On 3/22/2013 3:35 PM, Will Deng wrote:
Even if two threads are writing to the same word, as long as thread 1
doesn't modify thread_2_data, it should be ok, right?
Nope: the usual way for a processor to do this is to read the entire
word, modify the appropriate bits, and then write the entire word. This
is very definitely a race in your situation. Thread 1 would write the
old value of thread_2_data with the new value of thread_1_data, or vice
versa.
--
David Chapman [email protected]
Chapman Consulting -- San Jose, CA
Software Development Done Right.
www.chapman-consulting-sj.com
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