ceph/src/boost/libs/compute/include/boost/compute/svm.hpp

   1 //---------------------------------------------------------------------------//
   2 // Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
   3 //
   4 // Distributed under the Boost Software License, Version 1.0
   5 // See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt
   7 //
   8 // See http://boostorg.github.com/compute for more information.
   9 //---------------------------------------------------------------------------//
  10
  11 #ifndef BOOST_COMPUTE_SVM_HPP
  12 #define BOOST_COMPUTE_SVM_HPP
  13
  14 #include <boost/compute/config.hpp>
  15 #include <boost/compute/context.hpp>
  16 #include <boost/compute/memory/svm_ptr.hpp>
  17
  18 // svm functions require OpenCL 2.0
  19 #if defined(CL_VERSION_2_0) || defined(BOOST_COMPUTE_DOXYGEN_INVOKED)
  20
  21 namespace boost {
  22 namespace compute {
  23
  24 /// Allocates a shared virtual memory (SVM) buffer.
  25 //
  26 /// \opencl_version_warning{2,0}
  27 ///
  28 /// \see_opencl2_ref{clSVMAlloc}
  29 ///
  30 /// \see svm_free()
  31 template<class T>
  32 inline svm_ptr<T> svm_alloc(const context &context,
  33                             size_t size,
  34                             cl_svm_mem_flags flags = CL_MEM_READ_WRITE,
  35                             unsigned int alignment = 0)
  36 {
  37     svm_ptr<T> ptr(
  38         clSVMAlloc(context.get(), flags, size * sizeof(T), alignment),
  39         context
  40     );
  41     if(!ptr.get()){
  42         BOOST_THROW_EXCEPTION(opencl_error(CL_MEM_OBJECT_ALLOCATION_FAILURE));
  43     }
  44     return ptr;
  45 }
  46
  47 /// Deallocates a shared virtual memory (SVM) buffer.
  48 ///
  49 /// \opencl_version_warning{2,0}
  50 ///
  51 /// \see_opencl2_ref{clSVMFree}
  52 ///
  53 /// \see svm_alloc(), command_queue::enqueue_svm_free()
  54 template<class T>
  55 inline void svm_free(svm_ptr<T> ptr)
  56 {
  57     clSVMFree(ptr.get_context(), ptr.get());
  58 }
  59
  60 /// \overload
  61 template<class T>
  62 inline void svm_free(const context &context, svm_ptr<T> ptr)
  63 {
  64     clSVMFree(context.get(), ptr.get());
  65 }
  66
  67 } // end compute namespace
  68 } // end boost namespace
  69
  70 #endif // CL_VERSION_2_0
  71
  72 #endif // BOOST_COMPUTE_PIPE_HPP