C + + Multithreading 1

A multi-threaded instance

#include"stdafx.h"#include<windows.h>DWORD __stdcall Func (lpvoid pm) {printf_s ("This is a thread, id =%d \ n", GetCurrentThreadID ()); return 0;}intMain () {HANDLE h= CreateThread (NULL,0, Func, NULL,0, NULL);    WaitForSingleObject (H, INFINITE); System ("Pause"); return 0;}

The operation results are as follows

CreateThread function prototype

HANDLE WINAPI CreateThread (

lpsecurity_attributes lpthreadattributes,//security properties for thread kernel objects, NULL for default settings

size_t dwstacksize,//Line stacks space size. 0 means using the default size (1MB)

Lpthread_start_routine lpstartaddress,//thread function address

lpvoid lpparameter,//parameters of the thread function

DWORD dwcreationflags,///extra flag to control thread creation, 0 means immediate execution

Lpdword lpthreadid//thread ID number, NULL indicates no need to return

);

function returns the handle of the thread

WaitForSingleObject function prototype

DWORD WINAPI WaitForSingleObject (

HANDLE hhandle,//kernel object handle

DWORD dwmilliseconds// maximum wait time, in milliseconds, such as 1000 for 1 seconds, incoming 0 returns immediately, incoming infinite means infinite wait.

);

WaitForSingleObject can wait for a kernel object to be triggered, because the thread is not triggered when it is running , the thread ends and the thread object is in a triggered state, so you can use

WaitForSingleObject (H, INFINITE);

Wait for a thread to finish executing,

function returns,

Wait_object_0 object is triggered within the wait time

Wait_timeout object has not been triggered within the wait time

Wait_failed parameter Error

You can use the following code to determine whether a thread is running state

BOOL isruning () {    // Run Detect    ifreturnfalse;     if (WaitForSingleObject (M_hthreadhandle,0returnfalse;//Pass 0 means return immediately, wait_ Timeout means that the object is not triggered, that is, the thread is not stopped

    returntrue

}

C + + Multithreading 1