/usr/include/viennacl/context.hpp is in libviennacl-dev 1.7.1+dfsg1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | #ifndef VIENNACL_CONTEXT_HPP_
#define VIENNACL_CONTEXT_HPP_
/* =========================================================================
Copyright (c) 2010-2016, Institute for Microelectronics,
Institute for Analysis and Scientific Computing,
TU Wien.
Portions of this software are copyright by UChicago Argonne, LLC.
-----------------
ViennaCL - The Vienna Computing Library
-----------------
Project Head: Karl Rupp rupp@iue.tuwien.ac.at
(A list of authors and contributors can be found in the manual)
License: MIT (X11), see file LICENSE in the base directory
============================================================================= */
/** @file viennacl/context.hpp
@brief Implementation of a OpenCL-like context, which serves as a unification of {OpenMP, CUDA, OpenCL} at the user API.
*/
#include <vector>
#include <stddef.h>
#include <assert.h>
#include "viennacl/forwards.h"
#include "viennacl/ocl/forwards.h"
#include "viennacl/backend/mem_handle.hpp"
namespace viennacl
{
/** @brief Represents a generic 'context' similar to an OpenCL context, but is backend-agnostic and thus also suitable for CUDA and OpenMP
*
* Context objects are used to distinguish between different memory domains. One context may refer to an OpenCL device, another context may refer to a CUDA device, and a third context to main RAM.
* Thus, operations are only defined on objects residing on the same context.
*/
class context
{
public:
context() : mem_type_(viennacl::backend::default_memory_type())
{
#ifdef VIENNACL_WITH_OPENCL
if (mem_type_ == OPENCL_MEMORY)
ocl_context_ptr_ = &viennacl::ocl::current_context();
else
ocl_context_ptr_ = NULL;
#endif
}
explicit context(viennacl::memory_types mtype) : mem_type_(mtype)
{
if (mem_type_ == MEMORY_NOT_INITIALIZED)
mem_type_ = viennacl::backend::default_memory_type();
#ifdef VIENNACL_WITH_OPENCL
if (mem_type_ == OPENCL_MEMORY)
ocl_context_ptr_ = &viennacl::ocl::current_context();
else
ocl_context_ptr_ = NULL;
#endif
}
#ifdef VIENNACL_WITH_OPENCL
context(viennacl::ocl::context const & ctx) : mem_type_(OPENCL_MEMORY), ocl_context_ptr_(&ctx) {}
viennacl::ocl::context const & opencl_context() const
{
assert(mem_type_ == OPENCL_MEMORY && bool("Context type is not OpenCL"));
return *ocl_context_ptr_;
}
#endif
// TODO: Add CUDA and OpenMP contexts
viennacl::memory_types memory_type() const { return mem_type_; }
private:
viennacl::memory_types mem_type_;
#ifdef VIENNACL_WITH_OPENCL
viennacl::ocl::context const * ocl_context_ptr_;
#endif
};
}
#endif
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