A multithreaded web server wishes to keep track of the number of requests it services (known as hits.) Consider the following two strategies to prevent a race condition on the variable hits. The first strategy is to use a basic mutex lock when updating hits: int hits;
mutex lock hit lock;
hit lock. acquire();
hit lock. release();
A second strategy is to use an atomic integer:
atomic t hits;
atomic inc(&hits);
Explain which of these two strategies is more efficient.