C/C++中线程基本概念与创建详解

HANDLE CreateThread(
    LPSECURITY_ATTRIBUTES lpThreadAttributes,//SD
    SIZE_T dwStackSize,//initialstacksize
    LPTHREAD_START_ROUTINE lpStartAddress,//threadfunction
    LPVOID lpParameter,//threadargument
    DWORD dwCreationFlags,//creationoption
    LPDWORD lpThreadId//threadidentifier
)

unsigned long _beginthreadex(
    void *security,    // 安全属性， 为NULL时表示默认安全性
    unsigned stack_size,    // 线程的堆栈大小， 一般默认为0
    unsigned(_stdcall *start_address)(void *),   // 线程函数
    void *argilist, // 线程函数的参数
    unsigned initflag,    // 新线程的初始状态，0表示立即执行，//CREATE_SUSPENDED表示创建之后挂起
    unsigned *threaddr    // 用来接收线程ID
 
);

#include<stdio.h>
#include<Windows.h>
#include<process.h>
 
//Tom每隔3秒捉一次老鼠
unsigned WINAPI thread_main_Tom(void* arg) {
	int cnt = *((int*)arg);
	for (int i = 0; i < cnt; i++) {
		Sleep(3000);
		puts("Tom 捉老鼠\n");
	}
	return 0;
}
//Jerry每隔1秒吃一次奶酪
unsigned WINAPI thread_main_Jerry(void* arg) {
	int cnt = *((int*)arg);
	for (int i = 0; i < cnt; i++) {
		Sleep(1000);
		puts("Jerry 吃奶酪\n");
	}
	return 0;
}
//Spike每隔2秒打一次猫
unsigned WINAPI thread_main_Spike(void* arg) {
	int cnt = *((int*)arg);
	for (int i = 0; i < cnt; i++) {
		Sleep(2000);
		puts("Spike 打猫\n");
	}
	return 0;
}
 
int main() {
	int Tom = 20, Jerry = 50, Spike = 40;
    //保存线程Id
	unsigned int Tom_id, Jerry_id, Spike_id;
    //创建线程
	_beginthreadex(NULL, 0, thread_main_Tom, (void*)&Tom, 0, &Tom_id);
	_beginthreadex(NULL, 0, thread_main_Jerry, (void*)&Jerry, 0, &Jerry_id);
	_beginthreadex(NULL, 0, thread_main_Spike, (void*)&Spike, 0, &Spike_id);
	system("pause");
	return 0;
}

#include<stdio.h>
#include<Windows.h>
#include<process.h>
 
//DWORD就是unsigned long
//LPVOID是void*
DWORD _stdcall ThreadFun(LPVOID p) {
 
	printf("我是子线程，PID=%d", GetCurrentThreadId());
	return 0;
}
 
int main() {
	printf("main begin\n");
	HANDLE hThead;
	DWORD dwThreadID;
	hThead = CreateThread(NULL, 0, ThreadFun, 0, 0, &dwThreadID);
	printf("我是主线程，PID=%d\n",GetCurrentThreadId());
	Sleep(2000);
	//关闭线程
	if (hThead) {
		CloseHandle(hThead);
	}
	system("pause");
	return 0;
}