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98 lines
2.1 KiB
Rust

/*
* opencl stream executor
* Copyright (C) 2021 trivernis
* See LICENSE for more information
*/
use crossbeam_channel::{Receiver, Sender};
use crate::utils::result::{OCLStreamError, OCLStreamResult};
/// Creates a new OCLStream with the corresponding sender
/// to communicate between the scheduler thread and the receiver thread
pub fn unbounded<T>() -> (OCLStream<T>, OCLStreamSender<T>)
where
T: Send + Sync,
{
let (tx, rx) = crossbeam_channel::unbounded();
let stream = OCLStream { rx };
let sender = OCLStreamSender { tx };
(stream, sender)
}
/// Creates a new OCLStream with the corresponding sender and a maximum capacity
/// to communicate between the scheduler thread and the receiver thread
pub fn bounded<T>(size: usize) -> (OCLStream<T>, OCLStreamSender<T>)
where
T: Send + Sync,
{
let (tx, rx) = crossbeam_channel::bounded(size);
let stream = OCLStream { rx };
let sender = OCLStreamSender { tx };
(stream, sender)
}
/// Receiver for OCL Data
#[derive(Clone, Debug)]
pub struct OCLStream<T>
where
T: Send + Sync,
{
rx: Receiver<OCLStreamResult<T>>,
}
impl<T> OCLStream<T>
where
T: Send + Sync,
{
/// Reads the next value from the channel
pub fn next(&mut self) -> Result<T, OCLStreamError> {
self.rx.recv()?
}
/// Returns if there is a value in the channel
pub fn has_next(&self) -> bool {
!self.rx.is_empty()
}
}
/// Sender for OCL Data
pub struct OCLStreamSender<T>
where
T: Send + Sync,
{
tx: Sender<OCLStreamResult<T>>,
}
impl<T> Clone for OCLStreamSender<T>
where
T: Send + Sync,
{
fn clone(&self) -> Self {
Self {
tx: self.tx.clone(),
}
}
}
impl<T> OCLStreamSender<T>
where
T: Send + Sync,
{
/// Sends a value into the channel
pub fn send(&self, value: T) -> OCLStreamResult<()> {
self.tx
.send(Ok(value))
.map_err(|_| OCLStreamError::SendError)
}
/// Sends an error into the channel
pub fn err(&self, err: OCLStreamError) -> OCLStreamResult<()> {
self.tx
.send(Err(err))
.map_err(|_| OCLStreamError::SendError)
}
}