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// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
// Copyright 2008-2016 National ICT Australia (NICTA)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------
//! \addtogroup mp_misc
//! @{
template<typename eT, const bool use_smaller_thresh = false>
struct mp_gate
{
arma_inline
static
bool
eval(const uword n_elem)
{
#if defined(ARMA_USE_OPENMP)
{
const bool length_ok = (is_cx<eT>::yes || use_smaller_thresh) ? (n_elem >= (arma_config::mp_threshold/uword(2))) : (n_elem >= arma_config::mp_threshold);
if(length_ok)
{
if(omp_in_parallel()) { return false; }
}
return length_ok;
}
#else
{
arma_ignore(n_elem);
return false;
}
#endif
}
};
struct mp_thread_limit
{
arma_inline
static
int
get()
{
#if defined(ARMA_USE_OPENMP)
int n_threads = (std::min)(int(arma_config::mp_threads), int((std::max)(int(1), int(omp_get_max_threads()))));
#else
int n_threads = int(1);
#endif
return n_threads;
}
arma_inline
static
bool
in_parallel()
{
#if defined(ARMA_USE_OPENMP)
{
return bool(omp_in_parallel());
}
#else
{
return false;
}
#endif
}
};
//! @}
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