Multiple Threads with same variable

[jnmacd]

Here is what I want to happen:

Create a background thread that polls a DAQ and constantly updates variable VOLTAGE.
Main thread just retrieves latest value stored in VOLTAGE.

I don't really care about synchronization or anything. The two threads are completely independent except the VOLTAGE variable.

Is there any problem with this? How does a computer write to memory... does it write it "bit by bit" ? e.g. is it possible for the main thread to read a half-way updated VOLTAGE value and get incorrect data?

Initial tests seem rock solid, but want to make sure...

Thanks!

Edit: VOLTAGE is just a float array...