std::execution::seq, std::execution::par, std::execution::par_unseq, std::execution::unseq

 

C++

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自立与有宿主实现

具名要求

语言支持库

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诊断库

工具库

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容器库

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文件系统库 (C++17)

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技术规范

 

算法库

受约束算法及范围上的算法 (C++20)
受约束算法： std::ranges::copy, std::ranges::sort, ...
执行策略 (C++17)
is_execution_policy (C++17)	execution::seqexecution::parexecution::par_unseqexecution::unseq (C++17)(C++17)(C++17)(C++20)	execution::sequenced_policyexecution::parallel_policyexecution::parallel_unsequenced_policyexecution::parallel_unsequenced (C++17)(C++17)(C++17)(C++20)
不修改序列的操作
all_ofany_ofnone_of (C++11)(C++11)(C++11) for_each for_each_n (C++17)	countcount_if mismatch equal adjacent_find	findfind_iffind_if_not (C++11) find_end find_first_of	adjacent_find search search_n lexicographical_compare lexicographical_compare_three_way (C++20)
修改序列的操作
copycopy_if (C++11) copy_n (C++11) copy_backward move (C++11) move_backward (C++11) shift_leftshift_right (C++20)(C++20) transform	fill fill_n generate generate_n swap iter_swap swap_ranges sample (C++17)	removeremove_if replacereplace_if reverse rotate unique random_shuffle (C++17 前)	remove_copyremove_copy_if replace_copyreplace_copy_if reverse_copy rotate_copy unique_copy shuffle (C++11)
未初始化存储上的操作
uninitialized_copy uninitialized_move (C++17) uninitialized_fill destroy (C++17)	uninitialized_copy_n (C++11) uninitialized_move_n (C++17) uninitialized_fill_n destroy_n (C++17)	uninitialized_default_construct (C++17) uninitialized_value_construct (C++17) destroy_at (C++17)	uninitialized_default_construct_n (C++17) uninitialized_value_construct_n (C++17) construct_at (C++20)
划分操作
is_partitioned (C++11) partition_point (C++11)	partition partition_copy (C++11)	stable_partition
排序操作
is_sorted (C++11) is_sorted_until (C++11)	sort stable_sort	partial_sort partial_sort_copy	nth_element
二分搜索操作
lower_bound	upper_bound	binary_search	equal_range
集合操作（在已排序范围上）
merge inplace_merge	set_difference set_intersection	set_symmetric_difference set_union	includes
堆操作
is_heap (C++11) is_heap_until (C++11)	make_heap sort_heap	push_heap pop_heap
最小/最大操作
max max_element	min min_element	minmax (C++11) minmax_element (C++11)	clamp (C++17)
排列
is_permutation (C++11)	next_permutation	prev_permutation
数值运算
iota (C++11) inner_product adjacent_difference	accumulate reduce (C++17) transform_reduce (C++17)	partial_sum inclusive_scan (C++17) exclusive_scan (C++17)	transform_inclusive_scan (C++17) transform_exclusive_scan (C++17)
C 库
qsort	bsearch

 

定义于头文件 <execution>
inline constexpr std::execution::sequenced_policy seq { /* unspecified */ };		(C++17 起)
inline constexpr std::execution::parallel_policy par { /* unspecified */ };		(C++17 起)
inline constexpr std::execution::parallel_unsequenced_policy par_unseq { /* unspecified */ };		(C++17 起)
inline constexpr std::execution::unsequenced_policy unseq { /* unspecified */ };		(C++20 起)

std::execution::seq 、 std::execution::par 、 std::execution::par_unseq 及 std::execution::unseq 分别是执行策略类型 std::execution::sequenced_policy 、 std::execution::parallel_policy 、 std::execution::parallel_unsequenced_policy 与 std::execution::unsequenced_policy 的实例。它们用于指定并行算法的执行策略——即允许的并行类型。

标准库的实现可以提供附加的执行策略。（可能的未来额外策略包含 std::parallel::cuda 和 std::parallel::opencl ）

参阅

sequenced_policyparallel_policyparallel_unsequenced_policyunsequenced_policy (C++17)(C++17)(C++17)(C++20)

执行策略类型 (类)