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use crate::prelude::v1::*;
use crate::base::*;
use crate::shim::*;
use crate::units::*;
use crate::isr::*;
unsafe impl<T: Sized + Copy> Send for Queue<T> {}
unsafe impl<T: Sized + Copy> Sync for Queue<T> {}
#[derive(Debug)]
pub struct Queue<T: Sized + Copy> {
queue: FreeRtosQueueHandle,
item_type: PhantomData<T>,
}
impl<T: Sized + Copy> Queue<T> {
pub fn new(max_size: usize) -> Result<Queue<T>, FreeRtosError> {
let item_size = mem::size_of::<T>();
let handle = unsafe { freertos_rs_queue_create(max_size as u32, item_size as u32) };
if handle == 0 as *const _ {
return Err(FreeRtosError::OutOfMemory);
}
Ok(Queue {
queue: handle,
item_type: PhantomData,
})
}
pub fn send<D: DurationTicks>(&self, item: T, max_wait: D) -> Result<(), FreeRtosError> {
unsafe {
if freertos_rs_queue_send(self.queue,
&item as *const _ as FreeRtosVoidPtr,
max_wait.to_ticks()) != 0 {
Err(FreeRtosError::QueueSendTimeout)
} else {
Ok(())
}
}
}
pub fn send_from_isr(&self,
context: &mut InterruptContext,
item: T)
-> Result<(), FreeRtosError> {
unsafe {
if freertos_rs_queue_send_isr(self.queue,
&item as *const _ as FreeRtosVoidPtr,
context.get_task_field_mut()) != 0 {
Err(FreeRtosError::QueueFull)
} else {
Ok(())
}
}
}
pub fn receive<D: DurationTicks>(&self, max_wait: D) -> Result<T, FreeRtosError> {
unsafe {
let mut buff = mem::zeroed::<T>();
let r = freertos_rs_queue_receive(self.queue,
&mut buff as *mut _ as FreeRtosMutVoidPtr,
max_wait.to_ticks());
if r == 0 {
return Ok(buff);
} else {
return Err(FreeRtosError::QueueReceiveTimeout);
}
}
}
}
impl<T: Sized + Copy> Drop for Queue<T> {
fn drop(&mut self) {
unsafe {
freertos_rs_queue_delete(self.queue);
}
}
}