1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <pthread.h> 4 5void *thrd_func(void *arg); 6 pthread_t tid; 7 8int main(){ 9// 创建线程tid，且线程函数由thrd_func指向，是thrd_func的入口点，即马上执行此线程函数10if (pthread_create(&tid,NULL,thrd_func,NULL)!=0) {11         printf("Create thread error!\n");12         exit(1);13     }1415     printf("TID in pthread_create function: %u.\n",tid);16     printf("Main process: PID: %d,TID: %u.\n",getpid(),pthread_self()); 1718     sleep(1); //race1920return0;21 }2223void *thrd_func(void *arg){24//  printf("I am new thread!\n");25     printf("New process: PID: %d,TID: %u.\n",getpid(),pthread_self()); //why pthread_self26     printf("New process: PID: %d,TID: %u.\n",getpid(),tid); //why pthread_self2728     pthread_exit(NULL); //退出线程29//  return ((void *)0);30 }

 1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <pthread.h> 4 5void *thrd_func1(void *arg); 6void *thrd_func2(void *arg); 7 8int main(){ 9     pthread_t tid1,tid2;10void *tret;11// 创建线程tid1，线程函数thrd_func112if (pthread_create(&tid1,NULL,thrd_func1,NULL)!=0) {13         printf("Create thread 1 error!\n");14         exit(1);15     }16// 创建线程tid2,线程函数thrd_func217if (pthread_create(&tid2,NULL,thrd_func2,NULL)!=0) {18         printf("Create thread 2 error!\n");19         exit(1);20     }21// 等待线程tid1结束，线程函数返回值放在tret中22if (pthread_join(tid1,&tret)!=0){23         printf("Join thread 1 error!\n");24         exit(1);25     }2627     printf("Thread 1 exit code: %d.\n",(int *)tret);28// 等待tid2结束，线程函数返回值放在tret中29if (pthread_join(tid2,&tret)!=0){30         printf("Join thread 2 error!\n");31         exit(1);32     }3334     printf("Thread 2 exit code: %d.\n",(int *)tret);3536return0;37 }3839void *thrd_func1(void *arg){40     printf("Thread 1 returning!\n");41//  sleep(3);42return ((void *)1); // 自动退出线程43 }4445void *thrd_func2(void *arg){46     printf("Thread 2 exiting!\n");47     pthread_exit((void *)2);  // 线程主动退出，返回(void *)248 }

 1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <pthread.h> 4 5void *thrd_func1(void *arg); 6void *thrd_func2(void *arg); 7 8 pthread_t tid1,tid2; 910int main(){11// 创建线程tid1，线程函数thrd_func112if (pthread_create(&tid1,NULL,thrd_func1,NULL)!=0) {13         printf("Create thread 1 error!\n");14         exit(1);15     }16// 创建线程tid2，线程函数thrd_func217if (pthread_create(&tid2,NULL,thrd_func2,NULL)!=0) {18         printf("Create thread 2 error!\n");19         exit(1);20     }21// 等待线程tid1退出22if (pthread_join(tid1,NULL)!=0){23         printf("Join thread 1 error!\n");24         exit(1);25     }else26         printf("Thread 1 Joined!\n");27// 等待线程tid2退出28if (pthread_join(tid2,NULL)!=0){29         printf("Join thread 2 error!\n");30         exit(1);31     }else32         printf("Thread 2 Joined!\n");3334return0;35 }3637void *thrd_func1(void *arg){38//  pthread_setcancelstate(PTHREAD_CANCEL_DISABLE,NULL);39     pthread_setcancelstate(PTHREAD_CANCEL_ENABLE,NULL); // 设置其他线程可以cancel掉此线程4041while(1) {42         printf("Thread 1 is running!\n");43         sleep(1);44     }45     pthread_exit((void *)0);46 }4748void *thrd_func2(void *arg){49     printf("Thread 2 is running!\n");50     sleep(5);51if (pthread_cancel(tid1)==0)  // 线程tid2向线程tid1发送cancel52         printf("Send Cancel cmd to Thread 1.\n");5354     pthread_exit((void *)0);55 }

 1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <pthread.h> 4 5#define THREAD_NUM 3 6#define REPEAT_TIMES 5 7#define DELAY 4 8 9void *thrd_func(void *arg);1011int main(){12     pthread_t thread[THREAD_NUM];13int no;14void *tret;1516     srand((int)time(0)); // 初始化随机函数发生器 1718for(no=0;no<THREAD_NUM;no++){19if (pthread_create(&thread[no],NULL,thrd_func,(void*)no)!=0) { // 创建THREAD_NUM个线程，传入(void*)no作为thrd_func的参数20             printf("Create thread %d error!\n",no);21             exit(1);22         } else23             printf("Create thread %d success!\n",no);24     }2526for(no=0;no<THREAD_NUM;no++){27if (pthread_join(thread[no],&tret)!=0){ // 等待thread[no]线程结束，线程函数返回值放在tret中28             printf("Join thread %d error!\n",no);29             exit(1);30         }else31             printf("Join thread %d success!\n",no);32     }3334return0;35 }3637void *thrd_func(void *arg){38int thrd_num=(void*)arg;39int delay_time=0;40int count=0;4142     printf("Thread %d is starting.\n",thrd_num);43for(count=0;count<REPEAT_TIMES;count++) {44         delay_time=(int)(DELAY*(rand()/(double)RAND_MAX))+1;45         sleep(delay_time);46         printf("\tThread %d:job %d delay =%d.\n",thrd_num,count,delay_time);47     }4849     printf("Thread %d is exiting.\n",thrd_num);50     pthread_exit(NULL);51 }

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和上一版本的程序差异在于有没有锁，有锁的情况下，必须等"thread x is exiting."之后其他线程才能继续。