std::execution::seq, std::execution::par, std::execution::par_unseq, std::execution::unseq
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Defined in header
<execution> |
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inline constexpr std::execution::sequenced_policy seq { /* unspecified */ };
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(since C++17) | |
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inline constexpr std::execution::parallel_policy par { /* unspecified */ };
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(since C++17) | |
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inline constexpr std::execution::parallel_unsequenced_policy par_unseq { /* unspecified */ };
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(since C++17) | |
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inline constexpr std::execution::unsequenced_policy unseq { /* unspecified */ };
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(since C++20) | |
std::execution::seq, std::execution::par, std::execution::par_unseq, and std::execution::unseq are instances of the execution policy types std::execution::sequenced_policy, std::execution::parallel_policy, std::execution::parallel_unsequenced_policy, and std::execution::unsequenced_policy respectively. They are used to specify the execution policy of parallel algorithms - i.e., the kinds of parallelism allowed.
Additional execution policies may be provided by a standard library implementation (possible future additions may include std::parallel::cuda and std::parallel::opencl)
See also
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(C++17)(C++17)(C++17)(C++20)
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execution policy types (class) |