c++ 11 之后有了标准的线程库：
#include
#include
std::thread::id main_thread_id = std::this_thread::get_id();
void hello()
{
std::cout <<"Hello Concurrent World\n";
if(main_thread_id == std::this_thread::get_id())
std::cout <<"This is the main thread.\n";
else
std::cout <<"This is not the main thread.\n";
}
void pause_thread(int n){
std::this_thread::sleep_for(std::chrono::seconds(n));
std::cout <<"pause of "<< n <<" seconds ended\n";
}
int main(){
std::thread t(hello);
std::cout << t.hardware_concurrency()<< std::endl;//可以并发执行多少个(不准确)
std::cout <<"native_handle "<< t.native_handle()<< std::endl;//可以并发执行多少个(不准确)
t.join();
std::thread a(hello);
a.detach();
std::thread threads[5]; // 默认构造线程
std::cout <<"Spawning 5 threads...\n";
for(int i =0; i <5;++i)
threads[i]= std::thread(pause_thread, i +1); // move-assign threads
std::cout <<"Done spawning threads. Now waiting for them to join:\n";
for(auto&thread : threads)
thread.join();
std::cout <<"All threads joined!\n";
}
之前一些编译器使用 C++11 的编译参数是 -std=c++11
g++-std=c++11 test.cpp -lpthread
