From: d@d.d   
      
   Hello,   
      
      
   Here is my new inventions that are my new variants of Scalable RWLocks   
   that are powerful..   
      
   Author: Amine Moulay Ramdane   
      
   Description:   
      
   A fast, and scalable and starvation-free and fair and lightweight   
   Multiple-Readers-Exclusive-Writer Lock called LW_RWLockX, the scalable   
   LW_RWLockX does spin-wait, and also a fast and scalable and   
   starvation-free and fair Multiple-Readers-Exclusive-Writer Lock called   
   RWLockX, the scalable RWLockX doesn't spin-wait but uses my portable   
   SemaMonitor and portable event objects , so it is energy efficient.   
      
   The parameter of the constructors is the size of the array of the   
   readers , so if the size of the array is equal to the number of parallel   
   readers, so it will be scalable, but if the number of readers are   
   greater than the size of the array , you will start to have contention,   
   please look at the source code of my scalable algorithms to understand.   
      
      
   I have used my following hash function to make my new variants of   
   RWLocks scalable:   
      
   ---   
      
   function DJB2aHash(key:int64):uint64;   
   var   
   i: integer;   
   key1:uint64;   
      
   begin   
   Result := 5381;   
   for i := 1 to 8 do   
   begin   
   key1:=(key shr ((i-1)*8)) and $00000000000000ff;   
   Result := ((Result shl 5) xor Result) xor key1;   
   end;   
   end;   
      
   ---   
      
   You can download them from:   
      
   https://sites.google.com/site/scalable68/new-variants-of-scalable-rwlocks   
      
      
   Thank you,   
   Amine Moulay Ramdane.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)