Thread support

Thread support
c Standard library ：
c The standard library does not have thread support , Use platform native functions ：
windows:CreateThread
unix:pthread_create In fact, threads are simulated by processes .
c++ Standard library

operator= Only right values are supported as parameters , The use of move The original thread object is changed to non joinable
get_id Get thread id
joinable Check whether the thread can wait , Empty thread Objects are not waiting .
join Wait for thread execution to complete .
detach Separate the thread object from the thread , here thread Object does not represent a thread , The thread continues to execute .
swap In exchange for
native_handle Get the thread handle of the native platform .

this_thread：
get_id Gets the current thread's id
yield Discard the time slice of the current thread amount to sleep(0)
sleep_until: Sleep
sleep_for： Sleep

Find... From above thread It has been executed since its creation , No, start、stop、pause、resume Such behavior .
Example ：

// thread example
#include <iostream> // std::cout
#include <thread> // std::thread

void foo()
{
    
  // do stuff...
}

void bar(int x)
{
    
  // do stuff...
}

int main()
{
    
  std::thread first (foo);     // spawn new thread that calls foo()
  std::thread second (bar,0);  // spawn new thread that calls bar(0)

  std::cout << "main, foo and bar now execute concurrently...\n";

  // synchronize threads:
  first.join();                // pauses until first finishes
  second.join();               // pauses until second finishes

  std::cout << "foo and bar completed.\n";

  return 0;
}

boost library ：
See ：
<boost/thread/thread.hpp>