C++11 Multithreading series The first part

Multithreaded programming for large programs, complex algorithms are widely used, has been developed under Windows, but the program needs to run in Linux and other systems, configuration boost standard library is also a solution, C++11 standard library implementation time is relatively long, most of the compiler today support, Therefore, using C++11 to achieve multithreading is undoubtedly the best choice.

According to Wikipedia: threads are the smallest unit in the operating system that can perform operational scheduling. It is included in the process and is the actual unit of operation in the process. A thread refers to a single sequence of control flows in a process in which multiple threads can be parallel, and each thread performs a different task in parallel. The SunOS is also known as the thread bit lightweight process, but the lightweight process is more a kernel thread, and the user thread becomes a thread. Multiple threads in the same process share all system resources in the process, such as virtual address spaces, file descriptors, and signal processing.

#include <iostream>
#include <thread>
void thread_id ()
{
	std::cout << thread ID = = "<< std::this_thread::get_id () << Std::endl;
}

int main ()
{
	std::thread td (THREAD_ID);
	Td.join ();
}

The execution body of a thread can be any callable object or function.

Call the addition function, call the function in the child thread from the main thread, and pass the argument:

#include <iostream>
#include <thread>
void thread_id (int a,int b)
{
	//std::cout << "Thread id = =" << std::this_thread::get_id () << Std::endl;
	Std::cout << A + b << std::endl;
}

int main ()
{
	std::thread td (thread_id,1,2);
	Td.join ();
}

The output result is 3.