Extensions for parallelism, version 2

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Metaprogramming library (C++11)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Concurrency support library (C++11)

Execution support library (C++26)

Technical specifications

Symbols index

External libraries

 

Experimental

Technical Specification

Filesystem library (filesystem TS)

Library fundamentals (library fundamentals TS)

Library fundamentals 2 (library fundamentals TS v2)

Library fundamentals 3 (library fundamentals TS v3)

Extensions for parallelism (parallelism TS)

Extensions for parallelism 2 (parallelism TS v2)

Extensions for concurrency (concurrency TS)

Extensions for concurrency 2 (concurrency TS v2)

Concepts (concepts TS)

Ranges (ranges TS)

Reflection (reflection TS)

Mathematical special functions (special functions TR)

Experimental Non-TS

Pattern Matching

Linear Algebra

std::execution

Contracts

2D Graphics

 

Extensions for parallelism v2

Parallel exceptions
exception_list
Additional execution policies
execution::vector_policy	execution::unsequenced_policy
Algorithms
induction reductionreduction_plusreduction_minusreduction_multiplies	reduction_bit_andreduction_bit_orreduction_bit_xorreduction_minreduction_max	for_loopfor_loop_stridedfor_loop_nfor_loop_n_strided
execution::no_vec
execution::ordered_update_t
Task blocks
task_block
task_cancelled_exception
define_task_blockdefine_task_block_restore_thread
Data-parallel vectors

 

The C++ Extensions for Parallelism Version 2, ISO/IEC TS 19570:2018 defines the following new components for the C++ standard library:

Parallel exceptions

Defined in header <experimental/exception_list>
exception_list	exceptions raised during parallel executions (class)

Execution policies

Defined in header <experimental/execution_policy>
unsequenced_policyvector_policy	execution policy types (class)
unseqvec	global execution policy objects (constant)

Data-Parallel Types

simd (parallelism TS v2)	data-parallel vector type (class template)
simd_mask (parallelism TS v2)	data-parallel type with the element type bool (class template)

Feature test macros

Defined in header <experimental/task_block>
__cpp_lib_experimental_parallel_task_block	a value of at least 201711 indicates that the task block functionality is supported (macro constant)
Defined in header <experimental/execution>
__cpp_lib_experimental_execution_vector_policy	a value of at least 201711 indicates that the vector and wavefront policies are supported (macro constant)
Defined in header <experimental/algorithm>
__cpp_lib_experimental_parallel_for_loop	a value of at least 201711 indicates that the for_loop class of algorithms is supported (macro constant)
Defined in header <experimental/simd>
__cpp_lib_experimental_parallel_simd	a value of at least 201803 indicates that the data-parallel types library is supported (macro constant)