1 | /* |
2 | * Copyright 2014-present Facebook, Inc. |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
5 | * you may not use this file except in compliance with the License. |
6 | * You may obtain a copy of the License at |
7 | * |
8 | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | * |
10 | * Unless required by applicable law or agreed to in writing, software |
11 | * distributed under the License is distributed on an "AS IS" BASIS, |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
13 | * See the License for the specific language governing permissions and |
14 | * limitations under the License. |
15 | */ |
16 | |
17 | #pragma once |
18 | #define FOLLY_GEN_PARALLELMAP_H_ |
19 | |
20 | #include <folly/gen/Core.h> |
21 | |
22 | namespace folly { |
23 | namespace gen { |
24 | |
25 | namespace detail { |
26 | |
27 | template <class Predicate> |
28 | class PMap; |
29 | |
30 | } // namespace detail |
31 | |
32 | /** |
33 | * Run `pred` in parallel in nThreads. Results are returned in the |
34 | * same order in which they were retrieved from the source generator |
35 | * (similar to map). |
36 | * |
37 | * NOTE: Only `pred` is run from separate threads; the source |
38 | * generator and the rest of the pipeline is executed in the |
39 | * caller thread. |
40 | */ |
41 | template <class Predicate, class PMap = detail::PMap<Predicate>> |
42 | PMap pmap(Predicate pred = Predicate(), size_t nThreads = 0) { |
43 | return PMap(std::move(pred), nThreads); |
44 | } |
45 | } // namespace gen |
46 | } // namespace folly |
47 | |
48 | #include <folly/gen/ParallelMap-inl.h> |
49 | |