That's my point - you can't use "shared" and "new". However, I don't understand why passing a variable by reference to a subroutine does not have the same effect in a multithreaded scenario vs. a single threaded scenario.
That does not make sense. If you comment out the line that says:
printf ("\nSingle thread...\n");
Then you simply repeat the same print statement twice.
The reason I pass a reference to both calls of Child1 is to allow Child1 to modify the content of $TestObj. When I check the value of $TestObj in the main thread after the multithread call, it reverts back to the value it had prior to the call. However, when I do the single thread call, the change is reflected. Child1 simply sets the value of $TestObj->{a} to 2. Both print statements in the main thread should have the value of 2 after both calls.
I put the printf after the call to Child1 to see the effect of calling Child1. Putting the printf before it doesn't accomplish that, or am I missing something?
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