Determination of thread status.

[Vitaly]

Hi all.
I can not understand how to track me that the thread has finished 
work.
eg:

import std.concurrency;
void myThread ()
{
// Do the work
}

void main ()
{
Tid thread = spawn (& myThread);
// It is necessary to check whether the thread has finished its 
work or is active.
}

Could you tell me how to do this?