Method entry

src/monitor.rs:216–253

Read the entry at the given ring-buffer slot (0..255).

(&self, slot: usize)

    /// Read the entry at the given ring-buffer slot (0..255).
    pub fn entry(&self, slot: usize) -> Option<MonitorEntry> {
        if slot >= RING_CAPACITY {
            return None;
        }
        let off = HEADER_SIZE + slot * ENTRY_SIZE;
        if self.mmap.len() < off + ENTRY_SIZE {
            return None;
        }

        let prefix = read_str(&self.mmap, off + EOFF_PREFIX);
        let project = read_str(&self.mmap, off + EOFF_PROJECT);
        let tool_name = read_str(&self.mmap, off + EOFF_TOOL);

        let delta = u64::from_le_bytes(
            self.mmap[off + EOFF_DELTA..off + EOFF_DELTA + 8]
                .try_into()
                .unwrap_or([0; 8]),
        );
        let before = u64::from_le_bytes(
            self.mmap[off + EOFF_BEFORE..off + EOFF_BEFORE + 8]
                .try_into()
                .unwrap_or([0; 8]),
        );
        let timestamp = u64::from_le_bytes(
            self.mmap[off + EOFF_TIMESTAMP..off + EOFF_TIMESTAMP + 8]
                .try_into()
                .unwrap_or([0; 8]),
        );

        Some(MonitorEntry {
            prefix,
            project,
            tool_name,
            delta,
            before,
            timestamp,
        })
    }

    /// Re-read the mmap to pick up new writes.
    pub fn refresh(&mut self) -> std::io::Result<()> {