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POParallel Programming Race Conditions
 

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    <p>I am working through a Parallel Programming example on Race conditions </p> <p>In the example they are demonstrating the isolation patter to deal with race conditions</p> <p>Why is it in this example following that a race condition does not occur when creating the task and the stateObject is passed as part of the task creation </p> <p>I understand that we use isolatedBalance to do the updateing ...but at the point where we assign the <code>isolatedbalance = (int)stateObject</code> could not another tasks finished balance be there i.e not 0 but 100 ???</p> <p>So if there where enough tasks and that the task scheduler started an early task and it finished at a point when a later task is being created and assinged the account.Balance value would be 100 etc for when 1 of the tasks had finshed for a taks that was starting </p> <pre><code>class BankAccount { public int Balance { get; set; } } class Program { static void Main(string[] args) { var account = new BankAccount(); var tasks = new Task&lt;int&gt;[1000]; for (int i = 0; i &lt; 1000; i++) { tasks[i] = new Task&lt;int&gt;((stateObject)=&gt; { int isobalance = (int) stateObject; for (int j = 0; j &lt; 1000; j++) { isobalance ++; } return isobalance; }, account.Balance); tasks[i].Start(); } Task.WaitAll(tasks); for (int i = 0; i &lt; 1000; i++) { account.Balance += tasks[i].Result; } Console.WriteLine("Epectecd valeu {0}, Counter value {1}",1000000,account.Balance); // wait for input before exiting Console.WriteLine("Press enter to finish"); Console.ReadLine(); } } </code></pre>
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