Trait EmbeddedState 

pub trait EmbeddedState:
    Pod
    + Zeroable
    + Default
    + Copy
    + Send
    + Sync
    + 'static {
    const VERSION: u32 = 1;

    // Provided method
    fn is_embedded() -> bool { ... }
}

Trait for state types that can be embedded directly in ControlBlock.

Types implementing this trait must:

• Be Pod + Zeroable (plain old data, safe to reinterpret)
• Be Default for initialization
• Be Copy for efficient transfer
• Fit within 24 bytes (checked at compile time via EmbeddedStateSize)

Example

#[derive(Default, Clone, Copy, Pod, Zeroable)]
#[repr(C, align(8))]
struct MyState {
    value_a: u64,
    value_b: u64,
    counter: u32,
    _pad: u32,
}

impl EmbeddedState for MyState {}

Provided Associated Constants

const VERSION: u32 = 1

State version for forward compatibility. Override to support migrations.

Provided Methods

fn is_embedded() -> bool

Whether this state is embedded (true) or external (false).

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl EmbeddedState for StateDescriptor