参考：https://blog.csdn.net/chm880910/article/details/48377273
简单例子：
#include <stdio.h>
#include <pthread.h>
#include <iostream>
using namespace std;//创建线程示例：
void* thread_1(void* args)
{ for( int i = 0;i < 3; i++ )printf("This is a pthread.\n");
}int test_thread_1()
{pthread_t id=0;int ret;ret = pthread_create( &id, NULL, thread_1, NULL );if ( ret!=0 ) {printf ("Create pthread error!\n");return 1;}for( int i = 0; i < 3; i++ )printf("This is the main process.\n");pthread_join(id,NULL);return 0;
}// 向线程执行函数 传入参数，以及返回线程执行函数的结果 示例：void* thread_2( void *arg )
{for (int i=0;i<5;i++){printf( "This is a thread and arg[%d] = %d.\n",i, ((int*)arg)[i]);((int*)arg)[i] += 1;//plus 1}return arg;
}int test_thread_2()
{pthread_t th=2;int ret;int arg[5] = {1,2,3,4,5};int *thread_ret = NULL;ret = pthread_create( &th, NULL, thread_2, arg );if( ret != 0 ){printf( "Create thread error!\n");return -1;}printf( "This is the main process.\n" );pthread_join( th, (void**)&thread_ret );for (int i=0;i<5;i++){printf( "thread_ret arg[%d] = %d.\n",i, ((int*)thread_ret)[i]);}return 0;
}int main( int argc, char *argv[] )
{test_thread_1();test_thread_2();return 0;
}
在类中,将类成员函数传入pthread_create，创建线程，示例：
需将线程执行函数定义成静态成员函数；
如需访问类的非static数据成员， 可将this指针作为参数传递给静态成员函数，这样可以通过该this指针访问非static数据成员；
如果还需要向静态函数中传递我自己需要的参数，可将this指针和需要的参数作为一个结构体一起传给静态函数；
具体请看下面示例代码：
//在类中pthread_create创建线程模板：
class A;
struct ARG
{A* pThis;string var;
};
class A
{public:A();~A();static void* thread(void* args);void excute();private:int iCount;};A::A()
{iCount = 10;
}
A::~A()
{}
void* A::thread(void* args)
{ARG *arg = (ARG*)args;A* pThis = arg->pThis;string var = arg->var;cout<<"传入进来的参数var: "<<var<<endl;cout<<"用static线程函数调用私有变量： "<<pThis->iCount<<endl;}void A::excute()
{int error;pthread_t thread_id;ARG *arg = new ARG();arg->pThis = this;arg->var = "abc";error = pthread_create(&thread_id, NULL, thread, (void*)arg);if (error == 0){cout<<"线程创建成功"<<endl;pthread_join(thread_id, NULL);}
}int test_thread_3()
{A a;a.excute();return 0;}