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<h1 class="topictitle1">Thread Local Storage</h1>
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<p>Intel® Threading Building Blocks (Intel® TBB)
provides two template classes for thread local storage. Both provide a
thread-local element per thread. Both lazily create the elements on demand.
They differ in their intended use models:
</p>
<p><samp class="codeph">combinable</samp> provides thread-local
storage for holding per-thread subcomputations that will later be reduced to a
single result. It is PPL compatible.
</p>
<p><samp class="codeph">enumerable_thread_specific</samp>
provides thread-local storage that acts like an STL container with one element
per thread. The container permits iterating over the elements using the usual
STL iteration idioms.
</p>
<p>This section also describes template class
<samp class="codeph">flatten2d</samp>, which assists a common idiom where an
<samp class="codeph">enumerable_thread_specific</samp> represents a container
partitioner across threads.
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<div class="parentlink"><strong>Parent topic:</strong> <a href="../reference/reference.htm">Intel® Threading Building Blocks Reference Manual</a></div>
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<li class="ulchildlink"><a href="../reference/thread_local_storage/combinable_cls.htm">combinable Template Class</a><br>
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<li class="ulchildlink"><a href="../reference/thread_local_storage/enumerable_thread_specific_cls.htm">enumerable_thread_specific Template Class</a><br>
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<li class="ulchildlink"><a href="../reference/thread_local_storage/flattened2d_cls.htm">flattened2d Template Class</a><br>
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