c++多线程基本样例

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>

void *myfunc1(void *arg);
void *myfunc2(void *arg);

int main()
{
	pthread_t pthid1;
	pthread_t pthid2;
	long clientfd = 3;

	int ival=0;
	int iret=0;

	void **my;


	pthread_create(&pthid1, NULL, myfunc1, (void*)clientfd); // create之后线程就会启动
	pthread_create(&pthid2, NULL, myfunc2, (void*)clientfd);

	iret = pthread_join(pthid1,(void**)&ival);
	// iret = pthread_join(pthid1,my); // 第二个参数必须传void **retval类型

	printf("begin join1:\n");
	// printf("iret=%d, ival=%d\n", iret, ival);

	// printf("iret=%d, my1=%p\n", iret, my);
	// printf("iret=%d, my1=%p\n", iret, *my);

	pthread_join(pthid2,NULL);
	printf("begin join2:\n");

	printf("close\n");
	return 0;

}
void *myfunc1(void *arg)
{
	long ii = (long)arg;
	printf("myfunc1函数参数为: %d\n", ii);
	for(int jj=0; jj<=3; jj++) {
		printf("(1)jj:%d\n", jj);
		sleep(1);
	}

	return (void*)3;
	
	// pthread_exit(3);
}

void *myfunc2(void *arg)
{
	long ii = (long)arg;
	printf("myfunc2函数参数为: %d\n", ii);
	for(int jj=0; jj<=6; jj++) {
		printf("(2)jj:%d\n", jj);
		sleep(1);
	}
}