Add IPC test and fix clippy failures.

Author: rectalogic

.github/workflows/rust.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Checkout Sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Rust Toolchain
         uses: actions-rs/[email protected]

Cargo.toml

@@ -41,3 +41,7 @@ win-sys = "0.3"
 raw_sync = "0.1"
 clap = {version = "4", features = ["derive"]}
 env_logger = "0"
+
+[[test]]
+name = "ipc"
+harness = false

examples/mutex.rs

@@ -57,7 +57,7 @@ fn increment_value(shmem_flink: &str, thread_num: usize) {
     let is_init: &mut AtomicU8;
 
     unsafe {
-        is_init = &mut *(raw_ptr as *mut u8 as *mut AtomicU8);
+        is_init = &mut *(raw_ptr as *mut AtomicU8);
         raw_ptr = raw_ptr.add(8);
     };
 

src/windows.rs

@@ -73,7 +73,7 @@ impl Drop for MapData {
             {
                 Ok(_) => {
                     // 2. Rename file to prevent further use
-                    base_path.push(&format!(
+                    base_path.push(format!(
                         "{}_deleted",
                         self.unique_id.trim_start_matches('/')
                     ));

tests/ipc.rs

@@ -0,0 +1,27 @@
+use shared_memory::ShmemConf;
+use std::{env, process::Command};
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    match args.len() {
+        1 => {
+            let mut s = ShmemConf::new().size(1024).create().unwrap();
+            let bytes = unsafe { s.as_slice_mut() };
+            bytes[0..4].copy_from_slice(b"Ping");
+            let mut child = Command::new(args[0].as_str())
+                .arg(s.get_os_id())
+                .spawn()
+                .unwrap();
+            assert_eq!(child.wait().unwrap().code(), Some(0));
+            let bytes = unsafe { s.as_slice() };
+            assert_eq!(&bytes[0..4], b"PONG");
+        }
+        2 => {
+            let mut s = ShmemConf::new().os_id(args[1].as_str()).open().unwrap();
+            let bytes = unsafe { s.as_slice_mut() };
+            assert_eq!(&bytes[0..4], b"Ping");
+            bytes[0..4].copy_from_slice(b"PONG");
+        }
+        _ => {}
+    }
+}