Struct Semaphore 

pub struct Semaphore { /* private fields */ }

A counting or binary semaphore

Implementations

impl Semaphore

pub fn new_binary() -> Result<Semaphore, FreeRtosError>

Create a new binary semaphore

pub fn new_counting(max: u32, initial: u32) -> Result<Semaphore, FreeRtosError>

Create a new counting semaphore

pub unsafe fn from_raw_handle(handle: FreeRtosSemaphoreHandle) -> Self

Safety

handle must be a valid FreeRTOS semaphore handle.

Only binary or counting semaphore is expected here. To create mutex from raw handle use crate::mutex::MutexInnerImpl::from_raw_handle.

pub fn raw_handle(&self) -> FreeRtosSemaphoreHandle

pub fn lock<D: DurationTicks>( &self, max_wait: D, ) -> Result<SemaphoreGuard<'_>, FreeRtosError>

Lock this semaphore in a RAII fashion

pub fn give(&self) -> bool

Returns true on success, false when semaphore count already reached its limit

pub fn take<D: DurationTicks>(&self, max_wait: D) -> Result<(), FreeRtosError>

pub fn give_from_isr(&self, context: &mut InterruptContext) -> bool

Returns true on success, false when semaphore count already reached its limit

pub fn take_from_isr(&self, context: &mut InterruptContext) -> bool

Returns true on success, false if the semaphore was not successfully taken because it was not available

Trait Implementations

impl Drop for Semaphore

fn drop(&mut self)

Executes the destructor for this type.

impl Send for Semaphore

impl Sync for Semaphore