bool joinable() const; | (since C++11) |
Checks if the thread object identifies an active thread of execution. Specifically, returns true
if get_id() != std::thread::id()
. So a default constructed thread
is not joinable.
A thread that has finished executing code, but has not yet been joined is still considered an active thread of execution and is therefore joinable.
(none).
true
if the thread object identifies an active thread of execution, false
otherwise.
noexcept
specification: noexcept
#include <iostream> #include <thread> #include <chrono> void foo() { std::this_thread::sleep_for(std::chrono::seconds(1)); } int main() { std::thread t; std::cout << "before starting, joinable: " << t.joinable() << '\n'; t = std::thread(foo); std::cout << "after starting, joinable: " << t.joinable() << '\n'; t.join(); std::cout << "after joining, joinable: " << t.joinable() << '\n'; }
Output:
before starting, joinable: 0 after starting, joinable: 1 after joining, joinable: 0
(C++11) | returns the id of the thread (public member function) |
waits for a thread to finish its execution (public member function) |
|
permits the thread to execute independently from the thread handle (public member function) |
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