#include <stdlib.h> #include <pthread.h> #include <stdio.h> #include <sched.h> //取消线程,是否会释放线程的所有资源?例子: void *thread1(void *arg) { printf("start thread (%u) ", (unsigned)pthread_self()); } int main(int argc, char *argv[]) { pthread_t t1, t2, t3; int ret; printf("main start "); do{ ret = pthread_create(&t1, NULL, thread1, NULL); if(ret != 0) { printf("create thread failed "); exit(1); } pthread_cancel(t1); printf("<<<<<<");//much too importent这行代码很重要 //pthread_join(t1, NULL);这句加上,将不断创建新线程. if(ret != 0) { printf("join failed "); exit(1); } }while(1); return 0; } //运行结果: /*start thread (349191056), 327 start th<<<<<<<<<<<<<<<<<<<<<<<create thread failed 注意:每次运行的结果都不一样,在主线程里面加了printf限制产生线程的速度,但是能生成的线程数都在350个左右,应该可以判断,取消并没完全释放资源。所以取消线程后,还应该用join来完全释放资源.*/ //注意:取消线程相当于使用pthread_exit终止线程。