Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 65 insertions, 0 deletions

diff --git a/third_party/rust/ringbuf/examples/message.rs b/third_party/rust/ringbuf/examples/message.rs
new file mode 100644
index 0000000000..026dfb1667
--- /dev/null
+++ b/third_party/rust/ringbuf/examples/message.rs
@@ -0,0 +1,65 @@
+extern crate ringbuf;
+
+use std::io::Read;
+use std::thread;
+use std::time::Duration;
+
+use ringbuf::RingBuffer;
+
+fn main() {
+    let buf = RingBuffer::<u8>::new(10);
+    let (mut prod, mut cons) = buf.split();
+
+    let smsg = "The quick brown fox jumps over the lazy dog";
+
+    let pjh = thread::spawn(move || {
+        println!("-> sending message: '{}'", smsg);
+
+        let zero = [0];
+        let mut bytes = smsg.as_bytes().chain(&zero[..]);
+        loop {
+            if prod.is_full() {
+                println!("-> buffer is full, waiting");
+                thread::sleep(Duration::from_millis(1));
+            } else {
+                let n = prod.read_from(&mut bytes, None).unwrap();
+                if n == 0 {
+                    break;
+                }
+                println!("-> {} bytes sent", n);
+            }
+        }
+
+        println!("-> message sent");
+    });
+
+    let cjh = thread::spawn(move || {
+        println!("<- receiving message");
+
+        let mut bytes = Vec::<u8>::new();
+        loop {
+            if cons.is_empty() {
+                if bytes.ends_with(&[0]) {
+                    break;
+                } else {
+                    println!("<- buffer is empty, waiting");
+                    thread::sleep(Duration::from_millis(1));
+                }
+            } else {
+                let n = cons.write_into(&mut bytes, None).unwrap();
+                println!("<- {} bytes received", n);
+            }
+        }
+
+        assert_eq!(bytes.pop().unwrap(), 0);
+        let msg = String::from_utf8(bytes).unwrap();
+        println!("<- message received: '{}'", msg);
+
+        msg
+    });
+
+    pjh.join().unwrap();
+    let rmsg = cjh.join().unwrap();
+
+    assert_eq!(smsg, rmsg);
+}