parenchyma 0.0.33

A high-performance computing (HPC) framework
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use {BoxContext, Context, Error, ExtensionPackage, Framework, Hardware, HardwareKind, Result};
use std::marker::{PhantomData, Unsize};
use super::NativeContext;
use utility::TryDefault;

const NATIVE: &'static str = "Native";

/// The native framework
///
/// # Example
///
/// ```rust
/// use parenchyma::{Backend, Native, SharedTensor};
///
/// let ref host: Backend = Backend::new::<Native>().unwrap();
///
/// let sh: SharedTensor = SharedTensor::with(host, [2, 2], vec![1., 2., 3., 4.]).unwrap();
///
/// let tensor = sh.read(host).unwrap();
///
/// println!("{:#?}", tensor);
/// ```
#[derive(Debug)]
pub struct Native {
    hardware: Vec<Hardware>,
}

impl Framework for Native {

    const FRAMEWORK_NAME: &'static str = NATIVE;

    fn selection(&self) -> &[Hardware] {
        &self.hardware
    }
    
    fn available_hardware(&self) -> Vec<Hardware> {
        self.hardware.clone()
    }
}

impl<X> BoxContext<X> for Native 
    where X: ExtensionPackage, 
          NativeContext<X>: Unsize<X::Extension> 
          {

    fn enclose(&mut self, _: Vec<Hardware>) -> Result<Box<Context<Package = X>>> {
        Ok(Box::new(NativeContext(PhantomData)))
    }
}

impl TryDefault for Native {
    type Err = Error;

    fn try_default() -> Result<Native> {
        Ok(Native {
            hardware: vec![Hardware {
                id: 0,
                framework: NATIVE,
                kind: HardwareKind::CPU,
                name: String::from("HOST CPU"),
                compute_units: 1,
            }]
        })
    }
}