Struct ShmHeader 

pub struct ShmHeader {

    pub magic: u32,
    pub version: u32,
    pub flags: u32,
    pub ready: Atomic<u32>,
    pub heartbeat: Atomic<u32>,
    pub error_code: u32,
    pub shutdown_request: Atomic<u32>,
    pub tasks_issued: Atomic<u32>,
    pub tasks_completed: Atomic<u32>,
    pub block_size: Atomic<u32>,
    pub num_input_channels: Atomic<u32>,
    pub num_output_channels: Atomic<u32>,
    pub request_type: Atomic<u32>,
    pub request_status: Atomic<u32>,
    pub scratch_size: Atomic<u32>,
    pub parent_window: Atomic<u64>,
    /* private fields */
}

Shared-memory header (256 bytes).

Fields

magic: u32

version: u32

flags: u32

ready: Atomic<u32>

heartbeat: Atomic<u32>

error_code: u32

shutdown_request: Atomic<u32>

tasks_issued: Atomic<u32>

tasks_completed: Atomic<u32>

block_size: Atomic<u32>

num_input_channels: Atomic<u32>

num_output_channels: Atomic<u32>

request_type: Atomic<u32>

Request type: 0 = none, 1 = save_state, 2 = restore_state, 3 = gui_show, 4 = gui_hide

request_status: Atomic<u32>

Request status: 0 = pending, 1 = success, 2 = error

scratch_size: Atomic<u32>

Valid bytes in scratch area for state operations

parent_window: Atomic<u64>

Parent window ID for GUI embedding (X11 window ID on Unix, HWND on Windows)

Implementations

impl ShmHeader

pub fn parent_window_usize(&self) -> usize

Load parent_window as a usize (handles 32- and 64-bit platforms).

pub fn set_parent_window(&self, window: usize)

Store a usize parent_window (truncates on 32-bit, but HWNDs/XIDs are always within 64 bits).

Trait Implementations

impl Default for ShmHeader

fn default() -> ShmHeader

Returns the “default value” for a type.