Struct Semaphore 

pub struct Semaphore { /* private fields */ }

Semaphore implementation

Implementations

impl Semaphore

pub const fn new(initial: u32, max: u32) -> Self

Create a new semaphore

pub fn wait(&self)

Wait on semaphore (P operation)

pub fn try_wait(&self) -> bool

Try to wait on semaphore without blocking

pub fn signal(&self) -> Result<(), KernelError>

Signal semaphore (V operation).

Returns Err if signalling would exceed the maximum count, indicating a caller bug (more signals than waits). This avoids a kernel panic inside what may be a lock-holding context.

pub fn count(&self) -> u32

Get current count