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<h1 class="topictitle1">tbb_exception</h1>
<div><div class="section"><h2 class="sectiontitle">Summary</h2>
<p>Exception that can be moved to another thread.</p>
</div>
<div class="section"><h2 class="sectiontitle">Syntax</h2>
<pre>class tbb_exception;</pre>
</div>
<div class="section"><h2 class="sectiontitle">Header</h2>
<pre>#include "tbb/tbb_exception.h"</pre>
</div>
<div class="section"><h2 class="sectiontitle">Description</h2>
<p>In a parallel environment, exceptions sometimes have to be propagated across threads. Class <samp class="codeph">tbb_exception</samp> subclasses <samp class="codeph">std::exception</samp> to add support for such propagation. </p>
</div>
<div class="section"><h2 class="sectiontitle">Members</h2>
<pre> namespace tbb {
class tbb_exception: public std::exception {
virtual tbb_exception* move() = 0;
virtual void destroy() throw() = 0;
virtual void throw_self() = 0;
virtual const char* name() throw() = 0;
virtual const char* what() throw() = 0;
};
}</pre>
<p>Derived classes should define the abstract virtual methods as follows:</p>
<ul type="disc">
<li><p><samp class="codeph">move()</samp> should create a pointer to a copy of the exception that can outlive the original. It may move the contents of the original.</p>
</li>
<li><p><samp class="codeph">destroy()</samp> should destroy a copy created by <samp class="codeph">move()</samp>.</p>
</li>
<li><p><samp class="codeph">throw_self()</samp> should throw <samp class="codeph">*this</samp>. </p>
</li>
<li><p><samp class="codeph">name()</samp> typically returns the RTTI name of the originally intercepted exception.</p>
</li>
<li><p><samp class="codeph">what()</samp> returns a null-terminated string describing the exception.</p>
</li>
</ul>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="../../reference/exceptions.htm">Exceptions</a></div>
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