428 lines
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428 lines
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<h1>
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<div class="m-doc-include m-code m-inverted m-right-m m-text-right"><span class="cp">#include</span> <a class="cpf" href="cuda__memory_8hpp.html"><taskflow/cuda/cuda_memory.hpp></a></div>
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<div class="m-doc-template">template<typename T></div>
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<span class="m-breadcrumb"><a href="namespacetf.html">tf</a>::<wbr/></span>cudaUSMAllocator <span class="m-thin">class</span>
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</h1>
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<p>class to create a unified shared memory (USM) allocator</p>
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<table class="m-table m-fullwidth m-flat">
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<thead>
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<tr><th colspan="2">Template parameters</th></tr>
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</thead>
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<tbody>
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<tr>
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<td style="width: 1%">T</td>
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<td>element type</td>
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</tr>
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</tbody>
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</table>
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<nav class="m-block m-default">
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<h3>Contents</h3>
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<ul>
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<li>
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Reference
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<ul>
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<li><a href="#pub-types">Public types</a></li>
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<li><a href="#typeless-methods">Constructors, destructors, conversion operators</a></li>
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<li><a href="#pub-methods">Public functions</a></li>
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</ul>
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</li>
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</ul>
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</nav>
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<p>A cudaUSMAllocator enables using unified shared memory (USM) allocation for standard library containers. It is typically passed as template parameter when declaring standard library containers (e.g. <a href="http://en.cppreference.com/w/cpp/container/vector.html" class="m-doc-external">std::<wbr />vector</a>).</p>
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<section id="pub-types">
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<h2><a href="#pub-types">Public types</a></h2>
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<dl class="m-doc">
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<dt>
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<div class="m-doc-template">template<typename U></div>
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struct <a href="structtf_1_1cudaUSMAllocator_1_1rebind.html" class="m-doc">rebind</a>
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</dt>
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<dd>its member type <code>U</code> is the equivalent allocator type to allocate elements of type U</dd>
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<dt id="a4ab981d38c36112b589a3b67c510fc50">
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using <a href="#a4ab981d38c36112b589a3b67c510fc50" class="m-doc-self">value_type</a> = T
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</dt>
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<dd>element type</dd>
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<dt id="a580e704508e250311f4dce9c6413d900">
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using <a href="#a580e704508e250311f4dce9c6413d900" class="m-doc-self">pointer</a> = T*
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</dt>
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<dd>element pointer type</dd>
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<dt id="ae700ece72b4eeb0f13f612455878f0a9">
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using <a href="#ae700ece72b4eeb0f13f612455878f0a9" class="m-doc-self">reference</a> = T&
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</dt>
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<dd>element reference type</dd>
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<dt id="a1bbd56f975fd433c1fd86d5008373ad0">
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using <a href="#a1bbd56f975fd433c1fd86d5008373ad0" class="m-doc-self">const_pointer</a> = const T*
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</dt>
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<dd>const element pointer type</dd>
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<dt id="af5b1bd492a8de28eb75c136ee391b006">
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using <a href="#af5b1bd492a8de28eb75c136ee391b006" class="m-doc-self">const_reference</a> = const T&
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</dt>
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<dd>constant element reference type</dd>
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<dt id="a2d145987f7535219dcfe47ee6765b2ad">
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using <a href="#a2d145987f7535219dcfe47ee6765b2ad" class="m-doc-self">size_type</a> = <a href="http://en.cppreference.com/w/cpp/types/size_t.html" class="m-doc-external">std::<wbr />size_t</a>
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</dt>
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<dd>size type</dd>
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<dt id="aae5fff6eb8fd2e61f686d6e3ccb9ba9d">
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using <a href="#aae5fff6eb8fd2e61f686d6e3ccb9ba9d" class="m-doc-self">difference_type</a> = <a href="http://en.cppreference.com/w/cpp/types/ptrdiff_t.html" class="m-doc-external">std::<wbr />ptrdiff_t</a>
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</dt>
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<dd>pointer difference type</dd>
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</dl>
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</section>
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<section id="typeless-methods">
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<h2><a href="#typeless-methods">Constructors, destructors, conversion operators</a></h2>
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<dl class="m-doc">
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<dt id="a10c30e951b3dab81261c26e91b0ec62b">
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<span class="m-doc-wrap-bumper"><a href="#a10c30e951b3dab81261c26e91b0ec62b" class="m-doc-self">cudaUSMAllocator</a>(</span><span class="m-doc-wrap">) <span class="m-label m-flat m-success">noexcept</span></span>
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</dt>
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<dd>Constructs a device allocator object.</dd>
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<dt id="a8b881c3608e2886513c0364e9fdc417f">
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<span class="m-doc-wrap-bumper"><a href="#a8b881c3608e2886513c0364e9fdc417f" class="m-doc-self">cudaUSMAllocator</a>(</span><span class="m-doc-wrap">const <a href="classtf_1_1cudaUSMAllocator.html" class="m-doc">cudaUSMAllocator</a>&) <span class="m-label m-flat m-success">noexcept</span></span>
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</dt>
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<dd>Constructs a device allocator object from another device allocator object.</dd>
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<dt id="a19981496b14b5a29cc2f71dfc25eecd1">
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<div class="m-doc-template">template<typename U></div>
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<span class="m-doc-wrap-bumper"><a href="#a19981496b14b5a29cc2f71dfc25eecd1" class="m-doc-self">cudaUSMAllocator</a>(</span><span class="m-doc-wrap">const <a href="classtf_1_1cudaUSMAllocator.html" class="m-doc">cudaUSMAllocator</a><U>&) <span class="m-label m-flat m-success">noexcept</span></span>
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</dt>
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<dd>Constructs a device allocator object from another device allocator object with a different element type.</dd>
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<dt id="a8bfebfc64bc7781856870f143a84f03b">
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<span class="m-doc-wrap-bumper"><a href="#a8bfebfc64bc7781856870f143a84f03b" class="m-doc-self">~cudaUSMAllocator</a>(</span><span class="m-doc-wrap">) <span class="m-label m-flat m-success">noexcept</span></span>
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</dt>
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<dd>Destructs the device allocator object.</dd>
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</dl>
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</section>
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<section id="pub-methods">
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<h2><a href="#pub-methods">Public functions</a></h2>
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<dl class="m-doc">
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<dt>
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<span class="m-doc-wrap-bumper">auto <a href="#a174d32365a682da21469e155b95d3260" class="m-doc">address</a>(</span><span class="m-doc-wrap"><a href="#ae700ece72b4eeb0f13f612455878f0a9" class="m-doc">reference</a> x) -> <a href="#a580e704508e250311f4dce9c6413d900" class="m-doc">pointer</a></span>
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</dt>
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<dd>Returns the address of x.</dd>
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<dt>
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<span class="m-doc-wrap-bumper">auto <a href="#ae9e99ab1ec08d419798e50f8d5b49802" class="m-doc">address</a>(</span><span class="m-doc-wrap"><a href="#af5b1bd492a8de28eb75c136ee391b006" class="m-doc">const_<wbr />reference</a> x) const -> <a href="#a1bbd56f975fd433c1fd86d5008373ad0" class="m-doc">const_<wbr />pointer</a></span>
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</dt>
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<dd>Returns the address of x.</dd>
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<dt>
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<span class="m-doc-wrap-bumper">auto <a href="#afa664496a897fc04442a5fc1988b8759" class="m-doc">allocate</a>(</span><span class="m-doc-wrap"><a href="#a2d145987f7535219dcfe47ee6765b2ad" class="m-doc">size_<wbr />type</a> n,
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const void* = 0) -> <a href="#a580e704508e250311f4dce9c6413d900" class="m-doc">pointer</a></span>
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</dt>
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<dd>allocates block of storage.</dd>
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<dt>
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<span class="m-doc-wrap-bumper">void <a href="#a0ec189c941b389062106a37fde46677a" class="m-doc">deallocate</a>(</span><span class="m-doc-wrap"><a href="#a580e704508e250311f4dce9c6413d900" class="m-doc">pointer</a> ptr,
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<a href="#a2d145987f7535219dcfe47ee6765b2ad" class="m-doc">size_<wbr />type</a>)</span>
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</dt>
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<dd>Releases a block of storage previously allocated with member allocate and not yet released.</dd>
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<dt>
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<span class="m-doc-wrap-bumper">auto <a href="#abdf3c2024de5972e7d13d15d4960c984" class="m-doc">max_size</a>(</span><span class="m-doc-wrap">) const -> <a href="#a2d145987f7535219dcfe47ee6765b2ad" class="m-doc">size_<wbr />type</a> <span class="m-label m-flat m-success">noexcept</span></span>
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</dt>
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<dd>returns the maximum number of elements that could potentially be allocated by this allocator</dd>
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<dt>
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<span class="m-doc-wrap-bumper">void <a href="#a9218d72dc90bc87b1ac648f5bf923439" class="m-doc">construct</a>(</span><span class="m-doc-wrap"><a href="#a580e704508e250311f4dce9c6413d900" class="m-doc">pointer</a> ptr,
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<a href="#af5b1bd492a8de28eb75c136ee391b006" class="m-doc">const_<wbr />reference</a> val)</span>
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</dt>
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<dd>Constructs an element object on the location pointed by ptr.</dd>
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<dt>
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<span class="m-doc-wrap-bumper">void <a href="#a33ea798011c837c65251b756ae3d66f9" class="m-doc">destroy</a>(</span><span class="m-doc-wrap"><a href="#a580e704508e250311f4dce9c6413d900" class="m-doc">pointer</a> ptr)</span>
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</dt>
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<dd>destroys in-place the object pointed by <code>ptr</code></dd>
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<dt>
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<div class="m-doc-template">template<typename U></div>
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<span class="m-doc-wrap-bumper">auto <a href="#aea7c8c9232f588faaf274c4439ca936d" class="m-doc">operator==</a>(</span><span class="m-doc-wrap">const <a href="classtf_1_1cudaUSMAllocator.html" class="m-doc">cudaUSMAllocator</a><U>&) const -> bool <span class="m-label m-flat m-success">noexcept</span></span>
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</dt>
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<dd>compares two allocator of different types using <code>==</code></dd>
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<dt>
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<div class="m-doc-template">template<typename U></div>
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<span class="m-doc-wrap-bumper">auto <a href="#abf8b566b8863b5a460e816a5f3d5fd7b" class="m-doc">operator!=</a>(</span><span class="m-doc-wrap">const <a href="classtf_1_1cudaUSMAllocator.html" class="m-doc">cudaUSMAllocator</a><U>&) const -> bool <span class="m-label m-flat m-success">noexcept</span></span>
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</dt>
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<dd>compares two allocator of different types using <code>!=</code></dd>
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</dl>
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</section>
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<section>
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<h2>Function documentation</h2>
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<section class="m-doc-details" id="a174d32365a682da21469e155b95d3260"><div>
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<h3>
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<div class="m-doc-template">
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template<typename T>
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</div>
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<span class="m-doc-wrap-bumper"><a href="#a580e704508e250311f4dce9c6413d900" class="m-doc">pointer</a> tf::<wbr />cudaUSMAllocator<T>::<wbr /></span><span class="m-doc-wrap"><span class="m-doc-wrap-bumper"><a href="#a174d32365a682da21469e155b95d3260" class="m-doc-self">address</a>(</span><span class="m-doc-wrap"><a href="#ae700ece72b4eeb0f13f612455878f0a9" class="m-doc">reference</a> x)</span></span>
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</h3>
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<p>Returns the address of x.</p>
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<table class="m-table m-fullwidth m-flat">
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<thead>
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<tr><th colspan="2">Parameters</th></tr>
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</thead>
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<tbody>
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<tr>
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<td style="width: 1%">x</td>
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<td>reference to an object</td>
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</tr>
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</tbody>
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<tfoot>
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<tr>
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<th>Returns</th>
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<td>a pointer to the object</td>
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</tr>
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</tfoot>
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</table>
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<p>This effectively means returning &x.</p>
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</div></section>
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<section class="m-doc-details" id="ae9e99ab1ec08d419798e50f8d5b49802"><div>
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<h3>
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<div class="m-doc-template">
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template<typename T>
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</div>
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<span class="m-doc-wrap-bumper"><a href="#a1bbd56f975fd433c1fd86d5008373ad0" class="m-doc">const_<wbr />pointer</a> tf::<wbr />cudaUSMAllocator<T>::<wbr /></span><span class="m-doc-wrap"><span class="m-doc-wrap-bumper"><a href="#ae9e99ab1ec08d419798e50f8d5b49802" class="m-doc-self">address</a>(</span><span class="m-doc-wrap"><a href="#af5b1bd492a8de28eb75c136ee391b006" class="m-doc">const_<wbr />reference</a> x) const</span></span>
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</h3>
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<p>Returns the address of x.</p>
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<table class="m-table m-fullwidth m-flat">
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<thead>
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<tr><th colspan="2">Parameters</th></tr>
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</thead>
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<tbody>
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<tr>
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<td style="width: 1%">x</td>
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<td>reference to an object</td>
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</tr>
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</tbody>
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<tfoot>
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<tr>
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<th>Returns</th>
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<td>a pointer to the object</td>
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</tr>
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</tfoot>
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</table>
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<p>This effectively means returning &x.</p>
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</div></section>
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<section class="m-doc-details" id="afa664496a897fc04442a5fc1988b8759"><div>
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<h3>
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<div class="m-doc-template">
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template<typename T>
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</div>
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<span class="m-doc-wrap-bumper"><a href="#a580e704508e250311f4dce9c6413d900" class="m-doc">pointer</a> tf::<wbr />cudaUSMAllocator<T>::<wbr /></span><span class="m-doc-wrap"><span class="m-doc-wrap-bumper"><a href="#afa664496a897fc04442a5fc1988b8759" class="m-doc-self">allocate</a>(</span><span class="m-doc-wrap"><a href="#a2d145987f7535219dcfe47ee6765b2ad" class="m-doc">size_<wbr />type</a> n,
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const void* = 0)</span></span>
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</h3>
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<p>allocates block of storage.</p>
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<table class="m-table m-fullwidth m-flat">
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<thead>
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<tr><th colspan="2">Parameters</th></tr>
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</thead>
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<tbody>
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<tr>
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<td style="width: 1%">n</td>
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<td>number of elements (each of size sizeof(value_type)) to be allocated</td>
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</tr>
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</tbody>
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<tfoot>
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<tr>
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<th>Returns</th>
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<td>a pointer to the initial element in the block of storage.</td>
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</tr>
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</tfoot>
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</table>
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<p>Attempts to allocate a block of storage with a size large enough to contain <code>n</code> elements of member type, <code>value_type</code>, and returns a pointer to the first element.</p><p>The storage is aligned appropriately for object of type <code>value_type</code>, but they are not constructed.</p><p>The block of storage is allocated using cudaMalloc and throws <a href="http://en.cppreference.com/w/cpp/memory/new/bad_alloc.html" class="m-doc-external">std::<wbr />bad_alloc</a> if it cannot allocate the total amount of storage requested.</p>
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</div></section>
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<section class="m-doc-details" id="a0ec189c941b389062106a37fde46677a"><div>
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<h3>
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<div class="m-doc-template">
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template<typename T>
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</div>
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<span class="m-doc-wrap-bumper">void tf::<wbr />cudaUSMAllocator<T>::<wbr /></span><span class="m-doc-wrap"><span class="m-doc-wrap-bumper"><a href="#a0ec189c941b389062106a37fde46677a" class="m-doc-self">deallocate</a>(</span><span class="m-doc-wrap"><a href="#a580e704508e250311f4dce9c6413d900" class="m-doc">pointer</a> ptr,
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<a href="#a2d145987f7535219dcfe47ee6765b2ad" class="m-doc">size_<wbr />type</a>)</span></span>
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</h3>
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<p>Releases a block of storage previously allocated with member allocate and not yet released.</p>
|
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<table class="m-table m-fullwidth m-flat">
|
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<thead>
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|
<tr><th colspan="2">Parameters</th></tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td style="width: 1%">ptr</td>
|
|
<td>pointer to a block of storage previously allocated with allocate</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>The elements in the array are not destroyed by a call to this member function.</p>
|
|
</div></section>
|
|
<section class="m-doc-details" id="abdf3c2024de5972e7d13d15d4960c984"><div>
|
|
<h3>
|
|
<div class="m-doc-template">
|
|
template<typename T>
|
|
</div>
|
|
<span class="m-doc-wrap-bumper"><a href="#a2d145987f7535219dcfe47ee6765b2ad" class="m-doc">size_<wbr />type</a> tf::<wbr />cudaUSMAllocator<T>::<wbr /></span><span class="m-doc-wrap"><span class="m-doc-wrap-bumper"><a href="#abdf3c2024de5972e7d13d15d4960c984" class="m-doc-self">max_size</a>(</span><span class="m-doc-wrap">) const <span class="m-label m-success">noexcept</span></span></span>
|
|
</h3>
|
|
<p>returns the maximum number of elements that could potentially be allocated by this allocator</p>
|
|
<table class="m-table m-fullwidth m-flat">
|
|
<tfoot>
|
|
<tr>
|
|
<th style="width: 1%">Returns</th>
|
|
<td>the number of elements that might be allocated as maximum by a call to member allocate</td>
|
|
</tr>
|
|
</tfoot>
|
|
</table>
|
|
<p>A call to member allocate with the value returned by this function can still fail to allocate the requested storage.</p>
|
|
</div></section>
|
|
<section class="m-doc-details" id="a9218d72dc90bc87b1ac648f5bf923439"><div>
|
|
<h3>
|
|
<div class="m-doc-template">
|
|
template<typename T>
|
|
</div>
|
|
<span class="m-doc-wrap-bumper">void tf::<wbr />cudaUSMAllocator<T>::<wbr /></span><span class="m-doc-wrap"><span class="m-doc-wrap-bumper"><a href="#a9218d72dc90bc87b1ac648f5bf923439" class="m-doc-self">construct</a>(</span><span class="m-doc-wrap"><a href="#a580e704508e250311f4dce9c6413d900" class="m-doc">pointer</a> ptr,
|
|
<a href="#af5b1bd492a8de28eb75c136ee391b006" class="m-doc">const_<wbr />reference</a> val)</span></span>
|
|
</h3>
|
|
<p>Constructs an element object on the location pointed by ptr.</p>
|
|
<table class="m-table m-fullwidth m-flat">
|
|
<thead>
|
|
<tr><th colspan="2">Parameters</th></tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td style="width: 1%">ptr</td>
|
|
<td>pointer to a location with enough storage soace to contain an element of type <code>value_type</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td>val</td>
|
|
<td>value to initialize the constructed element to</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div></section>
|
|
<section class="m-doc-details" id="a33ea798011c837c65251b756ae3d66f9"><div>
|
|
<h3>
|
|
<div class="m-doc-template">
|
|
template<typename T>
|
|
</div>
|
|
<span class="m-doc-wrap-bumper">void tf::<wbr />cudaUSMAllocator<T>::<wbr /></span><span class="m-doc-wrap"><span class="m-doc-wrap-bumper"><a href="#a33ea798011c837c65251b756ae3d66f9" class="m-doc-self">destroy</a>(</span><span class="m-doc-wrap"><a href="#a580e704508e250311f4dce9c6413d900" class="m-doc">pointer</a> ptr)</span></span>
|
|
</h3>
|
|
<p>destroys in-place the object pointed by <code>ptr</code></p>
|
|
<table class="m-table m-fullwidth m-flat">
|
|
<thead>
|
|
<tr><th colspan="2">Parameters</th></tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td style="width: 1%">ptr</td>
|
|
<td>pointer to the object to be destroye</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>Notice that this does not deallocate the storage for the element but calls its destructor.</p>
|
|
</div></section>
|
|
<section class="m-doc-details" id="aea7c8c9232f588faaf274c4439ca936d"><div>
|
|
<h3>
|
|
<div class="m-doc-template">
|
|
template<typename T>
|
|
template<typename U>
|
|
</div>
|
|
<span class="m-doc-wrap-bumper">bool tf::<wbr />cudaUSMAllocator<T>::<wbr /></span><span class="m-doc-wrap"><span class="m-doc-wrap-bumper"><a href="#aea7c8c9232f588faaf274c4439ca936d" class="m-doc-self">operator==</a>(</span><span class="m-doc-wrap">const <a href="classtf_1_1cudaUSMAllocator.html" class="m-doc">cudaUSMAllocator</a><U>&) const <span class="m-label m-success">noexcept</span></span></span>
|
|
</h3>
|
|
<p>compares two allocator of different types using <code>==</code></p>
|
|
<p>USM allocators of different types are always equal to each other because the storage allocated by the allocator <code>a1</code> can be deallocated through <code>a2</code>.</p>
|
|
</div></section>
|
|
<section class="m-doc-details" id="abf8b566b8863b5a460e816a5f3d5fd7b"><div>
|
|
<h3>
|
|
<div class="m-doc-template">
|
|
template<typename T>
|
|
template<typename U>
|
|
</div>
|
|
<span class="m-doc-wrap-bumper">bool tf::<wbr />cudaUSMAllocator<T>::<wbr /></span><span class="m-doc-wrap"><span class="m-doc-wrap-bumper"><a href="#abf8b566b8863b5a460e816a5f3d5fd7b" class="m-doc-self">operator!=</a>(</span><span class="m-doc-wrap">const <a href="classtf_1_1cudaUSMAllocator.html" class="m-doc">cudaUSMAllocator</a><U>&) const <span class="m-label m-success">noexcept</span></span></span>
|
|
</h3>
|
|
<p>compares two allocator of different types using <code>!=</code></p>
|
|
<p>USM allocators of different types are always equal to each other because the storage allocated by the allocator <code>a1</code> can be deallocated through <code>a2</code>.</p>
|
|
</div></section>
|
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</section>
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</div>
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