Re: [問題] pthread的回傳要怎麼寫？

看板LinuxDev作者psboy (屠牛特攻隊)時間16年前 (2009/03/18 20:40)推噓3(3推 0噓 5→)

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: → hpeter:pthread_join & pthread_exit 03/18 00:12 : → psboy:不過問題又來了如果是回傳一堆資料怎麼辦？傳址似乎會出鎚 03/18 11:27 : → psboy:原來一開始就傳struct進去在thread裏面設定好回傳值就好了xD 03/18 16:49 : → hpeter:可以試試在 thread 裡 malloc 一個struct 用 pthread_exit 03/18 20:02 : → hpeter:回傳 address XD 03/18 20:02 試著用malloc一個struct的方法可行 :D 以下是亂改的code xD #include <stdio.h> #include <pthread.h> struct st { int a; char * b; }; void * thread1(void * in) { char * s=(char *)in; printf("This is a pthread1.\n"); printf("%s\n",s); struct st * ast; ast=malloc(sizeof(struct st)); ast->a=111; ast->b="thread1 hello!"; pthread_exit(ast); } void * thread2(void * in) { char * s=(char *) in; printf("This is a pthread2.\n"); printf("%s\n",s); struct st * bnd; bnd=malloc(sizeof(struct st)); bnd->a=222; bnd->b="thread2 hello!"; pthread_exit(bnd); } /**************main function ****************/ int main(void) { pthread_t id1,id2; void *a1,*a2; int i,ret1,ret2; char s1[]="This is first thread!"; char s2[]="This is second thread!"; ret1=pthread_create(&id1,NULL,(void *) thread1,s1); ret2=pthread_create(&id2,NULL,(void *) thread2,s2); if(ret1!=0){ printf ("Create pthread1 error!\n"); exit (1); } pthread_join(id1,&a1); struct st * tmp; tmp=(struct st *) a1; printf("thread1 return int a:%d,string b:%s\n",tmp->a,tmp->b); if(ret2!=0){ printf ("Create pthread2 error!\n"); exit (1); } printf("This is the main process.\n"); pthread_join(id2,&a2); tmp=(struct st *) a2; printf("thread2 return int a:%d,string b:%s\n",tmp->a,tmp->b); } - 至於變數為啥是ast跟bnd 原本是用1st跟2nd compiler不給過 xD 所以才偷改一個字 Or2 也有人跟我說一開始就傳struct位址進去似乎也是個辦法不知道用那種比較好？ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 219.87.143.66 ※ 編輯: psboy 來自: 219.87.143.66 (03/18 20:45)