C thread lock

Lock The role of

      Lock It can be seen as a critical area in the operating system ,Lock The code in the area represents the critical area , Only one thread can enter at the same time Lock Included functions , Atomic operation , To protect the same resource, only one thread can modify , Realize the synchronization of data in different threads .
       Not in Lock The thread of will be blocked waiting , until Lock Only when the lock is opened can one of them wake up to enter , And lock it 

Lock Use

   private  Object thisLock = new Object();// Create object lock 

    lock (thisLock)

   {   

         // Critical code section

    }

Lock Precautions for use

   1、  Note that the object lock created first , It should be the same object that different threads can access , So at least it should be global in the class , Should not be a local variable .
   2、 To achieve global object locking , have access to static, example ：
    private  static Object thisLock = new Object();// Create object lock 
   3、 Combined with the running characteristics of their own threads , Choose the right object lock