Struct EngineChild 

struct EngineChild {
    child: Child,
    stdin: ChildStdin,
    stdout: BufReader<ChildStdout>,
    stderr_tail: Arc<Mutex<String>>,
    binary_path: PathBuf,
    binary_identity: Option<(SystemTime, u64)>,
}

Fields

child: Child

stdin: ChildStdin

stdout: BufReader<ChildStdout>

stderr_tail: Arc<Mutex<String>>

Recent stderr from the AudioEngine (crash/assert output) for app.log when IPC fails.

binary_path: PathBuf

Which binary we spawned; must respawn if resolve_audio_engine_binary starts returning a different path.

binary_identity: Option<(SystemTime, u64)>

metadata().modified() + len() when spawned — same path can be overwritten when the AudioEngine is rebuilt.