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 <span id="projectnumber">1.7.1</span>
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<div class="title">multithreaded.cpp</div> </div>
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<a href="multithreaded_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* =========================================================================</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> Copyright (c) 2010-2016, Institute for Microelectronics,</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> Institute for Analysis and Scientific Computing,</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> TU Wien.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> Portions of this software are copyright by UChicago Argonne, LLC.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"></span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> -----------------</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> ViennaCL - The Vienna Computing Library</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> -----------------</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"></span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> Project Head: Karl Rupp rupp@iue.tuwien.ac.at</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"></span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> (A list of authors and contributors can be found in the PDF manual)</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"></span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> License: MIT (X11), see file LICENSE in the base directory</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">============================================================================= */</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#ifndef VIENNACL_WITH_OPENCL</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor"> #define VIENNACL_WITH_OPENCL</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">// include necessary system headers</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <iostream></span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">//include basic scalar and vector types of ViennaCL</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include "<a class="code" href="scalar_8hpp.html">viennacl/scalar.hpp</a>"</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include "<a class="code" href="vector_8hpp.html">viennacl/vector.hpp</a>"</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#include "<a class="code" href="matrix_8hpp.html">viennacl/matrix.hpp</a>"</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#include "<a class="code" href="device_8hpp.html">viennacl/ocl/device.hpp</a>"</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include "<a class="code" href="platform_8hpp.html">viennacl/ocl/platform.hpp</a>"</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#include "<a class="code" href="backend_8hpp.html">viennacl/ocl/backend.hpp</a>"</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">//include the generic inner product functions of ViennaCL</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#include "<a class="code" href="norm__2_8hpp.html">viennacl/linalg/norm_2.hpp</a>"</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor">#include <boost/thread.hpp></span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="keyword">template</span><<span class="keyword">typename</span> NumericT></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="keyword">class </span>worker</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> {</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="keyword">public</span>:</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  worker(std::size_t tid) : thread_id_(tid) {}</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordtype">void</span> operator()()</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  {</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  std::size_t N = 6;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <a class="code" href="classviennacl_1_1context.html">viennacl::context</a> ctx(<a class="code" href="namespaceviennacl_1_1ocl.html#a82c1aba632a7ee0991eee480d5340966">viennacl::ocl::get_context</a>(static_cast<long>(thread_id_)));</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <a class="code" href="classviennacl_1_1vector.html">viennacl::vector<NumericT></a> u = <a class="code" href="structviennacl_1_1scalar__vector.html">viennacl::scalar_vector<NumericT></a>(N, <a class="code" href="tests_2src_2bisect_8cpp.html#a52b5d30a2d7b064678644a3bf49b7f6c">NumericT</a>(1) * <a class="code" href="tests_2src_2bisect_8cpp.html#a52b5d30a2d7b064678644a3bf49b7f6c">NumericT</a>(thread_id_ + 1), ctx);</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <a class="code" href="classviennacl_1_1vector.html">viennacl::vector<NumericT></a> v = <a class="code" href="structviennacl_1_1scalar__vector.html">viennacl::scalar_vector<NumericT></a>(N, <a class="code" href="tests_2src_2bisect_8cpp.html#a52b5d30a2d7b064678644a3bf49b7f6c">NumericT</a>(2) * <a class="code" href="tests_2src_2bisect_8cpp.html#a52b5d30a2d7b064678644a3bf49b7f6c">NumericT</a>(thread_id_ + 1), ctx);</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <a class="code" href="classviennacl_1_1matrix.html">viennacl::matrix<NumericT></a> A = <a class="code" href="namespaceviennacl_1_1linalg.html#a80b166d4b1b136b020820db3d7572b0d">viennacl::linalg::outer_prod</a>(u, v);</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <a class="code" href="classviennacl_1_1vector.html">viennacl::vector<NumericT></a> x(u);</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  u += v;</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <a class="code" href="tests_2src_2bisect_8cpp.html#a52b5d30a2d7b064678644a3bf49b7f6c">NumericT</a> result = <a class="code" href="namespaceviennacl_1_1linalg.html#ae46f15d01c01f92a153b3f555a15096b">viennacl::linalg::norm_2</a>(u);</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  std::stringstream ss;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  ss << <span class="stringliteral">"Result of thread "</span> << thread_id_ << <span class="stringliteral">" on device "</span> << <a class="code" href="namespaceviennacl_1_1ocl.html#a82c1aba632a7ee0991eee480d5340966">viennacl::ocl::get_context</a>(static_cast<long>(thread_id_)).<a class="code" href="classviennacl_1_1ocl_1_1context.html#a122abd131e682733ff44bdf480365ba2">devices</a>()[0].name() << <span class="stringliteral">": "</span> << result << std::endl;</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  ss << <span class="stringliteral">" A: "</span> << A << std::endl;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  ss << <span class="stringliteral">" x: "</span> << x << std::endl;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  message_ = ss.str();</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  }</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> </div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  std::string message()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> message_; }</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="keyword">private</span>:</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  std::string message_;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  std::size_t thread_id_;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> };</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="keywordtype">int</span> <a class="code" href="tests_2src_2bisect_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>()</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> {</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment">// Change this type definition to double if your gpu supports that</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">typedef</span> <span class="keywordtype">float</span> <a class="code" href="fft__1d_8cpp.html#ad5c19ca4f47d3f8ec21232a5af2624e5">ScalarType</a>;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceviennacl_1_1ocl.html#ae1e931f6efd155240b33ca440dfcfef5">viennacl::ocl::get_platforms</a>().<a class="code" href="namespaceviennacl_1_1traits.html#aa2344ea20469f55fbc15a8e9526494d0">size</a>() == 0)</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  {</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  std::cerr << <span class="stringliteral">"Error: No platform found!"</span> << std::endl;</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">return</span> EXIT_FAILURE;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  }</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <a class="code" href="classviennacl_1_1ocl_1_1platform.html">viennacl::ocl::platform</a> pf = <a class="code" href="namespaceviennacl_1_1ocl.html#ae1e931f6efd155240b33ca440dfcfef5">viennacl::ocl::get_platforms</a>()[0];</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  std::vector<viennacl::ocl::device> <span class="keyword">const</span> & devices = pf.<a class="code" href="classviennacl_1_1ocl_1_1platform.html#afaa563522ebe9ce7b80ef02c40e7fe31">devices</a>();</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="comment">// Set first device to first context:</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <a class="code" href="namespaceviennacl_1_1ocl.html#add1725d48cfd159ce187e287369d1cdb">viennacl::ocl::setup_context</a>(0, devices[0]);</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="comment">// Set second device for second context (use the same device for the second context if only one device available):</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">if</span> (devices.size() > 1)</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <a class="code" href="namespaceviennacl_1_1ocl.html#add1725d48cfd159ce187e287369d1cdb">viennacl::ocl::setup_context</a>(1, devices[1]);</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <a class="code" href="namespaceviennacl_1_1ocl.html#add1725d48cfd159ce187e287369d1cdb">viennacl::ocl::setup_context</a>(1, devices[0]);</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  worker<ScalarType> work_functor0(0);</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  worker<ScalarType> work_functor1(1);</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  boost::thread worker_thread_0(boost::ref(work_functor0));</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  boost::thread worker_thread_1(boost::ref(work_functor1));</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  worker_thread_0.join();</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  worker_thread_1.join();</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> </div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  std::cout << work_functor0.message() << std::endl;</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  std::cout << work_functor1.message() << std::endl;</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> </div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  std::cout << <span class="stringliteral">"!!!! TUTORIAL COMPLETED SUCCESSFULLY !!!!"</span> << std::endl;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordflow">return</span> EXIT_SUCCESS;</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> }</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div>
<div class="ttc" id="namespaceviennacl_1_1linalg_html_ae46f15d01c01f92a153b3f555a15096b"><div class="ttname"><a href="namespaceviennacl_1_1linalg.html#ae46f15d01c01f92a153b3f555a15096b">viennacl::linalg::norm_2</a></div><div class="ttdeci">T norm_2(std::vector< T, A > const &v1)</div><div class="ttdef"><b>Definition:</b> <a href="norm__2_8hpp_source.html#l00096">norm_2.hpp:96</a></div></div>
<div class="ttc" id="namespaceviennacl_1_1ocl_html_ae1e931f6efd155240b33ca440dfcfef5"><div class="ttname"><a href="namespaceviennacl_1_1ocl.html#ae1e931f6efd155240b33ca440dfcfef5">viennacl::ocl::get_platforms</a></div><div class="ttdeci">std::vector< platform > get_platforms()</div><div class="ttdef"><b>Definition:</b> <a href="platform_8hpp_source.html#l00124">platform.hpp:124</a></div></div>
<div class="ttc" id="norm__2_8hpp_html"><div class="ttname"><a href="norm__2_8hpp.html">norm_2.hpp</a></div><div class="ttdoc">Generic interface for the l^2-norm. See viennacl/linalg/vector_operations.hpp for implementations...</div></div>
<div class="ttc" id="device_8hpp_html"><div class="ttname"><a href="device_8hpp.html">device.hpp</a></div><div class="ttdoc">Represents an OpenCL device within ViennaCL. </div></div>
<div class="ttc" id="platform_8hpp_html"><div class="ttname"><a href="platform_8hpp.html">platform.hpp</a></div><div class="ttdoc">Implements a OpenCL platform within ViennaCL. </div></div>
<div class="ttc" id="classviennacl_1_1ocl_1_1platform_html"><div class="ttname"><a href="classviennacl_1_1ocl_1_1platform.html">viennacl::ocl::platform</a></div><div class="ttdoc">Wrapper class for an OpenCL platform. </div><div class="ttdef"><b>Definition:</b> <a href="platform_8hpp_source.html#l00045">platform.hpp:45</a></div></div>
<div class="ttc" id="matrix_8hpp_html"><div class="ttname"><a href="matrix_8hpp.html">matrix.hpp</a></div><div class="ttdoc">Implementation of the dense matrix class. </div></div>
<div class="ttc" id="tests_2src_2bisect_8cpp_html_ae66f6b31b5ad750f1fe042a706a4e3d4"><div class="ttname"><a href="tests_2src_2bisect_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a></div><div class="ttdeci">int main()</div><div class="ttdef"><b>Definition:</b> <a href="tests_2src_2bisect_8cpp_source.html#l00091">bisect.cpp:91</a></div></div>
<div class="ttc" id="classviennacl_1_1ocl_1_1platform_html_afaa563522ebe9ce7b80ef02c40e7fe31"><div class="ttname"><a href="classviennacl_1_1ocl_1_1platform.html#afaa563522ebe9ce7b80ef02c40e7fe31">viennacl::ocl::platform::devices</a></div><div class="ttdeci">std::vector< device > devices(cl_device_type dtype=CL_DEVICE_TYPE_DEFAULT)</div><div class="ttdoc">Returns the available devices of the supplied device type. </div><div class="ttdef"><b>Definition:</b> <a href="platform_8hpp_source.html#l00091">platform.hpp:91</a></div></div>
<div class="ttc" id="classviennacl_1_1matrix_html"><div class="ttname"><a href="classviennacl_1_1matrix.html">viennacl::matrix< NumericT ></a></div></div>
<div class="ttc" id="tests_2src_2bisect_8cpp_html_a52b5d30a2d7b064678644a3bf49b7f6c"><div class="ttname"><a href="tests_2src_2bisect_8cpp.html#a52b5d30a2d7b064678644a3bf49b7f6c">NumericT</a></div><div class="ttdeci">float NumericT</div><div class="ttdef"><b>Definition:</b> <a href="tests_2src_2bisect_8cpp_source.html#l00040">bisect.cpp:40</a></div></div>
<div class="ttc" id="classviennacl_1_1context_html"><div class="ttname"><a href="classviennacl_1_1context.html">viennacl::context</a></div><div class="ttdoc">Represents a generic 'context' similar to an OpenCL context, but is backend-agnostic and thus also su...</div><div class="ttdef"><b>Definition:</b> <a href="context_8hpp_source.html#l00039">context.hpp:39</a></div></div>
<div class="ttc" id="namespaceviennacl_1_1traits_html_aa2344ea20469f55fbc15a8e9526494d0"><div class="ttname"><a href="namespaceviennacl_1_1traits.html#aa2344ea20469f55fbc15a8e9526494d0">viennacl::traits::size</a></div><div class="ttdeci">vcl_size_t size(VectorType const &vec)</div><div class="ttdoc">Generic routine for obtaining the size of a vector (ViennaCL, uBLAS, etc.) </div><div class="ttdef"><b>Definition:</b> <a href="size_8hpp_source.html#l00239">size.hpp:239</a></div></div>
<div class="ttc" id="classviennacl_1_1vector_html"><div class="ttname"><a href="classviennacl_1_1vector.html">viennacl::vector< NumericT ></a></div></div>
<div class="ttc" id="backend_8hpp_html"><div class="ttname"><a href="backend_8hpp.html">backend.hpp</a></div><div class="ttdoc">Implementations of the OpenCL backend, where all contexts are stored in. </div></div>
<div class="ttc" id="namespaceviennacl_1_1linalg_html_a80b166d4b1b136b020820db3d7572b0d"><div class="ttname"><a href="namespaceviennacl_1_1linalg.html#a80b166d4b1b136b020820db3d7572b0d">viennacl::linalg::outer_prod</a></div><div class="ttdeci">viennacl::matrix_expression< const vector_base< NumericT >, const vector_base< NumericT >, op_prod > outer_prod(const vector_base< NumericT > &vec1, const vector_base< NumericT > &vec2)</div><div class="ttdoc">Returns a proxy class for the operation mat += vec1 * vec2^T, i.e. a rank 1 update. </div><div class="ttdef"><b>Definition:</b> <a href="matrix__operations_8hpp_source.html#l00840">matrix_operations.hpp:840</a></div></div>
<div class="ttc" id="vector_8hpp_html"><div class="ttname"><a href="vector_8hpp.html">vector.hpp</a></div><div class="ttdoc">The vector type with operator-overloads and proxy classes is defined here. Linear algebra operations ...</div></div>
<div class="ttc" id="structviennacl_1_1scalar__vector_html"><div class="ttname"><a href="structviennacl_1_1scalar__vector.html">viennacl::scalar_vector</a></div><div class="ttdoc">Represents a vector consisting of scalars 's' only, i.e. v[i] = s for all i. To be used as an initial...</div><div class="ttdef"><b>Definition:</b> <a href="vector__def_8hpp_source.html#l00087">vector_def.hpp:87</a></div></div>
<div class="ttc" id="fft__1d_8cpp_html_ad5c19ca4f47d3f8ec21232a5af2624e5"><div class="ttname"><a href="fft__1d_8cpp.html#ad5c19ca4f47d3f8ec21232a5af2624e5">ScalarType</a></div><div class="ttdeci">float ScalarType</div><div class="ttdef"><b>Definition:</b> <a href="fft__1d_8cpp_source.html#l00042">fft_1d.cpp:42</a></div></div>
<div class="ttc" id="namespaceviennacl_1_1ocl_html_a82c1aba632a7ee0991eee480d5340966"><div class="ttname"><a href="namespaceviennacl_1_1ocl.html#a82c1aba632a7ee0991eee480d5340966">viennacl::ocl::get_context</a></div><div class="ttdeci">viennacl::ocl::context & get_context(long i)</div><div class="ttdoc">Convenience function for returning the current context. </div><div class="ttdef"><b>Definition:</b> <a href="backend_8hpp_source.html#l00225">backend.hpp:225</a></div></div>
<div class="ttc" id="classviennacl_1_1ocl_1_1context_html_a122abd131e682733ff44bdf480365ba2"><div class="ttname"><a href="classviennacl_1_1ocl_1_1context.html#a122abd131e682733ff44bdf480365ba2">viennacl::ocl::context::devices</a></div><div class="ttdeci">std::vector< viennacl::ocl::device > const & devices() const </div><div class="ttdoc">Returns a vector with all devices in this context. </div><div class="ttdef"><b>Definition:</b> <a href="ocl_2context_8hpp_source.html#l00106">context.hpp:106</a></div></div>
<div class="ttc" id="scalar_8hpp_html"><div class="ttname"><a href="scalar_8hpp.html">scalar.hpp</a></div><div class="ttdoc">Implementation of the ViennaCL scalar class. </div></div>
<div class="ttc" id="namespaceviennacl_1_1ocl_html_add1725d48cfd159ce187e287369d1cdb"><div class="ttname"><a href="namespaceviennacl_1_1ocl.html#add1725d48cfd159ce187e287369d1cdb">viennacl::ocl::setup_context</a></div><div class="ttdeci">void setup_context(long i, std::vector< cl_device_id > const &devices)</div><div class="ttdoc">Convenience function for setting devices for a context. </div><div class="ttdef"><b>Definition:</b> <a href="backend_8hpp_source.html#l00231">backend.hpp:231</a></div></div>
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