alenaPy · EgorPichkur · Mar 1, 2019
diff --git a/homework10/LICENSE b/homework10/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2018 EPAM Systems
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/homework10/README.md b/homework10/README.md
@@ -0,0 +1,6 @@
+This package contains examples of threads synchronization using next primitives:
+1) Events
+2) Conditions
+3) Timer
+4) Semaphores
+5) Locks
diff --git a/homework10/setup.py b/homework10/setup.py
@@ -0,0 +1,21 @@
+import setuptools
+
+with open("README.md", "r") as fh:
+    long_description = fh.read()
+
+setuptools.setup(
+    name="sync_package",
+    version="1.0.0",
+    author="Yahor Pichkur",
+    author_email="Yahor_Pichkur@epam.com",
+    description="Threads synchronization examples",
+    long_description=long_description,
+    long_description_content_type="text/markdown",
+    url="https://github.com/EgorPichkur/advanced_python",
+    packages=setuptools.find_packages(),
+    classifiers=[
+        "Programming Language :: Python :: 3",
+        "License :: OSI Approved :: MIT License",
+        "Operating System :: OS Independent",
+    ],
+)
diff --git a/homework10/sync_package/__init__.py b/homework10/sync_package/__init__.py
@@ -0,0 +1 @@
+name = "sync_package"
diff --git a/homework10/sync_package/sync_condition.py b/homework10/sync_package/sync_condition.py
@@ -0,0 +1,34 @@
+"""Homework 3: Thread Synchronization Using Conditions"""
+
+from threading import Condition
+from threading import Thread
+
+
+def print_odd(cv):
+    """Function to print odd numbers"""
+    nums = [x for x in range(101) if x % 2 == 1]
+    for num in nums:
+        with cv:
+            cv.wait()
+            print(num)
+            cv.notify()
+
+
+def print_even(cv):
+    """Function to print even numbers"""
+    nums = [x for x in range(101) if x % 2 == 0]
+    for num in nums:
+        with cv:
+            print(num)
+            cv.notify()
+            if (num != 100):
+                cv.wait()
+
+
+if __name__ == '__main__':
+    condition = Condition()
+    odd = Thread(name='odd', target=print_odd, args=(condition,))
+    even = Thread(name='even', target=print_even, args=(condition,))
+
+    odd.start()
+    even.start()
diff --git a/homework10/sync_package/sync_event.py b/homework10/sync_package/sync_event.py
@@ -0,0 +1,42 @@
+"""Homework 3: Thread Synchronization Using Events"""
+
+from threading import Event
+from threading import Thread
+
+
+class EventThread(Thread):
+    """My thread to work with events"""
+
+    main_event = Event()
+
+    def __init__(self, thread_name):
+        super().__init__()
+
+        self.thread_name = thread_name
+
+        if self.thread_name == 'even':
+            self.nums = [x for x in range(101) if x % 2 == 0]
+        else:
+            self.nums = [x for x in range(101) if x % 2 == 1]
+
+    def run(self):
+        """Implementation of thread's activity"""
+
+        for num in self.nums:
+            if self.thread_name == 'even':
+                while self.main_event.isSet():
+                    pass
+                print(num)
+                self.main_event.set()
+            else:
+                self.main_event.wait()
+                print(num)
+                self.main_event.clear()
+
+
+if __name__ == '__main__':
+    even_thread = EventThread('even')
+    odd_thread = EventThread('odd')
+
+    odd_thread.start()
+    even_thread.start()
diff --git a/homework10/sync_package/sync_lock.py b/homework10/sync_package/sync_lock.py
@@ -0,0 +1,43 @@
+"""Homework 3: Thread Synchronization Using Locks"""
+
+from threading import Lock
+from threading import Thread
+
+
+class LockThread(Thread):
+    """My thread to work with locks"""
+
+    even_lock = Lock()
+    odd_lock = Lock()
+
+    def __init__(self, thread_name):
+        super().__init__()
+
+        self.thread_name = thread_name
+
+        if self.thread_name == 'even':
+            self.nums = [x for x in range(101) if x % 2 == 0]
+            self.odd_lock.acquire()
+        else:
+            self.nums = [x for x in range(101) if x % 2 == 1]
+
+    def run(self):
+        """Implementation of thread's activity"""
+
+        for num in self.nums:
+            if self.thread_name == 'even':
+                self.even_lock.acquire()
+                print(num)
+                self.odd_lock.release()
+            else:
+                self.odd_lock.acquire()
+                print(num)
+                self.even_lock.release()
+
+
+if __name__ == '__main__':
+    even_thread = LockThread('even')
+    odd_thread = LockThread('odd')
+
+    odd_thread.start()
+    even_thread.start()
diff --git a/homework10/sync_package/sync_semaphore.py b/homework10/sync_package/sync_semaphore.py
@@ -0,0 +1,41 @@
+"""Homework 3: Thread Synchronization Using Semaphores"""
+
+from threading import Semaphore
+from threading import Thread
+
+
+class SemaphoreThread(Thread):
+    """My thread to work with semaphores"""
+
+    even_sem = Semaphore(1)
+    odd_sem = Semaphore(0)
+
+    def __init__(self, thread_name):
+        super().__init__()
+
+        self.thread_name = thread_name
+        if self.thread_name == 'even':
+            self.nums = [x for x in range(101) if x % 2 == 0]
+        else:
+            self.nums = [x for x in range(101) if x % 2 == 1]
+
+    def run(self):
+        """Implementation of thread's activity"""
+
+        for num in self.nums:
+            if self.thread_name == 'even':
+                self.even_sem.acquire()
+                print(num)
+                self.odd_sem.release()
+            else:
+                self.odd_sem.acquire()
+                print(num)
+                self.even_sem.release()
+
+
+if __name__ == '__main__':
+    even_thread = SemaphoreThread('even')
+    odd_thread = SemaphoreThread('odd')
+
+    even_thread.start()
+    odd_thread.start()
diff --git a/homework10/sync_package/sync_timer.py b/homework10/sync_package/sync_timer.py
@@ -0,0 +1,24 @@
+"""Homework 3: Thread Synchronization Using Timer"""
+
+from threading import Timer
+from time import sleep
+
+
+def timer_thread(start_num, sleep_time):
+    for num in range(start_num, 101, 2):
+        print(num)
+        sleep(sleep_time)
+
+
+if __name__ == '__main__':
+    sleep_time = 1
+    even_start_num = 0
+    odd_start_num = 1
+
+    even_thread = Timer(sleep_time / 2, timer_thread,
+                        args=[even_start_num, sleep_time])
+    odd_thread = Timer(sleep_time, timer_thread,
+                       args=[odd_start_num, sleep_time])
+
+    even_thread.start()
+    odd_thread.start()