5.2.     191

5.2.1.1.      

        -
      ,   -
     :

      (exclusive read and exclusive
-ite-EREW);

      (concurrent read and exclusive
-ite-CREW);

      (exclusive read and concurrent
write-ERCW);

      (concurrent read and concurrent
write-CRCW).

      ,  -
,     (. 5.4).  EREW 
    , ..      
      .   
EREW       "-
",    4.   ,   -
,      ""  
 "".          -
    .  CREW   
           .  -
     ,    -
  ,         . 
          -
 .         
  ,        -
     .   ERCW  
   CREW.    ERCW
     ,      
    .   CRCW    -
    .

          -
.    :   ,  
  ,   ,  
  .     ,
      -
. EREW      ,   , 
,   .      
  CRCW,       .    
,         ,     
        .    : CRCW  -
   ,    .