pthread_create

#include "stdio.h"
#include "string.h"
#include "stdlib.h"
#include "pthread.h"
#include "unistd.h"


pthread_t ntid;

void printids(const char *s)
{
    pid_t  pid;
    pthread_t tid;

    pid = getpid();/*获取进程id*/
    tid = pthread_self();/*获取线程id*/
    printf("%s pid %d  tid %u(0x%x)\n",s,(unsigned int)pid,(unsigned int)tid,(unsigned int)pid);

}

void * thr_fn(void *arg)
{
    printids(arg);
    return NULL;
}
int main(void)
{
    int err = 0;
    void * ThreadResult = NULL;

    err = pthread_create(&ntid,NULL,thr_fn,"new thread:");/*创建一个线程*/
    if(err!=0)
    {
        fprintf(stderr,"can't create thread:%s\n",strerror(err));
        exit(1);
    }
    printids("main thread:");/*主线程中的打印*/
    if(0!=pthread_join(ntid,&ThreadResult))
    {
        printf("wait thread fail!\n");
    }

    return 0;
}

编       译：gcc -o pthread_create pthread_create.c -l pthread
运行结果：new  thread: pid 11448  tid 3087461264(0x2cb8)
               main thread: pid 11448  tid 3087464128(0x2cb8)