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std::packaged_task::reset(3) C++ Standard Libary std::packaged_task::reset(3) NAME std::packaged_task::reset - std::packaged_task::reset Synopsis void reset(); (since C++11) Resets the state abandoning the results of previous executions. New shared state is constructed. Equivalent to *this = packaged_task(std::move(f)), where f is the stored task. Parameters (none) Return value (none) Exceptions * std::future_error if *this has no shared state. The error condi- tion is set to no_state. * std::bad_alloc if there was not enough memory for a new shared state. * any exception thrown by the move constructor of the new pack- aged_task Example // Run this code #include <iostream> #include <cmath> #include <thread> #include <future> int main() { std::packaged_task<int(int,int)> task([](int a, int b) { return std::pow(a, b); }); std::future<int> result = task.get_future(); task(2, 9); std::cout << "2^9 = " << result.get() << '\n'; task.reset(); result = task.get_future(); std::thread task_td(std::move(task), 2, 10); task_td.join(); std::cout << "2^10 = " << result.get() << '\n'; } Output: 2^9 = 512 2^10 = 1024 http://cppreference.com 2022.07.31 std::packaged_task::reset(3)
NAME | Synopsis | Parameters | Return value | Exceptions | Example | Output:
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