Method acquire

rust/src/lock.rs:39–62

Acquire file lock to prevent race conditions accessing the cache folder by concurrent SM processes

(
        log: &Logger,
        target: &Path,
        single_file: Option<String>,
    )

impl Lock {
    // Acquire file lock to prevent race conditions accessing the cache folder by concurrent SM processes
    pub fn acquire(
        log: &Logger,
        target: &Path,
        single_file: Option<String>,
    ) -> Result<Self, Error> {
        let lock_folder = if single_file.is_some() {
            create_parent_path_if_not_exists(target)?;
            target.parent().unwrap()
        } else {
            create_path_if_not_exists(target)?;
            target
        };
        let path = lock_folder.join(LOCK_FILE);
        let file = File::create(&path)?;

        log.debug(format!("Acquiring lock: {}", path.display()));
        file.lock_exclusive().unwrap_or_default();
        set_lock_path(Some(path.to_path_buf()));

        Ok(Self {
            file: Some(file),
            path,
        })
    }

    pub fn release(&mut self) {
        if let Some(file) = self.file.take() {