MOO-cows Mailing List Archive


Re: Mutual Exclusion

On Tue, 7 Nov 1995, CJ Holmes wrote:

> I have a financial-flow simulation where hundreds of robotic "consumers"
> are engaging in various transactions.  I suspect I'm getting into trouble
> when I check an account to see if it has the required sum of currency
> withing, and then subtract from it (in the case of a debit).  What if
> another task modifies the account between those two statements?  Is there a
> way I can "lock" the variable in question?

Say what?  Are you writing to the wrong mailing list?  If I am not as 
confused as I think I am, try adding a second variable that tells the 2 
statements not to access the 1st.

- Kipp


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