Using lock() with ArrayList

fakepoo · #1 11-Feb-2009, 14:47

Hello experts. I am trying to lock a portion of my code where I have 2 ArrayList objects and need to transfer elements from one to the other. I am having a problem in that after I leave the lock() block, the elements in one of my arrays have vanished. Like so:

C-SHARP / C# Code:

ArrayList list1 = new ArrayList();
ArrayList list2 = new ArrayList();
Object mylock = new Object();
//....
lock(mylock)
{
  for(int i=0;i<list1.Count;++i)
  {
    list2.Add( list1[0] );
    list1.RemoveAt( 0 );
  }
   // Here, list2 has elements
}
// Here, list2 does not have elements

fakepoo · #2 11-Feb-2009, 15:10

My apologies. There was not a problem. It just appeared as though there was.

erniegerdie · #3 06-Apr-2009, 06:06

One point to note, you should really have your object as a readonly object, so that it cannot be changed whilst in the lock()

readonly Object mylock = new Object();

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Rate This Thread
Rate This Thread:

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Opperations on objects in ArrayList	05131013	Java Forum	1	25-Apr-2008 13:14
How do I lock the hardware buttons of Pocket PC in Dot net compact framework 2.0	Anil Darandale	.NET Forum	0	14-Feb-2008 00:21
Lock Folder Without Any Software	nsnraju	Computer Software Forum - Windows	0	28-Sep-2007 01:18
Permission denied: ap_proxy: couldn't release the lock	com2com	Apache Web Server Forum	0	25-Mar-2006 10:23
Simple file lock works on unices, not on Windows	QED	C++ Forum	1	03-Feb-2005 07:25

Using lock() with ArrayList

Re: Using lock() with ArrayList

Re: Using lock() with ArrayList