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/*
* Copyright (c) 2006-2025, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2025-10-10 foxglove RT-Thread Queue implementation
*/
use crate::api::*;
use crate::{panic::panic_on_atomic_context, RTTError};
use core::cell::UnsafeCell;
use core::marker::PhantomData;
use core::mem::{size_of, MaybeUninit};
use core::ffi::c_void;
const RT_WAITING_FOREVER: isize = -1;
unsafe impl<T> Send for Queue<T> where T: Send {}
unsafe impl<T> Sync for Queue<T> where T: Send {}
#[derive(Debug)]
pub struct Queue<T> {
queue: APIRawQueue,
item_type: PhantomData<UnsafeCell<T>>,
}
impl<T> Queue<T> {
pub fn new(max_size: usize) -> Result<Queue<T>, RTTError> {
queue_create("Unnamed", max_size as _, size_of::<T>() as _)
.ok_or(RTTError::OutOfMemory)
.map(|m| Queue {
queue: m,
item_type: PhantomData,
})
}
pub fn new_with_name(name: &str, max_size: usize) -> Result<Queue<T>, RTTError> {
queue_create(name, max_size as _, size_of::<T>() as _)
.ok_or(RTTError::OutOfMemory)
.map(|m| Queue {
queue: m,
item_type: PhantomData,
})
}
pub fn try_send(&self, item: T) -> Result<(), (RTTError, T)> {
self._send(item, 0)
}
pub fn send(&self, item: T, max_wait: i32) -> Result<(), (RTTError, T)> {
panic_on_atomic_context("send");
self._send(item, max_wait)
}
pub fn send_wait_forever(&self, item: T) -> Result<(), (RTTError, T)> {
panic_on_atomic_context("send_wait_forever");
self._send(item, RT_WAITING_FOREVER as _)
}
fn _send(&self, item: T, max_wait: i32) -> Result<(), (RTTError, T)> {
let inner = MaybeUninit::new(item);
let ret = queue_send_wait(
self.queue,
inner.as_ptr() as *const c_void,
size_of::<T>() as _,
max_wait,
);
return if !is_eok(ret) {
unsafe { Err((RTTError::QueueSendTimeout, inner.assume_init())) }
} else {
Ok(())
};
}
pub fn try_recv(&self) -> Result<T, RTTError> {
self._receive(0)
}
pub fn recv(&self, max_wait: i32) -> Result<T, RTTError> {
panic_on_atomic_context("recv");
self._receive(max_wait)
}
pub fn recv_wait_forever(&self) -> Result<T, RTTError> {
panic_on_atomic_context("recv_wait_forever");
self._receive(RT_WAITING_FOREVER as _)
}
fn _receive(&self, max_wait: i32) -> Result<T, RTTError> {
let mut inner = MaybeUninit::<T>::uninit();
let ret = queue_receive_wait(
self.queue,
inner.as_mut_ptr() as *mut c_void,
size_of::<T>() as _,
max_wait,
);
return if is_eok(ret) {
Ok(unsafe { inner.assume_init() })
} else {
Err(RTTError::QueueReceiveTimeout)
};
}
}
impl<T> Drop for Queue<T> {
fn drop(&mut self) {
queue_delete(self.queue);
}
}
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