mutex;  //代表一個(gè)全局互斥對(duì)象
  void A()
   {
     mutex.lock();
     //這里操作共享數(shù)據(jù)
     B(); //這里調(diào)用B方法
     mutex.unlock();
     return;
   }
 
  void B()
   {
     mutex.lock();
     //這里操作共享數(shù)據(jù)
     mutex.unlock();
     return;
   }

mutex;  //代表一個(gè)全局互斥對(duì)象
  void A()
   {
     mutex.lock();
     //這里操作共享數(shù)據(jù)
      if(.....)
     {
       return;
      }
     mutex.unlock();
     return;
   }

void data_process() 
{ 
  EnterCriticalSection();  
  if(/* error happens */) 
    return;  
  LeaveCriticalSection(); 
} 

void sub_func() 
{ 
  EnterCriticalSection(); 
  do_something(); 
  LeaveCriticalSection(); 
} 
 
void data_process() 
{ 
  EnterCriticalSection(); 
  sub_func(); 
  LeaveCriticalSection(); 
} 

void data_process1() 
{ 
  EnterCriticalSection(&cs1); 
  EnterCriticalSection(&cs2); 
  do_something1(); 
  LeaveCriticalSection(&cs2); 
  LeaveCriticalSection(&cs1); 
} 
 
void data_process2() 
{ 
  EnterCriticalSection(&cs2); 
  EnterCriticalSection(&cs1); 
  do_something2(); 
  LeaveCriticalSection(&cs1); 
  LeaveCriticalSection(&cs2); 
}