Class MmapBuffer

rustcv-camera/src/backend/linux/mod.rs:38–46

A single memory-mapped kernel buffer. 单个内核内存映射缓冲区。 Wraps a raw pointer returned by `mmap()`. Implements `Drop` to ensure `munmap()` is called — preventing resource leaks. 封装 `mmap()` 返回的裸指针。 实现 `Drop` 确保调用 `munmap()` —— 防止资源泄漏。

/// 封装 `mmap()` 返回的裸指针。
/// 实现 `Drop` 确保调用 `munmap()` —— 防止资源泄漏。
struct MmapBuffer {
    /// Pointer to the mapped memory region.
    /// 指向映射内存区域的指针。
    ptr: *mut u8,

    /// Total size of this buffer in bytes.
    /// 此缓冲区的总大小（字节）。
    length: usize,
}

/// # Safety
/// mmap buffers are backed by kernel memory with well-defined access semantics.