Linux pthread_exit()传递线程返回码

Linux pthread_exit()传递线程返回码

​（1）通过全局变量进行传递​struct food{ int a; int b; int c;};struct food apple;void* task1(void* arg){ apple.a = 27; apple.b = 12; apple.c = 39; pthread_exit((void*)&apple);}int main(int argc, char *argv[]){ pthread_t thrd1, thrd2, thrd3; void* tret; pthread_create(&thrd1, NULL, (void*)task1, NULL); pthread_join(thrd1, (void*)&tret);　　 printf("The food:%d %d %d\n", ((struct food*)(tret))->a, ((struct food*)(tret))->b, ((struct food*)(tret))->c); printf("Main thread exit...\n"); return 0;} 程序输出：[root@robot ~]# gcc thread_exit.c -lpthread -o thread_exit[root@robot ~]# ./thread_exitThe food:27 12 39Main thread exit...[root@robot ~]#（2）通过malloc分配变量进行传递struct food{ int a; int b; int c;};void* task1(void* arg){ struct food *apple = malloc(sizeof(struct food)); apple->a = 23; apple->b = 82; apple->c = 59; pthread_exit((void*)apple);}int main(int argc, char *argv[]){ pthread_t thrd1, thrd2, thrd3; void* tret; pthread_create(&thrd1, NULL, (void*)task1, NULL); pthread_join(thrd1, (void*)&tret); printf("The food:%d %d %d\n", ((struct food*)(tret))->a, ((struct food*)(tret))->b, ((struct food*)(tret))->c); free(((struct food*)tret)); printf("Main thread exit...\n"); return 0;} 程序输出：[root@robot ~]# gcc thread_exit.c -lpthread -o thread_exit[root@robot ~]# ./thread_exitThe food:23 82 59Main thread exit...[root@robot ~]#

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