1 #ifndef MUTEX_CLASS_H 2 #define MUTEX_CLASS_H 3  4 class mutex_class 5 { 6 public: 7     mutex_class(); 8     void lock(); 9     void unlock();10 11 private:12     //以下为使用，和一般的锁差不多13     int MUTEX_VALUE;14 };15 16 #endif // MUTEX_CLASS_H

1 #include "mutex_class.h" 2 #include 
     
       3  4 #define LOCK_VALUE  0 5 #define   UNLOCK_VALUE 1 6 //nt MUTEX_VALUE  = LOCK_VALUE; 7 #define FREE_LOCK(MUTEX_VALUE_LOCK)\ 8     while (!(__sync_bool_compare_and_swap (\ 9               &MUTEX_VALUE_LOCK,LOCK_VALUE, \10               UNLOCK_VALUE) )) \11                  sched_yield();12 13  #define FREE_UNLOCK(MUTEX_VALUE_LOCK)\14          __sync_bool_compare_and_swap (&MUTEX_VALUE_LOCK, UNLOCK_VALUE, LOCK_VALUE);15 16 17 18 19 mutex_class::mutex_class()20 {21     MUTEX_VALUE = LOCK_VALUE;22 }23 24 void mutex_class::lock()25 {26     FREE_LOCK(MUTEX_VALUE)27 }28 29 void mutex_class::unlock()30 {31     FREE_UNLOCK(MUTEX_VALUE)32 }