Trait PriorityNumber

pub unsafe trait PriorityNumber: Copy {
    const MAX_PRIORITY_NUMBER: usize;

    // Required methods
    fn number(self) -> usize;
    fn from_number(value: usize) -> Result<Self>;
}

Trait for enums of priority levels.

This trait should be implemented by a peripheral access crate (PAC) on its enum of available priority numbers for a specific device. Each variant must convert to a usize of its priority level.

Safety

• This trait must only be implemented on a PAC of a RISC-V target.
• This trait must only be implemented on enums of priority levels.
• Each enum variant must represent a distinct value (no duplicates are permitted).
• Each enum variant must always return the same value (do not change at runtime).
• All the priority level numbers must be less than or equal to MAX_PRIORITY_NUMBER.
• MAX_PRIORITY_NUMBER must coincide with the highest allowed priority number.

Required Associated Constants

const MAX_PRIORITY_NUMBER: usize

Number assigned to the highest priority level.

Required Methods

fn number(self) -> usize

Converts a priority level to its corresponding number.

fn from_number(value: usize) -> Result<Self>

Tries to convert a number to a valid priority level.

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