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30. Threads: Thread Synchronization > Protecting Accesses to Shared Variables: ...

Protecting Accesses to Shared Variables: Mutexes

One of the principal advantages of threads is that they can share information via global variables. However, this easy sharing comes at a cost: we must take care that multiple threads do not attempt to modify the same variable at the same time, or that one thread doesn’t try to read the value of a variable while another thread is modifying it. The term critical section is used to refer to a section of code that accesses a shared resource and whose execution should be atomic; that is, its execution should not be interrupted by another thread that simultaneously accesses the same shared resource.


  

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