From cbb8f43ad325c4f5a0e86e80865f71e817fc8536 Mon Sep 17 00:00:00 2001
From: Hatter Jiang <jht5945@gmail.com>
Date: Sat, 19 Mar 2022 23:45:47 +0800
Subject: [PATCH] feat: add README.md

---
 __concurrent/async_study/README.md          | 22 +++++++++++++++++++++
 __concurrent/async_study/examples/async4.rs | 10 ++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 __concurrent/async_study/README.md
 create mode 100644 __concurrent/async_study/examples/async4.rs

diff --git a/__concurrent/async_study/README.md b/__concurrent/async_study/README.md
new file mode 100644
index 0000000..235bbba
--- /dev/null
+++ b/__concurrent/async_study/README.md
@@ -0,0 +1,22 @@
+Import `tokio`:
+
+```
+tokio = { version = "1.0", features = ["full"] }
+```
+
+Usage:
+
+```rust
+#[tokio::main]
+async fn main() {
+    // TODO ...
+}
+```
+
+`tokio` 提供以下几种 channels 类型:
+
+* mpsc: 多生产者，单消费者 - https://docs.rs/tokio/1/tokio/sync/mpsc/index.html
+* oneshot: 单生产者，单消费者 - https://docs.rs/tokio/1/tokio/sync/oneshot/index.html
+* broadcast: 多生产者，多消费者 - https://docs.rs/tokio/1/tokio/sync/broadcast/index.html
+* watch: 单生产者，多消费者 - https://docs.rs/tokio/1/tokio/sync/watch/index.html
+
diff --git a/__concurrent/async_study/examples/async4.rs b/__concurrent/async_study/examples/async4.rs
new file mode 100644
index 0000000..ca71a84
--- /dev/null
+++ b/__concurrent/async_study/examples/async4.rs
@@ -0,0 +1,10 @@
+fn main() {
+    let rt = tokio::runtime::Runtime::new().unwrap();
+    rt.block_on(async {
+        invoke().await
+    });
+}
+
+async fn invoke() {
+    println!("Hello World!");
+}
\ No newline at end of file