2019-08-01

1115.交替打印FooBar/1115-交替打印FooBar.py

@@ -0,0 +1,35 @@
+from threading import *
+class FooBar(object):
+    def __init__(self, n):
+        self.n = n
+        self.lock_foo = Semaphore()
+        self.lock_foo.acquire()
+        self.lock_bar = Semaphore()
+        self.lock_bar.acquire()
+
+    def foo(self, printFoo):
+        """
+        :type printFoo: method
+        :rtype: void
+        """
+        for i in xrange(self.n):
+            # printFoo() outputs "foo". Do not change or remove this line.
+
+            printFoo()
+            self.lock_bar.release()
+            self.lock_foo.acquire()
+
+
+    def bar(self, printBar):
+        """
+        :type printBar: method
+        :rtype: void
+        """
+        for i in xrange(self.n):
+            # printBar() outputs "bar". Do not change or remove this line.
+            self.lock_bar.acquire()
+            printBar()
+
+            self.lock_foo.release()
+
+