docs: Update README.md

README.md

@@ -18,7 +18,7 @@ The default policy and weights reduce the memory usage by 45.7% and the borrow h
 
 Using Pond requires the implementation of an object factory, PooledObjectFactory, which provides object creation, initialization, destruction, validation, and other operations called by Pond. So in order for the object pool to support holding completely different objects, Pond uses a dictionary to save the name of each factory class and the instantiated objects of the factory class it implements.
 
-Ponds are thread-safe for borrowing and recycling, and Python's queue module provides a first-in, first-out (FIFO) data structure for multi-threaded programming. It can be used to safely pass messages or other data between producer and consumer threads. Locks are handled by the caller, and all multiple threads can safely and easily work with the same Queue instance. The borrowing and recycling of a Pond is all about manipulating the queue, so it is basically considered thread-safe.
+Ponds are thread-safe and coroutine-safe for borrowing and recycling, and Python's queue module provides a first-in, first-out (FIFO) data structure for multi-threaded programming. It can be used to safely pass messages or other data between producer and consumer threads. Locks are handled by the caller, and all multiple threads can safely and easily work with the same Queue instance. The borrowing and recycling of a Pond is all about manipulating the queue, so it is basically considered thread-safe.
 
 The auto-recycle is executed at regular intervals, 300s by default. Automatically cleans up the objects in the infrequently used object pool.
 

README_ZH.md

@@ -39,6 +39,9 @@ PooleedObjectTree 是个字典，每个 key 对应着一个先进先出的队列
 
 Pond 的借用和回收都是线程安全的。Python 的 queue 模块提供了一个适用于多线程编程的先进先出（FIFO）数据结构。它可以用来安全地在生产者和消费者线程之间传递消息或其他数据。锁是调用者来处理的，所有多个线程能够安全且容易的使用同样的 Queue 实例工作。而 Pond 的借用和回收都是在操作 queue，所以基本可以认为是线程安全的。
 
+## 协程安全
+使用 `async_` 开头的方法，自带协程锁，可以简单实现协程安全。比如 `async_borrow()`。
+
 ## 借出机制
 
 在使用 Pond 借出一个对象时，会先检查想要借出的对象的种类是否已经在 PooledObjectTree 存在，如果存在会检查这个对象的对象池是否为空，如果为空会创建一个新的。