commit | 64330b568e645fb947c116344258d0976a844ab4 | [log] [tgz] |
---|---|---|
author | Louis Dionne <ldionne@apple.com> | Thu Apr 18 18:20:19 2019 +0000 |
committer | Copybara-Service <copybara-worker@google.com> | Tue Sep 01 14:42:08 2020 -0700 |
tree | 6e5b8484e930c71ee76391264a718b14c58adf46 | |
parent | 5648bf64fb20add6b41a3499b7e03a926dfd1db3 [diff] |
[pstl] Add a serial backend for the PSTL Summary: The serial backend performs all tasks serially and does not require threads. It does not have any dependencies beyond normal C++, but it is not very efficient either. Reviewers: rodgert, MikeDvorskiy Subscribers: mgorny, jkorous, dexonsmith, jdoerfert, libcxx-commits Differential Revision: https://reviews.llvm.org/D59791 llvm-svn: 358700 GitOrigin-RevId: dcf4b9aee06a0fe8aed9b2b86a24761cb23e2c10
Parallel STL is an implementation of the C++ standard library algorithms with support for execution policies, as specified in ISO/IEC 14882:2017 standard, commonly called C++17. The implementation also supports the unsequenced execution policy specified in Parallelism TS version 2 and proposed for the next version of the C++ standard in the C++ working group paper P1001. Parallel STL offers efficient support for both parallel and vectorized execution of algorithms. For sequential execution, it relies on an available implementation of the C++ standard library.
To use Parallel STL, you must have the following software installed:
unseq
and par_unseq
policies only have effect with compilers that support #pragma omp simd
or #pragma simd
.includes
, inplace_merge
, merge
, nth_element
, partial_sort
, partial_sort_copy
, set_difference
, set_intersection
, set_symmetric_difference
, set_union
, sort
, stable_partition
, stable_sort
, unique
.exclusive_scan
, inclusive_scan
, transform_exclusive_scan
, transform_inclusive_scan
shall be DefaultConstructible. A default constructed-instance of the initial value type shall be the identity element for the specified binary operation.max_element
, min_element
, minmax_element
, partial_sort
, partial_sort_copy
, sort
, stable_sort
the dereferenced value type of the provided iterators shall be DefaultConstructible.remove
, remove_if
, unique
the dereferenced value type of the provided iterators shall be MoveConstructible.copy_if
, inplace_merge
, partial_sort
, partial_sort_copy
, partition_copy
, remove
, remove_if
, rotate
, sort
, stable_sort
, unique
, unique_copy
.