怎么用信号量实现线程栅栏同步 谢谢

tiwowo

我的线程数为4个。想了很久没想明白。帮个忙谢谢。

tiwowo

那个我知道 我在网上看到别人回复能用信号量实现 线程栅栏同步 我没想明白  希望高手指点下

albeta

用信号灯
semctl semctl semop一类的函数

albeta

如果是多线程，也可以用这些
pthread.h:extern int pthread_barrier_init (pthread_barrier_t *__restrict __barrier,
pthread.h:                                 __const pthread_barrierattr_t *__restrict
pthread.h:extern int pthread_barrier_destroy (pthread_barrier_t *__barrier) __THROW;
pthread.h:extern int pthread_barrierattr_init (pthread_barrierattr_t *__attr) __THROW;
pthread.h:extern int pthread_barrierattr_destroy (pthread_barrierattr_t *__attr) __THROW;
pthread.h:extern int pthread_barrierattr_getpshared (__const pthread_barrierattr_t *
pthread.h:extern int pthread_barrierattr_setpshared (pthread_barrierattr_t *__attr,
pthread.h:extern int pthread_barrier_wait (pthread_barrier_t *__barrier) __THROW;