std::jthread::native_handle
来自cppreference.com
[[nodiscard]] native_handle_type native_handle(); |
(C++20 起) (可选) |
|
返回实现定义的底层线程柄。
参数
(无)
返回值
表示线程的实现定义柄类型。
异常
可能抛出实现定义的异常。
示例
在 POSIX 系统上用 native_handle
启用 C++ 线程的实时调度
运行此代码
#include <thread> #include <mutex> #include <iostream> #include <chrono> #include <cstring> #include <pthread.h> std::mutex iomutex; void f(int num) { std::this_thread::sleep_for(std::chrono::seconds(1)); sched_param sch; int policy; pthread_getschedparam(pthread_self(), &policy, &sch); std::lock_guard<std::mutex> lk(iomutex); std::cout << "Thread " << num << " is executing at priority " << sch.sched_priority << '\n'; } int main() { std::jthread t1(f, 1), t2(f, 2); sched_param sch; int policy; pthread_getschedparam(t1.native_handle(), &policy, &sch); sch.sched_priority = 20; if (pthread_setschedparam(t1.native_handle(), SCHED_FIFO, &sch)) { std::cout << "Failed to setschedparam: " << std::strerror(errno) << '\n'; } }
输出:
Thread 2 is executing at priority 0 Thread 1 is executing at priority 20