Trait PlatformLog 

pub trait PlatformLog {
    // Required method
    fn write(severity: u8, name: &[u8], message: &[u8]);

    // Provided method
    fn flush() { ... }
}

Per-platform leveled log delivery.

Matches the post-Phase-129 platform-ABI pattern: the portable facade (nros-log) formats messages into a fixed buffer; each nros-platform-<rtos> carries the actual delivery (stderr, printk, esp_log_write, syslog, board-registered UART writer, etc.).

severity is the u8 discriminant of nros_log::Severity (0 = Trace .. 5 = Fatal). Implementors should map onto the platform’s nearest native level.

name is the logger name (UTF-8, NOT null-terminated, may be empty); message is the already-formatted body (UTF-8, NOT null-terminated). Delivery is infallible from the caller’s POV; platforms that fill an internal buffer (RTT, syslog) silently drop on overflow.

Thread / ISR safety is per-platform — see the table in docs/roadmap/phase-88-nros-log.md. The ABI itself is synchronous and the caller-side facade carries a recursion guard so a sink that triggers log() from inside write is short-circuited.

Required Methods

fn write(severity: u8, name: &[u8], message: &[u8])

Deliver one record. Severity is a stable u8 matching nros_log::Severity::as_u8().

Provided Methods

fn flush()

Best-effort drain of any internal buffer. Default = no-op.

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.

Implementations on Foreign Types

impl PlatformLog for CffiPlatform

fn write(severity: u8, name: &[u8], message: &[u8])

fn flush()

Implementors