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94 lines
2.5 KiB
94 lines
2.5 KiB
11 years ago
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/*
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* Copyright 2008-2012 NVIDIA Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <thrust/detail/config.h>
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#include <thrust/system/cuda/detail/execution_policy.h>
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#include <thrust/system/cuda/detail/assign_value.h>
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#include <thrust/detail/raw_pointer_cast.h>
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#include <thrust/iterator/iterator_traits.h>
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namespace thrust
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{
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namespace system
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{
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namespace cuda
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{
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namespace detail
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{
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namespace
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{
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template<typename DerivedPolicy, typename Pointer>
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inline __host__ __device__
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typename thrust::iterator_value<Pointer>::type
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get_value_msvc2005_war(execution_policy<DerivedPolicy> &exec, Pointer ptr)
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{
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typedef typename thrust::iterator_value<Pointer>::type result_type;
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// XXX war nvbugs/881631
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struct war_nvbugs_881631
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{
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__host__ inline static result_type host_path(execution_policy<DerivedPolicy> &exec, Pointer ptr)
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{
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// when called from host code, implement with assign_value
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// note that this requires a type with default constructor
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result_type result;
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thrust::host_system_tag host_tag;
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cross_system<thrust::host_system_tag, DerivedPolicy> systems(host_tag, exec);
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assign_value(systems, &result, ptr);
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return result;
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}
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__device__ inline static result_type device_path(execution_policy<DerivedPolicy> &, Pointer ptr)
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{
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// when called from device code, just do simple deref
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return *thrust::raw_pointer_cast(ptr);
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}
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};
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#ifndef __CUDA_ARCH__
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return war_nvbugs_881631::host_path(exec, ptr);
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#else
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return war_nvbugs_881631::device_path(exec, ptr);
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#endif // __CUDA_ARCH__
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} // end get_value_msvc2005_war()
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} // end anon namespace
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template<typename DerivedPolicy, typename Pointer>
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inline __host__ __device__
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typename thrust::iterator_value<Pointer>::type
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get_value(execution_policy<DerivedPolicy> &exec, Pointer ptr)
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{
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return get_value_msvc2005_war(exec,ptr);
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} // end get_value()
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} // end detail
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} // end cuda
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} // end system
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} // end thrust
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