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lammps/lib/kokkos/core/src/Threads/Kokkos_Threads_WorkGraphPolicy.hpp
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Kokkos_Threads_WorkGraphPolicy.hpp
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/*
//@HEADER
// ************************************************************************
//
// Kokkos v. 2.0
// Copyright (2014) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact H. Carter Edwards (hcedwar@sandia.gov)
//
// ************************************************************************
//@HEADER
*/
#ifndef KOKKOS_THREADS_WORKGRAPHPOLICY_HPP
#define KOKKOS_THREADS_WORKGRAPHPOLICY_HPP
namespace Kokkos {
namespace Impl {
template< class FunctorType , class ... Traits >
class ParallelFor< FunctorType ,
Kokkos::Experimental::WorkGraphPolicy< Traits ... > ,
Kokkos::Threads
>
: public Kokkos::Impl::Experimental::
WorkGraphExec< FunctorType,
Kokkos::Threads,
Traits ...
>
{
private:
typedef Kokkos::Experimental::WorkGraphPolicy< Traits ... > Policy ;
typedef Kokkos::Impl::Experimental::
WorkGraphExec<FunctorType, Kokkos::Threads, Traits ... > Base ;
typedef ParallelFor<FunctorType,
Kokkos::Experimental::WorkGraphPolicy<Traits ...>,
Kokkos::Threads> Self ;
template< class TagType >
typename std::enable_if< std::is_same< TagType , void >::value >::type
exec_one(const typename Policy::member_type& i) const {
Base::m_functor( i );
}
template< class TagType >
typename std::enable_if< ! std::is_same< TagType , void >::value >::type
exec_one(const typename Policy::member_type& i) const {
const TagType t{} ;
Base::m_functor( t , i );
}
inline void exec_one_thread() const {
for (std::int32_t i; (-1 != (i = Base::before_work())); ) {
exec_one< typename Policy::work_tag >( i );
Base::after_work(i);
}
}
static inline void thread_main( ThreadsExec&, const void* arg ) {
const Self& self = *(static_cast<const Self*>(arg));
self.exec_one_thread();
}
public:
inline
void execute()
{
ThreadsExec::start( & Self::thread_main, this );
ThreadsExec::fence();
}
inline
ParallelFor( const FunctorType & arg_functor
, const Policy & arg_policy )
: Base( arg_functor, arg_policy )
{
}
};
} // namespace Impl
} // namespace Kokkos
#endif /* #define KOKKOS_THREADS_WORKGRAPHPOLICY_HPP */
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