adding threading module

Author: vbcssc

examples/threading/lock_rlock.py

@@ -0,0 +1,83 @@
+import _thread
+import time
+import threading
+import PikaStdLib
+# 共享资源
+shared_resource = 0
+
+# 互斥锁
+mutex = threading.Lock()
+
+# 线程函数
+
+finished = 0
+
+
+def thread_function(name, delay):
+    global shared_resource
+    global mutex, finished
+    print("delay : %s" % str(delay))
+    k = 0
+    i = 0
+    mem = PikaStdLib.MemChecker()
+    for i in range(5):
+        # while 1:
+
+        try:
+            # 获取互斥锁
+            print("%s try to acquire lock. #1" % name)
+            res = mutex.acquire(True, None)
+            print("res: %s" % str(res))
+            if 1:  # 测试RLock或者Lock的超时加上
+                print("%s try to acquire lock. #2" % name)
+                res = mutex.acquire(True, 0.5)
+                print("res: %s" % str(res))
+            if res:
+                print("%s acquire lock SUCC." % name)
+            else:
+                print("%s acquire lock FAIL." % name)
+            # 打印当前线程名称和共享资源的值
+            print("Thread %s: Iteration %d, Shared Resource: %d" %
+                  (name, i, shared_resource))
+
+            # 更新共享资源
+            shared_resource += 1
+
+            # 模拟工作时间
+
+            time.sleep(delay)
+            print("wake")
+
+            # 释放互斥锁
+            mutex.release()
+            mutex.release()
+            k += 1
+
+            print("%s i = %d." % (name, i))
+            # print('mem used now:')
+            # mem.now()
+
+        except:
+            print("------------- error ---------------")
+
+    print("%s exit , at last, i = %d." % (name, k))
+    finished += 1
+
+# 主函数
+
+
+def main():
+    # 创建第一个线程
+    _thread.start_new_thread(thread_function, ("Thread-1", 0.1))
+    time.sleep(0.5)
+    # 创建第二个线程
+    _thread.start_new_thread(thread_function, ("Thread-2", 0.2))
+
+    # 主线程等待子线程结束
+    # 由于 _thread 没有 join 方法，我们通过 sleep 来模拟等待
+    # time.sleep(60)
+    while finished < 2:
+        time.sleep(1)
+
+
+main()