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我想創建一個程序,每次調用特定方法時都會創建一個新線程。這是我的工作代碼到目前爲止:每次使用pthread調用方法時創建一個新線程
#define NUMBER_OF_THREADS 3
pthread_t threads[NUMBER_OF_THREADS];
pthread_attr_t attr;
void *BusyWork(void *t)
{
int i;
long tid;
tid = (long)t;
printf("Thread %ld running...\n",tid);
// ...
printf("Thread %ld completed...\n",tid);
pthread_exit((void*) t);
}
void createNewThread(int number){
printf("running createNewThread(%d)\n", number);
pthread_t tid;
int rc = pthread_create(&tid, &attr, BusyWork, (void *) (long)number);
if (rc) {
printf("ERROR; return code from pthread_create() is %d\n", rc);
exit(-1);
}
}
int main(int argc, char *argv[]) {
int i, rc;
//Set up thread attributes
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
//Arbitary amount of calls (My real program will call the createNewThread() funcion multiple unkown amount of times)
createNewThread(15);
createNewThread(27);
createNewThread(62);
createNewThread(500);
createNewThread(8864);
createNewThread(99999);
//Free attributes
pthread_attr_destroy(&attr);
//Wait for other threads still running
// HOW CAN I DO THIS????
/*for (i=0; i< NUMBER_OF_THREADS; i++){
rc = pthread_join(??? , NULL); //TODO
if (rc){
printf("ERROR: return code from pthread_join() %d\n", rc);
exit(-1);
}
printf("Main: completed join with thread %d\n", i);
}*/
printf("Main: program completed. Exiting.\n");
pthread_exit(NULL); // (?) Is this part nessassary as we are on the main thread and soon to exit the program
return 0;
}
但是,正如你可以在我的代碼中看到有幾個問題!例如,我如何等待所用的代碼完成所有進程,因爲我沒有跟蹤線程號。此外,當一個線程「忙碌」完成後,它不會自行清理並作爲孤立進程離開。
我想到的一個想法是使用一個向量來跟蹤每個線程號,然後將它用於main結尾處的最終連接。然而,問題在於數組列表很容易變得非常大,即使線程完成也不會縮小。
David,您的個人資料中有一個錯字:'crytpo-currency'。 – halfer 2018-01-15 17:31:55