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<p>Implementations of the OpenCL backend, where all contexts are stored in.
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<div class="textblock"><code>#include <vector></code><br/>
<code>#include "<a class="el" href="ocl_2context_8hpp_source.html">viennacl/ocl/context.hpp</a>"</code><br/>
<code>#include "<a class="el" href="enqueue_8hpp_source.html">viennacl/ocl/enqueue.hpp</a>"</code><br/>
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<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">A backend that provides contexts for ViennaCL objects (vector, matrix, etc.) <a href="classviennacl_1_1ocl_1_1backend.html#details">More...</a><br/></td></tr>
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<tr class="memdesc:namespaceviennacl"><td class="mdescLeft"> </td><td class="mdescRight">Main namespace in ViennaCL. Holds all the basic types such as vector, matrix, etc. and defines operations upon them. <br/></td></tr>
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<tr class="memitem:a16fc917445ce2010e7b16fbc968771b7"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classviennacl_1_1ocl_1_1context.html">viennacl::ocl::context</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#a16fc917445ce2010e7b16fbc968771b7">viennacl::ocl::current_context</a> ()</td></tr>
<tr class="memdesc:a16fc917445ce2010e7b16fbc968771b7"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for returning the current context. <a href="#a16fc917445ce2010e7b16fbc968771b7">More...</a><br/></td></tr>
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<tr class="memitem:acc1a7460a9ff237b7c0306c32c3d34c6"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#acc1a7460a9ff237b7c0306c32c3d34c6">viennacl::ocl::switch_context</a> (long i)</td></tr>
<tr class="memdesc:acc1a7460a9ff237b7c0306c32c3d34c6"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for switching the current context. <a href="#acc1a7460a9ff237b7c0306c32c3d34c6">More...</a><br/></td></tr>
<tr class="separator:acc1a7460a9ff237b7c0306c32c3d34c6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a82c1aba632a7ee0991eee480d5340966"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classviennacl_1_1ocl_1_1context.html">viennacl::ocl::context</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#a82c1aba632a7ee0991eee480d5340966">viennacl::ocl::get_context</a> (long i)</td></tr>
<tr class="memdesc:a82c1aba632a7ee0991eee480d5340966"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for returning the current context. <a href="#a82c1aba632a7ee0991eee480d5340966">More...</a><br/></td></tr>
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<tr class="memitem:add1725d48cfd159ce187e287369d1cdb"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#add1725d48cfd159ce187e287369d1cdb">viennacl::ocl::setup_context</a> (long i, std::vector< cl_device_id > const &devices)</td></tr>
<tr class="memdesc:add1725d48cfd159ce187e287369d1cdb"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for setting devices for a context. <a href="#add1725d48cfd159ce187e287369d1cdb">More...</a><br/></td></tr>
<tr class="separator:add1725d48cfd159ce187e287369d1cdb"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a82b136323ba25f51eeac6c8afd95d897"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#a82b136323ba25f51eeac6c8afd95d897">viennacl::ocl::setup_context</a> (long i, <a class="el" href="classviennacl_1_1ocl_1_1device.html">viennacl::ocl::device</a> const &device)</td></tr>
<tr class="memdesc:a82b136323ba25f51eeac6c8afd95d897"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for setting devices for a context. <a href="#a82b136323ba25f51eeac6c8afd95d897">More...</a><br/></td></tr>
<tr class="separator:a82b136323ba25f51eeac6c8afd95d897"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a643e413cdc3e3d682c8ae0c6f0a83e0a"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#a643e413cdc3e3d682c8ae0c6f0a83e0a">viennacl::ocl::setup_context</a> (long i, cl_context c, std::vector< cl_device_id > const &devices, std::map< cl_device_id, std::vector< cl_command_queue > > const &queues)</td></tr>
<tr class="memdesc:a643e413cdc3e3d682c8ae0c6f0a83e0a"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for setting up a context in ViennaCL from an existing OpenCL context. <a href="#a643e413cdc3e3d682c8ae0c6f0a83e0a">More...</a><br/></td></tr>
<tr class="separator:a643e413cdc3e3d682c8ae0c6f0a83e0a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aae5ebc6a53d1c2ac134b5d955c61ad9e"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#aae5ebc6a53d1c2ac134b5d955c61ad9e">viennacl::ocl::setup_context</a> (long i, cl_context c, std::vector< cl_device_id > const &devices, std::vector< cl_command_queue > const &queues)</td></tr>
<tr class="memdesc:aae5ebc6a53d1c2ac134b5d955c61ad9e"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for setting up a context in ViennaCL from an existing OpenCL context. <a href="#aae5ebc6a53d1c2ac134b5d955c61ad9e">More...</a><br/></td></tr>
<tr class="separator:aae5ebc6a53d1c2ac134b5d955c61ad9e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a4ee09e7150e7158ac0e2fbfe21740138"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#a4ee09e7150e7158ac0e2fbfe21740138">viennacl::ocl::setup_context</a> (long i, cl_context c, cl_device_id d, cl_command_queue q)</td></tr>
<tr class="memdesc:a4ee09e7150e7158ac0e2fbfe21740138"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for setting up a context in ViennaCL from an existing OpenCL context. <a href="#a4ee09e7150e7158ac0e2fbfe21740138">More...</a><br/></td></tr>
<tr class="separator:a4ee09e7150e7158ac0e2fbfe21740138"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a11349d9bbd1691595c6ac23d03b294fd"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#a11349d9bbd1691595c6ac23d03b294fd">viennacl::ocl::set_context_device_type</a> (long i, cl_device_type dev_type)</td></tr>
<tr class="memdesc:a11349d9bbd1691595c6ac23d03b294fd"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for setting the default device type for a context. <a href="#a11349d9bbd1691595c6ac23d03b294fd">More...</a><br/></td></tr>
<tr class="separator:a11349d9bbd1691595c6ac23d03b294fd"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a0bda50e7a1d1ce32d0eb999bcf40ff65"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#a0bda50e7a1d1ce32d0eb999bcf40ff65">viennacl::ocl::set_context_device_type</a> (long i, <a class="el" href="structviennacl_1_1ocl_1_1gpu__tag.html">viennacl::ocl::gpu_tag</a>)</td></tr>
<tr class="memdesc:a0bda50e7a1d1ce32d0eb999bcf40ff65"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for setting the default device type for a context to GPUs. <a href="#a0bda50e7a1d1ce32d0eb999bcf40ff65">More...</a><br/></td></tr>
<tr class="separator:a0bda50e7a1d1ce32d0eb999bcf40ff65"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aae6d53d33250af634366a082eb389e1e"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#aae6d53d33250af634366a082eb389e1e">viennacl::ocl::set_context_device_type</a> (long i, <a class="el" href="structviennacl_1_1ocl_1_1cpu__tag.html">viennacl::ocl::cpu_tag</a>)</td></tr>
<tr class="memdesc:aae6d53d33250af634366a082eb389e1e"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for setting the default device type for a context to CPUs. <a href="#aae6d53d33250af634366a082eb389e1e">More...</a><br/></td></tr>
<tr class="separator:aae6d53d33250af634366a082eb389e1e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa55ca72f1d88e6366d9d7555d5fd3e3c"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#aa55ca72f1d88e6366d9d7555d5fd3e3c">viennacl::ocl::set_context_device_type</a> (long i, <a class="el" href="structviennacl_1_1ocl_1_1default__tag.html">viennacl::ocl::default_tag</a>)</td></tr>
<tr class="memdesc:aa55ca72f1d88e6366d9d7555d5fd3e3c"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for setting the default device type for a context to the default OpenCL device type. <a href="#aa55ca72f1d88e6366d9d7555d5fd3e3c">More...</a><br/></td></tr>
<tr class="separator:aa55ca72f1d88e6366d9d7555d5fd3e3c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a8eb7b871db32c1425afe547854885e83"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#a8eb7b871db32c1425afe547854885e83">viennacl::ocl::set_context_device_type</a> (long i, <a class="el" href="structviennacl_1_1ocl_1_1accelerator__tag.html">viennacl::ocl::accelerator_tag</a>)</td></tr>
<tr class="memdesc:a8eb7b871db32c1425afe547854885e83"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for setting the default device type for a context to accelerators. <a href="#a8eb7b871db32c1425afe547854885e83">More...</a><br/></td></tr>
<tr class="separator:a8eb7b871db32c1425afe547854885e83"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a2c46e1ed1f9449c4677af35ca173b106"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#a2c46e1ed1f9449c4677af35ca173b106">viennacl::ocl::set_context_device_num</a> (long i, vcl_size_t num)</td></tr>
<tr class="memdesc:a2c46e1ed1f9449c4677af35ca173b106"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for setting the number of default devices per context. <a href="#a2c46e1ed1f9449c4677af35ca173b106">More...</a><br/></td></tr>
<tr class="separator:a2c46e1ed1f9449c4677af35ca173b106"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aba4b534b1464fc21143f0c6aaae89a40"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#aba4b534b1464fc21143f0c6aaae89a40">viennacl::ocl::set_context_platform_index</a> (long i, vcl_size_t pf_index)</td></tr>
<tr class="memdesc:aba4b534b1464fc21143f0c6aaae89a40"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for setting the platform index. <a href="#aba4b534b1464fc21143f0c6aaae89a40">More...</a><br/></td></tr>
<tr class="separator:aba4b534b1464fc21143f0c6aaae89a40"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac7871671987d322a8766aea79b1cd17a"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classviennacl_1_1ocl_1_1command__queue.html">viennacl::ocl::command_queue</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#ac7871671987d322a8766aea79b1cd17a">viennacl::ocl::get_queue</a> ()</td></tr>
<tr class="memdesc:ac7871671987d322a8766aea79b1cd17a"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for getting the default queue for the currently active device in the active context. <a href="#ac7871671987d322a8766aea79b1cd17a">More...</a><br/></td></tr>
<tr class="separator:ac7871671987d322a8766aea79b1cd17a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a053c7351f8606ff49117e251683a77b4"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classviennacl_1_1ocl_1_1command__queue.html">viennacl::ocl::command_queue</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#a053c7351f8606ff49117e251683a77b4">viennacl::ocl::get_queue</a> (<a class="el" href="classviennacl_1_1ocl_1_1device.html">viennacl::ocl::device</a> d, unsigned int queue_id=0)</td></tr>
<tr class="memdesc:a053c7351f8606ff49117e251683a77b4"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for getting the queue for a particular device in the current active context. <a href="#a053c7351f8606ff49117e251683a77b4">More...</a><br/></td></tr>
<tr class="separator:a053c7351f8606ff49117e251683a77b4"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aaa732391e632ec192953cc997fa269df"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classviennacl_1_1ocl_1_1command__queue.html">viennacl::ocl::command_queue</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#aaa732391e632ec192953cc997fa269df">viennacl::ocl::get_queue</a> (cl_device_id dev_id, unsigned int queue_id=0)</td></tr>
<tr class="memdesc:aaa732391e632ec192953cc997fa269df"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for getting the queue for a particular device in the current active context. <a href="#aaa732391e632ec192953cc997fa269df">More...</a><br/></td></tr>
<tr class="separator:aaa732391e632ec192953cc997fa269df"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a61a73653d92f1eb2ef9c649ec253e29f"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classviennacl_1_1ocl_1_1kernel.html">viennacl::ocl::kernel</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#a61a73653d92f1eb2ef9c649ec253e29f">viennacl::ocl::get_kernel</a> (std::string const &prog_name, std::string const &kernel_name)</td></tr>
<tr class="memdesc:a61a73653d92f1eb2ef9c649ec253e29f"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for getting the kernel for a particular program from the current active context. <a href="#a61a73653d92f1eb2ef9c649ec253e29f">More...</a><br/></td></tr>
<tr class="separator:a61a73653d92f1eb2ef9c649ec253e29f"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac8bcead4c47a372eef33d7d660fa0072"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#ac8bcead4c47a372eef33d7d660fa0072">viennacl::ocl::switch_device</a> (<a class="el" href="classviennacl_1_1ocl_1_1device.html">viennacl::ocl::device</a> &d)</td></tr>
<tr class="memdesc:ac8bcead4c47a372eef33d7d660fa0072"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for switching the active device in the current context. <a href="#ac8bcead4c47a372eef33d7d660fa0072">More...</a><br/></td></tr>
<tr class="separator:ac8bcead4c47a372eef33d7d660fa0072"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac54d59a74deaccec81f64e738b856348"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classviennacl_1_1ocl_1_1device.html">viennacl::ocl::device</a> const & </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceviennacl_1_1ocl.html#ac54d59a74deaccec81f64e738b856348">viennacl::ocl::current_device</a> ()</td></tr>
<tr class="memdesc:ac54d59a74deaccec81f64e738b856348"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function for returning the active device in the current context. <a href="#ac54d59a74deaccec81f64e738b856348">More...</a><br/></td></tr>
<tr class="separator:ac54d59a74deaccec81f64e738b856348"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Implementations of the OpenCL backend, where all contexts are stored in. </p>
<p>Definition in file <a class="el" href="backend_8hpp_source.html">backend.hpp</a>.</p>
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