Trait PlatformCriticalSection 

pub trait PlatformCriticalSection {
    // Required methods
    fn acquire() -> u32;
    fn release(token: u32);
}

Global mutual exclusion against preemption + ISR delivery (Phase 121.9).

Backs the Rust critical_section::Impl registration used by DDS, nros-rmw-{xrce,zenoh}, and any other no_std consumer of critical_section::with(). The token returned by acquire is passed back to release; it holds whatever bookkeeping the platform needs to restore the prior posture (Cortex-M PRIMASK bit, Cortex-R CPSR I-bit, RISC-V mstatus.MIE snapshot, pthread recursion depth, etc.) and is opaque to callers.

Reentrant by contract: nested acquire / release pairs must stack — the platform impl is responsible for nesting (PRIMASK already stacks; pthread side uses a recursive mutex).

Required Methods

fn acquire() -> u32

Enter a critical section. Returns an opaque token to pass to Self::release.

fn release(token: u32)

Leave a critical section, restoring the posture captured at Self::acquire.

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