mpsc and mermaid test

Cargo.lock

@@ -897,6 +897,13 @@ dependencies = [
  "anyhow",
 ]
 
+[[package]]
+name = "mpsc-full"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+]
+
 [[package]]
 name = "nom"
 version = "7.1.3"

Cargo.toml

@@ -15,11 +15,13 @@ members = [
   "members/matchmatchmatch",
   "members/future_stream",
   "members/mpsc",
+  "members/mpsc-full",
 ]
 default-members = [
   ".",
   "members/revsqrt",
   "members/mpsc",
+  "members/mpsc-full",
   "members/criterion-demo",
   "members/shortc",
   "members/pest-demo",

README.md

@@ -3,6 +3,11 @@
 This project contains various smaller rust projects, often made by myself to
 gain more understanding with a topic or dependency.
 
+```mermaid
+graph TD
+Start --> End
+```
+
 ## Rust unsafe
 
 Unsafe rust offers many possibilities otherwise locked from rust, which might

members/mpsc-full/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "mpsc-full"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+anyhow.workspace = true

members/mpsc-full/src/main.rs

@@ -0,0 +1,31 @@
+//! what happens when we send a lot of items to an mpsc?
+
+use std::{
+    sync::{mpsc, Barrier},
+    thread,
+};
+
+const NUMS: &[u8] = &[1, 3, 3, 7, 0xd, 0xe, 0xa, 0xd, 0xb, 0xe, 0xe, 0xf];
+
+fn main() -> anyhow::Result<()> {
+    let (sender, receiver) = mpsc::channel();
+
+    for n in NUMS {
+        sender.send(n).unwrap();
+    }
+    drop(sender);
+
+    let mut collect = Vec::new();
+
+    while let Ok(n) = receiver.recv() {
+        collect.push(*n);
+    }
+
+    for i in NUMS {
+        assert!(collect.contains(i))
+    }
+
+    println!("it stores the values, even when the sender is dropped");
+
+    Ok(())
+}