void detach(); | (since C++11) |
Separates the thread of execution from the thread object, allowing execution to continue independently. Any allocated resources will be freed once the thread exits.
After calling detach *this no longer owns any thread.
Parameters
(none).
Return value
(none).
Postconditions
joinable is false.
Exceptions
std::system_error if joinable() == false or an error occurs.
Example
#include <iostream>
#include <chrono>
#include <thread>
void independentThread()
{
std::cout << "Starting concurrent thread.\n";
std::this_thread::sleep_for(std::chrono::seconds(2));
std::cout << "Exiting concurrent thread.\n";
}
void threadCaller()
{
std::cout << "Starting thread caller.\n";
std::thread t(independentThread);
t.detach();
std::this_thread::sleep_for(std::chrono::seconds(1));
std::cout << "Exiting thread caller.\n";
}
int main()
{
threadCaller();
std::this_thread::sleep_for(std::chrono::seconds(5));
}Possible output:
Starting thread caller. Starting concurrent thread. Exiting thread caller. Exiting concurrent thread.
See also
| waits for a thread to finish its execution (public member function) | |
| checks whether the thread is joinable, i.e. potentially running in parallel context (public member function) |
References
- C++11 standard (ISO/IEC 14882:2011):
- 30.3.1.5 thread members [thread.thread.member]
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