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  1. #include<pthread.h> 
  2. #include<stdio.h>
  3. #include<stdlib.h>
  4. #include<asm/unistd.h>
  5. void *T_Routine(void *param);
  6. int main(int argc,char *argv[])
  7. {
  8. 	int i;
  9. 	int *ran_ret;
  10. 	pthread_t tid1, tid2, tid3;	
  11. 	pthread_attr_t attr1, attr2; 
  12. 	pthread_attr_init(&attr1);
  13. 	pthread_attr_init(&attr2);
  14. 	pthread_attr_setdetachstate(&attr2,PTHREAD_CREATE_DETACHED);
  15. 	pthread_create(&tid1,&attr1,T_Routine,"1");//attr1 can be NULL
  16. 	pthread_create(&tid2,&attr1,T_Routine,"2"); //attr1 can be NULL
  17. 	pthread_create(&tid3,&attr2,T_Routine,"3");
  18. 	pthread_join(tid1,(void **)(&ran_ret));
  19. 	pthread_join(tid2,NULL);
  20. 	printf("Random numbers\n");
  21. 	for(i=1;i<=ran_ret[0];i++)
  22. 		printf("%d\t",ran_ret[i]);
  23. 	printf("\n");
  24. 	free(ran_ret);
  25. 	return 0;	
  26. }
  27.  
  28. // runner function
  29. void *T_Routine ( void *param )
  30. { 	
  31. 	int i,N,K;
  32. 	int *ran;
  33. 	N = atoi(param);
  34. 	printf("PID=%d,PID_TID=%d\n",getpid(),syscall(__NR_gettid));
  35. 	if(N==1)
  36. 	{
  37. 		K=5;
  38. 		ran=(int *)malloc((K+1)*sizeof(int));
  39. 		ran[0]=5;
  40. 		ran[1]=rand();
  41. 		ran[2]=rand();
  42. 		ran[3]=rand();
  43. 		ran[4]=rand();
  44. 		ran[5]=rand();
  45. 		printf("Random value from thread 1\n");
  46. 		for(i=1;i<=ran[0];i++)
  47. 			printf("%d\t",ran[i]);
  48. 		printf("\n");
  49. 		pthread_exit(ran);
  50. 	}
  51. 	else if(N==2)
  52. 	{
  53. 		pthread_detach(pthread_self());
  54. 		pthread_exit(0);
  55. 	}
  56. 	else if(N==3)
  57. 	{
  58. 		pthread_exit(0);
  59. 	}
  60. }
  61.  
Success #stdin #stdout 0s 5284KB
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stdin
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Standard input is empty
stdout
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PID=1542332,PID_TID=1542337
PID=1542332,PID_TID=1542336
PID=1542332,PID_TID=1542335
Random value from thread 1
1804289383	846930886	1681692777	1714636915	1957747793	
Random numbers
1804289383	846930886	1681692777	1714636915	1957747793
https://ideone.com/3uyBtA
language:
C (gcc 8.3)
created:
18 days ago
visibility:
public

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