void join(); | (since C++11) |
Blocks the current thread until the thread identified by *this finishes its execution.
(none).
(none).
joinable is false.
std::system_error if an error occurs.
resource_deadlock_would_occur if this->get_id() == std::this_thread::get_id() (deadlock detected) no_such_process if the thread is not valid invalid_argument if joinable is false #include <iostream>
#include <thread>
#include <chrono>
void foo()
{
// simulate expensive operation
std::this_thread::sleep_for(std::chrono::seconds(1));
}
void bar()
{
// simulate expensive operation
std::this_thread::sleep_for(std::chrono::seconds(1));
}
int main()
{
std::cout << "starting first helper...\n";
std::thread helper1(foo);
std::cout << "starting second helper...\n";
std::thread helper2(bar);
std::cout << "waiting for helpers to finish..." << std::endl;
helper1.join();
helper2.join();
std::cout << "done!\n";
}Output:
starting first helper... starting second helper... waiting for helpers to finish... done!
| permits the thread to execute independently from the thread handle (public member function) |
|
| checks whether the thread is joinable, i.e. potentially running in parallel context (public member function) |
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