text: /*
   * Copyright 2015 Facebook, Inc.
   *
   * 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.
   */
  
  #ifndef FOLLY_GEN_PARALLELMAP_H
  #define FOLLY_GEN_PARALLELMAP_H
  
  #include <folly/gen/Core.h>
  
  namespace folly { namespace gen {
  
  namespace detail {
  
  template<class Predicate>
  class PMap;
  
  }  // namespace detail
  
  /**
   * Run `pred` in parallel in nThreads. Results are returned in the
   * same order in which they were retrieved from the source generator
   * (similar to map).
   *
   * NOTE: Only `pred` is run from separate threads; the source
   *       generator and the rest of the pipeline is executed in the
   *       caller thread.
   */
  template<class Predicate,
           class PMap = detail::PMap<Predicate>>
    PMap pmap(Predicate pred = Predicate(), size_t nThreads = 0) {
    return PMap(std::move(pred), nThreads);
  }
  
  }}  // namespaces
  
  #include <folly/gen/ParallelMap-inl.h>
  
  #endif  // FOLLY_GEN_PARALLELMAP_H
  