Thread_002dLocal" accesskey="u" rel="up">Thread-Local</a> &nbsp; [<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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	<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="prev">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="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
	</div>
	<hr>
	<a name="ISO_002fIEC-14882_003a1998-Edits-for-Thread_002dLocal-Storage"></a>
	<h4 class="subsection">6.61.2 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>
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	Previous: <a href="C99-Thread_002dLocal-Edits.html#C99-Thread_002dLocal-Edits" accesskey="p" rel="prev">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="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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