
/*
//@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
*/

#include<openmp/TestOpenMP_Category.hpp>
#include<TestTemplateMetaFunctions.hpp>
#include<TestAggregate.hpp>
#include<TestMemoryPool.hpp>
#include<TestCXX11.hpp>
#include<TestTile.hpp>

#include<TestViewCtorPropEmbeddedDim.hpp>

#include <mutex>

namespace Test {

TEST_F( openmp, partition_master )
{
  using Mutex = Kokkos::Experimental::MasterLock<Kokkos::OpenMP>;

  Mutex mtx;
  int errors = 0;

  auto master = [&errors, &mtx](int partition_id, int num_partitions) {

    const int pool_size = Kokkos::OpenMP::thread_pool_size();

    {
      std::unique_lock<Mutex> lock(mtx);
      if ( Kokkos::OpenMP::in_parallel() ) {
        ++errors;
      }
      if ( Kokkos::OpenMP::thread_pool_rank() != 0 ) {
        ++errors;
      }
    }

    {
      int local_errors = 0;
      Kokkos::parallel_reduce( Kokkos::RangePolicy<Kokkos::OpenMP>(0,1000)
                           , [pool_size]( const int , int & errs ) {
          if ( Kokkos::OpenMP::thread_pool_size() != pool_size ) {
            ++errs;
          }
        }
        , local_errors
      );
      Kokkos::atomic_add( &errors, local_errors );
    }

    Kokkos::Experimental::UniqueToken< Kokkos::OpenMP > token;

    Kokkos::View<int*, Kokkos::OpenMP> count( "",  token.size() );

    Kokkos::parallel_for( Kokkos::RangePolicy<Kokkos::OpenMP>(0,1000),
        [=] ( const int ) {
      int i = token.acquire();
      ++count[i];
      token.release(i);
    });

    Kokkos::View<int,Kokkos::OpenMP> sum ("");
    Kokkos::parallel_for( Kokkos::RangePolicy<Kokkos::OpenMP>(0,token.size()),
        [=] ( const int i ) {
      Kokkos::atomic_add( sum.data(), count[i] );
    });

    if (sum() != 1000) {
      Kokkos::atomic_add( &errors, 1 );
    }
  };

  master(0,1);

  ASSERT_EQ( errors, 0 );

  Kokkos::OpenMP::partition_master( master );
  ASSERT_EQ( errors, 0 );

  Kokkos::OpenMP::partition_master( master, 4, 0 );
  ASSERT_EQ( errors, 0 );

  Kokkos::OpenMP::partition_master( master, 0, 4 );
  ASSERT_EQ( errors, 0 );

  Kokkos::OpenMP::partition_master( master, 2, 2 );
  ASSERT_EQ( errors, 0 );

  Kokkos::OpenMP::partition_master( master, 8, 0 );
  ASSERT_EQ( errors, 0 );

  Kokkos::OpenMP::partition_master( master, 0, 8 );
  ASSERT_EQ( errors, 0 );

  Kokkos::OpenMP::partition_master( master, 8, 8 );
  ASSERT_EQ( errors, 0 );
}

} // namespace Test
