1115-print-foobar-alternately

DevGod

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Caution

DevGod needs to write an editorial for this problem!

py

class FooBar:
    def __init__(self, n):
        self.n = n
        self.fooLock = threading.Lock()
        self.barLock = threading.Lock()

        self.barLock.acquire()

    def foo(self, printFoo: 'Callable[[], None]') -> None:

        for i in range(self.n):
            self.fooLock.acquire()
            # printFoo() outputs "foo". Do not change or remove this line.
            printFoo()
            self.barLock.release()


    def bar(self, printBar: 'Callable[[], None]') -> None:

        for i in range(self.n):
            self.barLock.acquire()
            # printBar() outputs "bar". Do not change or remove this line.
            printBar()
            self.fooLock.release()