Example
std::this_thread is a namespace which has functions to do interesting things on the current thread from function it is called from.
| Function | Description |
|---|---|
get_id | Returns the id of the thread |
sleep_for | Sleeps for a specified amount of time |
sleep_until | Sleeps until a specific time |
yield | Reschedule running threads, giving other threads priority |
Getting the current threads id using std::this_thread::get_id:
void foo()
{
//Print this threads id
std::cout << std::this_thread::get_id() << '\n';
}
std::thread thread{ foo };
thread.join(); //'threads' id has now been printed, should be something like 12556
foo(); //The id of the main thread is printed, should be something like 2420
Sleeping for 3 seconds using std::this_thread::sleep_for:
void foo()
{
std::this_thread::sleep_for(std::chrono::seconds(3));
}
std::thread thread{ foo };
foo.join();
std::cout << "Waited for 3 seconds!\n";
Sleeping until 3 hours in the future using std::this_thread::sleep_until:
void foo()
{
std::this_thread::sleep_until(std::chrono::system_clock::now() + std::chrono::hours(3));
}
std::thread thread{ foo };
thread.join();
std::cout << "We are now located 3 hours after the thread has been called\n";
Letting other threads take priority using std::this_thread::yield:
void foo(int a)
{
for (int i = 0; i < al ++i)
std::this_thread::yield(); //Now other threads take priority, because this thread
//isn't doing anything important
std::cout << "Hello World!\n";
}
std::thread thread{ foo, 10 };
thread.join();
