Threads II: Atomics, Mutexes, Thread-Specific Variables
3Today we talked about how to handle conflicts that can occur when multithreading when two threads access the same variable at the same time.
One way is to use atomic integers, which have the ability to be added to and subtracted from without violating the laws of time and space.
Mutual Exclusion - Mutexes are a more generally useful solution - basically you can start a block of code with a lock_guard attached to a mutex, and then only one thread can be in that block of code at a time. Nice!
Thread-specific variables means splitting up a variable into a bunch of variables, and then after all the threads finish, add them together or whatever. For example, if you want to find the maximum value in an array, you can have each thread report its value in its own global variable, and then main() can print to the screen the biggest one.
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